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Flame retardant room temperature vulcanized silicone rubber formula and flame retardant room temperature vulcanized silicone rubber

A technology of room temperature vulcanization and silicone rubber, which is applied in the field of flame retardant room temperature vulcanization silicone rubber and flame retardant room temperature vulcanization silicone rubber to achieve good flame retardancy and mechanical properties

Active Publication Date: 2021-05-25
TANGSHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used flame retardant synergists are generally small molecules such as layered substances, boron-containing compounds, phosphorus-containing compounds, and rare earth oxides, which can reduce the amount of magnesium hydroxide added to a certain extent and achieve a certain flame-retardant effect, but Still can't effectively solve the problem that the amount of magnesium hydroxide added is too high

Method used

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  • Flame retardant room temperature vulcanized silicone rubber formula and flame retardant room temperature vulcanized silicone rubber
  • Flame retardant room temperature vulcanized silicone rubber formula and flame retardant room temperature vulcanized silicone rubber

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preparation example Construction

[0024] The preparation method of the flame-retardant RTV silicone rubber according to the third aspect of the present invention is described again, which is used to prepare the flame-retardant RTV silicone rubber described in the second aspect of the present invention, which includes the step: S1, the α, ω-dihydroxy The polydimethylsiloxane, reinforcing filler and simethicone oil are fully mixed and stirred evenly, then the flame retardant is added and the stirring is continued, then the crosslinking agent and the catalyst are added, and the mixed material is obtained after fully stirring and mixing; S2, the The above-mentioned mixed materials are poured into the mold, vacuumized to remove air bubbles, and then subjected to room temperature vulcanization reaction. After the reaction, a flame-retardant room temperature vulcanized silicone rubber is obtained.

[0025] In the preparation method of the flame-retardant room temperature vulcanized silicone rubber according to the thi...

Embodiment 1

[0030] 100 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 20000mPa·s, 5 parts with a specific surface area of ​​200m 2 / g of hydrophobic fumed silica and 5 parts of simethicone oil with a viscosity of 500mPa·s were fully stirred and mixed evenly, then 50 parts of magnesium hydroxide and 10 parts of chitosan were added in batches, fully stirred and mixed evenly, and then Add 2 parts of tetraethyl orthosilicate and 1.2 parts of dibutyltin dilaurate, stir and mix evenly, then pour it into a Teflon mold, vacuumize and remove air bubbles, pave it flat, and vulcanize at room temperature for 24 hours to obtain a flame-retardant room temperature Vulcanized silicone rubber.

Embodiment 2

[0032] The preparation method of flame-retardant room temperature vulcanized silicone rubber is the same as embodiment 1, the difference is that,

[0033] The number of additions of chitosan is 15 parts.

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Abstract

The invention provides a flame retardant room temperature vulcanized silicone rubber formula and a flame retardant room temperature vulcanized silicone rubber. The flame-retardant room temperature vulcanized silicone rubber formula is composed of: α,ω-dihydroxy polydimethylsiloxane, 100 parts; reinforcing filler, 3-10 parts; dimethyl silicone oil, 0-10 parts 15 parts; flame retardant, 60 to 80 parts; crosslinking agent, 1 to 3 parts; catalyst, 0.5 to 3 parts; the flame retardant is obtained by compounding magnesium hydroxide and chitosan. The flame-retardant room-temperature-vulcanized silicone rubber formed by vulcanizing the flame-retardant room-temperature-vulcanized silicone rubber formula can simultaneously take into account good flame-retardant properties and mechanical properties.

Description

technical field [0001] The application relates to the field of rubber, in particular to a flame-retardant RTV silicone rubber formulation and a flame-retardant RTV silicone rubber. Background technique [0002] Room temperature vulcanized silicone rubber has excellent electrical insulation, weather resistance, moisture resistance, shock resistance, compression resistance and physiological inertia, and can be widely used in various industries. Room temperature vulcanized silicone rubber can be vulcanized and molded in situ without heating or pressure at room temperature, which is extremely convenient to use, but room temperature vulcanized silicone rubber itself is flammable, which greatly limits its application field, so the development of room temperature vulcanized rubber with good flame retardant properties Vulcanized silicone rubber is of great significance. [0003] Although halogen-based flame retardants have good flame retardant effects, due to the release of toxic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L5/08C08K3/22
CPCC08K2003/2224C08L83/04C08L2201/02C08L2205/03C08L5/08C08K3/22
Inventor 刘昌伟张红霞李德玲
Owner TANGSHAN NORMAL UNIV