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Composition for preparing organic silicon elastomer, organic silicon elastomer and preparation method and application thereof

A composition and elastomer technology, applied in chemical instruments and methods, other chemical processes, coatings, etc., which can solve problems such as difficulty in complete curing and easy release of volatile organic compounds

Inactive Publication Date: 2010-08-11
HENKELCHINAINVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method that can avoid the above-mentioned problems, and can overcome the defects that the existing organic silicon compound curing methods are easy to release volatile organic compounds or need to use heavy metal catalysts, or are difficult to completely cure. A composition for preparing a silicone elastomer for obtaining a silicone elastomer with excellent performance, a silicone elastomer and its preparation method and application

Method used

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  • Composition for preparing organic silicon elastomer, organic silicon elastomer and preparation method and application thereof
  • Composition for preparing organic silicon elastomer, organic silicon elastomer and preparation method and application thereof
  • Composition for preparing organic silicon elastomer, organic silicon elastomer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] In the special polypropylene cup of 300ml speedmixer, add polymer A and 9.34g reactant B (trimethylolpropane-three [3-(2-methyl aziridinyl) propionic acid that 126g reference example 1 makes) ester], 0.02mol), and then stirred at 3000rpm in a speedmixer for 1.5min. Reactant A and reactant B are mixed and cured completely at room temperature (25°C) within 1 hour to obtain a silicone elastomer (5% weight loss temperature Td under nitrogen) 5 is 324.7°C, and the thermal decomposition temperature is 535.0°C). Before the curing reaction, the composition composed of polymer A and compound B has good fluidity and strong operability, see figure 2 . After the curing reaction, the obtained silicone elastomer is transparent, see image 3 .

Embodiment 2

[0114] Add polymer A and 78g reactant B (trimethylolpropane-three [3-(2-methyl aziridinyl) propionate] that 400g reference example 2 makes in the special-purpose polypropylene cup of 500ml speedmixer , 0.17mol), and then stirred for 1.5min at 3000rpm in a speedmixer mixer. Reactant A and reactant B are mixed and cured completely at room temperature for 0.5 h to obtain a silicone elastomer.

Embodiment 3

[0116] Add polymer A of 60g reference example 3 and 0.58g reactant B (trimethylolpropane-three [3-(2-methylazirinyl) propionate]) in the special polypropylene cup of 100ml speedmixer , and then stirred at 3000 rpm for 1.5 min in a speedmixer mixer. Polymer A and compound B are mixed and cured completely at room temperature for 24 hours to obtain a silicone elastomer.

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Abstract

The invention discloses a composition for preparing organic silicon elastomer, which contains polymer A and compound B, wherein the polymer A is silicones polymer containing at least two carboxyl groups, the compound B contains at least two aziridine rings, and the mol ratio of the carboxyl groups of the polymer A to the aziridine rings of the compound B is 1:0.2-10. The invention further discloses a method for preparing organic silicon elastomers by using the composition, and an organic silicon elastomer and application thereof.

Description

technical field [0001] The invention relates to a composition for preparing a silicone elastomer, a silicone elastomer, a preparation method and application thereof. Background technique [0002] Traditional silicone curing methods mainly include condensation type and hydrosilylation type, among which condensation type mainly includes deacidification type, deoxime type, dealcoholization type, deamination type, deamidation type, dehydroxylamine type and deacetone type, etc. There are some defects in the above silicone curing methods (Edited by Feng Shengyu et al., Silicone Polymers and Their Applications, P116-152): [0003] 1. The condensation type silicone curing method will release small molecule volatile organic compounds (VOC) such as alcohol, acid, acetone and amine during the curing reaction, which is not friendly to the environment. [0004] 2. The condensation type silicone curing method needs to react in a certain humidity environment. Therefore, the curing speed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/08C08K5/3412C08G77/388C09D183/08C09J183/08C09K3/10
Inventor 张宜荣张立伟张勇
Owner HENKELCHINAINVESTMENT
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