Patent US4980443A successfully refreshed from Google Patents.
US4980443A
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Fluorosilicone compounds and compositions for adhesive release liners
Assignee: Dow Silicones Corp
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Filing: 1990-06-04
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Granted: 1990-12-25
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Expires: 2010-06-04
Abstract
Abstract A new organohydrogenpolysiloxane compound and a new fluorosilicone polymer each have unique properties which allow for the preparation of faster curing coating compositions having longer bath life than those disclosed in the art. In a preferred embodiment the new polymers are mixed together to provide, along with a metal-containing hydrosilylation catalyst and a catalyst inhibitor to provide improved coating compositions which are useful for preparing a release linear to protect silicone pressure sensitive adhesives.
Inventors
- 👤 Craig K. Kendziorski
- 👤 Charles E. Neal, Jr.
- 👤 Loretta A. Sobieski
- 👤 Thomas J. Tangney
- 👤 David L. Stickles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:55
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/24; C09; C09D; C09D183/00; C09D183/04; C09D183/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
An organohydrogenpolysiloxane compound having the formula Me 3 SiO(MeHSiO) m {(RQ)MeSiO} n SiMe 3 , wherein m+n has a value of from 20 to 80, m/(m+n) has a value of 0.6 to 0.8, Me denotes a methyl radical, RQ denotes a silicon-bonded fluorinated radical wherein R denotes a perfluoroalkyl radical having from 4 to 8 carbon atoms and Q denotes an alkylene radical linking R to Si through at least 2 carbon atoms.
Claim 2
Dependent Claim
73 words
An organohydrogenpolysiloxane compound having the formula Me 3 SiO(MeHSiO) m {(RQ)MeSiO} n SiMe 3 , wherein m+n has a value of from 20 to 80, m/(m+n) has a value of 0.6 to 0.8, Me denotes a methyl radical, RQ denotes a silicon-bonded fluorinated radical wherein R denotes a perfluoroalkyl radical having from 4 to 8 carbon atoms and Q denotes an alkylene radical linking R to Si through at least 2 carbon atoms.
Claim 3
Dependent Claim
38 words
An organohydrogenpolysiloxane compound according to claim 1 wherein RQ has the formula CF 3 CF 2 CF 2 CF 2 CH 2 CH 2 , m has a value of 28 and n has a value of 12.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |