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Indoor-temperature foaming flame-retarding liquid silicone rubber with controllable specific gravity and preparing method and application thereof

A liquid silicone rubber, room temperature foaming technology, applied in the field of foamed silicone rubber, can solve the problems of difficult dispersion, the effect of raw material dispersion effect on the specific gravity of the silicone rubber sponge, etc., and achieve the effects of controllable specific gravity, dry hand feel, and good mechanical properties.

Inactive Publication Date: 2019-08-09
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solid non-ionic surfactants are not easy to disperse in the foaming system, and the addition of water-containing powder is also likely to affect the dispersion effect of raw materials and the specific gravity of silicone rubber sponge.

Method used

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  • Indoor-temperature foaming flame-retarding liquid silicone rubber with controllable specific gravity and preparing method and application thereof
  • Indoor-temperature foaming flame-retarding liquid silicone rubber with controllable specific gravity and preparing method and application thereof

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preparation example Construction

[0080] Further, the present invention also provides the preparation method of the room temperature foamable flame retardant liquid silicone rubber with controllable specific gravity, comprising: including 107 room temperature vulcanized methyl silicone rubber, hydrogen-containing polysiloxane, and foaming aid The raw materials of the agent are mixed to obtain room temperature foaming flame retardant liquid silicone rubber with controllable specific gravity.

[0081] In some embodiments of the present invention, the preparation method of the room temperature foaming flame retardant liquid silicone rubber with controllable specific gravity comprises:

[0082] Mix the raw materials in component A to get component A; mix the raw materials in component B to get component B;

[0083] Then, the obtained components A and B are mixed and then foamed to obtain room temperature foaming flame-retardant liquid silicone rubber with controllable specific gravity;

[0084] As a preference, t...

Embodiment 1

[0098] Preparation of component A: Weigh 100g of 107 room temperature vulcanized methyl silicone rubber with a viscosity of 5000cp, 82g of vinyl-terminated polydimethylsiloxane of 5000cp, and polyvinyl polydimethylsiloxane of 20000cp with a vinyl content of 2%. Alkane 9g, using a high-speed disperser, after stirring evenly under the condition of 1500RPM, continue to add Al(OH) while stirring 3 Add 97g of filler within 10min, continue stirring for 10min, then add 4.11g of platinum(0)1,3-divinyltetramethyldisiloxane, stir at 1500RPM for 10min, mix well and then vacuumize for 10min to obtain A Component.

[0099] Preparation of component B: Weigh 157g of 107 room temperature vulcanized methyl silicone rubber with a viscosity of 5000cp, 27g of hydrogen-containing polysiloxane with a hydrogen content of 1.6%, use a high-speed disperser, stir at 1000RPM for 5min, and mix well while stirring While adding Al(OH) 3 Add 95g of filler within 10min, then continue stirring at 1500RPM for...

Embodiment 2

[0103] Preparation of reinforcing base glue: Add 100 parts by mass of 10000 cp vinyl polydimethylsiloxane, 2.5 parts by mass of distilled water, 12.5 parts by mass of hexamethyldisilazane into a kneader, stir at room temperature for 5 minutes, add white The total amount of carbon black added is 50 parts by mass. After adding all the carbon black, treat it at room temperature for 2 hours, then raise the temperature to 150°C, and treat it under vacuum -0.1MPa for 3 hours. After cooling, the reinforcing base rubber is obtained.

[0104] Preparation of component A: Weigh 100g of 107 room temperature vulcanized methyl silicone rubber with a viscosity of 5000cp, 78g of vinyl-terminated polydimethylsiloxane of 5000cp, and polyvinyl polydimethylsiloxane of 20000cp with a vinyl content of 2%. 8.5g of alkane, 24g of reinforcing base glue, using a high-speed disperser, stirring evenly under the condition of 1500RPM, continue to add Al(OH) while stirring 3 Filler 61g, add within 10min, co...

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Abstract

The invention provides an indoor-temperature foaming flame-retarding liquid silicone rubber with controllable specific gravity and a preparing method and application thereof. The indoor-temperature foaming flame-retarding liquid silicone rubber with controllable specific gravity is prepared from 107 indoor-temperature vulcanization methyl silicone rubber, hydrogen-containing polysiloxane and a foaming-promoting agent; the foaming-promoting agent comprises a non-ionic surfactant. According to the indoor-temperature foaming flame-retarding liquid silicone rubber and the preparing method and application thereof, foaming silicone rubber is prepared through hydrosilylation between hydroxyl in the 107 indoor-temperature vulcanization methyl silicone rubber and the hydrogen-containing polysiloxane, the liquid non-ionic surfactant is adopted as the foaming-promoting agent, and by adjusting the use amount of a filler, the hydrogen-containing polysiloxane and the like and the proportion of a catalyst and an inhibitor, the specific gravity control over the foaming silicone rubber is achieved; the prepared foaming silicone rubber has a smooth and integral surface, and is dry and comfortable inhandfeel, the specific gravity is within the range of 0.2-0.6 g / cm<3>, the mechanical property is good, and the flame-retarding level reaches the UL94 V-0 level.

Description

technical field [0001] The invention relates to the field of foamed silicone rubber, in particular to a room-temperature foamed flame-retardant liquid silicone rubber with controllable specific gravity, a preparation method and application thereof. Background technique [0002] As a new type of material, foamed silicone rubber has the characteristics of high and low temperature resistance, weather resistance, and insulation of silicone rubber and the characteristics of soft, high elasticity, and compressibility of foam materials. It can be used in potting, packaging, and other fields. It has moisture-proof, Vibration reduction, sound insulation, heat insulation and other effects are widely used in various fields such as civil, aerospace, and national defense construction. [0003] The preparation methods of foamed silicone rubber mainly include physical foaming method and chemical foaming method. The physical foaming method is mainly to add hollow particle powder to the sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/05C08J9/30
CPCC08J9/0023C08J9/0042C08J9/30C08J2383/04C08J2483/05C08J2483/07
Inventor 李露陈丽云郭昱见胡盛卢杭徐旋
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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