A kind of preparation method of comb structure organosilicon-polyurethane copolymer

A comb-like structure, silicone technology, applied in coatings, adhesives, etc., can solve the problems of insufficient weather resistance, poor compatibility, etc., to enhance thermal stability and weather resistance, reduce the difference in solubility parameters, and make up for performance defects. Effect

Active Publication Date: 2021-04-13
江西瑭泽化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The object of the present invention is to provide a method for preparing a comb-shaped structure organosilicon-polyurethane copolymer for the problems of poor compatibility of silicone materials and insufficient heat resistance and weather resistance of polyurethane materials in the prior art. Excellent temperature resistance and weather resistance make it have excellent application prospects in the fields of release agents, coatings, and sealants

Method used

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  • A kind of preparation method of comb structure organosilicon-polyurethane copolymer

Examples

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Embodiment 1

[0032]14.8 g of 5 methyldiloxane is mixed with 109.0 g of tetramethyl tetraphenylcyclo tetrahydiloxane, adding 2000 ppm sulfuric acid, heating to 60 ° C for 4 hours, over quantified sodium hydrogencarbonate and post filtration, and then 9.2 g of a propylene glycol was added, and 1 hour was reacted at 100 ° C to give a single endolytic hydroxy-blockphenyl modified silicone to be used;

[0033]59.3 g of octazetic ring tetra siloxane with 12.5 g of 1,3-bis (3-aminopropyl) -1,1,3,3-tetramethylsiloxane, 2000 ppm sulfuric acid, heated to 60 When the reaction was reacted for 6 hours, it was filtered through sodium bicarbonate to obtain an amino-sealing polysiloxane to be used;

[0034]34.8 g of toluene diisocyanate was mixed with 50.0 g of a polyhexidide diol of 50.0 g of a molecular weight of 1000, and 100 ppm triendylene diamine was added, and at 60 ° C for 3.5 hours, then the above-mentioned single-end polyhydroxy-blockphenyl group was added. The modified silicone and amino-blocking polysilox...

Embodiment 2

[0036]14.8 g of 5 methyldiloxane is mixed with 396.7 g of phenylcyclized tetra siloxane, adding 2000 ppm sulfuric acid, heating to 70 ° C for 8 hours, over quantitative sodium hydrogencarbonate and post filtration, and add to the filtrate 9.2 g of propylene glycol, 120 ° C for 2 hours, resulting in single-end polyhydroxy-blockphenyl modified polysiloxane to be used;

[0037]148.3 g of dimethylsiloxane mixed ring was mixed with 55.2 g of 1,3-bis (3-aminobutyl) -1,1,3,3-tetramethyl siloxane, and 2000 ppm sulfuric acid, heated to The reaction was reacted at 40 ° C for 8 hours, and the sodium hydrogencarbonate was filtered to give an amino-sealing polysiloxane to be used;

[0038]67.3 g of hexamethylene diisocyanate was mixed with 40.0 g of a polyethylene glycol having a molecular weight of 400 to add 200 ppm bis-(3-dimethylpropanamine) amine, reacted at 70 ° C for 2.5 hours, and added to the above obtained Single-end polyhydroxy-blocking phenyl modified silicone and amino-blocking polysiloxa...

Embodiment 3

[0040]14.8 g of 5 methyldiloxane with 163.5 g of trimethyltrimidal cycloalkane, 2000 ppm sulfuric acid, heated to 40 ° C for 6 hours, over-quantium hydrogencarbonate and post filtration, and then 9.2 g of propylene glycol was added to 110 ° C for 1 hour, and the single-ended polyhydroxy-blockphenyl modified polysiloxane is to be used;

[0041]222.3 g of a decaglatylcyclohydiloxane is mixed with 27.7 g of 1,3-bis (4-aminobutyl) tetramethylene siloxane, adding 2000 ppm sulfuric acid, heating to 70 ° C for 4 hours, sodium bicarbonate Neutralization is filtered to obtain an amino-sealing polysiloxane to be used;

[0042]75.2 g of diphenyl dimethyl diisocyanate was mixed with an 80.0 to molecular weight of 1000 of polycapralcarbonate diol, and 200 ppm three (dimethyl) amine was added, and the reaction was reacted at 80 ° C for 1.5 hours, and then the above obtained Single-ended polyhydroxy-blockphenyl modified silicone and amino-blocking polysiloxane, and 200 g of butidone for dilution, contin...

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Abstract

The invention discloses a preparation method of a comb-like structure organosilicon-polyurethane copolymer, which is to prefabricate single-end polyhydroxyl-terminated phenyl-modified polysiloxane and amino-terminated polysiloxane, and then use polyisocyanate React with polyols and the above two modified polysiloxanes successively, and then undergo chain extension to obtain a comb-shaped structure silicone-polyurethane copolymer. The polymer prepared by the present invention has the advantages of both polyurethane and polysiloxane. On the one hand, it has good mechanical and physical properties such as cohesiveness, adhesion, wear resistance, and extensibility, so that the overall material can be well applied to various Surface and interface occasions; on the other hand, it strengthens the thermal stability and weather resistance of the polymer as a whole, expands the application range of the product, and makes it have excellent application prospects in the fields of mold release agents, coatings, and sealants.

Description

Technical field[0001]The present invention belongs to the field of modified polyurethane synthesis, and in particular, the present invention relates to a method of preparing a comb structure silicone-polyurethane copolymer.Background technique[0002]The silicone material is made of a special molecular structure and composition of the Si-O-Si backbone and an organic side chain, which has both excellent heat resistant oxidation resistance, cold resistance, low ultraviolet absorption, electrical insulation, weather resistance, corrosion resistance. The excellent characteristics of the series also provide high elasticity, plasticity, biological compatibility, etc., known as the "industrial taste" of modern industrial and science and technology, but lower polarity, resulting in lower compatibility with other organic materials. This limits its application in many fields.[0003]Polyurethane is a kind of polymer polymer that has developed rapidly in recent years, and its molecular chain conta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/458C08G77/16C08G77/26C08G77/06C08L83/10C09D183/10C09J183/10
CPCC08G77/06C08G77/16C08G77/26C08G77/458C08L83/10C09D183/10C09J183/10
Inventor 周晖卢裕灿洪双
Owner 江西瑭泽化工有限公司
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