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Silastic composition and preparation method thereof

A silicone rubber composition and a technology for the composition, applied in the rubber field, can solve the problems of high use cost, high material cost, expensive equipment investment, etc., and achieve the effects of dimensional stability and low vulcanization temperature

Active Publication Date: 2011-06-29
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2.4 Dichlorobenzoyl peroxide is referred to as "Double 24", which is mainly used for hot air vulcanization molding above 120°C, such as the production of silicone rubber pipes, wires and plates. The use of "Double 24" will cause silicone rubber products to remain Vulcanizing agent decomposition products produce peculiar smell and are prone to "blooming" phenomenon
[0005] The Chinese patent with the publication number CN1903921A discloses a two-component platinum catalyst vulcanizing agent and its preparation method. This vulcanizing agent replaces the peroxide vulcanizing agent. Although it can also make silicone rubber products tasteless, the mixing of the current market Silicone rubber is added with hydrogen-containing silicone oil as an anti-yellowing agent, which makes the vulcanization performance of the platinum catalyst vulcanizer produce some uncertain variables, and the use cost is high
[0006] The Chinese patent whose publication number is CN1644624A also discloses a silicone rubber composition and a manufacturing method thereof, but the silicone rubber composition belongs to a liquid silicone rubber composition, and static mixing injection equipment is required for use, and the equipment investment is expensive. The high cost of materials is not conducive to popularization and use

Method used

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  • Silastic composition and preparation method thereof
  • Silastic composition and preparation method thereof
  • Silastic composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] 1. Preparation of mixing base rubber: in parts by mass:

[0064] 30 parts of polymethylvinylsiloxane I (molecular weight: 600,000, vinyl mole percent content 0.05%), polymethylvinylsiloxane II (molecular weight: 600,000, vinyl mole percent content: 0.25%) 40 parts, 5 parts of polymethylvinylsiloxane III (molecular weight 600,000, vinyl molar percentage 5%), 8 parts of α, ω-dihydroxy polydimethylsiloxane (viscosity 20000mpas) and 2 parts Part viscosity is 50mm at 25°C 2 / s of hydroxy silicone oil was put into a vacuum kneader, mixed evenly, and then 38 parts of precipitated silicon dioxide zeosil-132 (produced by Rodia Korea Company) were added in several times, and finally 0.3 part of zinc stearate was added to form After the large group, control the temperature at 170°C, vacuum degree of about 0.09MPa, heat treatment for 3 hours, filter and cool for later use.

[0065] 2. Preparation of component A:

[0066] Put 150 parts by mass of the above-mentioned mixing base r...

Embodiment 2

[0073] When preparing component A, the platinum complex is diluted with polymethylvinylsiloxane II and then added to the mixing base rubber. When preparing component B, use 16 parts by mass of hydrogen-containing silicone oil (hydrogen-containing mass content of 0.6 %), others are with embodiment 1.

Embodiment 3

[0075] When preparing component A, the platinum complex is diluted with polymethylvinylsiloxane III and then added to the mixing base rubber. When preparing component B, use 8 parts by mass of hydrogen-containing silicone oil (hydrogen-containing mass content 1.6 %), others are with embodiment 1.

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Abstract

The invention relates to a silastic composition and a manufacturing method thereof. The silastic composition comprises a component A and a component B, the component A is composed of mixing base adhesive and platinum coordination complex, whereas the component B is composed of the mixing base adhesive, hydrogen-containing silicone oil, a thickening agent and a depressor; the mixing mass ratio is:component A: component B is 0.5-99:1-99.5. The silastic composition of the invention is a solid-state mixing silastic containing platinum curing ingredient, so no curing ingredient is needed in the process of molding, besides, the vulcanization effect is good, the vulcanization moulding temperature is low, thus saving electricity, reducing exhaust emission and improving productivity; moreover, the silastic product is odorless and has fine physical and mechanical properties.

Description

Technical field: [0001] The invention belongs to the technical field of rubber, in particular to a silicone rubber composition and a preparation method thereof. Background technique: [0002] Silicone rubber has excellent high and low temperature resistance, weather resistance, electrical insulation and physiological inertia, etc., and is widely used in aerospace, electronic and electrical, construction, automotive machinery and other industries, as well as medical and health, and various fields of daily life. The main application forms of silicone rubber are various vulcanized products, including various rubber sheets, gaskets, cups, valves, films, shock absorbers, electrical plugs, rubber rollers, potentiometer insulating sleeves, waveguides and Buttons; various rubber hoses, rubber strips, rubber ropes, wire and cable sheaths in extrusion products, and gaskets, diaphragms, and isolation cloths in tape products. [0003] At present, most of the silicone rubber products ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08K5/5415C08J3/20
Inventor 王全苏俊柳李家忠何循派
Owner 东莞市贝特利新材料有限公司
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