EP2092028A2 - Redispergierbare oberflächenmodifizierte partikel - Google Patents
Redispergierbare oberflächenmodifizierte partikelInfo
- Publication number
- EP2092028A2 EP2092028A2 EP07819839A EP07819839A EP2092028A2 EP 2092028 A2 EP2092028 A2 EP 2092028A2 EP 07819839 A EP07819839 A EP 07819839A EP 07819839 A EP07819839 A EP 07819839A EP 2092028 A2 EP2092028 A2 EP 2092028A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- modified
- particles
- particles according
- solvent
- groups
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002245 particle Substances 0.000 title claims abstract description 70
- 229920000642 polymer Polymers 0.000 claims abstract description 35
- 239000003973 paint Substances 0.000 claims abstract description 6
- 239000003960 organic solvent Substances 0.000 claims abstract description 4
- 239000002105 nanoparticle Substances 0.000 claims description 35
- 239000003607 modifier Substances 0.000 claims description 31
- 239000002904 solvent Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 23
- 239000006185 dispersion Substances 0.000 claims description 20
- 150000004756 silanes Chemical class 0.000 claims description 17
- 239000010954 inorganic particle Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 13
- 239000011877 solvent mixture Substances 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 150000004679 hydroxides Chemical class 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 7
- 239000011541 reaction mixture Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 150000003568 thioethers Chemical class 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 4
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
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- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical compound [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 claims description 4
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 238000002296 dynamic light scattering Methods 0.000 claims description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims description 2
- 150000002576 ketones Chemical class 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 150000003856 quaternary ammonium compounds Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004922 lacquer Substances 0.000 abstract description 2
- -1 alkoxide radical Chemical class 0.000 description 55
- 125000004432 carbon atom Chemical group C* 0.000 description 31
- 125000000524 functional group Chemical group 0.000 description 29
- 239000000178 monomer Substances 0.000 description 26
- 230000002209 hydrophobic effect Effects 0.000 description 17
- 230000001687 destabilization Effects 0.000 description 15
- 125000000217 alkyl group Chemical group 0.000 description 13
- 150000003254 radicals Chemical class 0.000 description 12
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 11
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 8
- 125000000753 cycloalkyl group Chemical group 0.000 description 8
- 229910000077 silane Inorganic materials 0.000 description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 7
- WROUWQQRXUBECT-UHFFFAOYSA-N 2-ethylacrylic acid Chemical compound CCC(=C)C(O)=O WROUWQQRXUBECT-UHFFFAOYSA-N 0.000 description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 7
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 7
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Chemical group 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- RSKGMYDENCAJEN-UHFFFAOYSA-N hexadecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OC)(OC)OC RSKGMYDENCAJEN-UHFFFAOYSA-N 0.000 description 5
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 5
- 239000002609 medium Substances 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 125000003342 alkenyl group Chemical group 0.000 description 4
- 125000000304 alkynyl group Chemical group 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 125000001165 hydrophobic group Chemical group 0.000 description 4
- 230000003472 neutralizing effect Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 3
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 3
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- 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
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- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 description 1
- YAQCYZLLBMLGOB-UHFFFAOYSA-N tricyclo[5.2.1.02,6]dec-3-ylmethanol Chemical compound C1CC2C3C(CO)CCC3C1C2 YAQCYZLLBMLGOB-UHFFFAOYSA-N 0.000 description 1
- 125000002889 tridecyl 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])[H] 0.000 description 1
- FRGPKMWIYVTFIQ-UHFFFAOYSA-N triethoxy(3-isocyanatopropyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCN=C=O FRGPKMWIYVTFIQ-UHFFFAOYSA-N 0.000 description 1
- IWLSUQKHNRJROT-UHFFFAOYSA-N triethyl 3-isocyanatopropyl silicate Chemical compound CCO[Si](OCC)(OCC)OCCCN=C=O IWLSUQKHNRJROT-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl 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])[H] 0.000 description 1
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- 150000003673 urethanes Chemical class 0.000 description 1
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- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical class OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- 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
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- C08K9/02—Ingredients treated with inorganic substances
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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- C09C1/043—Zinc oxide
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- C09C1/24—Oxides of iron
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
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- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
Definitions
- the present invention relates to surface-modified particles that are dispersible in organic solvents and their use for incorporation into polymers, paints and coatings.
- Inorganic particles in particular nanoparticles, are usually prepared in aqueous dispersion and often have to be converted into organic media. If, for example, the hydrophilic nanoparticles are brought too quickly into a non-polar environment, it occurs
- the present object is achieved by particles according to the present invention and by processes for their preparation.
- a first object of the present invention is the
- Providing surface-modified inorganic particles which are obtainable by a process in which, in a solvent or solvent mixture, inorganic particles and at least one surface modifier are reacted together, and in step b), the reaction mixture obtained by the action of one or more external Factor destabilized to obtain the surface-modified inorganic particles.
- Process for the preparation of surface-modified particles wherein in a step a) inorganic particles and at least one surface modifier are reacted in a solvent or solvent mixture and in a step b) the obtained reaction mixture is destabilized by the action of one or more external factors to obtain the surface-modified inorganic particles , are also the subject of the present invention.
- the inorganic particles in particular nanoparticles
- the solvent or solvent mixture according to step a) comprises water, alcohols, ketones and / or ethers, in particular water, isopropanol, acetone and / or THF.
- Essential to the present invention is the controlled destabilization of the reaction mixture in step b) by the action of one or more external factors.
- Destabilization in the sense of the present invention means on the one hand a destabilization of the particles, which leads to the precipitation of the surface-modified particles and thus makes the particles separable (and redispersible).
- destabilization also means the phase separation of two or more solvents, the particles remaining suspended in one of the solvents, preferably the organic one.
- the particles according to the invention can be separated off and / or dried.
- the process of separation can be done by any of the skilled man known types.
- nanoparticles obtainable which can be redispersed without major problems and yield losses in any media and solvents so that the measurable turbidity is significantly lower than that of a dispersion of unmodified particles.
- Essential to the invention for the surface-modified nanoparticles is their good redispersibility and the transparency of the dispersions obtained therefrom. This transparency can be determined by the turbidity, the dispersion, using a UV / VIS / NIR spectrometer Lambda 900 with
- Integration sphere measured 150 mm, quantify.
- the dispersions are measured in 0.5 cm layer thickness in transmission.
- the surface modifier is covalently bonded to the surface of the nanoparticle.
- a sufficient degree of occupancy of the surface of the nanoparticles with the surface modifier can only be achieved if the destabilization of the particle dispersion is controlled in a controlled manner, ie a destabilization of the surface-modified nanoparticle-containing suspension is initiated only by targeted action of external factors.
- Destabilization may preferably be controlled by external factors, such as by changing the pH after surface modification Addition of solvent or by adding solubilizer to the particle dispersion, by temperature change or by salt addition. For example, with solvent addition of different polarity as the external factor, the polarity of the reaction mixture is increased. Due to the above procedures is a premature
- Destabilization which would lead to an insufficient degree of occupancy of the surface of the nanoparticles prevented, and thus allows the occupancy of the surface with the surface modifier to a desired occupancy level.
- Targeted destabilization thus only takes place after a corresponding change in the external factors, generally at a later time than in the known methods.
- the particular challenge is that the surface modifier must first be formed into a reactive species in an upstream reaction. This is the case, in particular, when alkoxysilanes are used, which have a significantly higher reactivity with respect to the particle surface if the alkoxide radical is wholly or partly hydrolyzed. Then, the initial goal is to achieve the most stable possible solution of the reactive form of the surface modifier, which is then rapidly brought to react with the nanoparticle surface and thus destabilize by changing the external factor (s).
- This can e.g. can be realized by adjusting a pH close to the isoelectric point of the silane in which the hydrolysis of the alkoxy radicals proceeds rapidly but the crosslinking is inhibited.
- the activated silanes react very rapidly and almost quantitatively with the nanoparticle surface.
- the nanoparticles precipitated in this way have a significantly better redispersibility than nanoparticles occupied in another reaction procedure.
- the surface modifier is a polymer which is dissolved together with the dispersion of the particles,
- an additional solvent can be used as a solubilizer.
- acetone is used as a solubilizer.
- the solubilizer is used in proportions of from 1 to 50% by weight, based on the particle dispersion, preferably in proportions of from 5 to 20% by weight.
- the external factor is now the stability (solubility) of the polymer and thus the modified particles influenced so that it comes to the failure of the same.
- the external factor may be a change in the solvent composition, for example, by distilling off one component, or preferably by adding a non-solvent for the polymer which is miscible with the other solvents or a temperature change.
- Preference is given to using polymers having a plurality, particularly preferably a reactive group, which are able to react with the particle surface.
- the individual reactive group may be a terminal silane on the polymer.
- the functionalized, precipitated particles can be conveniently separated from the solvent mixture and completely redispersed in a hydrophilic or hydrophobic, preferably in a hydrophobic solvent (butyl acetate, xylene, aliphatic hydrocarbons).
- a hydrophilic or hydrophobic preferably in a hydrophobic solvent (butyl acetate, xylene, aliphatic hydrocarbons).
- the surface coverage is not only a compatibilization with the target matrix (solvent, paint system or polymer melt), it can also effectively prevent the agglomeration of dried particles.
- Destabilization can be achieved. It is within the skill of the art to use the appropriate external factor for the targeted control of destabilization.
- the surface modifier is so-called LCST or
- UCST polymers The special polymers mentioned are polymers which have a lower critical solution temperature (LCST) or an upper critical solution temperature (UCST). Depending on the polymer used, a homogeneous mixture is produced by heating or cooling. at
- Inversion of the process precipitates the polymer on the particle surface, that is, the external factor in this case is a change in temperature.
- Suitable LCST polymers for the present invention are, for example, those described in WO 01/60926 and WO 03/014229.
- Particularly suitable LCST polymers are polyalkylene oxide derivatives, preferably polyethylene oxide (PEO) derivatives, polypropylene oxide (PPO) derivatives, olefinically modified PPO-PEO block copolymers, acrylate-modified PEO-PPO-PEO triblock copolymers, and polymers or their derivatives from the class of polymethyl vinyl ethers, poly-N-vinylcaprolactams, ethyl (hydroxyethyl) - celluloses, poly (N-isopropylacrylamide) and polysiloxanes.
- Particularly preferred LCST polymers are siloxane polymers or polyethers modified with olefinic or silanolic groups.
- Suitable UCST polymers are in particular polystyrene, polystyrene copolymers and polyethylene oxide copolymers.
- LCST or UCST polymers having solvolysable or functional groups which have strong interactions and / or chemical bonds with the substrate or the application medium, such as the paint matrix, can enter.
- All functional groups known to those skilled in the art are suitable, in particular silanol, amino, hydroxyl, olefin, hydroxyl, epoxy, acid anhydride and acid groups.
- the LCST or UCST polymers preferably have molecular weights in the
- Suitable surface modifiers are amphiphilic silanes, as described below.
- amphiphilic silanes it is obvious to the person skilled in the art, when using amphiphilic silanes, to control the de-stabilization of the particle dispersion by influencing additional external factors, as described above.
- Suitable particles are selected from the group comprising hydrophilic and hydrophobic, in particular hydrophilic particles, in particular nanoparticles, based on oxides, hydroxides, sulfides, sulfates, carbonates of silicon, titanium, zinc, aluminum, cerium, cobalt, chromium, nickel, iron , Yttrium and / or zirconium, or with oxides or hydroxides of silicon coated metals, such as Ag 1 Cu, Fe, Au, Pd, Pt or alloys.
- the particles based on oxides, hydroxides, sulfides, sulfates, carbonates of titanium, zinc, aluminum, cerium, cobalt, chromium, nickel, iron, yttrium and / or zirconium may optionally be coated with oxides or hydroxides of silicon.
- the individual oxides can also be present as mixtures.
- the particles preferably have an average particle size, determined by means of a Malvern ZETASIZER (dynamic light scattering) or transmission electron microscope, of from 3 to 200 nm, in particular from 20 to 80 nm and very particularly preferably from 30 to 50 nm.
- the invention is the distribution of the particle sizes narrow, ie the fluctuation range is less than 100% of the average, more preferably at most 50% of the average value (after particle distribution function, determined by dynamic light scattering). Particular preference is given to using nanoparticles based on silicon dioxide.
- Nanohektorites which are marketed, for example, by Südchemie under the Optigel® brand or by Laporte under the Laponite® brand, are also preferably used. Furthermore, silica sols (SiO 2 in water) prepared from ion-exchanged water glass are also particularly preferred.
- Particularly suitable as surface modifiers are organofunctional silanes, quaternary ammonium compounds,
- the surface modifiers are selected from the group of organofunctional silanes.
- the described requirements for a surface modifier fulfill an adhesion promoter which carries two or more functional groups.
- One group of the coupling agent chemically reacts with the oxide surface of the nanoparticle.
- alkoxysilyl groups e.g., methoxy, ethoxysilanes
- halosilanes e.g., chloro
- Phosphonic acids and phosphonic acid esters into consideration.
- the functional group is preferably acrylate, methacrylate, vinyl,
- Silane-based surface modifiers are described, for example, in DE 40 11 044 C2.
- Phosphoric acid-based surface modifiers include i.a. as Lubrizol® 2061 and 2063 from LUBRIZOL (Langer & Co.).
- Suitable silanes are, for example, vinyltrimethoxysilane, aminopropyltriethoxysilane, N-ethylamino-N-propyldimethoxysilane, isocyanatopropyltriethoxysilane, mercaptopropyltrimethoxysilane, vinyltriethoxysilane, vinylethyldichlorosilane, vinylmethyldiacetoxysilane, vinylmethyldichlorosilane,
- Particularly preferred is 3-methacryloxypropyltrimethoxysilane.
- silanes are commercially available, for example, from ABCR GmbH & Co., Düsseldorf, or from Sivento Chemie GmbH, Dusseldorf. Vinylphosphonic acid or vinylphosphonic acid diethyl ester can also be listed here as adhesion promoters.
- suitable surface modifiers include amphiphilic silanes according to the general formula (I) where the radicals R may be identical or different and are hydrolytically removable radicals, Sp is either O or straight-chain or branched alkyl having 1-18 G
- Atoms straight-chain or branched alkenyl having 2-18 C atoms and one or more double bonds, straight-chain or branched
- a hp means a hydrophilic block
- B hb is a hydrophobic block and wherein at least one reactive functional group is bound to A hP and / or B hb .
- amphiphilic silanes have the advantage that they combine several properties. For example, they can impart a surface with hydrophilic properties to particles via the hydrophilic block and, at the same time, impart a surface with hydrophobic properties via the hydrophobic block. This results in a self-organized switchability of the hydrophilicity / hydrophobicity depending on the environment of the particle surface.
- the additional reactive functional group may form further bonds, eg to a surrounding medium.
- the surface of the particles is therefore adapted for the most diverse applications by a single modification and thus becomes compatible for all applications.
- the amphiphilic silanes due to the greater chain length increased mobility with respect to the orientation and orientation of the silanes, for example on a surface on. This helps to improve the alignment of the respective areas of the amphiphilic silane interacting with the surrounding medium and thus also improves the compatibility of the coated therewith
- Essential for the amphiphilic silanes according to the invention is the structure of the individual subunits, as shown in formula (I).
- amphiphilic silanes contain a head group (R) 3 Si, where the radicals R may be the same or different and represent hydrolytically removable radicals. Preferably, the radicals R are the same.
- Suitable hydrolytically removable radicals are, for example
- Suitable alkoxy groups are, for example, methoxy, ethoxy, propoxy or butoxy groups.
- Suitable halogens are in particular Br and Cl.
- Examples of acyloxy groups are acetoxy or propoxy groups.
- Oximes are also suitable as hydrolytically removable radicals.
- the oximes may hereby be substituted by hydrogen or any organic radicals.
- the radicals R are preferably alkoxy groups and in particular methoxy or ethoxy groups.
- the group S P is either -O- or straight-chain or branched alkyl having 1-18 C atoms, straight-chain or branched alkenyl having 2-18 C atoms and one or more double bonds, straight-chain or branched alkynyl having 2-18 C atoms and one or more triple bonds, saturated, partial or fully unsaturated cycloalkyl having 3-7 C atoms, which with
- Alkyl groups with 1-6 C atoms may be substituted.
- the Ci-Ci 8 alkyl group of Sp is, for example, a methyl, ethyl, isopropyl, propyl, butyl, sec-butyl or tert-butyl, and also pentyl, 1, 2 or 3-methylbutyl, 1, 1, 1, 2, or 2,2-dimethylpropyl, 1 -
- it may be perfluorinated, for example as difluoromethyl, tetrafluoroethyl, hexafluoropropyl or octafluorobutyl.
- a straight-chain or branched alkenyl having 2 to 18 carbon atoms, where a plurality of double bonds may also be present, is, for example, vinyl, allyl, 2- or 3-butenyl, isobutenyl, sec-butenyl, furthermore 4-pentenyl, iso-pentenyl, Hexenyl, heptenyl, octenyl, -C 9 Hi 6 , -CioHi 8 to -Ci 8 H 3 4, preferably allyl, 2- or 3-butenyl, isobutenyl, sec-butenyl, furthermore preferred is 4-pentenyl, iso-pentenyl or hexenyl.
- a straight-chain or branched alkynyl having 2 to 18 C atoms, wherein a plurality of triple bonds may also be present, is, for example, ethynyl, 1- or 2-propynyl, 2- or 3-butynyl, furthermore
- Pentynyl 3-pentynyl, hexynyl, heptynyl, octynyl, -CgHi 4 , -C 10 H 1 6 to -C 1 8 H 32 , preferably ethynyl, 1- or 2-propynyl, 2- or 3-butynyl, 4-pentynyl, 3 - Pentynyl or hexynyl.
- Unsubstituted saturated or partially or fully unsaturated cycloalkyl groups having 3-7 C atoms may include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclopenta-1,3- dienyl, cyclohexenyl, cyclohexa-1,3-dienyl, cyclohexa-1, 4-dienyl, phenyl, cycloheptenyl, cyclohepta-1,3-dienyl, cyclohepta-1,4-dienyl or cycloheptane. 1, 5-dienyl be substituted with d- to C 6 - alkyl groups.
- the spacer group Sp is followed by the hydrophilic block A hp .
- This may be selected from nonionic, cationic, anionic or zwitterionic hydrophilic polymers, oligomers or groups.
- the hydrophilic block is ammonium, sulfonium, phosphonium groups, alkyl chains having carboxyl, sulfate and phosphate side groups, which may also be present as a corresponding salt, partially esterified anhydrides with free acid or Salt group, OH-substituted alkyl or cycloalkyl chains (eg, sugars) having at least one OH group, NH- and SH-substituted alkyl or cycloalkyl chains or mono-, di- tri- or oligo-ethylene glycol groups.
- the length of the corresponding alkyl chains can be 1 to 20 C atoms, preferably 1 to 6 C atoms.
- nonionic, cationic, anionic or zwitterionic hydrophilic polymers, oligomers or groups can be prepared from corresponding monomers by polymerization in accordance with methods generally known to the person skilled in the art.
- Suitable hydrophilic monomers contain at least one dispersing functional group which consists of the group consisting of
- Quaternizing agents can be converted into cations, and cationic groups, and / or
- the functional groups (i) from the group consisting of carboxylic acid, sulfonic acid and phosphonic acid groups, acidic sulfuric acid and phosphoric acid ester groups and carboxylate, sulfonate, phosphonate, sulfate ester and phosphate ester groups, the functional groups (ii) from the A group consisting of primary, secondary and tertiary amino groups, primary, secondary, tertiary and quaternary ammonium groups, quaternary phosphonium groups and tertiary sulfonium groups, and the functional groups (iii) selected from the group consisting of omega-hydroxy and omega-alkoxy-poly ( alkylene oxide) -1-yl groups.
- the primary and secondary amino groups may also serve as isocyanate-reactive functional groups.
- hydrophilic monomers having functional groups are acrylic acid, methacrylic acid, beta-carboxyethyl acrylate, ethacrylic acid, crotonic acid, maleic acid, fumaric acid or itaconic acid; olefinically unsaturated sulfonic or phosphonic acids or their partial esters; or maleic mono (meth) acryloyloxyethyl ester,
- Succinic acid mono (meth) acryloyloxyethyl ester or Phthalcicremo- no (meth) acryloyloxyethylester in particular acrylic acid and
- hydrophilic monomers having functional groups (II) are 2-aminoethyl acrylate and methacrylate or allylamine.
- hydrophilic monomers with functional groups (iii) are omega-hydroxy or omega-methoxy-polyethylene oxide-1-yl, omega-methoxy-polypropylene oxide-1-yl, or omega-methoxy-poly (ethylene oxide-co-poly) polypropylene oxide) -1-yl acrylate or methacrylate, as well as hydroxy-subsitituted ethylene, acrylates or methacrylates, such as, for example, hydroxyethyl methacrylate.
- suitable monomers for the formation of zwitterionic hydrophilic polymers are those in which a betaine structure occurs in the side chain.
- the side group is selected from - (CH 2) m - (N + (CH 3) 2) - (CH 2) n-SO 3 -, - (CH 2) m- (N + (CH3) 2) - ( CH 2 ) n-PO 3 2 -, - (CH 2 ) m - (N + (CH 3 ) 2 ) - (CH 2 ) n -
- At least one structural unit of the hydrophilic block has a phosphonium or sulfonium radical.
- LMA lauryl methacrylate
- DMAEMA Dimethylaminoethylmethacrylat
- Propansultone obtained by known methods.
- a copolymer consisting essentially of lauryl methacrylate (LMA) and hydroxyethyl methacrylate (HEMA) is used, which can be prepared in a known manner by free radical polymerization with AIBN in toluene.
- LMA lauryl methacrylate
- HEMA hydroxyethyl methacrylate
- hydrophilic monomers it is to be noted that it is preferable to combine the hydrophilic monomers having functional groups (i) and the hydrophilic monomers having functional groups (ii) so as not to form insoluble salts or complexes.
- the hydrophilic monomers having functional groups (i) or functional groups (ii) can be arbitrarily combined with the hydrophilic monomers having functional groups (iii).
- the monomers having the functional groups (i) are particularly preferably used.
- the neutralizing agents for the anionic functional groups (i) are selected from the group consisting of ammonia, trimethylamine, triethylamine, tributylamine, dimethylaniline, diethylaniline, triphenylamine, dimethylethanolamine, diethylethanolamine, methyldiethanolamine, 2-aminomethylpropanol, dimethylisopropylamine, dimethylisopropanolamine, triethanolamine , Diethylenetriamine and triethylenetetramine, and the neutralizing agents for the cation-convertible functional groups (ii) selected from the group consisting of sulfuric acid, hydrochloric acid, phosphoric acid, formic acid, acetic acid, lactic acid, dimethylolpropionic acid and citric acid.
- the hydrophilic block is selected from mono- and triethylene glycol structural units. Attached to the hydrophilic block Ah P is the hydrophobic block B h t > - The block Bh b is based on hydrophobic groups or, like the hydrophilic block, on the polymerization of suitable hydrophobic monomers.
- hydrophobic groups are straight-chain or branched alkyl having 1-18 C atoms, straight-chain or branched alkenyl having 2-18 C atoms and one or more double bonds, straight-chain or branched alkynyl having 2-18 C atoms and one or more triple bonds , saturated, partially or fully unsaturated cycloalkyl having 3-7 C atoms, which may be substituted by alkyl groups having 1-6 C atoms. Examples of such groups are already mentioned in advance.
- aryl, polyaryl, aryl-C 1 -C 6 -alkyl or esters having more than 2 C atoms are suitable.
- the groups mentioned may also be substituted, in particular with halogens, with perfluorinated groups being particularly suitable.
- Aryl-C 1 -C 6 -alkyl is, for example, benzyl, phenylethyl, phenylpropyl, phenylbutyl, phenylpentyl or phenylhexyl, where both the phenyl ring and the alkylene chain, as described above, may be partially or completely substituted by F, particularly preferably benzyl or phenylpropyl.
- substantially acid-group-free esters of olefinically unsaturated acids such as (meth) acrylic acid, crotonic acid, ethacrylic acid, vinylphosphonic acid or vinylsulfonic acid alkyl or cycloalkyl esters having up to 20 carbon atoms in the alkyl radical, in particular methyl, ethyl, propyl, n-butyl, sec-butyl, tert-butyl, hexyl, ethylhexyl, stearyl and lauryl acrylate, methacrylate, crotonate, methacrylate or vinyl phosphonate or vinyl sulfonate; cycloaliphatic (meth) acrylic acid, crotonic acid, ethacrylic acid, vinylphosphonic acid or vinylsulfonic acid esters, in particular cyclohexyl, isobomyl, dicyclopentadienyl, octahydro-4,7-methan
- minor amounts of higher functional (meth) acrylic acid, crotonic acid or ethacrylic alkyl or cycloalkyl esters such as ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, butylene glycol, pentane-1, 5-diol, hexane-1, 6 -diol, octahydro-4,7-methano-1H-indenedimethanol or cyclohexane-1, 2-, -1, 3- or -1, 4-diol di (meth) acrylate, trimethylolpropane tri (meth) acrylate or pentaerythritol tetra (meth) acrylate and the analogous ethacrylates or crotonates.
- minor amounts of higher-functional monomers (1) are amounts which do not lead to crosslinking or gelation of the polymers;
- Hydroxyalkyl esters of alpha, beta-olefinically unsaturated carboxylic acids such as hydroxyalkyl esters of acrylic acid, methacrylic acid and ethacrylic acid, in which the hydroxyalkyl group contains up to 20 carbon atoms, such as 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 3-hydroxybutyl , 4-hydroxybutyl acrylate, methacrylate or ethacrylate; 1,4-bis (hydroxymethyl) cyclohexane, octahydro-4,7-methano-1H-indenedimethanol or methylpropanediol monoacrylate, monomethacrylate, monoethacrylate or monocrotonate; or reaction products of cyclic esters, e.g. epsilon-caprolactone and these hydroxyalkyl esters;
- - olefinically unsaturated alcohols such as allyl alcohol
- Allyl ethers of polyols such as trimethylolpropane monoallyl ether or pentaerythritol mono-, di- or triallyl ether.
- the higher functionality monomers are generally used only in minor amounts. In the context of the present invention, minor amounts of higher-functional monomers are amounts which do not lead to crosslinking or gelation of the polymers,
- Glycidyl esters of an alpha-branched monocarboxylic acid having 5 to 18 carbon atoms in the molecule The reaction of the acrylic or methacrylic acid with the glycidyl ester of a carboxylic acid having a tertiary alpha carbon atom may be carried out before, during or after the polymerization reaction.
- the monomer (2) used is preferably the reaction product of acrylic and / or methacrylic acid with the glycidyl ester of Versatic® acid. This glycidyl ester is commercially available under the name Cardura® E10.
- Formaldehyde adducts of aminoalkyl esters of alpha, beta-olefinically unsaturated carboxylic acids and of alpha, beta-unsaturated carboxylic acid amides such as N-methylol and N, N-dimethylol aminoethyl acrylate, aminoethyl methacrylate, acrylamide and methacrylamide; such as
- Carboxylic acid in particular acrylic acid and methacrylic acid, or their hydroxyalkyl esters; (3) vinyl esters of alpha-branched monocarboxylic acids having 5 to 18 carbon atoms in the molecule, such as the vinyl esters of Versatic® acid sold under the trademark VeoVa®;
- cyclic and / or acyclic olefins such as ethylene, propylene, but-1-ene, pent-1-ene, hex-1-ene, cyclohexene, cyclopentene, norbornene, butadiene, isoprene, cyclopentadiene and / or dicyclopentadiene;
- monomers containing epoxide groups such as the glycidyl esters of acrylic acid, methacrylic acid, ethacrylic acid, crotonic acid, maleic acid, fumaric acid and / or itaconic acid;
- vinyl aromatic hydrocarbons such as styrene, vinyltoluene or alpha-alkylstyrenes, especially alpha-methylstyrene;
- nitriles such as acrylonitrile or methacrylonitrile
- vinyl compounds selected from the group consisting of vinyl halides such as vinyl chloride, vinyl fluoride, vinylidene dichloride,
- Vinylidene vinylidene
- Vinylamides such as N-vinylpyrrolidone
- Vinyl ethers such as ethyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether, n-butyl vinyl ether, isobutyl vinyl ether and vinyl cyclohexyl ether
- vinyl esters such as vinyl acetate, vinyl propionate, and vinyl butyrate
- allyl compounds selected from the group consisting of allyl ethers and esters, such as propyl allyl ether, butyl allyl ether, Ethylene glycol diallyl ether, trimethylolpropane triallyl ether or allyl acetate or allyl propionate; As far as the higher-functional monomers are concerned, what has been said above applies mutatis mutandis;
- Siloxane or polysiloxane monomers which may be substituted with saturated, unsaturated, straight-chain or branched alkyl groups or other hydrophobic groups already mentioned above.
- polysiloxane macromonomers which have a number average molecular weight Mn of from 1,000 to 40,000 and on average from 0.5 to 2.5 ethylenically unsaturated double bonds per molecule, such as
- Polysiloxane macromonomers having a number average molecular weight Mn of from 1,000 to 40,000 and an average of from 0.5 to 2.5 ethylenically unsaturated double bonds per molecule; in particular polysiloxane macromonomers which have a number-average molecular weight Mn of 2,000 to 20,000, more preferably 2,500 to 10,000 and in particular 3,000 to 7,000 and an average of 0.5 to 2.5, preferably 0.5 to 1, 5, ethylenically unsaturated double bonds per molecule, as in DE 38 07 571 A 1 on pages 5 to 7, DE 37 06 095 A 1 in columns 3 to 7, EP 0 358 153 B 1 on pages 3 to 6, in US 4,754,014 A 1 in columns 5 to 9, in DE 44 21 823 A1 or in international patent application WO 92/22615 on page 12, line 18, to page 18, line 10; and
- carbamate or allophanate group-containing monomers such as acryloyloxy or methacryloyloxyethyl, propyl or butyl carbamate or allophanate; Further examples of suitable monomers containing carbamate groups are described in patents US 3,479,328 A 1, US 3,674,838 A 1, US 4,126,747 A 1, US 4,279,833 A 1 or US 4,340,497 A 1.
- the respective hydrophilic and hydrophobic blocks can in principle be combined with one another in any desired manner.
- the amphiphilic silanes Preferably have an HLB value in the range of 2-19, preferably in the range of 4-15.
- the HLB value is defined as
- HLB value is calculated theoretically and results from the mass fractions of hydrophilic and hydrophobic groups.
- An HLB value of 0 indicates a lipophilic compound, a chemical compound with an HLB value of 20 has only hydrophilic moieties.
- the amphiphilic silanes are further distinguished by the fact that at least one reactive functional group is bound to A hp and / or B h b.
- the reactive functional group is preferably present at the hydrophobic block B h b, and in particular preferably at the end of the hydrophobic block.
- the head group (R 1) 3 Si and the reactive functional group have the greatest possible spacing, which permits a particularly flexible design of the chain lengths of the blocks Ah P and B hb , without the possible reactivity of the reactive groups, for example with the surrounding medium. to significantly limit.
- the reactive functional group may be selected from silyl groups having hydrolytically removable radicals, OH, carboxy, NH, SH groups, halogens or double bonds containing reactive groups, such as acrylate or vinyl groups. Suitable silyl groups with hydrolytically removable radicals have already been described in advance in the description of the head group (R) 3Si. Preferably, the reactive group is an OH group.
- the nanoparticles according to the invention are isolated after destabilization. This is done by centrifuging, filtering and optionally by washing with water and / or alcohol.
- the surface-modified nanoparticles obtained in this way can be easily dispersed in a new medium.
- the nanoparticles are mixed with the dispersant.
- nanoparticles according to the invention in paints, inks, adhesives and plastics, in particular in transparent applications, is likewise an object of the present invention.
- the particles of the invention in particular in the case of nanoparticles, the chemical, thermal and mechanical stability of polymers improved or targeted parts of the electromagnetic
- the incorporation into polymers and lacquers can be carried out by customary methods for the preparation of polymer preparations.
- the polymer material can be mixed with nanoparticles according to the invention, preferably with the dried particles, preferably in an extruder or kneader, and incorporated into 2K coating systems by mixing the nanoparticles with the polymer starting components of 2K coating systems.
- Preferred polymers are polycarbonate (PC), polyethylene terephthalate (PETP), polyimide (PI), polystyrene (PS), polymethyl methacrylate (PMMA), polyolefins, preferably polybutadiene and polyisoprene and copolymers containing at least a portion of one of the polymers mentioned, and 2K coating systems.
- HDTMS hexadecyltrimethoxysilane
- the dispersions are measured in 0.5 cm layer thickness in transmission.
- the directional and diffuse components are calculated (Table
- the results of the turbidity measurements document the increasing proportion of the diffuse transmittance and, consequently, the increase of the directed transmission with decreasing surface coverage with the silane.
- the process of surface modification ensures agglomerate-free nanoparticles that in comparison to the reference experiment (without surface modifier or without isopropanol) are characterized by a low diffuse component of the transmittance.
- the visual appearance of the samples (0.3 - 1.0 gr / nm 2 ) is transparent (opalescent).
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006058200A DE102006058200A1 (de) | 2006-12-11 | 2006-12-11 | Redispergierbare oberflächenmodifizierte Partikel |
| PCT/EP2007/009938 WO2008071286A2 (de) | 2006-12-11 | 2007-11-16 | Redispergierbare oberflächenmodifizierte partikel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2092028A2 true EP2092028A2 (de) | 2009-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07819839A Withdrawn EP2092028A2 (de) | 2006-12-11 | 2007-11-16 | Redispergierbare oberflächenmodifizierte partikel |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8586659B2 (de) |
| EP (1) | EP2092028A2 (de) |
| JP (1) | JP2010512434A (de) |
| DE (1) | DE102006058200A1 (de) |
| WO (1) | WO2008071286A2 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102008020440A1 (de) | 2008-04-23 | 2009-10-29 | Merck Patent Gmbh | Reaktiv oberflächenmodifizierte Partikel |
