US4549945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
UV Cured polyurethanes using organotin promoters
Assignee: Phillips Petroleum Co
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Filing: 1984-01-11
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Granted: 1985-10-29
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Expires: 2004-01-11
Abstract
Abstract A photocurable composition consisting essentially of the mixture of a diisocyanate compound, a polyol and certain UV light sensitive organotin compounds. The photocurable composition is cured by exposing it to ultraviolet light in the wavelength range of 2000 to 4000 Angstroms for a period of about 0.1 second to about 20 minutes at a temperature in the range of about 0° F. to about 180° F.
Inventors
- 👤 Merlin R. Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/242
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A photocurable composition consisting essentially of a mixture of (a) a diisocyanate of the formula OCN--R"--NCO wherein R" is a C 4 to C 20 alkylene, arylene, alkarylene, or aralkylene radical; (b) a polyol; and (c) at least one organotin compound of the formula ##STR2## wherein each R 1 independently represents a C 3 to C 10 branched alkyl, cycloalkyl, or aryl radical; wherein the amount of said organotin compound is about 0.1 to 5.0 weight percent based on the total weight of the diisocyanate/polyol/organotin reaction mixture and wherein the ratio of said diisocyanate to said polyol is about 1:1 to 1:1.2 based on the equivalent weights of said diisocyanate and said polyol.
Claim 2
Dependent Claim
113 words
A photocurable composition consisting essentially of a mixture of (a) a diisocyanate of the formula OCN--R"--NCO wherein R" is a C 4 to C 20 alkylene, arylene, alkarylene, or aralkylene radical; (b) a polyol; and (c) at least one organotin compound of the formula ##STR2## wherein each R 1 independently represents a C 3 to C 10 branched alkyl, cycloalkyl, or aryl radical; wherein the amount of said organotin compound is about 0.1 to 5.0 weight percent based on the total weight of the diisocyanate/polyol/organotin reaction mixture and wherein the ratio of said diisocyanate to said polyol is about 1:1 to 1:1.2 based on the equivalent weights of said diisocyanate and said polyol.
Claim 3
Dependent Claim
24 words
A composition according to claim 1 wherein said diisocyanate is the reaction product of 3 moles of hexamethylene diisocyanate and 1 mole of water.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 wherein said polyol is a copolymer based on styrene and allyl alcohol.
Claim 5
Dependent Claim
12 words
A composition according to claim 1 wherein said organotin compound is octa-tert-butyl-tetrastanna-cyclobutane.
Claim 6
Dependent Claim
30 words
A composition according to claim 1 wherein the amount of organotin compound employed is about 0.3 to 3.0 weight percent based on the total weight of the diisocyanate/polyol/organotin reaction mixture.
Claim 7
Dependent Claim
31 words
A composition according to claim 1 wherein the ratio of said diisocyanate to said polyol is about 1:1 to 1:1.2 based on the equivalent weights of said diisocyanate and said polyol.
Claim 8
Dependent Claim
161 words
A process for the curing of a photocurable composition consisting essentially of a mixture of (a) a diisocyanate of the formula OCN--R"--NCO wherein R" is a C 4 to C 20 alkylene, arylene, alkarylene, or aralkylene radical; (b) a polyol; and (c) at least one organotin compound of the formula ##STR3## wherein each R 1 independently represents a C 3 to C 10 branched alkyl, cycloalkyl, or aryl radical; wherein the amount of said organotin compound is about 0.1 to 5.0 weight percent based on the total weight of the diisocyanate/polyol/organotin reaction mixture and wherein the ratio of said diisocyanate to said polyol is about 1:1 to 1:1.2 based on the equivalent weights of said diisocyanate and said polyol, which comprises exposing said photocurable composition to ultraviolet light in the wavelength range of 2000 to 4000 Angstroms for a period of 0.1 second to about 20 minutes at a temperature in the range of about 0° F. to about 180° F.
Claim 9
Dependent Claim
161 words
A process for the curing of a photocurable composition consisting essentially of a mixture of (a) a diisocyanate of the formula OCN--R"--NCO wherein R" is a C 4 to C 20 alkylene, arylene, alkarylene, or aralkylene radical; (b) a polyol; and (c) at least one organotin compound of the formula ##STR3## wherein each R 1 independently represents a C 3 to C 10 branched alkyl, cycloalkyl, or aryl radical; wherein the amount of said organotin compound is about 0.1 to 5.0 weight percent based on the total weight of the diisocyanate/polyol/organotin reaction mixture and wherein the ratio of said diisocyanate to said polyol is about 1:1 to 1:1.2 based on the equivalent weights of said diisocyanate and said polyol, which comprises exposing said photocurable composition to ultraviolet light in the wavelength range of 2000 to 4000 Angstroms for a period of 0.1 second to about 20 minutes at a temperature in the range of about 0° F. to about 180° F.
Claim 10
Dependent Claim
12 words
A process according to claim 7 wherein said organotin compound is octa-tert-butyl-tetrastanna-cyclobutane.
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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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |