Information
-
Patent Grant
-
5652290
-
Patent Number
5,652,290
-
Date Filed
Tuesday, October 17, 199528 years ago
-
Date Issued
Tuesday, July 29, 199727 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
-
CPC
-
US Classifications
Field of Search
US
- 524 430
- 524 588
- 524 860
- 524 437
- 524 786
- 252 518
- 252 511
-
International Classifications
-
Abstract
Thermally conductive silicone rubber compositions, curable to elastomers having low permanent compression strain ratios, consisting of a polyorganosiloxane, a thermally conductive inorganic filler, an organosilicon compound having in each molecule at least three groups represented by the general formula of HR.sup.1.sub.2 Si, and an organic peroxide.
Claims
- 1. A silicone composition, curable to a thermally conductive silicone rubber, consisting of
- (A) 100 parts by weight of a polyorganosiloxane having the average unit formula
- R.sup.1.sub.a SiO.sub.(4-a)/2
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical, and a is a number between 1.8 and 2.3, inclusive;
- (B) 10-500 parts by weight of a thermally conductive inorganic filler;
- (C) 0.01-50 parts by weight of an organosilicon compound having in each molecule at least 3 groups represented by a general formula
- HR.sup.1.sub.2 Si
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical; and
- (D) 0.1-10 parts by weight of an organic peroxide.
- 2. The silicone composition described in claim 1, wherein component (C) is an organosilicon compound represented by the general formula
- (HR.sup.1.sub.2 SiO).sub.x R.sup.1.sub.(4-x) Si
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical and x is 3 or 4.
- 3. The silicone composition described in claim 1, wherein component (C) is an organosilicon compound represented by the general formula
- (HR.sup.1.sub.2 SiO).sub.3 Si-R.sup.2 -Si(OSiR.sup.1.sub.2 H).sub.3
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical and R.sup.2 is an alkylene group.
- 4. The silicone composition described in claim 1, wherein component (B) is alumina.
- 5. The silicone composition described in claim 2, wherein component (B) is alumina.
- 6. The silicone composition described in claim 3, wherein component (B) is alumina.
- 7. The thermally conductive silicone rubber obtained by (1) mixing
- (A) 100 parts by weight of a polyorganosiloxane having the average unit formula
- R.sup.1.sub.a SiO.sub.(4-a)/2
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical, and a is a number between 1.8 and 2.3;
- (B) 10-500 parts by weight of a thermally conductive inorganic filler;
- (C) 0.01-50 parts by weight of an organosilicon compound having in each molecule at least 3 groups represented by a general formula
- HR.sup.1.sub.2 Si
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical; and
- (D) 0.1-10 parts by weight of an organic peroxide; and (2) heating the resulting composition for a sufficient time and at a sufficeint temperature to cure the composition.
- 8. The thermally conductive silicone rubber of claim 7, wherein component (C) is an organosilicon compound represented by the general formula
- (HR.sup.1.sub.2 SiO).sub.x R.sup.1.sub.(4-x) Si
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical and x is 3 or 4.
- 9. The thermally conductive silicone rubber of claim 7, wherein component (C) is an organosilicon compound represented by the general formula
- (HR.sup.1.sub.2 SiO).sub.3 Si-R.sup.2 -Si(OSiR.sup.1.sub.2 H).sub.3
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical and R.sup.2 is an alkylene group.
- 10. The thermally conductive silicone rubber of claim 7, wherein component (B) is alumina.
- 11. The thermally conductive silicone rubber of claim 7, wherein component (B) is alumina and component (C) is an organosilicon compound represented by the general formula
- (HR.sup.1.sub.2 SiO).sub.x R.sup.1.sub.(4-x) Si
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical and x is 3 or 4.
- 12. The thermally conductive silicone rubber of claim 7, wherein component (B) is alumina and component (C) is an organosilicon compound represented by the general formula
- (HR.sup.1.sub.2 SiO).sub.3 Si-R.sup.2 -Si(OSiR.sup.1.sub.2 H).sub.3
- where R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon radical and R.sup.2 is an alkylene group.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-303228 |
Nov 1994 |
JPX |
|
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4588768 |
Streusand |
May 1986 |
|
4956203 |
Kroupa |
Sep 1990 |
|
5436288 |
Takahashi et al. |
Jul 1995 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
1215855 |
Aug 1989 |
JPX |