| DE102008060228A1 (de) * | 2008-12-04 | 2010-06-10 | Merck Patent Gmbh | Oberflächenmodifizierte Pigmente |
| DE102009023157A1 (de) | 2009-05-29 | 2010-12-02 | Merck Patent Gmbh | Beschichtete Partikel |
| JP5546480B2 (ja) | 2011-03-08 | 2014-07-09 | 株式会社東芝 | 有機電界発光素子及びその製造方法 |
| EP2780122A1 (de) | 2011-11-15 | 2014-09-24 | Apceth GmbH & Co. KG | Polymermodifizierte substrate, ihre herstellung und verwendungen davon |
| RU2538887C2 (ru) * | 2013-03-05 | 2015-01-10 | Федеральное государственное бюджетное учреждение науки Институт неорганической химии им. А.В. Николаева Сибирского отделения Российской академии наук | Полимерный кобальтсодержащий композит |
| JP6531104B2 (ja) * | 2013-09-23 | 2019-06-12 | ピクセリジェント・テクノロジーズ・エルエルシー | 高屈折率シリコーンナノ複合材 |
| JP6225601B2 (ja) * | 2013-09-24 | 2017-11-08 | Dic株式会社 | 水蒸気バリア接着剤用樹脂組成物の製造方法、および水蒸気バリア用接着剤、水蒸気バリア用フィルム、水蒸気バリア用コーティング剤、水蒸気バリア用積層体 |
| DE102014219652A1 (de) * | 2014-09-29 | 2016-03-31 | Siemens Aktiengesellschaft | Herstellen eines Schlickers und Bauteil aus dem Schlicker |
| WO2016123107A1 (en) * | 2015-01-28 | 2016-08-04 | The Administrators Of The Tulane Educational Fund | Nanoparticle polymer grafted dispersants and unimolecular micelles and methods of use |
| US10414029B2 (en) * | 2016-04-06 | 2019-09-17 | Tribus Innovations, LLC | Ratchet wrench |
| CN120665497B (zh) * | 2025-07-30 | 2025-12-26 | 广州市柏奥体育场地设施工程有限公司 | 一种无味抗菌聚合物基复合材料及其制备方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1544257A2 (de) * | 2003-12-19 | 2005-06-22 | Nissan Chemical Industries, Limited | Verfahren zur Herstellung von Solen anorganischer Oxide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6058237A (ja) | 1983-09-07 | 1985-04-04 | Mitsubishi Chem Ind Ltd | 無機粒子のカプセル化方法 |
| GB9110407D0 (en) | 1991-05-14 | 1991-07-03 | Allied Colloids Ltd | Particulate polymeric compositions and their production |
| JP3474330B2 (ja) | 1995-10-03 | 2003-12-08 | Jsr株式会社 | 反応性シリカ粒子、その製法および用途 |
| US6329058B1 (en) * | 1998-07-30 | 2001-12-11 | 3M Innovative Properties Company | Nanosize metal oxide particles for producing transparent metal oxide colloids and ceramers |
| US6686035B2 (en) * | 1999-02-05 | 2004-02-03 | Waters Investments Limited | Porous inorganic/organic hybrid particles for chromatographic separations and process for their preparation |
| DE10006538C2 (de) * | 2000-02-15 | 2002-11-28 | Forsch Pigmente Und Lacke E V | Verfahren zur Beschichtung von Partikeln mit LCST-Polymeren |
| US6962946B2 (en) * | 2001-11-21 | 2005-11-08 | 3M Innovative Properties Company | Nanoparticles having a rutile-like crystalline phase and method of preparing same |
| AU2003225756A1 (en) * | 2002-03-13 | 2003-09-29 | Peter W. Carr | Silica-based materials and methods |
| DE10228186A1 (de) | 2002-06-24 | 2004-01-22 | Merck Patent Gmbh | UV-stabilisierte Partikel |
| DE10243438A1 (de) * | 2002-09-18 | 2004-03-25 | Merck Patent Gmbh | Oberflächenmodifizierte Effektpigmente |
| DE10254430A1 (de) * | 2002-11-21 | 2004-06-03 | Süd-Chemie AG | LCST-Polymere |
| DE10257388A1 (de) | 2002-12-06 | 2004-06-24 | Sustech Gmbh & Co. Kg | Nanopartikuläres redispergierbares Zinkoxidpulver |
| CA2554331A1 (en) | 2004-01-27 | 2005-08-04 | Matthias Koch | Nanoparticles |
| DE102004006145A1 (de) | 2004-02-07 | 2005-08-25 | Merck Patent Gmbh | Partikel mit funktionellem Multilayeraufbau |
| DE102004020767A1 (de) * | 2004-04-27 | 2005-11-24 | Basf Ag | Oberflächenmodifizierte Metalloxide, Verfahren zur Herstellung und deren Verwendung in kosmetischen Zubereitungen |
| DE102006012467A1 (de) | 2006-03-17 | 2007-09-20 | Merck Patent Gmbh | Redispergierbare Nanopartikel |
-
2006
- 2006-12-11 DE DE102006058200A patent/DE102006058200A1/de not_active Withdrawn
-
2007
- 2007-11-16 EP EP07819839A patent/EP2092028A2/de not_active Withdrawn
- 2007-11-16 WO PCT/EP2007/009938 patent/WO2008071286A2/de not_active Ceased
- 2007-11-16 US US12/518,780 patent/US8586659B2/en not_active Expired - Fee Related
- 2007-11-16 JP JP2009540619A patent/JP2010512434A/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1544257A2 (de) * | 2003-12-19 | 2005-06-22 | Nissan Chemical Industries, Limited | Verfahren zur Herstellung von Solen anorganischer Oxide |
Also Published As
| Publication number | Publication date |
|---|---|
| US8586659B2 (en) | 2013-11-19 |
| WO2008071286A2 (de) | 2008-06-19 |
| US20100010137A1 (en) | 2010-01-14 |
| WO2008071286A3 (de) | 2009-04-30 |
| DE102006058200A1 (de) | 2008-06-12 |
| JP2010512434A (ja) | 2010-04-22 |
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