US4374967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature silicone gel
Assignee: Dow Silicones Corp
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Filing: 1982-02-08
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Granted: 1983-02-22
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Expires: 2002-02-08
Abstract
Abstract This invention relates to a novel low-temperature dielectric silicone gel which is the reaction product of a polyorganosiloxane consisting essentially of Me 2 SiO, MeSiO 1 .5, Me 3 SiO 0 .5 and Me 2 ViSiO 0 .5 ; an organohydrogensiloxane and a platinum catalyst.
Inventors
- 👤 Paul L. Brown
- 👤 Chi-Long Lee
- 👤 Myron T. Maxson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:54
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/045; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A curable siloxane composition comprising an intimate mixture consisting essentially of: (1) a polyorganosiloxane consisting essentially of 80 to 96.5 mol % of (CH 3 ) 2 SiO, 2.0 to 10.0 mol % of CH 3 SiO 1 .5, 1.25 to 6.0 mol % of (CH 3 ) 3 SiO 0 .5, and 0.25 to 4.0 mol % of (CH 3 ) 2 (CH 2 ═CH)SiO 0 .5 ; (2) an organohydrogensiloxane having an average of more than one silicon-bonded hydrogen atom per molecule and no more than one silicon-bonded hydrogen atom per silicon atom and organic radicals selected from the group consisting of alkyl radicals having from one to six carbon atoms per radical, phenyl and 3,3,3-trifluoropropyl, said organohydrogensiloxane providing an average of 0.2 to 5.0 moles of silicon-bonded hydrogen per mole of silicon-bonded vinyl; and (3) a platinum catalyst.
Claim 2
Dependent Claim
141 words
A curable siloxane composition comprising an intimate mixture consisting essentially of: (1) a polyorganosiloxane consisting essentially of 80 to 96.5 mol % of (CH 3 ) 2 SiO, 2.0 to 10.0 mol % of CH 3 SiO 1 .5, 1.25 to 6.0 mol % of (CH 3 ) 3 SiO 0 .5, and 0.25 to 4.0 mol % of (CH 3 ) 2 (CH 2 ═CH)SiO 0 .5 ; (2) an organohydrogensiloxane having an average of more than one silicon-bonded hydrogen atom per molecule and no more than one silicon-bonded hydrogen atom per silicon atom and organic radicals selected from the group consisting of alkyl radicals having from one to six carbon atoms per radical, phenyl and 3,3,3-trifluoropropyl, said organohydrogensiloxane providing an average of 0.2 to 5.0 moles of silicon-bonded hydrogen per mole of silicon-bonded vinyl; and (3) a platinum catalyst.
Claim 3
Dependent Claim
65 words
The curable siloxane composition according to claim 1 wherein the polyorganosiloxane consists essentially of 87 to 94 mol % of (CH 3 ) 2 SiO, 3 to 6 mol % of CH 3 SiO 1 .5, 2.5 to 5 mol % of (CH 3 ) 3 SiO 0 .5, and 0.5 to 2.0 mol % of (CH 3 ) 2 (CH 2 ═CH)SiO 0 .5.
Claim 4
Dependent Claim
65 words
The curable siloxane composition according to claim 2 wherein the polyorganosiloxane consists essentially of 92 to 94 mol % of (CH 3 ) 2 SiO, 3 to 4 mol % of CH 3 SiO 1 .5, 2.5 to 3 mol % of (CH 3 ) 3 SiO 0 .5, and 0.5 to 1 mol % of (CH 3 ) 2 (CH 2 ═CH)SiO 0 .5.
Claim 5
Dependent Claim
57 words
The curable siloxane composition according to claim 2 wherein the polyorganosiloxane consists essentially of 90.5 mol % of (CH 3 ) 2 SiO, 5.0 mol % of CH 3 SiO 1 .5, 3.8 mol % of (CH 3 ) 3 SiO 0 .5, and 0.7 mol % of (CH 3 ) 2 (CH 2 ═CH)SiO 0 .5.
Claim 6
Dependent Claim
41 words
The curable siloxane composition according to claim 1, 2, 3, or 4 wherein the organohydrogensiloxane is H(CH 3 ) 2 Si[OSi(CH 3 ) 2 ] x OSi(CH 3 ) 2 H, wherein x is within the range of 5 to 20.
Claim 7
Dependent Claim
60 words
The curable siloxane composition according to claim 1, 2, 3, or 4 wherein the organohydrogensiloxane is H(CH 3 ) 2 Si[OSi(CH 3 ) 2 ] x OSi(CH 3 ) 2 H wherein x is within the range of 5 to 20, and said organohydrogensiloxane provides an average of 0.5 to 0.95 moles of silicon-bonded hydrogen per mole of silicon-bonded vinyl.
Claim 8
Dependent Claim
29 words
The curable siloxane composition according to claim 1 wherein the platinum catalyst provides between 5 and 10 parts of the platinum atom per million parts of the total formulation.
Claim 9
Dependent Claim
33 words
The curable siloxane composition according to claim 6 wherein the platinum catalyst provides between 5 and 10 parts by weight of the platinum atom per million parts by weight of the total formulation.
Claim 10
Dependent Claim
10 words
The cured product of claim 1, 2, 3, or 4.
Claim 11
Dependent Claim
6 words
The cured product of claim 8.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |