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US4255243A
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Unsaturated poly-(carbonate-urethanes) and their applications to photocrosslinking
Assignee: Societe Nationale des Poudres et Explosifs
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Filing: 1979-07-02
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Granted: 1981-03-10
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Expires: 1999-07-02
Abstract
Abstract The invention relates, by way of new products, to poly-(carbonate-urethanes) with acrylic or methacrylic acid terminal groups, of the formula <IMAGE> in which X represents either hydrogen or the methyl group, R represents a substituted or unsubstituted alkylene, cycloalkylene or arylene radical, R' represents a lower alkylene radical, Z represents a polycarbonate chain and C, H, N and O respectively represent carbon, hydrogen, nitrogen and oxygen. The unsaturated poly-(carbonate-urethanes) according to the invention are obtained by condensing a diisocyanate with a polycarbonate-diol and a lower hydroxyalkyl acrylate or methacrylate. They constitute a base for photocrosslinkable compositions which resist hydrolysis and possess a good adhesion.
Inventors
- 👤 Annick G. Coqueugniot
- 👤 Robert J. Bruggeman
- 👤 Marc D. Piteau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/44; C08G18/67; C08G18/671; C08G18/672; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
The compounds poly-(carbonate-urethanes) with acrylic unsaturations, of the formula ##STR6## in which: X is hydrogen or methyl, R is a substituted or unsubstituted alkylene, cycloalkylene or arylene radical, R' is a lower alkylene radical, Z is a polycarbonate chain originating from a hydroxytelechelating, aliphatic or cycloaliphatic, linear polycarbonate having a molecular weight of between 500 and 3,000 and C,H,N and O respectively are carbon hydrogen, nitrogen and oxygen.
Claim 2
Dependent Claim
68 words
The compounds poly-(carbonate-urethanes) with acrylic unsaturations, of the formula ##STR6## in which: X is hydrogen or methyl, R is a substituted or unsubstituted alkylene, cycloalkylene or arylene radical, R' is a lower alkylene radical, Z is a polycarbonate chain originating from a hydroxytelechelating, aliphatic or cycloaliphatic, linear polycarbonate having a molecular weight of between 500 and 3,000 and C,H,N and O respectively are carbon hydrogen, nitrogen and oxygen.
Claim 3
Dependent Claim
67 words
The compound poly-(carbonate-urethanes) with acrylic unsaturations, according to claim 1, which has the formula ##STR7## in which: X is hydrogen or methyl, R is a substituted or unsubstituted alkylene, cycloalkylene or arylene radical, Z is a polycarbonate chain originating from a hydroxytelechelating, aliphatic or cycloaliphatic, linear polycarbonate having a molecular weight of between 500 and 3,000 and C,H,N and O respectively are carbon, hydrogen, nitrogen and oxygen.
Claim 4
Dependent Claim
27 words
Photocrosslinkable compositions comprising an unsaturated polymer, an unsaturated monomer and a photoinitiator, wherein the said unsaturated polymer is a poly-(carbonate-urethane) with acrylic unsaturations, according to claim 1.
Claim 5
Dependent Claim
19 words
Photocrosslinkable compositions according to claim 2, wherein the said unsaturated monomer is a polyfunctional acrylate of low molecular weight.
Claim 6
Dependent Claim
26 words
Photocrosslinkable compositions according to claim 3, wherein the unsaturated monomer is a member selected from the group consisting of pentaerythritol triacrylate, trimethylolpropane triacrylate and hexane-1,6-diol diacrylate.
Claim 7
Dependent Claim
32 words
Photocrosslinkable compositions according to any one of claims 2 to 4, wherein the photoinitiator is chosen from the group comprising benzoin ethers, acetophenone derivatives, and benzophenone in a mixture with an amine.
Claim 8
Dependent Claim
17 words
Films obtained by the photocrosslinking of a composition according to any one of claims 3 to 6.
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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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |