US4666953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone polyphotoinitiators
Assignee: Henkel Loctite Corp
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Filing: 1985-03-28
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Granted: 1987-05-19
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Expires: 2005-03-28
Abstract
Abstract Polyorganosiloxanes having an average of more than two siloxane repeat units, at least one of which repeat units includes a photoinitiating group bound to the silicon atom thereof, the photoinitiating group having the formula ##STR1## where R 1 and R 2 are the same or different alkyl groups or R 1 and R 2 are alkylene groups linked to each other so that R 1 and R 2 together with the carbon atom to which both are attached comprise a cycloalkyl group, and R 3 is H or hydrocarbyl. Compositions of these polyorganosiloxanes and silicones or organic monomers with free radical curable groups are readily cured by irradiation with UV light.
Inventors
- 👤 Philip Klemarczyk
- 👤 Steven T. Nakos
- 👤 Samuel Q. S. Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0757; C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08G; C08G77/00; C08G77/04; C08G77/38; C08L; C08L83/00; C08L83/04; C08G77/12; C08G77/14; C08G77/20; C08G77/22; C08G77/28; C08G77/70; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A photocurable composition comprising a free radical curable silicone and, as a photoinitiator, a polyorganosiloxane having an average of more than two siloxane repeat units, at least one of which repeat units includes a photoinitiating group bound to the silicon atom thereof, the photoinitiating group having the formula: ##STR7## where R 1 and R 2 are the same or different alkyl groups or R 1 and R 2 are alkylene groups linked to each other so that R 1 and R 2 together with the carbon atom to which both are attached comprise a cycloalkyl group and R 3 is H or hydrocarbyl.
Claim 2
Dependent Claim
103 words
A photocurable composition comprising a free radical curable silicone and, as a photoinitiator, a polyorganosiloxane having an average of more than two siloxane repeat units, at least one of which repeat units includes a photoinitiating group bound to the silicon atom thereof, the photoinitiating group having the formula: ##STR7## where R 1 and R 2 are the same or different alkyl groups or R 1 and R 2 are alkylene groups linked to each other so that R 1 and R 2 together with the carbon atom to which both are attached comprise a cycloalkyl group and R 3 is H or hydrocarbyl.
Claim 3
Dependent Claim
14 words
A composition as in claim 1 wherein R 3 is H, methyl or phenyl.
Claim 4
Dependent Claim
19 words
A composition as in claim 1 where R 1 and R 2 are selected from methyl and ethyl groups.
Claim 5
Dependent Claim
26 words
A composition as in claim 1 where R 1 and R 2 together with the carbon atom to which they are attached comprise a cyclohexyl group.
Claim 6
Dependent Claim
33 words
A composition as in claim 1 wherein the free radical curable silicone is a polyorganosiloxane which includes free radically curable groups selected from (meth)acrylate, vinyl, alkylthiol, maleate, itaconate, styryl, and silicon hydride groups.
Claim 7
Dependent Claim
40 words
A composition as in claim 1 wherein said photoinitiator polyorganosiloxane further includes a plurality of free radical curable groups, bound to the polymer backbone, said free radical curable groups selected from (meth)acrylate, vinyl, alkylthiol, maleate, itaconate, styryl and silicon hyride.
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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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |