CN1033895A - The preparation method of cast polyurethane resin for cable accessory - Google Patents
The preparation method of cast polyurethane resin for cable accessory Download PDFInfo
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- CN1033895A CN1033895A CN 87102104 CN87102104A CN1033895A CN 1033895 A CN1033895 A CN 1033895A CN 87102104 CN87102104 CN 87102104 CN 87102104 A CN87102104 A CN 87102104A CN 1033895 A CN1033895 A CN 1033895A
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- component
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- polymer polyatomic
- polyisocyanates
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229920005749 polyurethane resin Polymers 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 22
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 150000001412 amines Chemical class 0.000 claims abstract description 6
- 150000003606 tin compounds Chemical class 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 229920001228 polyisocyanate Polymers 0.000 claims description 6
- 239000005056 polyisocyanate Substances 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- 239000004970 Chain extender Substances 0.000 claims description 4
- 150000001298 alcohols Chemical class 0.000 claims description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 7
- 230000006837 decompression Effects 0.000 abstract description 5
- 230000018044 dehydration Effects 0.000 abstract description 5
- 238000006297 dehydration reaction Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000036314 physical performance Effects 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 229920001451 polypropylene glycol Polymers 0.000 description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MWCADZVQNIHFGT-UHFFFAOYSA-N 1-anilinopropan-2-ol Chemical compound CC(O)CNC1=CC=CC=C1 MWCADZVQNIHFGT-UHFFFAOYSA-N 0.000 description 1
- AXFVIWBTKYFOCY-UHFFFAOYSA-N 1-n,1-n,3-n,3-n-tetramethylbutane-1,3-diamine Chemical compound CN(C)C(C)CCN(C)C AXFVIWBTKYFOCY-UHFFFAOYSA-N 0.000 description 1
- GTACSIONMHMRPD-UHFFFAOYSA-N 2-[4-[2-(benzenesulfonamido)ethylsulfanyl]-2,6-difluorophenoxy]acetamide Chemical compound C1=C(F)C(OCC(=O)N)=C(F)C=C1SCCNS(=O)(=O)C1=CC=CC=C1 GTACSIONMHMRPD-UHFFFAOYSA-N 0.000 description 1
- 101710130081 Aspergillopepsin-1 Proteins 0.000 description 1
- 102100031007 Cytosolic non-specific dipeptidase Human genes 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- 239000011218 binary composite Substances 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- RGCPMRIOBZXXBR-UHFFFAOYSA-N butan-1-olate;dibutyltin(2+) Chemical compound CCCCO[Sn](CCCC)(CCCC)OCCCC RGCPMRIOBZXXBR-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/088—Removal of water or carbon dioxide from the reaction mixture or reaction components
- C08G18/0885—Removal of water or carbon dioxide from the reaction mixture or reaction components using additives, e.g. absorbing agents
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
A kind of preparation method of double-component cold curing cast polyurethane resin, be characterized in the PPG component, adding the composite catalyst of organic tin compound and organic amine and going damp agent, and after damp agent is gone in adding, heat decompression dehydration to remove moisture wherein as far as possible.The present invention has overcome the shortcoming that existing " one-step method " produces, control easily on the technology, be 0.5-2 hours curing time, and reduced the pore in the polymer, prolonged the period of storage of component, the resin of its production is electric and mechanical and physical performance is good, be suitable for 35KV and 35KV following in, the insulation and the embedding of lv power cable joint.
Description
The present invention relates to the preparation method of a kind of electric cable accessories with the polyurethane casting resin.
The preparation of used dual-component polyurethane casting resin in the cable construction process at present, can be divided into " one-step method " and two-step method on the technology "; but, make solidfied material inside produce pore and influence its electric and mechanical and physical performance easily because the reaction speed and the product quality of " one-step method " technology are wayward.For this reason, the someone proposes polymer polyatomic alcohol component (A component) dehydration under high temperature decompression, (spy opens clear 50-103596) but because the easy moisture absorption of A component, even generally have only about half a year following storage period in the situation of airtight package; Simultaneously, this patent is in order to accelerate curing reaction speed, the propylene oxide adduct that in the A component, adds ethylenediamine, this polyamine alcohol is catalyst, be again chain extension, crosslinking agent, curing reaction is speeded up arrive several minutes to tens seconds, so that can't carry out pouring operation, the pore in the polymer also is difficult to avoid.So, people adopt " two-step method " (being the pre-polymerization method) more, promptly earlier with excessive vulcabond and polymer polyatomic alcohol reaction prepolymer, in prepolymer, add mixing diluents again and become the A component, the B component adopts organic diamine system or dihydroxylic alcohols system cahin extension agent or the crosslinking agent as the A component, further carry out chain extension and cross-linking reaction after A, B two components mix and reach curing (WO 86/00166, and US 4168363).Though this method is control easily qualitatively, but complex technical process, curing rate is slow, and the diluent (mostly being mineral oils) that adds is to the shield semiconductors material production harmful effect of the above twisted polyethylene cable of 10KV, and therefore the polyurethane resin of " two-step method " preparation generally can only be used for the construction of lv power cable and telecommunication cable.
The objective of the invention is to adopt a kind of new " one-step method " prepared dual-component polyurethane casting resin, this method is control easily on technology, and can improve the bin stability of A, B component and the pore in the minimizing solidfied material, thereby improve the electric property of solidfied material, mechanical and physical performance.
The object of the present invention is achieved like this: add the curing reaction of a kind of suitable catalyst under regulating the room temperature and finished in 0.5-2 hour, simultaneously, for avoiding producing pore in the solidfied material, in the A component, add and go in right amount to heat decompression dehydration again after the damp agent, water content in the A component is reduced to below 0.05%, and make damp agent still have the activity of sufficient absorption moisture content, like this, the A component is protected under the dress situation in sealing has the storage life in 1～2 year.Because, solving the key that polymer produces this problem of pore, except that the control curing rate, also the A component fully to be dewatered.The present invention adopts the binary composite catalyst of organic tin compound and organic amine, and being controlled at curing time in 0.5～2 hour the scope, this suits to cable construction effectively.Organic tin compound such as stannous octoate, dibutyl dibutoxy tin, dibutyl tin dilaurate etc., organic amine has triethylamine, triethanolamine, dimethylethanolamine, tetramethyl butane diamine etc., and the ratio that organic tin compound and organic amine can 1: 1 mixes.The damp agent of going that the present invention adopts is a zeolite powder, the main component polymer polyatomic alcohol can adopt conventional method in the A component, as PPG, PEPA, but consider from convenience, solidfied material hydrolysis stability, electrical insulating property and source, the price factors of pouring operation, should preferentially adopt PPG, propylene oxide adduct as trihydroxy alcohols such as trimethylolpropane, glycerol, ethylene glycol, propylene glycol, dihydroxylic alcohols, also can adopt the natural polymer polyalcohol, as the castor-oil plant wet goods.Chain extender in the A component adopts conventional low-molecular-weight diol or trihydroxy alcohol, and its average molecular weight range is 60-600, as 1,4-butanediol, 2-ethyl-1,3-ethylene glycol, N, N-(2-hydroxypropyl) aniline etc. all can adopt.What deserves to be mentioned is that the intensity etc. that the use amount of PPG will be considered the viscosity, intermiscibility, reactivity of component simultaneously and generate solidfied material in the A component both can adopt single PPG, also can adopt compound PPG.The comprehensive above-mentioned factors of the present invention considers, total hydroxyl value of PPG in the A component is controlled at 150-300(milligram KOH/ gram) scope in.Consisting of of A component:
100 parts of PPGs (weight)
Go damp agent 4-20 part (weight)
Catalyst 0.01-0.1 part (weight)
Chain extender 0.5-5 part (weight)
B component of the present invention can adopt conventional organic multiple isocyanate, as TDI(cresylene vulcabond), the MDI('-diphenylmethane diisocyanate), many phenyl of PAPI(polymethine polyisocyanates), sex change MDI, hexamethylene vulcabond etc.The present invention considers the convenience of toxicity and use, and preferentially selecting low-volatile liquid MDI(for use is sex change MDI) or PAPI.Be to suppress MDI(or PAPI) autohemagglutination, adding an amount of benzoyl chloride is that stabilizer is to improve its bin stability.Consisting of of B component:
Polyisocyanates 50-70 part (weight)
Benzoyl chloride stabilizer 0.01-0.05 part (weight)
The addition of polyisocyanates should decide according to the equivalent proportion of the hydroxyl in isocyanate group and the A component, and the present invention control-NCO/-OH equivalent proportion is 0.9-1.6.
The present invention compares with existing " one-step method ", control easily on the technology, curing reaction was finished in 0.5-2 hour, suitable cable construction, prolonged A simultaneously, the bin stability of B component, solved preferably in the prior art and produced the problem of pore because of the A component moisture absorption makes solidfied material, its electric property of polyurethane casting resin and mechanical and physical performance with this method preparation are all good, can replace the epoxy cold casting agent of commonly using, in being applicable to that 35KV and 35KV are following, exhausted and the embedding of the terminal fitting of lv power cable and the edge of transition joint also can be used for the construction of telecommunication cable and the embedding and embedding of other electric fittings.
The made resin of the present invention is tested through Hunan Province's plastics industry quality monitoring test centre, and its main mechanical and physical performance data are listed in table 1.
The propylene oxide adduct of embodiment 1, trimethylolpropane (hydroxyl value 350) 50 grams, trihydroxy polyethers (hydroxyl value 56) 50 grams, 1,4-butanediol 1 gram, zeolite powder 6 grams, 1: 1 triethylamine and the mixed liquor of stannous octoate 0.1 gram fully mixes, and becomes the A component after under 120-140 ℃, the condition of 3-10mmHg decompression dehydration 1-3 hour.54 gram PAPI and 0.02 gram benzoyl chloride mixed liquor become the B component.At room temperature A, B two components fully mix, and water to cast from the model, survey the curing reaction maximum temperature at its material center, are cured to the main electric property of elastomeric time and polymer.Data are listed in table 2.
Embodiment 2
Trihydroxy polyethers (hydroxyl value 480) 30 grams, trihydroxy polyethers (hydroxyl value 56) 70 grams, 1,4-butanediol 1 gram, zeolite powder 8 grams, 1: 1 triethanolamine and dibutyl tin laurate mixed liquor 0.08 gram, fully mix, after carrying out decompression dehydration under the condition of example 1, become the A component.The PAPI50 gram, benzoyl chloride 0.02 gram, mixing becomes the B component.As a rule 1 condition is cast and is tested, and data are listed in table 2.
Embodiment 3
Trihydroxy polyethers (hydroxyl value 280) 100 grams, glycerol 1 gram, dioctyl phthalate (as plasticizer) 8 grams, zeolite powder 10 grams, 1: 1 triethanolamine and dibutyl tin laurate mixed liquor 0.06 gram fully mix, and become the A component after dewatering under example 1 condition.PAPI70 gram, benzoyl chloride 0.03 gram mixes and becomes the B component, casts and tests according to the method for example 1, and data are listed in table 2.
Claims (7)
1, a kind of electric cable accessories preparation method of polyurethane casting resin, make in next step curing of room temperature by A, B two components, the A component comprises polymer polyatomic alcohol and chain extender, the B component is a polyisocyanates, this method is characterised in that and adds zeolite powder in the A component for going damp agent, the mixture of organic tin compound and organic amine is a composite catalyst, under the heating reduced pressure A component is dewatered then, and total hydroxyl value of polymer polyatomic alcohol is 150-300 (a milligram KOH/ gram).
2, method according to claim 1 is characterized in that the equivalent proportion of hydroxyl in isocyanate group and the A component (NCO/-OH) is 0.9-1.6.
3, method according to claim 1 is characterized in that consisting of of A, B component:
100 parts of A polymer polyatomic alcohols (weight)
Go damp agent 4-20 part (weight)
Catalyst 0.01-0.1 part (weight)
Chain extender 0.5-5 part (weight)
B polyisocyanates 50-70 part (weight)
Benzoyl chloride 0.01-0.05 part (weight)
4,, it is characterized in that polymer polyatomic alcohol is a PPG according to claim 1 or 3 described methods.
5,, it is characterized in that polyisocyanates is liquid MDI or PAPI according to claim 1 or 3 described methods.
6, method according to claim 1 is characterized in that organic tin compound and organic amine were with 1: 1 ratio.
7, method according to claim 1 is characterized in that under 120-140 ℃, 3-10mmHg condition the A component being dewatered 1-3 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102104 CN1008672B (en) | 1987-11-05 | 1987-11-05 | The electric cable accessories preparation method of polyurethane casting resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102104 CN1008672B (en) | 1987-11-05 | 1987-11-05 | The electric cable accessories preparation method of polyurethane casting resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1033895A true CN1033895A (en) | 1989-07-12 |
| CN1008672B CN1008672B (en) | 1990-07-04 |
Family
ID=4813814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87102104 Expired CN1008672B (en) | 1987-11-05 | 1987-11-05 | The electric cable accessories preparation method of polyurethane casting resin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008672B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001064229A1 (en) * | 2000-02-29 | 2001-09-07 | Jun Ho Co., Ltd. | A medicine for treating obesity and the method of producing thereof |
| CN1302072C (en) * | 2005-10-12 | 2007-02-28 | 太原理工大学 | Modified polyurethane composition and preparation thereof |
| CN100389164C (en) * | 2006-07-12 | 2008-05-21 | 山东恒冠化工科技有限公司 | Waterproof sealing agent for wires, cables and terminals and its prepn |
| CN102127294B (en) * | 2005-09-13 | 2012-11-21 | 陶氏环球技术有限责任公司 | Distannoxane catalysts for silane crosslinking and condensation reactions |
| WO2017219344A1 (en) * | 2016-06-24 | 2017-12-28 | Dow Global Technologies Llc | Metalized polyurethane composite and process of preparing the same |
| CN109517138A (en) * | 2018-11-21 | 2019-03-26 | 苏州九维电气制造有限公司 | Cast polyurethane resin and cast polyurethane resin preparation method |
| CN112812681A (en) * | 2021-02-08 | 2021-05-18 | 国网山东省电力公司济南供电公司 | Room temperature curing waterproof flame-retardant bi-component polyurethane casting resin and preparation method thereof |
-
1987
- 1987-11-05 CN CN 87102104 patent/CN1008672B/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001064229A1 (en) * | 2000-02-29 | 2001-09-07 | Jun Ho Co., Ltd. | A medicine for treating obesity and the method of producing thereof |
| CN102127294B (en) * | 2005-09-13 | 2012-11-21 | 陶氏环球技术有限责任公司 | Distannoxane catalysts for silane crosslinking and condensation reactions |
| CN1302072C (en) * | 2005-10-12 | 2007-02-28 | 太原理工大学 | Modified polyurethane composition and preparation thereof |
| CN100389164C (en) * | 2006-07-12 | 2008-05-21 | 山东恒冠化工科技有限公司 | Waterproof sealing agent for wires, cables and terminals and its prepn |
| WO2017219344A1 (en) * | 2016-06-24 | 2017-12-28 | Dow Global Technologies Llc | Metalized polyurethane composite and process of preparing the same |
| CN109517138A (en) * | 2018-11-21 | 2019-03-26 | 苏州九维电气制造有限公司 | Cast polyurethane resin and cast polyurethane resin preparation method |
| CN109517138B (en) * | 2018-11-21 | 2021-04-23 | 苏州九维电气制造有限公司 | Polyurethane casting resin and preparation method thereof |
| CN112812681A (en) * | 2021-02-08 | 2021-05-18 | 国网山东省电力公司济南供电公司 | Room temperature curing waterproof flame-retardant bi-component polyurethane casting resin and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1008672B (en) | 1990-07-04 |
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