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Organic foaming silicone rubber

A foaming silicone rubber, organic technology, applied in the field of silicone rubber production, can solve the problems of difficulty in achieving ideal foaming uniformity, incompatibility, etc., and achieve the effects of improving reaction cross-linking points, improving uniformity and uniform cells.

Active Publication Date: 2016-06-08
浙江凌志新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] By consulting the literature, we found that in the existing patents and literature reports, such as the invention patent of application number 201410623724.1, the invention patent of application number 201010196930.0, the invention patent of application number 201410785157. "(Organic silicon materials, 2014.28(4): 272-276), all need to use foaming agent, silicon hydrogen (Si-H) group and silicon hydroxyl group (Si-OH) or carbon hydroxyl group (C-OH) are respectively located Different molecules, so the fineness and uniformity of foaming are affected by stirring speed, mixing time, etc.
Even if the mixing is very good, it will be difficult to achieve the ideal level of foaming uniformity due to microscopic incompatibility and inhomogeneity, barrier effect of inorganic fillers, steric hindrance of macromolecules, etc.

Method used

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  • Organic foaming silicone rubber

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Experimental program
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Effect test

Embodiment approach

[0030] An organic foamed silicone rubber, which is prepared by mixing the following raw material components in parts by weight: 100 parts of hydroxyl-terminated hydrogen-containing polysiloxane, 5-50 parts of vinyl silicone oil, and 5-40 parts of white carbon black. 0.2-2 parts of inhibitor, 0.1-1 part of platinum catalyst.

[0031] The preparation method of the hydroxyl-terminated hydrogen-containing polysiloxane is: using octamethylcyclotetrasiloxane and tetramethylcyclotetrasiloxane as raw materials, octamethylcyclotetrasiloxane: tetramethylcyclotetrasiloxane Molar ratio of siloxane = 0.5:1 to 2:1. The solid acid is used as a catalyst to carry out the ring-opening reaction. The amount of the solid acid is 0.1%-1.5% of the total weight of octamethylcyclotetrasiloxane and tetramethylcyclotetrasiloxane. The solid acid is acid clay, macroporous Cationic resin or strongly acidic cation exchange resin. Equilibrium reaction at 120°C-180°C for 1-4 hours, then add water for cappin...

Embodiment 1

[0035] 11.3Kg of D 4 (octamethylcyclotetrasiloxane, commercially available) and 100Kg of D 4 H (tetramethylcyclotetrasiloxane, commercially available), under the catalysis of 1.67Kg of macroporous cationic resin (commercially available, such as DuPont's Nafion501), add 5Kg of water for 1.5 hours after the equilibrium reaction at 120°C for 4 hours Carry out capping, then remove low boilers under the condition of vacuum degree -0.09Mpa, and then pressurize and filter under the condition of pressure 0.3MPa to obtain 103.5Kg of hydrogen-containing hydrogen-containing polysilicon with a hydrogen mass fraction of 1.5%. oxane.

[0036] Add 100 parts of the above-mentioned self-made hydroxyl-terminated hydrogen-containing polysiloxane with a mass fraction of 1.5% to the container, and vinyl silicone oil (α, ω-divinyl polydimethylsiloxane) with a viscosity of 50,000 mpa.s 40 parts, 10 parts of fumed silica (commercially available) treated with hexamethyldisilazane, 1.8 parts of 3-phe...

Embodiment 2

[0038] 67Kg D 4 and 100Kg of D 4 H, under the catalysis of 1.67Kg of acid clay, balance reaction at 150°C for 2 hours, then add 4Kg of water to react for 2 hours to capping, then remove low boilers under vacuum -0.05Mpa, and then press 0.5MPa Under pressure filtration under the conditions of 153.6Kg hydrogen-containing mass fraction of 1.0% hydroxyl-terminated hydrogen-containing polysiloxane.

[0039]Add 100 parts of the self-made hydroxyl-terminated hydrogen-containing polysiloxane with a mass fraction of 1.0% to the container, and vinyl silicone oil (α, ω-divinylpolydimethylsiloxane) with a viscosity of 5000mpa.s 30 parts, 20 parts of fumed silica (commercially available) treated with hexamethyldisilazane, 1.0 parts of 3-phenyl-1-butyn-3-ol and stir well, then add 0.6 parts of platinum The isopropanol solution of chloroplatinic acid with a content of 5000ppm is poured into the mold after rapid stirring. After 30 minutes, the foaming is completed, the pores of the foamed ...

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Abstract

The invention discloses organic foaming silicone rubber. The organic foaming silicone rubber is prepared by mixing, by weight, 100 parts of hydroxy-terminated hydrogen-containing polysiloxane, 5-50 parts of vinyl silicone oil, 5-40 parts of white carbon black, 0.2-2 parts of a reaction inhibitor and 0.1-1 part of a platinum catalyst. The foaming ratio can be controlled flexibly, reaction cross-linking points are increased, stability is good, foaming is uniform, and a foaming agent does not need to be used.

Description

technical field [0001] The invention relates to the technical field of silicone rubber production, in particular to an organic foamed silicone rubber. Background technique [0002] Foam silicone rubber is a new type of multi-functional rubber material, which is a porous polymer elastomer formed after foaming process. In addition to the excellent properties of silicone rubber, foamed silicone rubber also has the advantages of low density, light weight, good resilience, and good damping performance. It also has the advantages of high and low temperature resistance, weather resistance, and environmental protection that other foam materials do not have. Foam material has become an excellent material, and its applications involve aviation, aerospace, atomic energy, medicine, environmental protection, metallurgy, mechanical construction and petrochemical industries, and can be used for separation, filtration, air distribution, noise absorption and vibration absorption, packaging, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08L83/07C08K9/06C08K3/36C08J9/02C08G77/38
CPCC08G77/38C08J9/02C08J2383/06C08J2483/04C08L83/06C08L2203/14C08L2205/02C08L83/04C08K9/06C08K3/36
Inventor 陈世龙张春晖杨静柳时允张宝华
Owner 浙江凌志新能源科技有限公司
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