Patent US4088618A successfully refreshed from Google Patents.
US4088618A
Expired / Lapsed
US
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Rosin-modified epoxy resins
Assignee: Sun Chemical Corp
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Filing: 1975-11-04
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Granted: 1978-05-09
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Expires: 1995-11-04
Abstract
Abstract The properties of photocurable printing inks and coating compositions comprising an ethylenically unsaturated monomeric compound, a photoinitiator, and optionally a colorant are improved by the addition of certain rosin-modified epoxy resins.
Inventors
- 👤 Ronald Saltzman
- 👤 William J. Ferrara
- 👤 Olgierd Wasilewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:05
CPC Classifications
C; C09; C09F; C09F1/00; C09F1/04; C08; C08L; C08L63/00; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/31794; Y10T428/31844
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A rosin-modified epoxy resin prepared by heating at a temperature of about 140°-220° C. (a) an epoxy resin having the formula ##STR2## wherein R is the divalent hydrocarbon radical of the dihydric phenol and n is an integer of at least 1 and (b) tail oil rosin, hydrogenated wood rosin, dehydrogenated wood rosin, polymerized wood rosin, or gum rosin, the equivalent ratio of rosin acid to epoxy resin being about 0.85-1:1.
Claim 2
Dependent Claim
71 words
A rosin-modified epoxy resin prepared by heating at a temperature of about 140°-220° C. (a) an epoxy resin having the formula ##STR2## wherein R is the divalent hydrocarbon radical of the dihydric phenol and n is an integer of at least 1 and (b) tail oil rosin, hydrogenated wood rosin, dehydrogenated wood rosin, polymerized wood rosin, or gum rosin, the equivalent ratio of rosin acid to epoxy resin being about 0.85-1:1.
Claim 3
Dependent Claim
15 words
The rosin-modified epoxy resin of claim 1 wherein the reaction temperature is about 150°-185° C.
Claim 4
Dependent Claim
17 words
The rosin-modified epoxy resin of claim 1 wherein the epoxy resin is a Bisphenol A epichlorohydrin resin.
References Cited (Backward Citations)
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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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |