US4558147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet radiation-curable silicone release compositions
Assignee: General Electric Co
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Filing: 1983-08-26
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Granted: 1985-12-10
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Expires: 2003-08-26
Abstract
Abstract Novel UV-curable silicone release coating compositions and photocatalysts therefor are provided which include mercaptoalkoxyalkyl-functional polysiloxanes and vinyl-functional photoreactive terpolymers, both of which are especially compatable with certain perbenzoate ester photocatalysts. The addition of certain polyaromatic photosensitizers to enhance cure is also disclosed.
Inventors
- 👤 Richard P. Eckberg
- 👤 Richard A. Striker
- 👤 Frank J. Modic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:27
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/392; C09; C09D; C09D183/00; C09D183/04; C09D183/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
An odor-free mercaptoalkoxyalkyl-functional polysiloxane capable of curing to an adhesive polymeric composition on brief exposure to ultraviolet radiation in the presence of an organic compound containing ethylenic unsaturation and a catalytic amount of a photoinitiator consisting essentially of units of the formula RR'SiO, wherein R is hydrogen or C.sub.(1-8) alkyl and R' is hydrogen, C.sub.(1-8) alkyl or a monovalent mercaptoalkoxyalkyl-functional organic radical of from 2 to 20 carbon atoms, said diorganopolysiloxane having up to about 50% mercaptoalkoxyalkyl-functional groups and a viscosity of from about 50 to 10,000 centipoise at 25° C.
Claim 2
Dependent Claim
91 words
An odor-free mercaptoalkoxyalkyl-functional polysiloxane capable of curing to an adhesive polymeric composition on brief exposure to ultraviolet radiation in the presence of an organic compound containing ethylenic unsaturation and a catalytic amount of a photoinitiator consisting essentially of units of the formula RR'SiO, wherein R is hydrogen or C.sub.(1-8) alkyl and R' is hydrogen, C.sub.(1-8) alkyl or a monovalent mercaptoalkoxyalkyl-functional organic radical of from 2 to 20 carbon atoms, said diorganopolysiloxane having up to about 50% mercaptoalkoxyalkyl-functional groups and a viscosity of from about 50 to 10,000 centipoise at 25° C.
Claim 3
Dependent Claim
99 words
An odor-free mercaptoalkoxyalkyl-functional polysiloxane capable of curing to an abhesive polymeric composition on brief exposure to ultraviolet radiation in the presence of an organic compound containing ethylenic unsaturation and a catalytic amount of a photoinitiator, consisting essentially of the composition obtained by by (1) reacting a dialkylhydrogen-chainstopped polydialkyl-alkylhydrogensiloxane copolymer with an ω-halo-alkene in the presence of a precious metal hydrosilation catalyst, and (2) reacting the product of (1) with a hydroxy-functional thiol of the formula HO--R"--SH, wherein R" is a divalent alkylene or alkyl ketone radical of from 2 to 20 carbon atoms in the presence of an amine.
Claim 4
Dependent Claim
99 words
An odor-free mercaptoalkoxyalkyl-functional polysiloxane capable of curing to an abhesive polymeric composition on brief exposure to ultraviolet radiation in the presence of an organic compound containing ethylenic unsaturation and a catalytic amount of a photoinitiator, consisting essentially of the composition obtained by by (1) reacting a dialkylhydrogen-chainstopped polydialkyl-alkylhydrogensiloxane copolymer with an ω-halo-alkene in the presence of a precious metal hydrosilation catalyst, and (2) reacting the product of (1) with a hydroxy-functional thiol of the formula HO--R"--SH, wherein R" is a divalent alkylene or alkyl ketone radical of from 2 to 20 carbon atoms in the presence of an amine.
Claim 5
Dependent Claim
24 words
An odor-free mercaptoalkoxyalkyl-functional diorganopolysiloxane as defined in claim 2, wherein said ω-halo-alkene is methallyl chloride and said hydroxy-functional thiol is β-mercaptoethanol or γ-mercaptopropionic acid.
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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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |