ITMI982622A1 - Stabilizzazione di poliammide, poliestere e poliacetale. - Google Patents
Stabilizzazione di poliammide, poliestere e poliacetale. Download PDFInfo
- Publication number
- ITMI982622A1 ITMI982622A1 IT1998MI002622A ITMI982622A ITMI982622A1 IT MI982622 A1 ITMI982622 A1 IT MI982622A1 IT 1998MI002622 A IT1998MI002622 A IT 1998MI002622A IT MI982622 A ITMI982622 A IT MI982622A IT MI982622 A1 ITMI982622 A1 IT MI982622A1
- Authority
- IT
- Italy
- Prior art keywords
- tert
- bis
- butyl
- polyamide
- hydroxy
- Prior art date
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- 239000004952 Polyamide Substances 0.000 title claims description 32
- 229920002647 polyamide Polymers 0.000 title claims description 32
- 229920000728 polyester Polymers 0.000 title claims description 26
- 230000006641 stabilisation Effects 0.000 title description 8
- 238000011105 stabilization Methods 0.000 title description 8
- 239000000203 mixture Substances 0.000 claims description 38
- 229920006324 polyoxymethylene Polymers 0.000 claims description 20
- 239000003381 stabilizer Substances 0.000 claims description 18
- 239000000654 additive Substances 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 14
- 230000015556 catabolic process Effects 0.000 claims description 9
- 238000006731 degradation reaction Methods 0.000 claims description 9
- 229920001577 copolymer Polymers 0.000 claims description 8
- 229920002292 Nylon 6 Polymers 0.000 claims description 7
- 229930182556 Polyacetal Natural products 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 239000002530 phenolic antioxidant Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
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- 238000000034 method Methods 0.000 claims description 5
- 150000001879 copper Chemical class 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 150000007524 organic acids Chemical class 0.000 claims description 4
- XRBCRPZXSCBRTK-UHFFFAOYSA-N phosphonous acid Chemical compound OPO XRBCRPZXSCBRTK-UHFFFAOYSA-N 0.000 claims description 4
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- 239000004611 light stabiliser Substances 0.000 claims 1
- -1 polypropylene Polymers 0.000 description 82
- 125000004432 carbon atom Chemical group C* 0.000 description 41
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 34
- 229910052757 nitrogen Inorganic materials 0.000 description 29
- 125000000217 alkyl group Chemical group 0.000 description 22
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 19
- 239000002253 acid Substances 0.000 description 17
- 239000001257 hydrogen Substances 0.000 description 17
- 229910052739 hydrogen Inorganic materials 0.000 description 17
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- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 8
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 8
- 150000001991 dicarboxylic acids Chemical class 0.000 description 8
- 238000001746 injection moulding Methods 0.000 description 8
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 8
- ACZGCWSMSTYWDQ-UHFFFAOYSA-N 3h-1-benzofuran-2-one Chemical class C1=CC=C2OC(=O)CC2=C1 ACZGCWSMSTYWDQ-UHFFFAOYSA-N 0.000 description 7
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- 239000003795 chemical substances by application Substances 0.000 description 6
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- 239000008187 granular material Substances 0.000 description 6
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- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 5
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- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 5
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- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 5
- BPXVHIRIPLPOPT-UHFFFAOYSA-N 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound OCCN1C(=O)N(CCO)C(=O)N(CCO)C1=O BPXVHIRIPLPOPT-UHFFFAOYSA-N 0.000 description 4
- ALVZNPYWJMLXKV-UHFFFAOYSA-N 1,9-Nonanediol Chemical compound OCCCCCCCCCO ALVZNPYWJMLXKV-UHFFFAOYSA-N 0.000 description 4
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 229930185605 Bisphenol Natural products 0.000 description 4
- QFOHBWFCKVYLES-UHFFFAOYSA-N Butylparaben Chemical compound CCCCOC(=O)C1=CC=C(O)C=C1 QFOHBWFCKVYLES-UHFFFAOYSA-N 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 4
- 239000001294 propane Substances 0.000 description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 150000005846 sugar alcohols Polymers 0.000 description 4
- RMSGQZDGSZOJMU-UHFFFAOYSA-N 1-butyl-2-phenylbenzene Chemical group CCCCC1=CC=CC=C1C1=CC=CC=C1 RMSGQZDGSZOJMU-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229930040373 Paraformaldehyde Natural products 0.000 description 3
- 229920012196 Polyoxymethylene Copolymer Polymers 0.000 description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-N Propionic acid Substances CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 3
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- 125000002947 alkylene group Chemical group 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
- 239000001273 butane Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
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- 125000001424 substituent group Chemical group 0.000 description 3
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- 239000011593 sulfur Substances 0.000 description 3
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 description 2
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 2
- 150000005208 1,4-dihydroxybenzenes Chemical class 0.000 description 2
- BWJKLDGAAPQXGO-UHFFFAOYSA-N 2,2,6,6-tetramethyl-4-octadecoxypiperidine Chemical compound CCCCCCCCCCCCCCCCCCOC1CC(C)(C)NC(C)(C)C1 BWJKLDGAAPQXGO-UHFFFAOYSA-N 0.000 description 2
- UIAFKZKHHVMJGS-UHFFFAOYSA-N 2,4-dihydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1O UIAFKZKHHVMJGS-UHFFFAOYSA-N 0.000 description 2
- SLUKQUGVTITNSY-UHFFFAOYSA-N 2,6-di-tert-butyl-4-methoxyphenol Chemical compound COC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SLUKQUGVTITNSY-UHFFFAOYSA-N 0.000 description 2
- ONTODYXHFBKCDK-UHFFFAOYSA-N 2-(2,4-dimethylphenyl)-1,3,5-triazine Chemical compound CC1=CC(C)=CC=C1C1=NC=NC=N1 ONTODYXHFBKCDK-UHFFFAOYSA-N 0.000 description 2
- KXPXKNBDCUOENF-UHFFFAOYSA-N 2-(Octylthio)ethanol Chemical compound CCCCCCCCSCCO KXPXKNBDCUOENF-UHFFFAOYSA-N 0.000 description 2
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- SAEZGDDJKSBNPT-UHFFFAOYSA-N 3-dodecyl-1-(1,2,2,6,6-pentamethylpiperidin-4-yl)pyrrolidine-2,5-dione Chemical compound O=C1C(CCCCCCCCCCCC)CC(=O)N1C1CC(C)(C)N(C)C(C)(C)C1 SAEZGDDJKSBNPT-UHFFFAOYSA-N 0.000 description 2
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- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 2
- 125000004203 4-hydroxyphenyl group Chemical group [H]OC1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- CYYZDBDROVLTJU-UHFFFAOYSA-N 4-n-Butylphenol Chemical compound CCCCC1=CC=C(O)C=C1 CYYZDBDROVLTJU-UHFFFAOYSA-N 0.000 description 2
- CKPKHTKLLYPGFM-UHFFFAOYSA-N 6,6-dimethylheptane-1,1-diol Chemical compound CC(CCCCC(O)O)(C)C CKPKHTKLLYPGFM-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 229920001174 Diethylhydroxylamine Polymers 0.000 description 2
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- YIKSCQDJHCMVMK-UHFFFAOYSA-N Oxamide Chemical compound NC(=O)C(N)=O YIKSCQDJHCMVMK-UHFFFAOYSA-N 0.000 description 2
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- JWUXJYZVKZKLTJ-UHFFFAOYSA-N Triacetonamine Chemical compound CC1(C)CC(=O)CC(C)(C)N1 JWUXJYZVKZKLTJ-UHFFFAOYSA-N 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 description 2
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- 239000001361 adipic acid Substances 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
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- 239000003963 antioxidant agent Substances 0.000 description 2
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- 239000004305 biphenyl Substances 0.000 description 2
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 2
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- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 2
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- 239000008116 calcium stearate Substances 0.000 description 2
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- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 description 2
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical class O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 2
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- 239000000454 talc Substances 0.000 description 2
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- 239000003760 tallow Substances 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
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- 229910001380 potassium hypophosphite Inorganic materials 0.000 description 1
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- 210000002966 serum Anatomy 0.000 description 1
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- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
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- IJRHDFLHUATAOS-DPMBMXLASA-M sodium ricinoleate Chemical compound [Na+].CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O IJRHDFLHUATAOS-DPMBMXLASA-M 0.000 description 1
- 229940074404 sodium succinate Drugs 0.000 description 1
- ZDQYSKICYIVCPN-UHFFFAOYSA-L sodium succinate (anhydrous) Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O ZDQYSKICYIVCPN-UHFFFAOYSA-L 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- NQRYJNQNLNOLGT-UHFFFAOYSA-N tetrahydropyridine hydrochloride Natural products C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 1
- NZNAAUDJKMURFU-UHFFFAOYSA-N tetrakis(2,2,6,6-tetramethylpiperidin-4-yl) butane-1,2,3,4-tetracarboxylate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CC(C(=O)OC1CC(C)(C)NC(C)(C)C1)C(C(=O)OC1CC(C)(C)NC(C)(C)C1)CC(=O)OC1CC(C)(C)NC(C)(C)C1 NZNAAUDJKMURFU-UHFFFAOYSA-N 0.000 description 1
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- 238000005809 transesterification reaction Methods 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- IVIIAEVMQHEPAY-UHFFFAOYSA-N tridodecyl phosphite Chemical compound CCCCCCCCCCCCOP(OCCCCCCCCCCCC)OCCCCCCCCCCCC IVIIAEVMQHEPAY-UHFFFAOYSA-N 0.000 description 1
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 1
- CNUJLMSKURPSHE-UHFFFAOYSA-N trioctadecyl phosphite Chemical compound CCCCCCCCCCCCCCCCCCOP(OCCCCCCCCCCCCCCCCCC)OCCCCCCCCCCCCCCCCCC CNUJLMSKURPSHE-UHFFFAOYSA-N 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
- 235000019165 vitamin E Nutrition 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 150000003751 zinc Chemical class 0.000 description 1
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- BOXSVZNGTQTENJ-UHFFFAOYSA-L zinc dibutyldithiocarbamate Chemical compound [Zn+2].CCCCN(C([S-])=S)CCCC.CCCCN(C([S-])=S)CCCC BOXSVZNGTQTENJ-UHFFFAOYSA-L 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- 239000002076 α-tocopherol Substances 0.000 description 1
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- 239000011590 β-tocopherol Substances 0.000 description 1
- QUEDXNHFTDJVIY-UHFFFAOYSA-N γ-tocopherol Chemical class OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1 QUEDXNHFTDJVIY-UHFFFAOYSA-N 0.000 description 1
- 239000002446 δ-tocopherol Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
- C08K5/5333—Esters of phosphonic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L59/00—Compositions of polyacetals; Compositions of derivatives of polyacetals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyamides (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
Description
La presente invenzione riguarda composizioni che comprendono una poliammide, un poliestere oppure un polichetone, riguarda uno specifico antiossidante fenolico, il suo impiego per stabilizzare poliammidi, poliesteri oppure poliacetali nei confronti di una degradazione ossidativa, termica e/o foto-indotta e riguarda anche un procedimento per stabilizzare queste materie plastiche.
Dai brevetti US 3.691.131 e 3.860.558 è noto che si possono stabilizzare poliammidi oon antiossidanti fenolici in presenza di ipofosfiti di metalli per esempio ipofosfito di potassio oppure ipofosfito\di sodio e di sali di rame di acidi organici.
In poliammidi, poliesteri oppure poliacetali, queste miscele di stabilizzanti note non possono soddisfare a tutti i requisiti posti su di essi. È noto che tali miscele di stabilizzanti fanno diminuire il colore di partenza e anche lo sviluppo di colore della poliammide durante un invecchiamento in forno e che essi inoltre fanno diminuire la compromissione delie proprietà meccaniche della poliammide durante l'invecchiamento in forno e durante l'esposizione alla luce.
Si è ora trovato che uno specifico antiossidante fenolico, che è scelto dai brevetti US 3.691.131 e 3.860.558, è particolarmente adatto come stabilizzante per poliammidi, poliesteri oppure poliacetali in assenza di ipofosfiti di metalli e di sali di rame di acidi organici. Le poliammidi, i poliesteri oppure i poliacetali stabilizzati in questo modo hanno migliorate proprietà per ciò che riguarda la degradazione ossidativa, la degradazione termica e/o la degradazione provocata dalla luce.
Pertanto, la presente invenzione riguarda composizioni che comprendono:
a)una poliammide, un poliestere oppure un poliacetale che è soggetto a degradazione ossidativa, termica oppure foto-indotta, e
b)il composto di formula I ^
con la condizione che, se il componente (a) è un polìammide, allora la composizione non contiene un ipo
fosfito di un metallo e non contiene un sale di rame di un acido organico.
Il componente (b) della nuova composizione, oppure il composto di formula I è noto e porta il numero di registrazione di Chemical Abstracts [37042-77-6]. La preparazione del composto di formula I è descritta in GB-A-1251 840, esempio 1, pagina 5.
Si deve intendere che con il termine poliammidi si indicano poliammidi oppure copoliammidi alifatiche ed aromatiche che derivano da diammine e da acidi bicarbossilici e/o da acidi amminocarbossilici o dai loro corrispondenti lattami. Poliammidi adatte sono per esempio PA 6, PA 11, PA 12, PA 46, PA 6.6, PA 4.6, PA 6.9, PA 6.10 oppure PA 6.12, PA 10.12, PA 12.12 e inoltre poliammidi amorfe del tipo Trogamid PA 6-3-T e Grilamid TR 55. Le poliammidi del tipo indicato comunemente sono note e sono reperibili ) in commercio .
Composizioni interessanti sono quelli nelle quali il componente (a) è poliammide 6, poliammide 6.6, poliammide 4.6, poliammide 11 oppure poliammide 12, oppure un loro copolimero, in particolare poliammide 6 oppure poliammide 6.6 oppure poliammide 6 modificata con elastomeri oppure poliammide 6.6 mescolata con polipropilene .
I poliesteri usati possono essere omopoliesteri oppure copoliesteri che sono costituiti da acidi bicarbossilici alitatici, cicloalifatici oppure aromatici e da dioli oppure da acidi idrossicarbossilici.
Gli acidi bicarbossilici alifatici possono contenere da 2 a 40 atomi di carbonio, gli acidi bicarbossilici cicloalifatici da 6 a 10 atomi di carbonio, gli acidi bicarbossilici aromatici da 8 a 14 atomi di carbonio, gli acidi idrossicarbossilici alifatici da 2 a 12 atomi di carbonio e gli acidi idrossicarbossilici aromatici, per esempio cicloalifatici, da 7 a 14 atomi di carbonio.
I dioli alifatici possono contenere da 2 a 12 atomi di carbonio, i dioli cicloalifatici da 5 a 8 atomi di carbonio ed i dioli aromatici da 6 a 16 atomi di carbonio.
I dioli aromatici sono quelli nei quali due gruppi ossidrilici sono collegati ad uno oppure a differenti radicali di idrocarburi aromatici.
I poliesteri possono anche essere ramificati con piccole quantità, per esempio 0,1 fino a 3 moli %, riferito agli acidi bicarbossilici presenti, di monomeri più che bifunzionali (per esempio pentaeritritolo, acido trimellitico, 1,3,5-tri(idrossifenil)-benzene, acido 2,4-diidrossibenzoico oppure (4-idrossifenil) ~2- (2, 4-diidrossifenil)propano.
I poliesteri costituiti da almeno due monomeri possono essere distribuiti con distribuzione casuale oppure possono essere copolimeri a blocchi.
Acidi bicarbossilici adatti sono acidi bicarbossilici alifatici saturi lineari e ramificati, acidi bicarbossilici aromatici e acidi bicarbossilici cicloalifatici .
Adatti acidi bicarbossilici alifatici sono quelli contenenti da 2 a 40 atomi di carbonio, per esempio acido ossalico, acido maionico, acido dimetilmalonico, acido succinico, acido pimelico, acido adipico, acido trimetiladipico, acido sebacico, acido azelaico e acidi dimerici (prodotti di dimerizzazione di acidi carbossilici alifatici insaturi per esempio acido oleico), acido maionico alchilato e acido succinico alchilato ad esempio acido ottadecilsuccinico.
Adatti acidi bicarbossilici cicloalifatici sono: acido 1,3-ciclobutanbicarbossilico, acido<v >1,3-ciclopentanbicarbossilico, acido 1,3- e 1,4-cicloesanbicarbossilico, 1,3- e 1,4-(bicarbossimetil)-cicloesano, acido 4,4'-dicicloesilbicarbossilico.
Adatti acidi bicarbossilici aromatici sono: in particolare, acido tereftalico, acido isoftalico, acido o-ftalico e inoltre acido 1,3-, 1,4-, 2,6- oppure 2,7-naftalenbicarbossilico, acido 4,4'-difenilbicarbossilico, acido 4,4'-difenilsolfonbicarbossilico, acido 4,4'-benzofenonbicarbossilico,
1,1,3-trimetil-5-carbossil-3- (p-carbossifenil)indano, acido 4,4'-difenil etere bicarbossilico, bis-p-(carbossilfenil)metano oppure bis-p-(carbossilfenil)-etano.
Gli acidi bicarbossilici aromatici sono preferiti e, tra questi, in particolare l'acido tereftalico, l'acido isoftalico e l'acido 2,6-naftalenbicarbossilico .
Altri acidi bicarbossilici adatti sono quelli contenenti gruppi -CO-NH; essi sono descritti in DE-A-2 414 349. Sono adatti anche acidi bicarbossilici contenenti anelli N-eterociclici, per esempio quelli che derivano da acidi monoammino-s-triazinbicarbossilici, carbossilalchilati, carbossilienilati oppure carbossibenzilati (vedi DE-A-2121 184 e 2 533 675), monoidantoine oppure bisidantoine, benzimmidazoli eventualmente alogenafci' oppure acido parabanico. In questo contesto, i gruppi carbossialchilici possono contenere da 3 a 20 atomi di carbonio.
Adatti dioli alifatici sono i glicoli alifatici lineari e ramificati,, in particolare quelli contenenti 2 fino a 12, preferibilmente 2 fino a 6 atomi di carbonio nella molecola, per esempio: etilen glicole, 1.2- e 1,3-propilen glicole, 1,2-, 1,3-, 2,3- oppure 1,4-butandiolo, pentilglicole, neopentilglicole, 1,6-esandiolo, 1,12-dodecandiolo. Un diolo cicloalifatico adatto è per esempio il 1,4-diidrossicicloesano. Altri dioli alitatici adatti sono, per esempio, 1,4-bis (idrossimetil)cicloesano, dioli aromatici-alifatici come p-xililen glicole oppure 2,5-dicloro-p-xililen glicol, 2,2-(β-idrossietossifenil)propano e poliossialchilen glicoli per esempio etilen glicole, trietilen glicole, polietilen glicole oppure polipropilen glicole. Gli alchilen dioli sono preferibilmente lineari e contengono preferibilmente da 2 a 4 atomi di carbonio.
Dioli preferiti sono gli alchilendioli, il 1,4-diidrossicicloesano e il 1,4-bis(idrossimetil)-cicloesano. Glicole etilenico, 1,4-butandiolo e 1,2— e 1.3-propilen glicole sono particolarmente preferiti.
Altri adatti dioli alitatici sono bisfenoli βidrossialchilati, in particolare bisfenoli ^ idrossietìlati, per esempio il 2,2-bis[4<f>-(β-idrossietossi) fenil]propano. Altri bisfenoli vengono citati qui di seguito.
Un altro gruppo di dioli alifatici adatti è quello di dioli eterociclici descritti in DE-A-1 812 003 , DE-A-2 342 432 , DE-A-2 342 372 e DE-A-2 453 326. Esempi sono: Ν,Ν'-bis(β-idrossietil)-5,5-dimetilidantoina, N,N<r >-bis(β-idrossipropil)-5,5-dimetil-idantoina, metilene-bis- [N-{β-idrossietil)-5-metil-5-etilidantoina], metilene-bis- [N-(β-idrossietil)-5,5-dimetilidantoina], Ν,Ν'-bis(β-idrossietil)benzimmidazolone, N,N' -bis(β-idrossietil)-(tetracloro)benzimmidazolone oppure N,N'-bis(β-idrossietil)-(tetrabromo)benzimmidazolone .
