Room temperature vulcanized conductive silicon rubber and preparation method thereof

A room temperature vulcanization, conductive silicon technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of insignificant increase in strength, inability to obtain conductive properties and physical properties of conductive silicone rubber, and achieve mechanical and electrical conductivity. Excellent performance, excellent electrical conductivity and reinforcement, simple and easy preparation method

Inactive Publication Date: 2010-07-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in strength of the above methods is not outstanding, and it is impossible to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Silicone rubber raw rubber (α, ω-dihydroxypolydimethylsiloxane, viscosity=21000 mPa·s) 100 parts by weight (50 grams), BP2000 superconducting carbon black (carbon black particle diameter is 17.275nm, N 2 The adsorption specific surface area is 1403.091m 2 / g, DBP absorption value is 330ml / 100g) 20 parts by weight (10 grams) are sequentially added to the mixer and kneaded at room temperature for 10 minutes, and the mixed rubber is heat-treated in an oven at 120°C for 2 hours to make the rubber The material and the additive fully function, cool to room temperature, and then add 4 parts by weight (2 grams) of crosslinking agent (tetraethyl orthosilicate) and 1.5 parts by weight (0.75 grams) of catalyst (dibutyltin dilaurate) in parts by mass, Evenly kneaded, molded, and placed at room temperature for 5 days to obtain room temperature vulcanized conductive silicone rubber with low modulus and high strength.

[0027] The electrical and mechanical properties of the above si...

Embodiment 2

[0029] The specific operation method is the same as that of Example 1, except that the superconducting carbon black is added in an amount of 25 parts by weight (unit: gram).

[0030] The electrical and mechanical properties of the above silicone rubber are shown in Table 2.

Embodiment 3

[0032] The specific operation method is the same as that of Example 1, except that the viscosity of 107 glue is 2400 mPa·s, and the addition amount of superconducting carbon black is 25 parts.

[0033] The electrical and mechanical properties of the above silicone rubber are shown in Table 2.

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PUM

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Abstract

The invention discloses low-modulus high-intensity room temperature vulcanized conductive silicon rubber, which is prepared from the following ingredients by weight parts: 100 parts of silicon rubber crude rubber, 10 to 30 parts of conductive filling materials, 2 to 5 parts of cross linking agents and 0.2 to 2 parts of catalysts through mixing and molding pressing. The room temperature vulcanized conductive silicon rubber has excellent physical performance, the tearing intensity can reach 21.1 kN/m, the break extension percentage is 1500 percent, the 100 percent modulus is 0.79 MPa, and the 300 percent modulus is 1.30 MPa. The room temperature vulcanized conductive silicon rubber can be used for producing various high-stretching conductive rubber products such as electric plug connectors, electric sealing shock absorption elements, conductive connectors and the like, can be widely applied to various fields such as electronics and electrics, communication, traffic, chemical engineering, medical science, toys, machinery, boats and the like, and has good economic benefits and application value.

Description

technical field [0001] The invention relates to a room temperature vulcanized silicone rubber and a preparation method thereof, in particular to a low modulus, high strength room temperature vulcanized conductive silicone rubber and a preparation method thereof, belonging to the technical field of conductive polymer composite materials. Background technique [0002] Conductive silicone rubber is the most used conductive rubber. With the rapid development of electronic instruments with weak current characteristics represented by computers, its research and development are becoming more and more active. The current research papers or patents are mainly conductive silicone rubber composite materials, and their conductive properties are realized by adding conductive fillers, such as metal or metal oxide nanoparticles or carbon black, to the silicone rubber matrix, such as U.S. Pat.5082596, U.S. Pat.5217651, CN200510029718, etc. Because metals and their oxides are hard inorganic...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/07C08L83/05C08K3/04C08K5/5415H01B1/24
Inventor 张洁张园园冯圣玉
Owner SHANDONG UNIV
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