Millable silicone rubber composition, millable silicone rubber sponge, and method for producing said sponge

一种硅橡胶组合物、制造方法的技术，应用在建筑物构造、胶粘剂、门/窗的特殊设备等方向，能够解决硅橡胶海绵物性恶化等问题，达到尺寸精度优异的效果
CN109563294AActive Publication Date: 2019-04-02SHIN ETSU CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHIN ETSU CHEM CO LTD
Publication Date
2019-04-02

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Abstract

Provided are a millable silicone rubber composition, a millable silicone rubber sponge, and a method for producing said sponge. A method for producing a millable silicone rubber sponge having an opencell content of 20% or higher that heat treats at 200 DEG C or higher a silicone rubber composition of components (A)-(E): (A) organopolysiloxane having a degree of polymerization of 3000 or higher and having at least two alkenyl groups per molecule represented by the average compositional formula (I): R1 aSiO4-a / 2 [in the formula, R1 represent the same or different monovalent hydrocarbon groups and a represents a positive number of 1.95-2.04], (B) reinforcing silica, (C) thermally expandable microcapsules having an expansion start temperature of 90-150 DEG C that shrink 20% or more from the maximum expansion volume by heating for five minutes at 200 DEG C, (D) curing agent: organic peroxide, and (E) open cell-forming agent: solid high temperature decomposition-type organic foaming agent having a decomposition start temperature of 180 DEG C or higher, that contains a component that begins to decompose after curing of component (A) .
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Description

technical field

[0001] The present invention relates to a kneading type silicone rubber composition, a kneading type silicone rubber sponge, and a method for producing the sponge by continuous foaming. Background technique

[0002] The silicone rubber sponge is a sponge having excellent physical properties such as heat resistance, cold resistance, electrical insulation, and flame retardancy peculiar to silicone rubber, and has excellent physical properties such as small compression set. In order to promote low heat conduction and light weight, silicone rubber sponges with such characteristics are used in OA equipment, automobiles, and construction materials.

[0003] Silicone rubber sponges are manufactured by various methods, such as molding / crosslinking methods and foaming methods of silicone rubber, depending on the application. As one of the foaming methods, there is a method of mixing heat-expandable resin particles (heat-expandable microcapsules) enclosed in a solvent...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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