Adatti dioli aromatici sono bifenoli mononucleari e, in particolare, difenoli dinucleari che portano un gruppo ossidrile in corrispondenza di ciascun nucleo aromatico. Si intende che il termine aromatico si riferisce preferibilmente a radicali idrocarburici aromatici, per esempio fenilene oppure naftilene. Oltre a, per esempio, idrochinone, resorcinolo oppure 1,5-, 2,6- e 2,7-diidronaftalene, si possono citare in particolare bisfenoli che possono essere rappresentati dalle seguenti formule: '
I gruppi ossidrilici possono essere in posizione meta e, in particolare, in posizione para. R' e R" in queste formule, possono significare alchile contenente 1 fino a 6 atomi di carbonio, alogeno, come cloro oppure bromo e, preferibilmente, atomi di idrogeno. A può essere un legame diretto oppure ossigeno, zolfo,
cicloalchilidene oppure alchilene non sostituito oppure sostituito. ,
Esempi di alchilidene non sostituito oppure sostituito sono: etilidene, 1,1- oppure 2,2-propilidene, 2,2-butilidene, 1,1-isobutilidene, pentilidene, esilidene, eptilidene, ottilidene, dicloroe.tilidene, tricloroetilidene.
Esempi di alchilene non sostituito oppure sostituito sono metilene, etilene, fenilmetilene, bifenilmetilene, metilfenilmetilene. Esempi di cicloalchilidene sono ciclopentilidene, cicloesilidene, cicloeptilidene e cicloottilidene.
Esempi di bisfenoli sono: bis(p-idrossifenil) etere oppure bis (p-idrossifenil) tioetere, bis(pidrossifenil)solfone, bis(p-idrossifenil)metano, bis (4-idrossifenil)-2,2'-difenile, fenilidrochinone, 1,2-bis (p-idrossifenil)etano, 1-fenil-bis(p-idrossifenil)metano, difenil-bis(p-idrossifenil)metano, difenil-bis (p-idrossifenil)etano, bis(3,5-dimetil-4-idrossifenil)solfone, bis(3,5-dimetil-4-idrossifenil)-p-diisopropilbenzene, bis(3,5-dimetil-4-idrossifenil)-m-diisopropilbenzene, 2,2-bis(3',5'-dimetil-4 ’-idrossifenil)propano, 1,1- oppure 2,2-bis(p-idrossifenil)butano, 2, 2-bis(p-idrossifenil)-esafluoropropano, 1,1-dicloro- oppure 1,1,l-tricloro-2,2-bis (p-idrossifenil)etano, 1,1-bis(p-idrossifenil)ciclopentano e, in particolare, 2,2-bis(p-idrossifenil)-propano (bisfenolo A) e 1,1-bis(p-idrossifenil)cicloesano (bisfenolo C).
Adatti poliesteri di acidi idrossicarbossilici sono, per esempio, policaprolattone, polipivalolattone oppure i poliesteri dell'acido 4-idrossicicloesancarbossilico oppure dell'acido 4-idrossibenzoico.
Sono adatti anche polimeri che possono contenere prevalentemente legami estere, ma anche altri legami, per esempio poliestere ammidi oppure poliestere immidi .
Poliesteri contenenti acidi bicarbossilici aromatici sono diventati i più importanti, in particolare i polialchilene tereftalati. Pertanto, si preferiscono quelle composizioni per stampaggio della presente invenzione nelle quali il poliestere è costituito da almeno 30 moli %, preferibilmente da almeno 40 moli % di acidi bicarbossilici aromatici e da almeno 30 moli %, preferibilmente da almeno 40 moli %, di alchilendioli contenenti preferibilmente da 2 a 12 atomi di carbonio, riferito al poliestere.
In questo caso 1'alchilendiolo, preferibilmente, è lineare e contiene da 2 a 6 atomi di carbonio, per esempio etilene-, tri-, tetra- oppure esametilen glicole e acido bicarbossilico aromatico indica acido tereftaìi'co e/o acido isoftalico.
Poliesteri particolarmente adatti sono PET, PETG (polietilene tereftalato modificato con glicoli oppure PBT (polibutilen tereftalato) e corrispondenti copolimeri PET e suoi copolimeri essendo particolarmente preferiti.
Poliacetali sono, per esempio, omopolimeri oppure copolimeri di paraformaldeide, per esempio in particole poliossimetilene (POH) e quei poliossimetileni che contengono comonomeri, per esempio ossido di etilene e poliacetali che sono modificati con poliuretani termoplastici, acrilati oppure MBS.
Composizioni utili sono quelle, come descritte sopra, in cui il componente (B) è presente in una quantità di 0,01-1%, preferibilmente di 0,02 - 0,8%, per esempio di 0,03 - 0,6%, riferito al peso del componente (a).
Oltre ai componenti (a) e (b), le nuove composizioni possono contenere ulteriori additi oppure costabilizzanti, per esempio i seguenti:
1. Antiossidanti
1.1 Monofenoli alchilati per esempio, 2,6-di-tert.-butil-4-metilfenolo, 2-tert.-butil-4,6-dimetilfenolo, 2.6-di-tert .butil-4-etilfenolo, 2,6-di-tert.butil-4-n-butilfenolo, 2,6-di-tert.butil-4-isotìutilfenolo, 2.6-diciclopentil-4-metilfenolo, 2-(a-metilcicloesil)-4,6-dimetilfenolo, 2,6-diottadecil-4-metilfenolo, 2,4,6-tricicloesilfenolo, 2,6-di-tert.butil-4-metossimetilfenolo, nonilfenoli lineari oppure ramificati, nelle catene laterali come per esempio 2,6-di-nonil-4-metilfenolo 2,4-dimetil-6-(1<# >-metilundec-1'-il)-fenolo, 2,4-dimetil-6-(1'-metileptadec-1'-il)-fenolo, 2,4-dimetil-6-(1'-metiltridec-1'-il)-fenolo e loro miscele.
1.2. Alchiltiometilfenoli, per esempio, 2,4-diottiltiometil-6-terz-butilfenolo, 2,4-diottilmetil-6-metilfenolo, 2,4-di-ottiltiometil-6-etilfenolo, 2,6-didodeci1tiometi1-4-noni 1fenolo.
1.3. Idrochinoni e idrochinoni alchilati per esempio 2,6-dì-tert .butil-4-metossifenolo, 2,5-di-tert.butilidrochinone, 2,5-di-tert.amil-idrochinone, 2,6-difenil-4-ottadecilossifenolo, 2,6-di-terz-butilidrochinone, 2,5-di-terz-butil-4-idrossianisolo, 3,5-di-terz-butil-4-idrossianisolo, 3,5-di-terz-butil-4-idrossifenil-stearato, bis-(3,5-di-terz-butil-4-idrossifenil)adipato.
1.4. Tocoferoli, per esempio α-tocoferolo, βtocoferolo, y-tocoferolo, δ-tocoferolo e loro miscele (vitamina E).
1.5 Tiodifenileteri idrossilati, per esempio 2,2'-tiobis- (6-tert.butil-4-metilfenolo), 2,2'-tiobis-(4-ottilfenolo), 4, 4'-tiobis-{6-tert.butil-3-metilfenolo), 4,4'-tiobis- (6-tert.butil-2-metilfenolo), 4,4'-tiobis- (3,6-di-sec-amilfenolo), 4,4'-bis-(2,6-dimetil-4-idrossifenil)-disolfuro .
1.6 Alchiliden-bisfenoli, per esempio, 2, 2' -metilenbis- (6-tert.buti1-4-metilfenolo), 2,2'-metilenbis-(6-tert.bufi1-4-etil fenolo), 2 , 2’ -metilenbis-[4-meti1-6-(α-metilcicloesil) fenolo], 2, 2' -metilenbis-(4-metil-6-cicloesilfenolo) , 2, 2’ -metilenbis-(6-nonil-4-metilfenolo), 2, 2’ -metilenbis-{4,6-di-terz.buti1fenolo), 2,2'-etilidenbis- (4,6-di-terz.butilfenolo), 2,2'-etilidenbis- (6-tert.butil-4-isobutilfenolo) , 2, 2’ -metilenbis- [6-(a-metilbenzil)-4-noni1fenolo], 2,2'-metilenbis- [6-(a,a-dimetilbenzil)-4-nonilfenolo], 4,4'-metilenbis- (2,6-di-tert.butilfenolo), 4,4'-metilenbis- (6-tert.-butil-2-metilfenolo), 1,1-bis-(5-tert .butil-4-idros-i-2-metilfenil)-butano, 2,6-bis-(3-tert.butil-5-metil-2-idrossibenzil)-4-metilfenolo, 1,1,3-tris- (5-tert.butil-4-idrossi-2-metilfenil)-butano, 1,1-bis-(5-tert.butil-4-idrossi-2-metilfenil)-3-n-dodecilmercaptobutano, etileneglicol-bis-[3,3-bis- (3'-tert.butil-4'-idrossifenil)-butirrato], bis-(3-tert.-buti1-4-idrossi-5-metilfenil)-diciclopentadiene, bis- [2-(3'-tert.butil-2'-idrosài-5'-metilbenzil)-6-tert .butil-4-metilfenil]-tereftalato, 1,1-bis- (3,5-dimetil-2-idrossifenil)-butano, 2,2-bis-(3,5-di-tert.-butil-4-idrossifenil)-propano, 2,2-bis-(5-tert.-butil-4-idrossi-2-metilfenil)-4-n-dodecilmercapto-butano, 1,1,5,5-tetra-(5-terz.-butil-4-idrossi-2-metilfenil) -pentano.
1.7. 0-, N- e S-benzilcomposti, per esempio 3,5,3',5'-tetra-ter z.-butil-4,4'-diidrossi-dibenziletere, ottadecil-4-idrossi-3, 5-dimetilbenzil-mercaptoacetato, trideciì-4-idrossi-3,5-di-terz.butilbenzilmercaptoacetato, tris-(3,5-di-terz.-butil-4-idrossibenzil)-ammina, bis-(4-tert.-butil-3-idrossi-2,6-dimetilbenzil )-ditiotereftalato, bis-(3,5-diterz.-butil-4-idrossibenzil) -solfuro, isoottil-3,5-di-terz .-butil-4-idrossibenzilmercaptoacetato.
1.8. Maionati idrossibenzilati, per esempio diottadecil-2,2-bis- (3,5-di-terz.buti1-2-idrossibenzil)-maionato, diottadecil-2- (3-terz-butil-4-idrossi-5-metilbenzil)-maionato, didodecilmercaptoetil-2,2-bis-(3,5-di-terz-butil-4-idrossibenzil)maionato, di-[4-(1,1,3,3-tetrametilbutil)fenil]-2,2-bis-(3,5-di-terzbuti1-4-idrossibenzil )-maionato.
