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Silicone get composition

A technology of siloxane gel and composition, which is applied in the direction of mechanical equipment, other chemical processes, low internal friction springs, etc., can solve the problems that it is impossible to obtain high vibration-absorbing performance gel, and achieve the effect of excellent vibration-absorbing performance

Inactive Publication Date: 2003-05-14
THREEBOND FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not possible to obtain gels with high vibration-absorbing properties

Method used

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Examples

Experimental program
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Embodiment

[0034] To 2000 g of silanol-terminated polydimethylsiloxane (molecular weight 10,000) was added 16.3 g of aminopropyldimethoxysilane. This mixture was stirred and reacted at 100° C. for 2 hours by nitrogen substitution. Thereafter, excess aminopropyltrimethoxysilane was removed by vacuum suction, thereby obtaining polydimethylsiloxane having a viscosity of 10000 cps and one end blocked by an amino group. To 100 g of the obtained resin was added 0.77 g of 2-isocyanatoethyl methacrylate. The mixture was stirred at 50° C. with nitrogen substitution and reacted for 1 hour, thereby obtaining (A) as component (a).

[0035] 50-cSt dimethylpolysiloxane (TMDMS) having a trimethylsilyl group at the end was added in the amount shown in Table 1 as component (b).

[0036] Fumed silica (Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.) was added in the amount shown in Table 1 as component (c).

[0037] Amorphous powder of a three-dimensionally crosslinked silicone resin (Trefil R-90...

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PUM

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Abstract

The invention provides a vibration-absorbing silicone gel composition mainly comprising: 100 parts by weight of (a) an organopolysiloxane having a (meth)acryloyl group in its molecule; from 5 to 100 parts by weight of (b) an organopolysiloxane unreactive with ingredient (a); from 1 to 50 parts by weight of (c) an amorphous pulverization product of a three-dimensionally crosslinked silicone resin; from 1 to 20 parts by weight of (d) a fumed silica; and an effective amount of (e) a polymerization initiator, as a gel composition which has high vibration-absorbing properties and high shape retention and which can be used as, e.g., a vibration-absorbing damper even when it is not sealed up in a container or bag.

Description

technical field [0001] The present invention relates to a silicone gel composition capable of damping vibrations. In particular, the present invention relates to a silicone gel having good vibration damping properties for electrical / electronic devices as dampers and insulators. Background of the invention [0002] Electronic appliances to be mounted on vehicles, such as audio equipment, measuring instruments, displays, and recorders, have heretofore used anti-vibration dampers in order to prevent vibration or shock from being transmitted to the electronic appliances. Especially in devices that rely on optical pickups for reading / writing of recorded media, such as CDs, MDs and DVDs, dampers or insulators must be used because the precision of the read operation is weakened by vibrations. [0003] Dampers have previously been designed that rely on elastic materials such as coil springs to absorb vibrations. Accordingly, a damper comprising a coil spring and silicone oil or si...

Claims

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Application Information

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IPC IPC(8): F16F15/08C08F2/50C08F283/12C08F299/08C08K3/36C08L83/07C08L83/08C09K3/00F16F1/36F16F9/30
CPCC08L83/08F16F1/3605C08F283/12F16F9/30C08F299/08C08G77/26C08G77/38C08L83/00C08L83/04
Inventor 藤泽恒俊
Owner THREEBOND FINE CHEM CO LTD
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