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Flame-retardant and tear-resistant silicon rubber and preparation method thereof

A technology for tear-resistant silicone rubber and silicone rubber, applied in the field of silicone rubber, can solve the problems of restricting the application of silicone rubber products, reducing the mechanical properties of silicone rubber, and general compatibility of silicone rubber, achieving excellent electrical insulation performance, increasing phase Capacitive, high mechanical strength effect

Inactive Publication Date: 2017-12-01
CHANGSHA KENREACH POLYMER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tear strength of silicone rubber is much lower than that of other rubbers, and it is not flame retardant. These shortcomings greatly limit the application of silicone rubber products.
[0003] However, the existing flame-retardant silicone rubber either needs to add a large amount of inorganic flame retardants such as aluminum hydroxide, magnesium hydroxide, etc., which itself is generally compatible with silicone rubber, which reduces the mechanical properties of silicone rubber.
Or you need to add brominated flame retardants, which will release harmful gases containing halogens when burned, and will also cause a certain loss of mechanical strength

Method used

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  • Flame-retardant and tear-resistant silicon rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A flame-retardant and tear-resistant silicone rubber, comprising the following components in parts by weight: 100 parts of silicone rubber; 2 parts of hydroxy silicone oil; 2 parts of siloxane; 20 parts of wollastonite whiskers; 20 parts of mica powder; 0.5 parts; 0.5 parts of vulcanizing agent; 0.1 parts of coupling agent.

[0026] A preparation method of flame-retardant and tear-resistant silicone rubber, comprising the following steps:

[0027] (1) blending the wollastonite whiskers, mica powder and coupling agent in the above parts by weight, and performing surface active treatment;

[0028] (2) Then the above weight parts of silicone rubber, hydroxy silicone oil, siloxane, and the above-mentioned treated powder fillers are mixed together, the mixing temperature is 140-150°C, the mixing time is 120-150 minutes, and the mixing and kneading is completed Afterwards, carry out vacuum treatment;

[0029] (3) Cool down to 90-110°C through cooling water in the jacket of ...

Embodiment 2

[0033] A flame-retardant and tear-resistant silicone rubber, comprising the following components in parts by weight: 110 parts of silicone rubber; 4 parts of hydroxy silicone oil; 3 parts of siloxane; 30 parts of wollastonite whiskers; 40 parts of mica powder; 1.5 parts; vulcanizing agent 1.5 parts; coupling agent 0.4 parts;

[0034] A preparation method of flame-retardant and tear-resistant silicone rubber, comprising the following steps:

[0035] (1) blending the wollastonite whiskers, mica powder and coupling agent in the above parts by weight, and performing surface active treatment;

[0036] (2) Then the above weight parts of silicone rubber, hydroxy silicone oil, siloxane, and the above-mentioned treated powder fillers are mixed together, the mixing temperature is 150-160°C, the mixing time is 90-120 minutes, and the mixing and kneading is completed Afterwards, carry out vacuum treatment;

[0037] (3) Cool down to 90-110°C through cooling water in the jacket of the int...

Embodiment 3

[0041] A flame-retardant and tear-resistant silicone rubber, comprising the following components in parts by weight: 120 parts of silicone rubber; 5 parts of hydroxy silicone oil; 5 parts of siloxane; 50 parts of wollastonite whiskers; 50 parts of mica powder; 2 parts; 2 parts of vulcanizing agent; 0.5 parts of coupling agent;

[0042] A preparation method of flame-retardant and tear-resistant silicone rubber, comprising the following steps:

[0043] (1) blending the wollastonite whiskers, mica powder and coupling agent in the above parts by weight, and performing surface active treatment;

[0044] (2) Then the above weight parts of silicone rubber, hydroxy silicone oil, siloxane, and the above-mentioned processed powder fillers are mixed together, the mixing temperature is 160-170°C, the mixing time is 60-90 minutes, and the mixing and kneading is over Afterwards, carry out vacuum treatment;

[0045] (3) Cool down to 90-110°C through cooling water in the jacket of the inter...

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Abstract

The invention discloses flame-retardant and tear-resistant silicon rubber. The flame-retardant and tear-resistant silicon rubber comprises the following components: silicon rubber, an inner lubricating agent, a structure control agent, reinforcing filler, a flame retardant, a heat-resistant active agent, a vulcanizing agent and a coupling agent. Simultaneously, the invention also discloses a preparation method of the flame-retardant and tear-resistant silicon rubber. The preparation comprises the following steps: blending, mixing, cooling, remixing for discharging pieces, and vulcanizing and the like. The flame-retardant and tear-resistant silicon rubber disclosed by the invention has the advantages that wollastonite whiskers are fibrous crystal, mica powder is superfine powder with a layered structure, and 'filler-filler' structures are not easily generated by different powder structures under the action of the coupling agent; different powder structures can cause different stress deflections, so that the reinforcing effect is achieved; and the flame-retardant and tear-resistant silicon rubber is good in tear strength and mechanical strength as well as flame-retardant and heat-insulating properties, does not contain any halogen, and has the characteristics of less smoke generation amount and low smoke toxicity.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber, and in particular relates to a flame-retardant and tear-resistant silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber products have good heat resistance, aging performance and physiological inertia. It is widely used in the field of shock absorption and sealing with heat resistance requirements. However, the tear strength of silicone rubber is much lower than that of other rubbers, and it is not flame retardant. These shortcomings greatly limit the application of silicone rubber products. [0003] However, the existing flame-retardant silicone rubber either needs to add a large amount of inorganic flame retardants such as aluminum hydroxide, magnesium hydroxide, etc., and its compatibility with silicone rubber is average, which reduces the mechanical properties of silicone rubber. Or you need to add brominated flame retardants, which will rele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/06C08K13/06C08K9/06C08K7/10C08K3/34C08K3/22C08K7/00
CPCC08K2003/2272C08K2201/003C08K2201/016C08L83/04C08L2201/02C08L2201/22C08L2205/02C08L83/06C08K13/06C08K9/06C08K7/10C08K3/34C08K3/22C08K7/00
Inventor 成鹰汤丽春何斌
Owner CHANGSHA KENREACH POLYMER MATERIALS
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