1.9. Composti idrossibenzil-aromatici, per esempio 1.3.5-tris (3,5-di-terz-butil-4-idrossibenzil)-2,4,6-trimetilbenzene, 1,4-bis(3,5-di-terz-butil-4-idrossibenzil)-2,3,5,6-tetrametilbenzene, 2,4,6-tris(3,5-diterz-buti1-4-idrossibenzil) -fenolo.
1 .10. Composti triazinici, per esempio 2, 4-bisottilmercapto-6- ( 3, 5-dì-terz-butil-4-idrossianilino) -1. 3. 5-triazina, 2-ottilmercapto-4 , 6-bis (3, 5-di-terz . -butil4-idrossianilino) -1, 3, 5-triazina, 2-ottilmercapto-4,6-bis (3,5-di-terz-butil-4-idrossifenossi)-1,3,5-triazina, 2,4,6-tris(3,5-di-terz-butil-4-idrossifenossi)-1,2,3-triazina, 1,3,5-tris(3,5-diterz-butil-4-idrossibenzil) isocianurato, 1,3,5-tris-(4-terz-butil-3-idrossi-2,6-dimetilbenzil)isocianurato, 2,4,6-tris(3,5-di-terz-butil-4-idrossifeniletil)-1,3,5-triazina, 1,3,5-tris(3,5-di-terz-butil-4-idrossifenilpropionil)esaidro-1 ,3,5-triazina, 1,3,5-tris (3,5-dicicloesil-4-idrossibenzil)isocianurato.
1.11. Benzilfosfonati, per esempio dimetil-2,5-diterz-butil-4-idrossibenzilfosfonato, dietil-3,5-diterz-butil-4-idrossibenzilfosfonato, diottadecil-3,5-di-terz-butil-4-idrossibenzilfosfonato, diottadecil-5-terz-butil-4-idrossi-3-metilbenzilfosfonato, sale di calcio del monoetilestere dell'acido 3,5-di-terzbutil-4-idrossibenzil fosfonico.
1.12. Acilamininofenoli, per esempio 4-idrossilauranilide, 4-idrossistearanilide, ottil N-(3,5-diterz-butil-4-idrossifenil) carbammato. ^
1.13 Esteri dell'acido β-(3,5-di-tert.butil-4-idrossifenil)-propionico con alcoli monoossidrilici oppure poliossidrilici, come per esempio con metanolo, etanolo, n-ottanolo, i-ottanolo, ottadecanolo, 1,6-esandiolo, 1,9-nonandiolo, etilenglicol, 1,2-propandiolo, neopentilglicol, tiodietilenglicol, dietileneglicol, trietileneglicol, pentaeritritolo, tris(idrossietil)isocianurato, N,N'-bis{idrossietil)-ossammide, 3-tiaundecanolo, 3-tiapentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetii-lfosfa-2,6,7-triossabiciclo [2.2.2]ottano.
1.14. Esteri dell'acido β-(5-tert.butil-4-idrossi-3-metilfenil)propionico con alcoli monoossidrilici oppure poliossidrilici, come per esempio con metanolo, etanolo, n-ottanolo, i-ottanolo, ottadecanolo, 1,6-esandiolo, 1,9-nonandiolo, etilenglicol, 1,2-propandiolo, neopentilglicol, tiodietileneglicol, dietilenglicol, trietileneglicol, pentaeritritolo, tris (idrossietil)isocianurato, Ν,Ν'-bis(idrossietil)-ossammide, 3-tiaundecanolo, 3-tiapentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetil-lfosfa-2, 6,7-triossabiciclo[2.2.2]ottano.
1.15. Esteri dell'acido β-(3,5-dicicloesil-4-idrossifenil )propionico con alcoli monoossidrilici oppure poliossidrilici, come per esempio con metanolo, etanolo, ottanolo, ottadecanolo, 1,6-esandiolo, 1,9-nonandiolo, etilenglicol, 1,2-propandiolo, neopentilglicol, tiodietilenglicol, dietilenglicol, trietilenglicol, pentaeritritolo, tris-(idrossietil)-isocianurato, Ν,Ν'-bis-(idrossietil)-ossammide, 3-tiaundecanolo, 3-tiapentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetil-l-fosfa-2,6,7-triossabiciclo [2.2.2]ottano.
1.16. Esteri dell'acido 3,5-di-ter2-butil-4-idrossifenilacetico con alcoli monoossidrilici oppure poliossidrilici come per esempio con metanolo, etanolo, ottanolo, ottadecanolo, 1, 6-esandiolo, 1,9-nonandiolo, etilenglicol, 1,2-propandiolo, neopentilglicol, tiodietilenglicol, dietilenglicol, trietilenglicol, pentaeritritolo, tris-(idrossietil)-isocianurato, N,N'-bis(idrossietil)ossammide, 3-tiaundecanolo, 3-tiapentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetil-l-fosfa-2,6,7-triossabiciclo [2.2.2]-ottano.
1.17. Ammidi dell'acido β-(3,5-di-tert.butil-4-idrossifenil)propionico come per esempio, Ν,Ν'-bis-(3,5-di-tert-butil-4-idrossifenilpropionil)-esametilenediammide, N,N'-bis-(3,5-di-tert.butilj-4-idrossifenilpropionil)trimetilenediammide, N,N'-bis-(3,5-di-tert.butil-4-idrossifenilpropioni]>)idrazide, N,N *-bis[2(3-[3,5-di-tert.-butil-4-idròssifenil]-propionilossi)etil]ossammide (Naugard® XL-1 della Ditta Uniroyal) .
1.18. Acido ascorbico (vitamina C).
1,19 Antiossidanti amminici, per esempio Ν,Ν'-diisopropil-p-fenilendiammina, Ν,Ν'-di-sec-butil-pfenilendiammina, Ν,Ν'-bis(1,4-dimetilpentil)-pfenilendiammina, N, N'-bis{l-etil-3-metìlpentil)-pfenilendiammina, N,N'-bis{1-metileptil)-p-fenilendiammina, N,N'-dieie loesil-p-fenilendiammina, Ν,Ν'-difenil-p-fenilendiammina, N,N'-di-{nafti1-2)-pfenilendiammina, N-isopropil-N' -fenil-p-fenilendiammina, N- (1,3-dimetilbutil)-N'-fenil-p-fenilendiammina, N- (1-metileptil)-N'-fenil-p-fenilendiammina, N-cicloesil-N'-fenil-p-fenilendiammina, 4-(p-toluensolfammoil)difenilammina, N,N'-dimetil-N,N'-di-sec-butil-p-fenilendiammina, difenilammina, N-allildifenilammina, 4-isopropossidifenilammina, N-fenil-l-naftilammina, N-(4-terz-ottilfenil)-1-naftilammina, N-fenil-2-naftilammina, difenilammina ottilata, per esempio p,p'-di-tert-ottildifenilammina, 4-n-butilamininofenolo, 4-butirrilamminofenolo, 4-nonanoilamminofenolo, 4-dodecanoilamminofenolo, 4-ottadecanoilamminofenolo, di-(4-metossifenil)-ammina, 2,6-di-tert-butil-4-dirìietilamminometilfenolo, 2,4'-diamminodifenilmetano, 4,4'-diamminodìfenilmetano, N,N, N',N'-tetrametil-4,4'-diamminodifenilmetano, 1,2-di-[(2-metilfenil)animino]-etano, 1,2-di-(fenilanimino)-propano, (o-tolil)-biguanide, di [4-(1',3'-dimetil-butil)fenil]ammina, N-fenil-l-naftilammina tert-ottilata, miscela di tertbutil/tert-ottildifenilammine monoalchilate e dialchilate, miscela di nonildifenilammine monoalchilate e dialchilate, miscela di dodecildifenilammine monoalchilate e dialchilate, miscela di isopropil/isoesildifenilammine monoalchilate e dialchilate, miscela di tert-butiIdifenilaminine monoalchilate e dialchilate, 2,3-diidro-3,3-dimetil-4H-l,4-benzotiazina, fenotiazina, miscela di tert-butil/tert.-ottilfenotiazine monoalchilate e dialchilate, miscela di tert.-ottilfenotiazine monoalchilate e dialchilate, N-allilf enotiazina, Ν,Ν,Ν',N'-tetrafeni1-1,4-diamminobut-2-ene, N,N-bis-(2,2,6,6-tetrametilpiperid-4-il) -esametilendiammina, bis-(2,2,6,6-tetrametilpiperid-4-il) -sebacato, 2,2,6,6-tetrametilpiperidin-4-one, 2,2,6,6-tetrametil-piperidin-4-olo.
2. Agenti che assorbono la luce UV ed agenti fotostabilizzanti i 2.1. 2-(2'-idrossifenil)benzotriazoli, per esempio, 2- (2'-idrossi-5'-metilfenil)benzotriazolo,^· 2-(3',5'-di-terz-butil-2' -^-idrossifenil)benzotriazolo, 2—(5'— terz-butil-2'-idrossifenil )benzotriazolo, 2-(2'-idrossi-5'-(1,1,3, 3-tetrametilbutil)fenil]-benzotriazolo, 2-[3',5'-di-terz.butil-2'-idrossifenil)-5-clorobenzotriazolo, 2-(3'-terz-butil-2'-idrossi-5'-metilfenil)-5-clorobenzotriazolo, 2-(3'-sec-butil-5'terz-butil-2'-idrossifenil )benzotriazolo, 2-(2'-idrossi-4'-ottilossif enil)benzotriazolo, 2-(3',5'-diterz-amil-2'-idrossif enil)benzotriazolo, 2-(3',5'-bis (α,α-dimetilbenzil)-2'-idrossifenil)benzotriazolo, 2- (3'-terz-butil-2'-idrossi-5'-(2-ottilossicarboniletil)fenil)-5-clorobenzotriazolo, 2-(3'-terz-butil-5'- [2- (2-etilesilossi)carboniletil]-2'-idrossifenil)-5-clorobenzotriazolo, 2-(3'-terz-butil-2'-idrossi-5'-(2-metossicarboniletil)fenil)-5-clorobenzotriazolo, 2- (3'-terz-butil-2'-idrossi-5'-(2-metossicarboniletil)fenil 1-benzotriazolo, 2-(3'-terz-butil-2'-idrossi-5'- (2-ottilossicarboniletil)fenil)benzotriazolo, 2- (3'-terz-butil-5'-[2-(2-etilesilossi)carboniletilj-2'-idrossifenil) benzotriazolo, 2-(3'-dodecil-2'-idrossi-5'-metilfenil) benzotriazolo, 2-(3'-terzbutil-2'-idrossi-5' -(2-isoottilossicarboniletil)-fenilbenzotriazolo, 2,2'-metilenbis[4-(1,1,3y 3-tetrametilbutil) -6-benzotriazol-2-il-fenolo]; prodotto di transesterificazione di 2-[3'-terz-butil-5'-(2-metossicarboniletil) -2'-idrossifenil]-2H-benzotriazolo con polietilenglicol 300; [R-CH2-CH2-COO-CH2CH2] 2, con R = 3'-terz-butil-4'-idrossi-5'-2H-benzotriazol-2-il-fenile; 2-[2'-idrossi-3'-(et,α-dimetilbenzil)-5’-(1,1,3,3-tetrametilbutil)fenil]benzotriazolo; 2-[2’-idrossi-3 '-(1,1,3,3-tetraraetilbutil)-5'-(α,α-dimetilbenzil)fenil ]benzotriazolo.
2.2. 2-idrossibenzofenoni, per esempio, i 4-idrossi, 4-metossi, 4-ottilossi, 4-decilossi, 4-dodecilossi, 4-benzilossi, 4,2',4'-triidrossi, 2'-idrossi-4,4'-dimetossi-derìvati .
2.3. Esteri di acidi benzoici sostituiti e non sostituiti, per esempio, 4-tert.butilfenilsalicilato, fenilsalicilato, ottilfenilsalicilato, dibenzoilresorcinolo, bis(4-tert.-butilbenzoil)resorcinolo, benzoilresorcinolo, 2,4-di-tert.butilfenil 3,5-ditert .butil-4-idrossibenzoato, esadecil 3,5-ditert .butil-4-idrossibenzoato, ottadecil 3,5-di-tertbutil-4-idrossibenzoato, 2-metil-4,6-di-tertbutilfenil 3,5-di-tert-4-idrossibenzoato.
2.4. Acrilati, per esempio, etil ct-ciano-β,βdifenilacrilato, isoottil a-ciano-β,β-difenilacrilato, metil α-carbometossicinnamato, metil a-ciano-βmetil-p-metossicinnamato, butil a-ciano-p-metil-pmetossicinnamato, metil a-carbometossi-p-metossicinnamato, N-(β-carbometossi-β-cianovinil)-2-metilindolina .
2.5. Composti del nichel, per esempio, complessi con il nichel del 2,2'-tiobis-[4-(l,l,3,3-tetrametilbutil)fenolo];<:>-.<:>come il complesso 1:1 oppure il complesso 1:2, con o senza ulteriori ligandi come nbutilammina, trietanolammina, oppure N-cicloesildietanolammina, dibutilditiocarbammato di nichel, sali di nichel di esteri monoalchilici dell'acido 4-ìdrossi-3,5-di-tert .-butilbenzilfosfonico come dell'estere metilico oppure etilico, complessi del nichel di chetossime, come della 2-idrossi-4-metilfenilundecilchetossima, complessi con il nichel del l-fenil-4-lauroil-5-idrossi-pirazolo con o senza ulteriori legandi.
2.6 Ammine dotate di impedimento sierico, per esempio, bis (2,2,6,6-tetrametil-4-piperidil)sebacato, bis (2,2,6,6-tetrametil-4-piperìdil)succinato, bis-(1,2,2,6,6-pentametil-4-piperidil) sebacato, bis-(1-ottilossi-2,2,6,6-tetrametil-4-piperidil) sebacato, bis(l,2,2,6,6-pentametil-4-piperidil) n-butil-3,5-ditert .butil-4-idrossibenzilmalonato, prodotto di condensazione ottenuto da l-idrossietil-2,2,6,6-tetrametil-4-idrossipiperidina e dall'acido succinico, prodotti di condensazione lineari oVciclici di Ν,Ν'-bis (2,2,6,6-tètrametil-4-piperidil)esametilendiammina e di 4-tert.ottilammino-2,6-dicloro-l,3,5-striazina, tris- (2,2,6,6-tetrametil-4-piperidil)-nitrilotriacetato, tetrakis- (2,2,6,6-tetrametil-4-piperidil)-1,2,3,4-butantetracarbossilato, 1,1'-(1,2-etandiil)-bis (3,3,5,5-tetrametilpiperazinone), 4benzoil-2,2,6, 6-tetrametilpiperidina, 4-stearilossi-2.2.6.6-tetrametilpiperidina, bis-(l,2,2,6,6-pentametilpiperidil)-2-n-butil-2- (2-idrossi-3,5-di-terz.-butilbenzil )maionato, 3-n-ottil-7,7,9,9-tetrametil-1,3,8-triazaspiro [4.5]decan-2,4-dione, bis-{1-ottilossi-2,2,6,6-tetrametilpiperidil) sebacato, bis-(1-ottilossi-2,2,6, 6-tetrametilpiperidil)succinato, prodotti di condensazione lineari o ciclici di Ν,Ν'-bis-(2,2,6,6-tetrametil-4-piperidil)esametilendiammina e 4-morfolino-2,6-dicloro-l, 3,5-triazina, prodotto di condensazione di 2-cloro-4,6-bis-(4-n-butilammino-2.2.6.6-tetrametilpiperidil) -1,3,5-triazina e di 1,2-bis- (3-amminopropìlaimnino)etano, prodotto di condensazione di 2-cloro-4,6-di-(4-n-butilammino-l,2,2,6,6-pentametilpiperidil)-1, 3,5-triazina e di l,2-bis-(3-amminopropilaminino)etano, 8-acetil-3-dodecil-7,7,9,9-tetrametil-1,3,8-triazaspiro (4.5]decan-2,4-dione, .3-dodecil-1- (2,2,6,6-tetrametil-4-piperidil)pirrolidin-2,5-dione, 3-dodecil-l-(1,2,2,6,6-pèntametil-4-piperidil)-pirrolidin-2, 5-dione, miscela di 4-esadecilossi- e 4-stearilossi-2,2,6,6-tetrametilpiperidina, prodotto di condensazione di Ν,Ν'-bis (2,2,6,6-tetrametil-4-piperidil)esametilendiammina e di 4-cicloesilammino—2,6-dicloro-l,3,5-triazina, prodotto di condensazione di l,2-bis-(3amminopropilammino )etano e di 2,4,6-tricloro-l,3,5-triazina, e anche di 4-butilammino-2,2,6,6-tetrametilpiperidina (CAS NO. di registrazione [136504-96-6]) ; N-(2,2,6,6-tetrametil-4-piperidil)ndodecilsucciniimnide, N-{1,2,2,6,6-pentametil-4-piperidil)n-dodecilsuccinimmide, 2-undecil-7,7,9,9-tetrametil-l-ossa-3, 8-diaza-4-ossospiro[4.5]decano, prodotto dì reazione di 7,7,9,9-tetrametil-2-cicloundecil-l-ossa-3, 8-diaza-4-ossospiro[4.5]decano e di epìcloroidrina, 1,1-bis(1,2,2,6,6-pentametil-4-piperidilossicarbonil )-2-(4-metossifenil)etene, Ν,Ν'-bis-formil-N,N'-bis (2,2,6,6-tetrametil-4-piperidil)-esametilendiammina, diestere dell'acido 4-metossimetilenmalonico con 1,2,2,6,6-pentametil-4-idrossìpiperidina, poli[metilpropil-3-ossi-4-{2,2,6,6-tetrametil-4-piperidil) ]silossano, prodotto di reazione ottenuto da un copolimero anidride maleica/a-olefina e da 2,2,6,6-tetrametil-4-amminopiperidina oppure 1,2,2,6,6-pentametil-4-anuninopiperidina. ^
2.1. Ossammidi, per esempio, 4, 4' -diottilossiossanilide, 2, 2' -dietossiossanilide, 2,2'-diottilossi-5,5'-di-tert .butossanilide, 2,2'-didodecilossi-5,5'-di-tert .butossanilide, 2-etossi -2' -etilossanilidé/i" N, N' -bis- ( 3-dimetilainminopropil ) -ossammide, 2-etossi-5-tert.-butil-2' -etossanilide e una sua miscela con 2-etossi-2'-etil-5,4'-ditert .butossanilide, miscele di ossanilidi o- e p-metossi-disostituite e anche di ossanilidi o- e petossi-disostituite .
2.8. 2-(2-idrossifenil)-1,3, 5-triazine, per esempio 2.4.6-tris (2-idrossi-4-ottilossifenil)-1,3,5-triazina, 2-(2-idrossi-4-ottilossifenil)-4,6-bis(2,4-dimetilfenil)-1,3,5-triazina, 2-(2,4-diidrossifenil)-4.6-bis (2,4-dimetìlfenil)-1,3,5-triazina, 2,4-bis-(2-idrossi-4-propilossif enil)-6-(2,4-dimetilfenil)-1,3,5-triazina, 2-(2-idrossi-4-ottilossifenil)-4,6-bis (4-metilfenil)-1,3,5-triazina, 2-(2-idrossi-4-dodecìlossifenil)-4, 6-bis(2,4-dimetilfenil)-1,3,5-triazina, 2- (2-idrossi-4-tridecilossifenil)-4,6-bis (2,4-dimetilfenil)-1,3,5-triazina, 2-[2-idrossi-4-(2-idrossi~3-butilossipropossi)fenil]-4,6-bis(2,4-dimetilfenil)-1,3,5-triazina, 2-[2-idrossi-4-J2-idrossi-3-ottilossipropilossi )fenil]-4,6-bis(2,4-dimetilfenil)-1,3,5-triazina, 2-[4-dodedilossi/tridecilossi-2-idrossipropossi) -2-idrossifenil]-4,6-bis (2,4-dimetilfenil)-1,3,5-triazina, 2-[2-idrossi-4-(2-idrossi-3-dodecilossipropossi)fenil]-4,6-bis(2,4-dimetilfenil)-1,3,5-triazina, 2-(2-idrossi-4-esilossi)fenil-4,6-difenil-l,3,5-triazina, 2-(2-idrossi-4-metossifenil)-4,6-difenil-l,3, 5-triazina, 2,4,6tris [2-idrossi-4-(3-butossi-2-ìdrossipropossi)fenil]-1,3,5-triazina, 2-(2-idrossifenil)-4- (4-metossifenil)-6-fenil-l,3,5-triazina, 2-{2-idrossi-4- [3—(2— etilesil-l-ossi)-2-idrossipropilossi]fenil}-4,6-bis-(2,4-dimetilfenil)-1,3,5-triazina.
3. Disattivatori di metalli, per esempio, Ν,Ν'-difenilossammide, N-salicilal-N'-saliciloil-idrazina, N, N'-bis-(saliciloil)-idrazina, Ν,Ν'-bis- (3,5-ditert.butil-4-idrossifenilpropionil)-idrazina, 3-saliciloilammino-1,2,4-triazolo, bis- (benziliden)-<’>ossalil-diidrazide, ossanilide, isoftaloil-diidrazide, sebacoil-bisfenilidrazide, N,N'-diacetiladipoildiidrazide, N,N'-bis(saliciloil)ossalil-diidrazide, N, N'-bis(saliciloil)tiodipropionil-diidrazide.
4. Fosfiti e fosfoniti, per esempio, trifenilfosfito, difenil-alchil-fosfiti, fenil-dialchil-fosfiti, tris-(nonilfenil)-fosfito, trilaurilfosfito, triottadecilfosfito, distearil-pentaeritritoldifosfito, tris-(2,4-di-tert.butilfenil)-fosfito, diisodeàilpentaeritritol-difosfito, bis-(2,4-di-tert.butilfenil)-pentaeritritol-difosfito, bis-(2,6-di-terz-butil-4-metilfenil) -pentaeritritol-difosfito, diisodecilossipentaeritritol-difosf ito, bis-(2,4-di-terz-butil-6-r- metilfenil)-pentaeritritol-difosfito, bis-(2,4,6-triterz-butiìfenil)-pentaeritritol-difosfito, tristearìl-sorbitol- trifosfito tetrakis- (2 , 4-di-tert . -butilfenil )-4,4'-bifenilen-difosfonito, 6-isoottilossi-2,4,8, 10-tetra-terz-butil-12H-dibenzo[d,g]-1,3, 2-diossafosfocina, 6-fluoro-2,4,8,10-tetra-terzbutil-12-metil-dibenzo [d,g]-1,3,2-diossafosfocina, bis- (2,4-di-tert-butil-6-metilfenil)-metil-fosfito, bis- (2,4-di-tert-butil-6-metilfenil)-etil-fosfito, 2,2', 2 "-nitrilo[trietil-tris(3,3',5,5'-tetra-tertbutil-1, 1'-bifenil-2,2<r>-diil)fosfito, 2-etilesil-(3,3’,5,5'-tetra-tert.butil-1,1'-bifenil-2,2'-diil)-fosfito.
Particolarmente preferiti sono i seguenti fosfiti: tris (2,4-di-tert-butilfenil)fosfito, (Irgafos® 168, Ciba-Geigy) , tris(nonilfenil)fosfito,
2
5. Idrossilammine, per esempio N,N-di-benzilidrossilammina, N,N-dietilidrossilammina, N,N-diottilidrossilammina, N,N-dilaurilidrossilammina, N,N-ditetradecilidrossilammina, N,N-diesadecilidrossilammina, N, N-diottadecilidrossilammina, N-esadecil-N-ottadecilidrossilammina, N-eptadecil-N-ottadecilidrossilammina, N,N-dialchilidrossilanunina ottenuta da ammine grasse del sego idrogenate.
6, Nitroni, per esempio N-benzil-alfa-fenil-nitrone, N-etil-alfa-metil-nitrone, N-ottil-alfa-eptilnitrone, N-lauril-alfa-undecil-nitrone, N-tetradecilalfa-tridecil-nitrone, N-esadecil-alfa-pentadecilnitrone, N-ottadecil-alf a-eptadecil-nitrone, N-esadecil-alfa-eptadecil-nitrone, N-ottadecil-alfapentadecil-nitrone, N-eptadecil-alfa-eptadecilnitrone, N-ottadecil-alf a-esadecil-nitrone, nitroni derivati da N,N-dialchilidrossiiammine preparate da ammine grasse del sego idrogenate.
7. Composti tiosinerqici, per esempio dilauril tiodipropionato, oppure distearil-tiodipropionato.
8. Composti che distruggono i perossidi, per esempio esteri dell'acido β-tiodipropionico, per esempio l'estere laurilico, stearilico, miristilico oppure tridecilico, mercaptobenzimmidazolo, il sale di zinco del 2-mercaptobenzimmidazolo, dibutilditiocarbammato di zinco, diottadecildisolfuro, pentaeritritoltetrakis (β-dodecilmercapto)propionato.
9. Agenti co-stabilizzanti basici, per esempio melammina, polivinilpirrolidone, diciandiammide, triallilcianurato, derivati dell'urea, derivati della idrazina, ammine, poliammidi, poliuretani, sali di metalli alcalini e di metalli alcalino-terrosi di acidi grassi superiori, per esempio stearato di calcio, stearato di zinco, beenato di magnesio, stearato di magnesio, ricinoleato di sodio, palmitato di potassio, pirocatechinato di antimonio oppure pirocatechinato di stagno.
10. Agenti di nucleazione, per esempio sostanze inorganiche, per esempio talco, ossidi di metalli come biossido di titanio oppure ossido di magnesio, fosfati, carbonati oppure solfati, preferibilmente di metalli alcalino-terrosi; composti organici come acidi monocarbossilici oppure policarbossilici e anche loro sali come per esempio acido 4-tert-butilbenzoico, acido adipico, acido difenilacetico, succinato di sodio oppure benzoato di sodio; composti polimeri come per esempio copolimeri ionici ("ionomeri").
11. Cariche e agenti di rinforzo, per esempio carbonato di calcio, silicati, fibre di vetro, sfere di vetro, amianto, talco, caolino, mica, solfato di bario, ossidi e idrossidi di metalli, nero-fumo, grafite, segatura e polveri oppure fibre di altri prodotti naturali, fibre sintetiche.
12. Ulteriori additivi, per esempio plastificanti, lubrificanti, emulsionanti, pigmenti, additivi reologici, catalizzatori, agenti di controllo dello scorrimento, agenti sbiancanti ottici, agenti di protezione nei confronti della fiamma, agenti '‘antistatici e propellenti.
13. Benzofuranoni oppure indolinoni, per esempio quelli descritti in US-A-4.325.863, US-A-4.338.244, US-A-5.175.312, US-A-5.216.052, US-A-5.252.643, DE-A-4.316.611, DE-A-4.316.622, DE-A-4.316.876, EP-A-0.589.839 oppure EP-A-0.591.102, oppure 3—[4—(2— acetossietossi)fenil] -5,7-di-tert-butiì-benzofuran-2-one, 5,7-di-tert-butìl-3- [4-(2-stearoilossietossi)-fenil]-benzofuran-2-one, 3,3'-bis[5,7-di-tert-butil-3- (4-[2-idrossietossi]fenil)benzofuran-2-one], 5,7-di-tert-butil-3- (4-etossifenil)benzofuran-2-one, 3-(4-acetossi-3,5-dimetilfenil) -5,7-di-tert-butil-benzofuran-2-one, 3-(3,5-dimetil-4-pivaloilossi-fenil)-5,7-di-tert-butil-benzofuran-2-one, 3-(3,4-dimetilfenil)-5,7-di-tert-butil-benzofuran-2-one, 3-(2,3-dimetilfenil)-5,7-di- tert-butil-benzofuran-2-one.
Gli agenti co-stabilizzanti, con eccezione dei benzofuranoni elencati sotto il paragrafo 13, vengono aggiunti in concentrazioni, per esempio di 0,01 fino a 10%, riferito al peso totale della poliammide, del poliestere oppure del poliacetale da stabilizzare.
Altre composizioni preferite comprendono ulteriori additivi oltre ai componenti (a) e (b) in particolare antiossidanti fenolici, fotostabilizzanti o/e agenti stabilizzanti della lavorazione.
Additivi particolarmente preferiti sono antiossidanti fenolici (paragrafo 1 dell'elenco), ammine che presentano impedimenti sterici (paragrafo 2.6 dell'elenco), fosfiti e fosfoniti (paragrafo 4 dell’elenco), e sostanze che fissano<">.';' perossidi (paragrafo 8 dell'elenco).
Composizioni di particolare interesse sono quelle che comprendono, oltre ai componenti (a) e (b), come ulteriore additivo, almeno un composto del tipo dei fosfiti organici oppure dei fosfoniti organici (paragrafo 4 dell'elenco).
Altri ulteriori additivi preferiti (stabilizzanti) sono benzofuran-2-oni, per esempio quelli descritti, fra l'altro in U.S. 4.325.863; U.S.
4.338.244; U.S. 5.175.312; U.S. 5.216.052; U.S.
5.252.643; DE-A-4 316 611; DE-A-4316 622, DE-A-4316 876, EP-A-0589 839 oppure EP-A-0591 102.
Esempi di tali benzofuran-2-oni sono composti di formula
in cui
R'n è un sistema ad anelli aromatici carbociclico oppure eterociclico non sostituito oppure ^sostituito; R'12 è idrogeno: ì · R'i4 è idrogeno, alchile avente da 1 a 12 atomi di carbonio, ciclopentile, cicloesile oppure cloro;
R'13 ha il significato di R'I2 oppure di R'n oppure è
un radicale di formula
oppure -D-E,
in cui
R'i6 è idrogeno, alchile avente 1 fino a 18 atomi di carbonio; alchile avente 2 fino a 18 atomi di carbonio, che è interrotto da ossigeno oppure zolfo, dialchilamminoalchile contenente in totale 3 fino a 16 atomi di carbonio, ciclopentile, cicloesile, fenile, oppure fenile che è sostituito con 1 fino a 3 radicali alchilici contenenti, insieme, non più di 18 atomi di carbonio;
s è 0, 1 oppure 2;
i sostituenti R'I7 sono, ciascuno indipendentemente l'uno dall'altro, idrogeno, alchile avente 1 fino a 18 atomi di carbonio, ciclopentile, cicloesile, fenile, fenile che è sostituito con 1 oppure 2 radicali alchilici contenenti, insieme, non più di 16 atomi di carbonio, un radicale di formula -C2H40H,
0 oppure, insieme
con l'atomo di azoto di legame, formano un radicale della piperidina oppure un radicale della morfolina; t è i fino a 18;
R'2o è idrogeno, alchile avente 1 fino a 22 atomi di carbonio oppure cicloalchile avente 5 fino a 12 atomi di carbonio;
A è alchilene avente 2 fino a 22 atomi di carbonio, che può essere interrotto da azoto, ossigeno oppure zolfo;
R '18 è idrogeno, alchile avente 1 fino a 18 atomi di carbonio, ciclopentile, cicloesile, fenile; fenile oppure benzile che è sostituito con 1 oppure 2 radicali alchilici contenenti, insieme, non più di 16 atomi di carbonio;
R'ig è alchile avente 1 fino a 18 atomi di carbonio; D è -0-, -S-, -SO-, -SO2- oppure -C(R'2I)2-;
i sostituenti R'21 sono, ciascuno indipendentemente dall'altro idrogeno oppure Ci-C16alchile, i due R'21 contenendo, insieme, 1 fino a 16 atomi di carbonio, R'21 inoltre essendo fenile!oppure un radicale di
in cui s, R<1 >le e R'i7 hanno i significati indicati sopra;
E è un radicale di formula
in cui R'n, R'12 e R'n hanno i significati indicati sopra; e
R'is è idrogeno, alchile avente 1 fino a 20 atomi di carbonio, ciclopentile, cicloesile, cloro oppure un radicale di formula
R'17 hanno i significati indicati sopra, oppure R<T>iS insieme con R<f>n, è un radicale tetrametilene. Si preferiscono quei benzofuran-2-oni, nei quali R'13 è idrogeno, alchile avente 1 fino a 12 atomi di carbonio, ciclopentile, cicloesile, cloro oppure un radi-
cale di formula —
oppure -D-E, in cui s, R'I6, R'x?, D e E hanno i si-\ gnificati indicati sopra, R'16 preferibilmente essendo idrogeno, alchile avente 1 fino a 18 atomi di carbonio, ciclopentile oppure cicloesile.
Altri benzofuran-2-oni preferiti sono quelli nei quali R'n è fenile oppure fenile che è sostituito con 1 oppure 2 radicali alchilici contenenti, insieme, non più di 12 atomi di carbonio, R'12 è idrogeno; R'n è idrogeno oppure alchile avente 1 fino a 12 atomi di carbonio;
R'13 è idrogeno, alchile avente 1 fino a 12 atomi di
carbonio, oppure -D-E; R'is è idrogeno, alchile avente 1 fino a 20 atomi di carbonio,
oppure R'15, insieme con R’n, è un radicale tetrametilene, s, R'i6, R'i7, D e E avendo i significati indicati al-1'inizio.
Benzofuran-2-oni particolarmente interessanti sono anche quelli nei quali R'I3 è idrogeno, alchile avente da 1 a 12 atomi di carbonio, oppure -D-E; R'I2 e R'i« sono ciascuno indipendentemente dall'altro idrogeno oppure alchile avente 1 fino a 4 atomi di carbonio; e R'I6 è alchile avente 1 fino a 20 atomi di carbonio, D e E avendo i significati indicati all inizio.
Particolarmente interessanti, da ultimo, sono anche quei benzofuran-2-oni, nei quali R'13 è alchile avente 1 fino a 4 atomi di carbonio oppure -D-E; R'u e R'i4 sono idrogeno; e R'iS è alchile avente 1 fino a 4 atomi di carbonio, ciclopentile oppure cicloesile, D essendo un gruppo -C(R'2i)2- e E essendo un radicale di formula
i sostituenti R'2I sono identici oppure differenti e sono, ciascuno, alchile avente 1 fino a 4 atomi di carbonio, e R'n, R'12, R'i* e R'is hanno i significati indicati .
La quantità di benzof uran-2-oni ulteriormente aggiunta può variare entro ampi limiti e detti composti possono essere presenti nelle composizioni della presente invenzione in quantità comprese per esempio tra 0,0001 e 5% in peso, preferibilmente tra 0,001 e 2%<‘ >in peso, più preferibilmente tra 0,01 e 2% in peso.
L'incorporazione del componente (b) e di eventuali ulteriori additivi nel componente y..(a) [poliammide, poliestere oppure poliacetale] viene effettuata adottando metodi noti, per esempio prima oppure dopo stampaggio, oppure anche applicando il componente {b), sciolto oppure disperso, al componente (a), con oppure senza successiva evaporazione del solvente. Il componente (b) può anche venire aggiunto ai prodotti da stabilizzare [componente (a)] sotto forma di una mescola-madre che contiene questi componenti in una concentrazione, per esempio di 2,5-25%. Il componente (b) può anche venire aggiunto prima oppure durante la polimerizzazione oppure prima della reticolazione.
Il componente (b) può venire incorporato nel componente (a) da stabilizzare in forma pura oppure incapsulato in cere, oli oppure in polimeri.
Il componente (b) può anche venire applicato a spruzzo sul componente (a) da stabilizzare. Esso può diluire altri additivi (per esempio gli additivi tradizionali indicati sopra), oppure loro masse fuse in modo che esso può venire applicato a spruzzo, anche insieme con questi additivi, sul componente (a) da stabilizzare. Un’aggiunta mediante applicazione a spruzzo durante la disattivazione dei catalizzatori di polimerizzazione è particolarmente vantaggiosa, essendo possibile effettuare l'applicazione a spruzzo usando, per esempio, il vapore acqueo usato per la disattivazione.
Le poliammidi, i poliesteri oppure i poliacetali così stabilizzati possono venire usati in un intervallo di forme molto ampio che comprende, tipicamente, pellicole, fibre, filamenti, articoli stampati, profili oppure possono venire usati come leganti per sistemi di vernici, in particolare composizioni di rivestimento sotto forma di polveri, adesivi oppure mastici. Il componente (b) è particolarmente adatto per l'impiego come stabilizzante della lavorazione (termostabilizzante). Per questo scopo, esso viene aggiunto, utilmente al componente (a) prima oppure durante la lavorazione.
Pertanto, una forma di realizzazione preferita della presente invenzione è l'impiego del componente (b) come stabilizzante in particolare come stabilizzante della lavorazione (termostabilizzante) per stabilizzare poliammidi, poliesteri oppure poliacetali contro una degradazione ossidativa, termica e/o fotoindotta .
Il componente (b) si distingue per il suo vantaggioso comportamento nei confronti dei colori, ossia, un lieve scolorimento delle poliammidi, dei poliesteri e dei poliacetali durante la lavorazione. Pertanto, la presente invenzione riguarda inoltre un procedimento per stabilizzare una poliamimide, un poliestere oppure un poliacetale nei confronti di una degradazione ossidativa, termica e/o foto-indotta, detto procedimento consistendo nell'incorporare in detto materiale oppure applicare a detto materiale almeno un componente (b).
Gli esempi che seguono illustrano più dettagliatamente la presente invenzione. Parti e percentuali sono in peso.
Esempio 1: Stabilizzazione della poliammide 12
100 parti di granuli di poliammide 12 non stabilizzata (Grilamid® L 20, di EMS, Svizzera) vengono polverizzate mediante macinazione criogenica e vengono mescolati con gli stabilizzanti elencati nella tabella 1. Questa miscela viene trattata in un miscelatore Henschel per 2 minuti a 7Q°C. La polvere così ottenuta viene quindi essiccata a 80°C per 6 ore e quindi, viene sottoposta ad estrusione in un apparecchio di estrusione a doppia vite (tipo Berstorff) ad una temperatura massima di 210°C e quindi viene granulata. I granuli ottenuti vengono sottoposti a stampaggio mediante iniezione in un apparecchio per stampaggio ad iniezione (tipo Engel) ad una temperatura massima di 220°C ottenendo così provini lineari aventi uno spessore di 1,0 mm ed una lunghezza di 67 mm. Si determina 1*indice di giallo (YI) dì questi provini lineari secondo ASTM D 1925-70. Valori di YI bassi indicano uno scarso scolorimento, valori di YI elevati indicano un notevole scolorimento dei campioni. Quanto minore è lo scolorimento, tanto più efficace è lo stabilizzante o la miscela di stabilizzanti. I risultati sono riportati nella tabella 1.
Tabella 1:
a) Esempio di confronto
\
b) Esempio della presente invenzione
c) Irganox® 245 (Ciba Spezialitàtenchemie AG) indica un composto di formula AO-1
d) Irganox® 1098 (Ciba Spezialitatenchemie AG) indica un composto di formula AO-2
f) Irgafos® 168 (Ciba Spezialitatenchemie AG) indica tris(2,4-di-tert-butilfenil)fosfito
g) Irgafos® 12 (Ciba Spezialitàtenchemie AG) indica 2,2',2"-nitrilo[trietil-tris (3,3’,5,5<1>-tetra-tert-. butil-1,1'-bifenil-2,2'-diil)fosfito]; numero di registro del Chemical Abstract: 80410-33-9 è rappresenta il composto di formula B.
Esempio 2: Stabilizzazione della poliammide 6.
Si polverizzano 100 parti di granuli di poliammide 6 non stabilizzata (Ultramid® B3S, della BASF) mediante macinazione criogenica e si mescolano con gli stabilizzanti elencati nella tabella 2. Quindi, si tratta questa miscela in un miscelatore Henschel per 2 minuti a 70°C. La polvere ottenuta viene quindi essiccata a 80°C per 6 ore e viene sottoposta ad estrusione in un estrusore a doppia vite (tipo Berstorff) ad una temperatura massima di 240°C e viene quindi granulata. I granuli ottenuti vengono sottoposti a stampaggio mediante iniezione in un apparecchio per stampaggio ad iniezione ad una temperatura massima di 240°C ottenendo così piccoli provini a forma di bacchette aventi uno spessore di 4 x 6 mm ed una lunghezza di 50 mm. Queste bacchette vengono sottoposte ad invecchiamento in un forno ad aria circolante a 150°C. Si misura, espresso in ore, il tempo necessario affinché la resistenza agli urti delire bacchette scenda a 80 KJ/m<2>. Quanto più lungo è detto tempo, tanto migliore è la stabilizzazione. I risultati sono riportati nella tabella 2.
Tabella 2: Resistenza agli urti in una prova di invecchiamento in forno a 150°C
Vedi parte finale della tabella 1 per la descrizione delle note a) fino ad e).
Esempio 3: Stabilizzazione del copolimero di poìiossimetilene (POM)
Si mescolano 100 parti di copolimero POM non stabilizzato (Hostaform®C/ Hoechst) con 0*3% di stearato di calcio e con gli stabilizzanti elencati nelle tabelle 3* 4 e 5. La polvere viene quindi sottoposta ad estrusione ad una temperatura massima di 190°C. Una parte di questi granuli viene sottoposta a stampaggio mediante iniezione in un apparecchio per stampaggio ad iniezione ad una temperatura massima di 200°C ottenendo placchette aventi uno spessore di 2 mm* una larghezza di 40 mm ed una lunghezza di 60 miti. L'altra parte dei granuli viene sottoposta a stampaggio mediante iniezione in un apparecchio per stampaggio ad iniezione ad una temperatura massima di 200°C ottenendo piccole bacchette aventi uno spessore di 4 x 6 min ed una lunghezza di 50 mm.
