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Preparation method of antistatic and flame-retardant silicon rubber foam material

A technology of foam material and silicone rubber, which is applied in the field of preparation of silicone rubber foam material, can solve the problems of high cost and high density, and achieve the effect of improving mechanical properties, improving electrical conductivity and flame retardancy

Inactive Publication Date: 2015-03-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the density is higher and the cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Prepare the raw materials, the components and parts by weight of the raw materials are as follows:

[0027] 107 silicone rubber (α,ω-dihydroxy polydimethylsiloxane): 100 parts

[0028] Graphene: 3 parts

[0029] Solvent petroleum ether: 77 parts

[0030] Hydrogen silicone oil: 3 parts

[0031] Platinum catalyst: 5 parts

[0032] Vinyl-terminated silicone oil: 2 parts

[0033] Coupling agent KH550: 2 parts

[0034] (2) First, stir and dissolve 107 silicone rubber in petroleum ether to obtain a silica gel dispersion. Then, graphene was ultrasonically dispersed in petroleum ether for 10 min and stirred with γ-aminopropyltriethoxysilane (KH-550) at 90 °C for 24 hours, then condensed and refluxed. Then it was added to the silica gel dispersion and stirred for 10 h, and the solvent was removed in vacuo. Then add hydrogen-containing silicone oil, vinyl-terminated silicone oil, and platinum catalyst in sequence, and stir evenly. Finally, it was placed in a mold and ...

Embodiment 2

[0037] (1) Prepare the raw materials, the components and parts by weight of the raw materials are as follows:

[0038] 107 silicone rubber: 100 parts

[0039] Graphene: 3 parts

[0040] Solvent petroleum ether: 77 parts

[0041] Foaming agent H (N,N'-dinitrosopentamethylenetetramine): 3 parts

[0042] Catalyst dibutyltin silicate: 5 parts

[0043] Cross-linking agent BPO: 2 parts

[0044] Coupling agent KH550: 2 parts

[0045] (2) First, stir and dissolve the silicone rubber in petroleum ether to obtain a silica gel dispersion. Then, graphene was ultrasonically dispersed in petroleum ether for 10 min and stirred with γ-aminopropyltriethoxysilane (KH-550) at 90 °C for 24 hours, and then condensed and refluxed. Then it was added to the silica gel dispersion and stirred for 10 h, and the solvent was removed in vacuo. Then add foaming agent H, BPO, dibutyltin dilaurate in turn, and stir evenly. Finally, place the mold on a flat vulcanizer for foam vulcanization to obtain a 3...

Embodiment 3

[0048] In this embodiment, the raw materials and preparation method are basically the same as in Embodiment 1, except that the amount of graphene used is 0 parts.

[0049] The obtained silicone rubber foam plate is tested by a high resistance meter, and its surface resistivity is 10 -15 Ω; the limiting oxygen index test is 22.3%; the universal tensile testing machine test, its tensile strength is 0.65 MPa.

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PUM

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Abstract

The invention discloses a preparation method of an antistatic and flame-retardant silicon rubber foam material. The antistatic and flame-retardant silicon rubber foam material is prepared from raw materials including silicon rubber, a foaming agent, a crosslinking agent, a catalyst and thermal reduced graphene oxide. The preparation method comprises the following steps of (1) stirring and dispersing the silicon rubber into a solvent to obtain a silicon rubber dispersing solution; (2) placing the thermal reduced graphene oxide into the same solvent to carry out ultrasonic dispersion, stirring the thermal reduced graphene oxide and a coupling agent under heating, then, adding the liquid obtained through stirring under heating into the silicon rubber dispersing solution to secondarily stir, and removing the solvent in vacuum; and (3) sequentially adding the crosslinking agent, the catalyst and the foaming agent, uniformly stirring the crosslinking agent, the catalyst and the foaming agent to obtain a mixture, then, placing the mixture into a mould to foam and cure to prepare a silicon rubber / graphene composite silicon rubber foam sheet with the thickness of 3mm. According to the preparation method, graphene is simultaneously used as an antistatic agent, a flame retardant and a reinforcing agent, so that the antistatic and flame-retardant silicon rubber foam material has favorable antistatic performance, flame retardance and mechanical property.

Description

technical field [0001] The invention relates to the technical field of a preparation method of a silicone rubber foam material, in particular to a preparation method of a silicone rubber foam material with antistatic and flame retardancy. Background technique [0002] Before vulcanization, silicone rubber is a kind of polysiloxane compound with a network structure, which has a silicon-oxygen bond as the main chain, and silicon atom side groups are connected to organic groups such as methyl, phenyl, and vinyl groups. Silicone rubber foam, also known as sponge silicone rubber, is a porous elastic material obtained by foaming silicone rubber. Silicone rubber foam combines the characteristics of silicone rubber and foam materials. It not only has the excellent high and low temperature resistance, radiation resistance and chemical stability of silicone rubber, but also has the low density, high elasticity, sound insulation, heat insulation, damping and It has functions such as s...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/07C08K9/06C08K3/04C08K5/14C08J9/10
Inventor 翟文涛郑文革李洋
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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