Silicone gel composition
First Claim
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.
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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.
11 Citations
7 Claims
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1. A vibration-absorbing silicone gel composition mainly comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
(wherein R and R are divalent hydrocarbon groups;
R3 is a monovalent hydrocarbon group;
R4 is hydrogen or a monovalent hydrocarbon group;
R5 is hydrogen or a monovalent hydrocarbon group or substituted hydrocarbon group;
R6 is a monovalent hydrocarbon group;
1 is an integer of 0 to 4;
n is an integer of 1 to 3; and
m is an integer of 50 to 10,000).
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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:
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(wherein R1 and R2 are divalent hydrocarbon groups;
R3 is a monovalent hydrocarbon group;
R4 is hydrogen or a monovalent hydrocarbon group;
R5 is hydrogen group or a monovalent hydrocarbon group or substituted hydrocarbon group;
X is an alkoxy group;
n is 0 or 1; and
1 is an integer of 0 to
4).
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4. The vibration-absorbing silicone gel composition according to claim 2, wherein R1 and R2 are alkylene groups having 1 to 4 carbon atoms or arylene groups;
- R3 is an alkyl group having 1 to 4 carbon atoms or an aryl group;
R4 is an alkyl group or an arylalkyl group;
R5 is allyl, an alkyl group or a di- or trialkoxysilylalkyl group; and
R6 is an alkyl group having 1 to 4 carbon atoms or an aryl group.
- R3 is an alkyl group having 1 to 4 carbon atoms or an aryl group;
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5. The vibration-absorbing silicone gel composition according to claim 4, wherein R1 and R2 are alkylene groups having 1 to 4 carbon atoms or phenylene;
- and R4 is methyl or benzyl.
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6. The vibration-absorbing silicone gel composition according to claim 3, wherein R1 and R2 are alkylene groups having 1 to 4 carbon atoms or arylene groups;
- R3 is an alkyl group having 1 to 4 carbon atoms or an aryl group;
R4 is an alkyl group or an arylalkyl group;
R5 is allyl, an alkyl group or a di- or trialkoxysilylalkyl group; and
R6 is an alkyl group having 1 to 4 carbon atoms or an aryl group.
- R3 is an alkyl group having 1 to 4 carbon atoms or an aryl group;
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7. The vibration-absorbing silicone composition according to claim 6, wherein R1 and R2 are alkylene groups having 1 to 4 carbon atoms or phenylene;
- and R4 is methyl or benzyl.
Specification