US4422914A
Expired / Lapsed
US
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Polymer composition having terminal alkene and terminal carboxyl groups
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1981-01-16
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Granted: 1983-12-27
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Expires: 2001-01-16
Abstract
Abstract A polymer composition comprising a urethane having terminal unsaturation and a terminal carboxyl group and which is capable of further free radical polymerization has been synthesized. This polymer can be a liquid or a solid depending on the molecular weight and backbone of the polymer. This polymer as a liquid has been found to be very useful in producing printed circuit boards by photo resist processes.
Inventors
- 👤 Jung-Hsien Tsao
- 👤 Paul R. Hein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175; C08G18/83; C08G18/831; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A polymer composition wherein the polymer consists essentially of a polymer having having a molecular weight of about 250 to 10,000 and acid content of about 0.1 to 4.0 mille-equivalents/gram comprising a terminal carboxyl group at one end and a single terminal alkene unsaturation at the other end, said carboxyl group and alkene unsaturation being in a ratio on said polymer of about 1 to 1.
Claim 2
Dependent Claim
66 words
A polymer composition wherein the polymer consists essentially of a polymer having having a molecular weight of about 250 to 10,000 and acid content of about 0.1 to 4.0 mille-equivalents/gram comprising a terminal carboxyl group at one end and a single terminal alkene unsaturation at the other end, said carboxyl group and alkene unsaturation being in a ratio on said polymer of about 1 to 1.
Claim 3
Dependent Claim
12 words
A polymer as in claim 1 included in a photopolymerizable liquid composition.
Claim 4
Dependent Claim
15 words
A polymer as in claim 1, wherein said terminal carboxyl group has alpha alkene unsaturation.
Claim 5
Dependent Claim
67 words
A polymer as in claim 1 having the formula: ##STR6## wherein R 1 is hydrogen, methyl or ethyl, R 2 is alkyl of from 1 to 6 carbon atoms, R 3 is alkyl, aryl or alkylaryl, (PE) is selected from the group consisting of polyethers, polyesters and mixtures thereof, x is an integer of from 2 to 50 and R 4 is alkyl, alkene, aryl or alicyclic.
Claim 6
Dependent Claim
16 words
A polymer as in claim 4, wherein R 3 is aryl and R 4 is ethylene.
Claim 7
Dependent Claim
16 words
A polymer as in claim 4, wherein R 3 is alkyl and R 4 is ethylene.
Claim 8
Dependent Claim
19 words
A polymer as in claim 6 included in a composition which includes a photoinitiator for promoting free radical generation.
Claim 9
Dependent Claim
26 words
A polymer composition as in claim 7 wherein said photoinitiator is selected from the group consisting of benzophenone, acetophenone, acenaphthenequinone, o-methoxy benzophenone, hexanophenone and 2,2-dimethoxy-2-phenyl acetophenone.
Claim 10
Dependent Claim
22 words
A polymer composition as in claim 7 which includes chain bridging agents selected from the group consisting of multi-functional acrylates and thiols.
Claim 11
Dependent Claim
22 words
A polymer composition as in claim 9 wherein said composition is liquid, said acrylate is hexanediol diacrylate and said thiol is pentaerythritol-terta-kis-(B-mercaptonpropionate).
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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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |