Silicone gel composition

• US 20030050387A1
• Filed: 09/16/2002
• Published: 03/13/2003
• Est. Priority Date: 03/17/2000
• Status: Active Grant

• Current Assignee: Threebond Fine Chemical Co., Ltd.
• Original Assignee: ThreeBond Co., Ltd.
• Inventors: Fujisawa, Tsunetoshi
• Granted Patent: US 6,743,843 B2
• Time in Patent Office: Days
• US Class Current: 524/588
• CPC Class Codes: C08F 283/12 on to polysiloxanes
• CPC Class Codes: C08F 299/08 from polysiloxanes
• CPC Class Codes: C08G 77/26 nitrogen-containing groups
• CPC Class Codes: C08G 77/38 Polysiloxanes modified by chemical after-treatment C08G77/045 takes precedence
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
• CPC Class Codes: F16F 1/3605 characterised by their material F16F1/362, F16F1/364, F16F1/366, F16F1/37 take precedence; composition of macromolecular compounds in general C08L
• CPC Class Codes: F16F 9/30 with solid or semi-solid material, e.g. pasty masses, as damping medium in devices where rotary elements are damped by viscous shear effect only, any throttling effect being immaterial F16F9/12; where members moving with a rotating system are being damped F16F15/16

Abstract

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

Claims

1. 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) an atomized silica; and

an effective amount of (e) a polymerization initiator.

2. The vibration-absorbing silicone gel composition according to claim 1, wherein ingredient (a) is obtained by reacting a compound selected from vinyl-containing isocyanates, acrylic anhydride, methacrylic anhydride, acryloyl halides and methacryloyl halides, with an amino-terminated organopolysiloxane represented by the following general formula 1:

3. The vibration-absorbing silicone gel composition according to claim 2, wherein the amino-terminated organopolysiloxane is obtained by causing an organosiloxane having a silanol group at an end to add to an amino-containing organoalkoxysilane represented by the following general formula 2: