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Bicomponent addition high-flame-retardant silicone rubber and preparation method thereof

An addition-type, high-flame-retardant technology, applied in the field of two-component addition-type high-flame-retardant silicone rubber and its preparation, can solve the problems of large flame retardants and affecting material processing performance, so as to improve flame-retardant performance and good mechanical properties. Performance and processing performance, low cost effect

Active Publication Date: 2013-10-02
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of such flame retardants required to reach a certain level of flame retardancy is too large, which seriously affects the processing properties of materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] The preparation method of the above-mentioned two-component addition type high flame-retardant silicone rubber comprises the following steps:

[0057] a. Preparation of base glue

[0058] Add 75%-90% vinyl silicone oil and 25%-50% reinforcing filler to the stirring tank, stir at room temperature for 1-2 hours, add the remaining reinforcing fillers, and continue stirring for 3-5 hours , heat up to 150-180 ℃, stir for 4-8 hours, add the remaining vinyl silicone oil, stir for 2-4 hours, and get the base glue after cooling;

[0059] b. Preparation of component A

[0060] 100 parts of base glue, 0.1-0.8 parts of platinum catalyst and 20-60 parts of flame retardant are mixed evenly to obtain component A;

[0061] c. Preparation of component B

[0062] 100 parts of base rubber, 0.8-2.4 parts of hydrogen-containing cross-linking agent, 0.1-1 part of inhibitor and 20-60 parts of flame retardant, mixed evenly, that is, component B;

[0063] d. Mix the prepared component A and c...

Embodiment 1

[0065] a. Preparation of base glue

[0066] Add 200kg of vinyl silicone oil and 40kg of reinforcing fillers into the stirring tank, stir at room temperature for 1 hour, add the remaining 80kg of reinforcing fillers, continue to stir for 3 hours, heat up to 150 ° C, stir for 4 hours, add the remaining 50kg of vinyl silicone oil , stirred for another 2 hours, and cooled to obtain base gum;

[0067] b. Preparation of component A

[0068] Take 100kg of base rubber, then add 0.3kg of platinum catalyst, 20kg of aluminum hydroxide, and 10kg of ammonium polyphosphate, and mix evenly to obtain component A;

[0069] c. Preparation of component B

[0070] Take 100kg of base rubber, add 2kg of low-hydrogen silicone oil, 0.5kg of acetylene alcohol, 20kg of aluminum hydroxide, and 10kg of ammonium polyphosphate, and mix well to obtain component B;

[0071] d. Mix the prepared component A and component B uniformly in a mass ratio of 1:1 to obtain a high flame retardant silicone rubber.

...

Embodiment 2

[0076] a. Preparation of base glue

[0077] Add 200kg of vinyl silicone oil and 20kg of reinforcing filler into the stirring tank, stir at room temperature for 1 hour, add the remaining 40kg of reinforcing filler, continue to stir for 3 hours, heat up to 150 ° C, stir for 4 hours, add the remaining 26.7kg of vinyl Silicone oil, stirred for another 2 hours, and cooled to obtain base gum;

[0078] b. Preparation of component A

[0079] Take 100kg of base rubber, add 0.8kg platinum catalyst, 20kg magnesium hydroxide, 20kg antimony trioxide, 20kg octabromo ether, mix well, and obtain component A;

[0080] c. Preparation of component B

[0081] Take 100kg of base rubber, then add 1.8kg of low-hydrogen silicone oil, 1kg of acetylene alcohol, 20kg of magnesium hydroxide, 20kg of antimony trioxide, and 20kg of octabromoether, and mix well to obtain component B;

[0082] d. Mix the prepared component A and component B uniformly in a mass ratio of 1:1 to obtain a high flame retardant...

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Abstract

The invention relates to a bicomponent addition high-flame-retardant silicone rubber and a preparation method thereof. The bicomponent addition high-flame-retardant silicone rubber consists of a component A and a component B at a mass ratio of 1:10-10:1, wherein the component A consists of 100 parts of base, 0.1-0.8 parts of platinum catalyst and 20-60 parts of fire retardant; and the component B consists of 100 parts of base, 0.8-2.4 parts of hydrogenous crosslinking agent, 0.1-1 part of inhibitor and 20-60 parts of fire retardant. The base consists of 100 parts of vinyl silicone oil and 25-50 parts of reinforcement filling, and the fire retardant consists of an inorganic flame retardant and an organic fire retardant at a mass ratio of 1:(0.3-0.5). According to the rubber and the method, the inorganic flame retardant and the organic fire retardant are mixed and cooperate with the platinum catalyst for flame retardance, and the flame-retardant silicone rubber with good flame retardance, mechanical properties and processability and low raw material cost is prepared.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a two-component addition type high flame-retardant silicone rubber and a preparation method thereof. Background technique [0002] Because of its excellent heat resistance, cold resistance, environmental resistance, electrical insulation, low compression set and fatigue resistance, silicone rubber has been widely used in electronics, electrical, machinery manufacturing, chemical industry, Food, daily necessities, medical and health and other fields. However, once the silicone rubber catches fire, it will continue to burn, which limits its application in fields such as aerospace, automobiles, and power transmission lines that require good flame retardancy. [0003] The flame retardant effect of platinum compounds on silicone rubber is unique. There are two main flame retardant effects of platinum compounds in silicone rubber: one is to prevent the formation of transition complexes...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/06C08K3/22C08K3/38C08K3/32C08K5/06C08K5/523C08K5/02C08K3/36C08G77/20C08G77/12
Inventor 王超陆磊王芳
Owner JIANGSU TIANCHEN NEW MATERIALS
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