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US4230740A
Expired / Lapsed
US
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Heat stable, non-yellowing photopolymer compositions
Assignee: WR Grace and Co Conn
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Filing: 1979-04-23
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Granted: 1980-10-28
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Expires: 1999-04-23
Abstract
Abstract This invention relates to heat stable, non-yellowing photopolymer compositions comprising a polythiol, a photoinitiator and a polyene of the formula: <IMAGE> wherein R are all the same member of the group consisting of <IMAGE> <IMAGE> R1 is -CH3 or R, and R' is -CH3 or H. The UV cured coating resulting from this composition are non-yellowing even after baking for 15 minutes at 450 DEG F.
Inventors
- 👤 Joseph D. Moyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:38
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/12; C08G75/02; C08G75/04; C08G75/045; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/0275
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
The process of forming a non-yellowing, cured polythioether heat stable at 450° F. for at least 15 minutes which comprises admixing a composition comprising a polythiol, a photoinitiator and a polyene of the formula: ##STR21## wherein R are all the same member of the group consisting of ##STR22## R 1 is --CH 3 or R, and R' is --CH 3 or H and thereafter exposing said composition to UV radiation.
Claim 2
Dependent Claim
70 words
The process of forming a non-yellowing, cured polythioether heat stable at 450° F. for at least 15 minutes which comprises admixing a composition comprising a polythiol, a photoinitiator and a polyene of the formula: ##STR21## wherein R are all the same member of the group consisting of ##STR22## R 1 is --CH 3 or R, and R' is --CH 3 or H and thereafter exposing said composition to UV radiation.
Claim 3
Dependent Claim
82 words
The process of forming a non-yellowing coating on a substrate said coating being heat stable at 450° F. for at least 15 minutes which comprises applying to the substrate a layer of a photocurable composition comprising a polythiol, a photoinitiator and a polyene of the formula: ##STR23## wherein R are all the same member of the group consisting of ##STR24## R 1 is --CH 3 or R, and R' is --CH 3 or H and thereafter exposing said composition to UV radiation.
Claim 4
Dependent Claim
82 words
The process of forming a non-yellowing coating on a substrate said coating being heat stable at 450° F. for at least 15 minutes which comprises applying to the substrate a layer of a photocurable composition comprising a polythiol, a photoinitiator and a polyene of the formula: ##STR23## wherein R are all the same member of the group consisting of ##STR24## R 1 is --CH 3 or R, and R' is --CH 3 or H and thereafter exposing said composition to UV radiation.
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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |