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Organopolysilmethylene and a composition comprising the same

A technology of polymethylene siloxane and polysiloxane, which is applied in the field of organopolymethylene siloxane and organopolymethylene siloxane composition, can solve the problem of poor processability, expensive, Difficult to synthesize and other problems, to achieve the effect of excellent heat resistance

Active Publication Date: 2013-04-17
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since diaryl-based silicon methylene polymers are highly crystalline thermoplastic polymers, they are difficult to synthesize, expensive, and poor in processability.

Method used

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  • Organopolysilmethylene and a composition comprising the same
  • Organopolysilmethylene and a composition comprising the same
  • Organopolysilmethylene and a composition comprising the same

Examples

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example

[0086] Hereinafter, examples and comparative examples are shown to explain the present invention in more detail, but the present invention is not limited to the following examples. In addition, in the following content, "parts" means parts by weight, Me means methyl, and Vi means vinyl.

example 1

[0088] (A1) Synthesis of alkenyl-containing organopolymethylene siloxane

[0089] Dissolve 1540 g (4.64 mol, 90 mol%) of chlorine-containing methylene silicon of the following formula (6) and 54.2 g (0.45 mol, 10 mol%) of dimethylvinyl monochlorosilane of the following formula (7) In 1000 g of xylene, it was added dropwise to a mixed solvent system of 600 g of water and 300 g of xylene at 60°C to perform a hydrolysis reaction. Then, after the maturation reaction was performed at room temperature for 3 hours, the waste acid was separated, washed with water, and azeotropic dehydration was performed at 140°C.

[0090] [化11]

[0091]

[0092] [化12]

[0093]

[0094] 0.2g of KOH was added to the polymethylene silicate with the introduction of alkenyl groups, and the reaction was carried out at 140°C for 10 hours to carry out alkali polymerization, followed by neutralization, filtration, and separation at 160°C / 5mmHg for 30 minutes. ). As a result of analysis by 1H-NMR, it was found that...

example 2

[0098] (A2) Synthesis of alkenyl-containing organopolymethylene siloxane

[0099] Combine 260.3 g (0.335 mol, 67 mol%) of chlorine-containing methylene silicon of the following formula (9) and 19.9 g (0.165 mol, 33 mol%) of dimethylvinyl monochlorosilane of the above formula (7) with Example 1 was similarly dissolved in 200 g of xylene, and was added dropwise to a mixed solvent system of 200 g of water and 100 g of xylene at 60° C. to perform a hydrolysis reaction. Then, the maturation reaction was carried out at room temperature for 5 hours. Then the waste acid is separated, washed with water, and azeotropic dehydration is performed at 140°C. 0.2g of KOH was added to the polymethylene silicate with the introduction of alkenyl groups, reacted at 140°C for 10 hours to carry out alkali polymerization, and then neutralized and filtered, and then separated at 160°C / 5mmHg for 30 minutes. The alkenyl group-containing organopolymethylene silicone siloxane (A2) of the following formu...

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Abstract

The present invention provides an organopolysilmethylene represented by the following general formula (1): wherein R 1 is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a hydroxy group, R 3 SiCH 2 - and R 3 SiO-, wherein R is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and a hydroxy group, m is an integer of 1 to 100, and n is an integer of 1 to 100, and wherein at least two out of R 1 's and R's are an alkenyl group.

Description

Technical field [0001] The present invention relates to an addition curing type organopolysilmethylenesiloxane that forms a cured product having excellent heat resistance, mechanical strength, electrical insulation, electrical properties, and water resistance, and a combination of the organic The composition formed by polymethylene siloxane and its curing agent. Background technique [0002] Previously, curable silicone rubber compositions that are cured to form silicone rubber elastomers have been widely known, and are widely used as linings for electrical and electronic parts due to their excellent properties such as weather resistance, heat resistance, and electrical insulation. Gasket materials, potting materials, coating materials, molding materials and other molding materials, wire coating materials, etc., and automotive parts. However, the curable silicone rubber composition has a siloxane bond unique to silicone, so due to its ionic bond, it cannot exhibit chemical resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/50C08L83/14C08L83/05C08L83/04
CPCC08L83/14C08G77/50C08G77/20C08G77/12C08L83/00C08G77/04C08L83/04
Inventor 柏木努塩原利夫
Owner SHIN ETSU CHEM IND CO LTD