US4221892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocurable partially esterified polyepoxides
Assignee: Dow Chemical Co
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Filing: 1978-11-30
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Granted: 1980-09-09
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Expires: 1998-11-30
Abstract
Abstract An ultraviolet light curable resin composition comprises a mixture of entities including a polyepoxide, a partial or complete unsaturated ester of the same polyepoxide, and a partial or complete hydrolysis product of the same polyepoxide. This resin composition exhibits improved adhesion to metals.
Inventors
- 👤 Lynne B. Baron
- 👤 George A. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1494; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08L; C08L63/00; C08L63/10; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
An ultraviolet radiation curable resin composition comprising a mixture of polymerizable entities including (1) a polyepoxide, (2) an epoxy ester resulting from partial or complete esterification of the epoxy groups of a portion of said polyepoxide with an unsaturated carboxylic acid and (3) a partially or completely hydrolyzed portion of said polyepoxide, said composition prepared by the process comprising the mixing of a polyepoxide, from 10 to 90 mole percent based on oxirane groups of an unsaturated monocarboxylic acid and at least 0.6 equivalent water per equivalent of oxirane groups, an addition polymerization inhibitor and a catalyst for the esterification reaction of carboxyl groups with oxirane groups and reacting the ingredients at elevated temperature under conditions to prevent loss of water until substantially all of said acid has been esterified and subsequently removing excess water.
Claim 2
Dependent Claim
135 words
An ultraviolet radiation curable resin composition comprising a mixture of polymerizable entities including (1) a polyepoxide, (2) an epoxy ester resulting from partial or complete esterification of the epoxy groups of a portion of said polyepoxide with an unsaturated carboxylic acid and (3) a partially or completely hydrolyzed portion of said polyepoxide, said composition prepared by the process comprising the mixing of a polyepoxide, from 10 to 90 mole percent based on oxirane groups of an unsaturated monocarboxylic acid and at least 0.6 equivalent water per equivalent of oxirane groups, an addition polymerization inhibitor and a catalyst for the esterification reaction of carboxyl groups with oxirane groups and reacting the ingredients at elevated temperature under conditions to prevent loss of water until substantially all of said acid has been esterified and subsequently removing excess water.
Claim 3
Dependent Claim
18 words
The composition claimed in claim 1 wherein from 40 to 75 percent of the epoxy groups are esterified.
Claim 4
Dependent Claim
17 words
The composition claimed in claim 1 wherein said polyepoxide is the diglycidyl ether of a polyhydric phenol.
Claim 5
Dependent Claim
16 words
The composition claimed in claim 3 wherein said polyepoxide is the diglycidyl ether of bisphenol A.
Claim 6
Dependent Claim
13 words
The composition claimed in claim 1 wherein said carboxylic acid is acrylic acid.
Claim 7
Dependent Claim
93 words
A process for preparing an ultraviolet radiation curable resin composition, said process comprising the mixing of a polyepoxide, from 10 to 90 mole percent based on oxirane groups of an unsaturated carboxylic acid, at least 0.6 equivalent water per equivalent of oxirane groups, an addition polymerization inhibitor and a catalyst for the esterification reaction of carboxyl groups with oxirane groups; and reacting the ingredients at elevated temperature under conditions to prevent loss of water until substantially all of said acid has been esterified and oxirane groups hydrolyzed and subsequently removing the excess water.
Claim 8
Dependent Claim
93 words
A process for preparing an ultraviolet radiation curable resin composition, said process comprising the mixing of a polyepoxide, from 10 to 90 mole percent based on oxirane groups of an unsaturated carboxylic acid, at least 0.6 equivalent water per equivalent of oxirane groups, an addition polymerization inhibitor and a catalyst for the esterification reaction of carboxyl groups with oxirane groups; and reacting the ingredients at elevated temperature under conditions to prevent loss of water until substantially all of said acid has been esterified and oxirane groups hydrolyzed and subsequently removing the excess water.
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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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |