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Two-component addition type high-fire-retardant silica gel with low compression deformation and preparation method thereof

A low-compression-set, two-component technology, applied in the field of silicone gel, can solve the problems such as the decrease of flame retardant performance of addition-type liquid silicone gel, and achieves simple and easy preparation method, good storage performance and good adhesion. Effect

Active Publication Date: 2015-04-08
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a two-component addition-type high flame-retardant silicone gel with low compression set and its preparation method, so as to solve the problems of the existing addition-type liquid silicone gel that the flame-retardant performance decreases under long-term heating.

Method used

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  • Two-component addition type high-fire-retardant silica gel with low compression deformation and preparation method thereof
  • Two-component addition type high-fire-retardant silica gel with low compression deformation and preparation method thereof
  • Two-component addition type high-fire-retardant silica gel with low compression deformation and preparation method thereof

Examples

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Effect test

preparation example Construction

[0042]The preparation method of the above-mentioned two-component addition type high flame-retardant silicone gel with low compression set comprises the following steps:

[0043] (1) Preparation of base rubber: Add 100 parts by mass of vinyl silicone oil into the kneader and stir at room temperature for 0.5-1h, add MQ silicone resin with a formula amount of 25%-50% and stir for 0.5-1h, then add the remaining MQ silicone resin, and continue stirring 3 to 5 hours to obtain base rubber;

[0044] (2) Preparation of component A: add 100 parts by mass of rubber base, 0.01 to 0.05 parts by mass of platinum catalyst and 30 to 70 parts by mass of flame retardant into the stirring tank, and mix evenly to obtain component A;

[0045] (3) Preparation of component B: add 100 parts by mass of rubber base, 1 to 5 parts by mass of hydrogen-containing silicone oil, 0.01 to 0.05 parts by mass of inhibitor and 30 to 70 parts by mass of flame retardant into the stirring tank, and mix well to obta...

Embodiment 1

[0048] The vinyl silicone oil involved in this example has a viscosity of 500 mPa.s at 25° C. and a vinyl mass content of 0.8%. MQ silicone resin has a viscosity of 200mPa.s at 25°C and a vinyl mass content of 2%. The mass content of platinum in the platinum catalyst is 500ppm. The hydrogen-containing silicone oil has a viscosity of 60 mPa.s at 25°C and a hydrogen mass content of 0.1%. The inhibitor is compounded and modified by heptamethylcyclotetrasiloxane and ethynyl-1-cyclohexanol in a molar ratio of 1:1 under the action of chloroplatinic acid.

[0049] (1) Prepare the base rubber: add 400Kg vinyl silicone oil into the kneader and stir at room temperature for 1 hour, add 60Kg of MQ silicone resin and stir for 1 hour, then add 60Kg of MQ silicone resin, and continue stirring for 3 hours to obtain the base glue;

[0050] (2) Preparation of component A: Take 200Kg of rubber base, 0.1Kg of platinum catalyst, 40Kg of quartz powder and 20Kg of soft carbon black and add them to...

Embodiment 2

[0056] The vinyl silicone oil involved in this example has a viscosity of 750 mPa.s at 25° C. and a vinyl mass content of 1%. The MQ silicone resin has a viscosity of 300mPa.s at 25°C and a vinyl mass content of 2.6%. The mass content of platinum in the platinum catalyst is 2000ppm. The hydrogen-containing silicone oil has a viscosity of 250 mPa.s at 25°C and a hydrogen mass content of 1.2%. The inhibitor is compounded and modified by heptamethylcyclotetrasiloxane and ethynyl-1-cyclohexanol at a molar ratio of 1.2:1 under the action of chloroplatinic acid.

[0057] (1) Prepare the base rubber: add 400Kg vinyl silicone oil into the kneader and stir at room temperature for 1 hour, add 40Kg of MQ silicone resin and stir for 1 hour, then add 50Kg of MQ silicone resin, and continue stirring for 3 hours to obtain the base glue;

[0058] (2) Preparation of component A: Take 200Kg of rubber base, 0.1Kg of platinum catalyst, and 80Kg of zinc carbonate into the stirring tank, and mix ...

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Abstract

The invention discloses two-component addition type high-fire-retardant silica gel with low compression deformation. The two-component addition type high-fire-retardant silica gel with low compression deformation is formed by mixing a component A with a component B in a mass ratio of 1:1, wherein the component A is composed of the following components in parts by mass: 100 parts of base gum, 0.01-0.05 part of a platinum catalyst and 30-70 parts of a fire retardant; and the component B is composed of the following components in parts by mass: 100 parts of base gum, 1-5 parts of hydrogen-containing silicone oil, 0.01-0.05 part of an inhibiting agent and 30-70 parts of a fire retardant. The invention also discloses a preparation method of the two-component addition type high-fire-retardant silica gel with low compression deformation. The prepared two-component addition type high-fire-retardant silica gel with low compression deformation has the advantages that the fire-retardant grade of the silica gel reaches up to 94V-0 by adding the fire retardant, good physical properties are realized, a compression deformation value is less than 12%, the strength is high, the adhesive property is good, and the storage property is good, so that the two-component addition type high-fire-retardant silica gel with low compression deformation has an industrial value. The preparation method of the two-component addition type high-fire-retardant silica gel with low compression deformation is simple and practicable and is low in cost, thus being applicable to mass production.

Description

technical field [0001] The invention relates to the technical field of silicone gel, in particular to a two-component addition type high flame-retardant silicone gel with low compression deformation and a preparation method thereof. Background technique [0002] Compared with condensation-type liquid silicone rubber, addition-type liquid silicone rubber has the advantages of no by-products, no heat release, minimal shrinkage, no corrosion, and deep vulcanization during the vulcanization process. Good type. In addition, after the addition-type liquid silicone gel is vulcanized, the residual platinum or platinum compounds have a unique flame-retardant effect on silicone rubber. There are two main flame retardant effects of platinum compounds in silica gel: one is to prevent the formation of transition complexes that promote depolymerization; the other is to help fix a part of the condensed product through the intermediate of filler or oxide during cracking, forming Insulatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/02C08K3/04C08K3/26C08K3/36C08K3/22C08K5/17C08K5/3475C08K5/521C08G77/20C08G77/12B29C35/02
Inventor 陆磊王芳张旭
Owner JIANGSU TIANCHEN NEW MATERIALS
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