Flam resistant silicone rubber beneficial to demolding and preparation method thereof

A technology of silicone rubber and mixing silicone rubber, applied in the field of silicone rubber, can solve the problems of long vulcanization time, slow vulcanization speed, long molding process, etc., achieve obvious synergistic effect of flame retardant, reduce linear shrinkage rate, and improve elongation efficiency Effect

Inactive Publication Date: 2019-03-15
广州科系维新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. With strong alkalinity, it is easy to stick to the roller during processing, resulting in low processing efficiency in subsequent processes;
[0005] 2. The filling volume is too large, its own specific gravity is large, and the line shrinkage is high, and the feeding volume of the formed product is large;
[0006] 3. If the filling amount is too large, the vulcanization speed is too slow, the vulcanization time is too long, the product is prone to burnt edges, sticking to the mold, the molding process takes too long, the efficiency is low, and the defective rate is high

Method used

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  • Flam resistant silicone rubber beneficial to demolding and preparation method thereof
  • Flam resistant silicone rubber beneficial to demolding and preparation method thereof
  • Flam resistant silicone rubber beneficial to demolding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of flame-retardant silicone rubber that is beneficial to demoulding. The raw materials are calculated in parts by mass: 100 parts of kneaded silicone rubber, 98 parts of aluminum hydroxide, 0 parts of silicon dioxide, 2 parts of iron oxide, and 3 parts of plasticizer , 0.3 parts of vulcanization accelerator, 0.3 parts of release agent.

[0036] Iron oxide is Fe 2 o 3 .

[0037] The vulcanization accelerator is a hydrosilyl functional vulcanization accelerator.

[0038] The plasticizer is hydroxy silicone oil.

[0039] The release agent is zinc stearate.

[0040] A kind of preparation method of the flame-retardant silicone rubber that is beneficial to demoulding, comprises the steps:

[0041] S1 taking materials, weighing and mixing raw materials such as silicone rubber, aluminum hydroxide, silicon dioxide, ferric oxide, mold release agent and vulcanization accelerator in proportion;

[0042] S2 kneading, which is divided into 5 times and put into the kneade...

Embodiment 2

[0053] A kind of flame-retardant silicone rubber that is beneficial to demoulding. The raw materials are calculated in parts by mass: 100 parts of kneaded silicone rubber, 95 parts of aluminum hydroxide, 0 parts of silicon dioxide, 5 parts of iron oxide, and 3 parts of plasticizer , 0.3 parts of vulcanization accelerator, 0.3 parts of release agent. Other specific implementations are all the same as in Example 1.

Embodiment 3

[0055] A kind of flame-retardant silicone rubber that is beneficial to demoulding. The raw materials are calculated in parts by mass: 100 parts of kneaded silicone rubber, 75 parts of aluminum hydroxide, 20 parts of silicon dioxide, 5 parts of iron oxide, and 3 parts of plasticizer , 0.3 parts of vulcanization accelerator, 0.3 parts of release agent. Other specific implementations are all the same as in Example 1.

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Abstract

The invention discloses a flam resistant silicone rubber beneficial to demolding and a preparation method thereof. The flam resistant silicone rubber comprises the following formula materials in partsby mass: 100 parts of mixed silicone rubber, 0 to 100 parts of aluminum hydroxide, 0 to 100 parts of silicon dioxide, 1 to 50 parts of iron oxide, 0 to 5 parts of a plasticizer, 0 to 5 parts of a vulcanization accelerator, and 0 to 1 part of a release agent. The flam resistant silicone rubber can ensure that the problems of roll sticking and mold sticking cannot occur on the basis that the flameresistance reaches UL94V-0, and further has the advantages that the preparation technology is simple, the cost is low, the molding efficiency is high, the defective percentage is low, and the flam resistant silicone rubber halogen-free and environmentally friendly.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a flame-retardant silicone rubber which is good for mold release and a preparation method thereof. Background technique [0002] Magnesium hydroxide, aluminum hydroxide, etc. do not release harmful gases during combustion, and the residue after combustion is also non-polluting, and has the advantages of cheap, easy to obtain, good insulation and high cost performance, so they are used as environmentally friendly flame retardants for silicone rubber. widely used. However, magnesium hydroxide and aluminum hydroxide have obvious flame-retardant effects only when the amount of addition is large. High-filling flame-retardant materials will destroy the physical properties of silicone rubber, making the application of high-performance products greatly restricted. limit. [0003] Aluminum hydroxide and magnesium hydroxide are added to the silicone rubber formula, and there are several pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K13/06C08K3/22C08K3/36
CPCC08K2003/2227C08K2003/2272C08K2003/2275C08L83/04C08L2201/02C08L2205/025C08K13/06C08K3/22C08K3/36
Inventor 王建民
Owner 广州科系维新材料有限公司
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