Si effettua una misurazione termogravimetrica in condizioni isotermiche, su una parte di queste placchette sotto un flusso di aria a 220°C. Si misura, in minuti, il tempo durante il quale le placchette perdono 3%, 6% e 10% del loro peso. Quanto più lungo è detto tempo, tanto migliore è la stabilizzazione. I risultati sono riportati nella tabella 3.
Tabella 3: Misurazione termogravimetrica a 220°C
Vedi parte terminale della tabella 1 per la spiegazione delle note a) fino a e).
Si effettua una prova di invecchiamento in forno su un'altra parte delle placchette a 140°b. Le placchette vengon<'>o<' >sottoposte ad invecchiamento in un forno ad aria circolante a 140°C e si misura, in ore, il tempo fino a che le placchette perdono 2% del loro peso. Quanto più lungo è detto tempo, tanto migliore è la stabilizzazione. I risultati sono riportati nella tabella 4.
Tabella 4 : Perdita in peso in una prova di invecchiamento in forno a 140°C
Vedere l'estremità della tabella 1 per la spiegazione delle note di fondo a) fino a e).
I tondini aventi uno spessore di 4 x 6 irai ed una lunghezza di 50 mm vengono sottoposti anche ad una prova di invecchiamento in un forno ad aria circolante a 140°C, misurando il tempo in ore fino a che la resistenza agli urti dei tondini è diminuita dal valore originale di 110 KJ/m<2 >fino a 90 KJ/m<2>. Quanto più lungo è il tempo, tanto migliore è la stabilizzazione. I risultati sono riassunti nella tabella 5.
Tabella 5: Resistenza agli urti nella prova di invécchiamento in forno a 140°C
Vedere l'estremità della tabella 1 per la spiegazione delle note di fondo a) fino a e).
Claims (11)
- RIVENDICAZIONI 1. Una composizione che comprende a)una poliammide, un poliestere o un poliacetale che è soggetto ad una degradazione ossidativa, termica o fotoindotta, e b)il composto di formula Icon la condizione che, se il componente (a) è una poliammide, allora la composizione non contiene un ìpofosfito di un metallo e non contiene un sale di rame di un acido organico.
- 2. Una composizione secondo la rivendicazione 1, in cui la poliammide è poliammide 6, poliammide 6.6, poliammide 4.6, poliammide 11 o poliammide 12 o un loro copolimero.
- 3. Una composizione secondo la rivendicazione 1, in cui il poliestere è PET, PETG oppure PBT, o un loro copolimero.
- 4. Una composizione secondo la rivendicazione 1, in cui il poliacetale è un omopolimero oppure un copolimero.
- 5. Una composizione secondo la rivendicazione 1, in cui il componente (b) è presente in una quantità compresa tra 0,01 e 1%, riferito al peso del componente (a).
- 6. Una composizione secondo la rivendicazione 1, che oltre ai componenti (a) e (b) contiene inoltre ulteriori additivi .
- 7. Una composizione secondo la rivendicazione 6, in cui gli ulteriori additivi sono antiossidanti fenolici, stabilizzanti nei confronti della luce e/o agenti stabilizzanti della lavorazione.
- 8. Una composizione secondo la rivendicazione 6, in cui l'ulteriore additivo è almeno un composto del tipo di un fosfito oppure fosfonito organico.
- 9. Una composizione secondo la rivendicazione 6, in cui l’ulteriore additivo è almeno un composto del tipo dei benzofuran-2-oni.
- 10. Un procedimento per stabilizzare una poliammide, un poliestere oppure un poliacetale contro una degradazione ossidativa, termica e/o provocata dalla luce, il quale consiste nell'incorporare in detti materiali oppure nell'applicare a detti materiale almeno un componente (b) secondo la rivendicazione 1.
- 11. Impiego di un componente (b) secondo la rivendicazione 1, come agente stabilizzante per proteggere poliammidi, poliestere o poliacetali contro una degrada zione ossidativa, termica e/o provocata dalla luce.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH282097 | 1997-12-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ITMI982622A1 true ITMI982622A1 (it) | 2000-06-03 |
| IT1303818B1 IT1303818B1 (it) | 2001-02-23 |
Family
ID=4242328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT1998MI002622A IT1303818B1 (it) | 1997-12-05 | 1998-12-03 | Stabilizzazione di poliammide, poliestere e poliacetale. |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPH11269374A (it) |
| KR (1) | KR19990062799A (it) |
| AR (1) | AR017194A1 (it) |
| BE (1) | BE1013420A5 (it) |
| BR (1) | BR9805298A (it) |
| CA (1) | CA2255172A1 (it) |
| DE (1) | DE19855598A1 (it) |
| ES (1) | ES2155760B1 (it) |
| FR (1) | FR2772036A1 (it) |
| GB (1) | GB2331991B (it) |
| IT (1) | IT1303818B1 (it) |
| NL (1) | NL1010729C2 (it) |
| RU (1) | RU2210578C2 (it) |
| SG (1) | SG68701A1 (it) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE297799T1 (de) * | 2000-06-03 | 2005-07-15 | Membrana Gmbh | Polyamidmembran mit erhöhter hydrolysestabilität und verfahren zu ihrer herstellung |
| CN101977949A (zh) * | 2008-03-28 | 2011-02-16 | 巴斯夫公司 | 用于塑料扎带的聚合物组合物 |
| EP2406320A1 (en) * | 2009-03-13 | 2012-01-18 | Basf Se | Stabilized blends of polyester and polyamide |
| ES2621970T3 (es) * | 2009-05-28 | 2017-07-05 | Mitsubishi Gas Chemical Company, Inc. | Composición de resina de poliamida y artículo moldeado |
| JP5708487B2 (ja) * | 2009-06-08 | 2015-04-30 | 三菱瓦斯化学株式会社 | ポリアミド樹脂組成物及び成形品 |
| WO2011052563A1 (ja) | 2009-10-28 | 2011-05-05 | 帝人デュポンフィルム株式会社 | 電気絶縁用二軸配向フィルムおよび電気絶縁用二軸配向フィルムを用いてなるフィルムコンデンサー |
| KR102189978B1 (ko) * | 2013-06-13 | 2020-12-11 | 주식회사 쿠라레 | 폴리아미드 수지 조성물 및 그것으로 이루어지는 성형품 |
| TWI488911B (zh) * | 2014-04-18 | 2015-06-21 | Fdc Lees Chemical Industry Co | 用於聚甲醛之無三聚氰胺複合式添加劑 |
| EP3431520B1 (en) * | 2016-03-14 | 2025-09-24 | Mitsubishi Gas Chemical Company, Inc. | Process for producing oxymethylene copolymer |
| JP2023166639A (ja) * | 2020-10-12 | 2023-11-22 | 住友化学株式会社 | 新規フェノール化合物及び該化合物を含む樹脂組成物 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3584047A (en) * | 1967-12-29 | 1971-06-08 | Geigy Chem Corp | Alkylhydroxyphenyl polyamides |
| US3860558A (en) * | 1970-12-07 | 1975-01-14 | Ciba Geigy Corp | Stabilized polyamide compositions |
| US3691131A (en) * | 1971-02-01 | 1972-09-12 | Ciba Geigy Corp | Stabilized polyamide compositions |
| JPS5578050A (en) * | 1978-12-06 | 1980-06-12 | Mitsubishi Chem Ind Ltd | Flame-retardant polyester resin composition |
| JPS57133148A (en) * | 1981-02-10 | 1982-08-17 | Toray Ind Inc | Polyester-polyether copolymeric composition |
| JP2525452B2 (ja) * | 1988-04-27 | 1996-08-21 | 東レ株式会社 | 熱安定性に優れたポリアセタ―ル樹脂組成物 |
| JPH02209944A (ja) * | 1989-02-10 | 1990-08-21 | Asahi Chem Ind Co Ltd | ポリアセタール樹脂組成物 |
| BR9808874B1 (pt) * | 1997-04-15 | 2010-07-13 | processo para a preparação de um estabilizador com formação de pó reduzida. |
-
1998
- 1998-11-09 SG SG1998004594A patent/SG68701A1/en unknown
- 1998-11-25 GB GB9825669A patent/GB2331991B/en not_active Expired - Fee Related
- 1998-11-30 BE BE9800866A patent/BE1013420A5/fr not_active IP Right Cessation
- 1998-12-02 DE DE19855598A patent/DE19855598A1/de not_active Withdrawn
- 1998-12-03 FR FR9815268A patent/FR2772036A1/fr not_active Withdrawn
- 1998-12-03 IT IT1998MI002622A patent/IT1303818B1/it active
- 1998-12-03 CA CA002255172A patent/CA2255172A1/en not_active Abandoned
- 1998-12-03 JP JP10360061A patent/JPH11269374A/ja active Pending
- 1998-12-03 AR ARP980106136A patent/AR017194A1/es not_active Application Discontinuation
- 1998-12-04 ES ES009802548A patent/ES2155760B1/es not_active Expired - Lifetime
- 1998-12-04 BR BR9805298-5A patent/BR9805298A/pt active Search and Examination
- 1998-12-04 KR KR1019980053042A patent/KR19990062799A/ko not_active Withdrawn
- 1998-12-04 NL NL1010729A patent/NL1010729C2/nl not_active IP Right Cessation
- 1998-12-04 RU RU98122218/04A patent/RU2210578C2/ru not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL1010729A1 (nl) | 1999-06-08 |
| GB9825669D0 (en) | 1999-01-13 |
| ES2155760A1 (es) | 2001-05-16 |
| KR19990062799A (ko) | 1999-07-26 |
| DE19855598A1 (de) | 1999-06-10 |
| GB2331991B (en) | 2000-07-05 |
| AR017194A1 (es) | 2001-08-22 |
| CA2255172A1 (en) | 1999-06-05 |
| BE1013420A5 (fr) | 2002-01-15 |
| SG68701A1 (en) | 1999-11-16 |
| IT1303818B1 (it) | 2001-02-23 |
| RU2210578C2 (ru) | 2003-08-20 |
| NL1010729C2 (nl) | 1999-07-21 |
| GB2331991A (en) | 1999-06-09 |
| BR9805298A (pt) | 1999-11-23 |
| FR2772036A1 (fr) | 1999-06-04 |
| JPH11269374A (ja) | 1999-10-05 |
| ES2155760B1 (es) | 2001-12-01 |
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