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Expandable silicone rubber sheet and preparation method thereof

A silicone rubber sheet, expandable technology, applied in the field of rubber, to achieve the effect of adjustable foaming ratio, simple foaming process, and improved mechanical strength

Inactive Publication Date: 2018-08-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no report on the research of this kind of expandable silicone rubber sheet that can spontaneously foam and form gaps in structural parts in China, and then realize gap filling.

Method used

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  • Expandable silicone rubber sheet and preparation method thereof
  • Expandable silicone rubber sheet and preparation method thereof
  • Expandable silicone rubber sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The expandable silicone rubber sheet disclosed in Example 1 comprises the following raw materials:

[0027] In parts by mass, 100 parts of silicone rubber, 15 parts of white carbon black, 40 parts of talcum powder, 100 parts of aluminum hydroxide, 3 parts of vulcanizing agent (DCP), 8 parts of foaming agent, and 4 parts of hydrogenated silicone oil.

[0028] Above-mentioned expandable silicone rubber sheet is made by following method steps:

[0029] Step 1, put the weighed silicone rubber and white carbon black into the open mixer for mastication, then add talcum powder, aluminum hydroxide, vulcanizing agent, and foaming agent in sequence, and finally add 4 parts of hydrogenated silicone oil to increase the hardness of the silicone rubber. Fluidity, the prepared rubber compound.

[0030] Step 2, put the compounded rubber obtained in step 1 into a calender to produce a sheet, adjust the roller distance according to the size of the mold cavity and the required foaming ra...

Embodiment 2

[0035] Compared with Example 1, the change of Example 2 lies in the change of the type of vulcanizing agent.

[0036] The expandable silicone rubber sheet disclosed in Example 2 includes the following raw materials measured in parts by mass:

[0037] In parts by mass, 100 parts of silicone rubber, 15 parts of white carbon black, 40 parts of talcum powder, 100 parts of aluminum hydroxide, 3 parts of vulcanizing agent (BPO), 8 parts of foaming agent, and 4 parts of hydrogenated silicone oil.

[0038] Above-mentioned expandable silicone rubber sheet is made by following method steps:

[0039] Step 1: Put the weighed silicone rubber and white carbon black into an open mill for mastication, then add aluminum hydroxide, vulcanizing agent, foaming agent in sequence, and finally add hydrogenated silicone oil to prepare a rubber compound.

[0040] Step 2, put the compounded rubber obtained in step 1 into a calender to produce a sheet, adjust the roller distance according to the size o...

Embodiment 3

[0045] Compared with Embodiment 1, Embodiment 3 is changed in that the type of vulcanizing agent is changed.

[0046]The expandable silicone rubber sheet disclosed in Example 3 includes the following raw materials measured in parts by mass:

[0047] In parts by mass, 100 parts of silicone rubber, 15 parts of white carbon black, 40 parts of talcum powder, 100 parts of aluminum hydroxide, 3 parts of vulcanizing agent (double two five), 8 parts of foaming agent, and 4 parts of hydrogenated silicone oil.

[0048] Above-mentioned expandable silicone rubber sheet is made by following method steps:

[0049] Step 1: Put the weighed silicone rubber and white carbon black into an open mill for mastication, then add aluminum hydroxide, vulcanizing agent, foaming agent in sequence, and finally add hydrogenated silicone oil to prepare a rubber compound.

[0050] Step 2, put the compounded rubber obtained in step 1 into a calender to produce a sheet, adjust the roller distance according to...

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Abstract

The invention discloses an expandable silicone rubber sheet and a preparation method thereof. The expandable silicone rubber sheet is prepared from the following components in parts by weight: 100 parts of silicone rubber, 10 to 30 parts of white carbon black, 100 to 150 parts of filler, 3 to 5 parts of vulcanizing agent, 6 to 10 parts of foaming agent and 3 to 8 parts of hydrogenated silicone oil. The preparation method of the expandable silicone rubber sheet comprises the following steps: putting and mixing the silicone rubber and the white carbon black in proportion in an open mill, then sequentially adding the filler, the vulcanizing agent, the foaming agent and the hydrogenated silicone oil, and mixing, thus preparing the expandable silicone rubber sheet. The expandable silicone rubber sheet disclosed by the invention can be used as a filling material for filling a gap of a structural member, and the gap of the structural member can be spontaneously filled during a temperature rising process through foaming; compared with a foamed silicone rubber filling material prepared by a traditional method, the preparation method has the advantages that advanced foaming is not required,the expandable silicone rubber sheet and the structural member are integrally formed, filling is compact, the foaming is uniform, and the like.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to an expandable silicone rubber sheet and a preparation method thereof. Background technique [0002] Silicone rubber is a new type of rubber with Si-O-Si bond as the main chain and organic groups as side chains. It has excellent weather resistance. Expandable silicone rubber combines the excellent high and low temperature resistance, electrical insulation, and ozone aging resistance of silicone rubber with the light weight, shock absorption, heat insulation, and sealing properties of foam materials. It is an important material in the aerospace field. It is widely used as filling material between structural parts. [0003] The foaming methods of silicone rubber are divided into chemical foaming and physical foaming. At present, the foaming methods of silicone rubber are mostly concentrated on chemical foaming, using organic azo compounds as foaming agents, catalyzed by platinum gro...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08K13/02C08K3/36C08K3/34C08K3/22C08J9/32
CPCC08J9/32C08J2383/07C08J2483/05C08K3/34C08K3/36C08K13/02C08K2003/2227
Inventor 秦岩赵子晗陈浩昌宋九强付忠奎黄志雄
Owner WUHAN UNIV OF TECH
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