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Patent US4322326A successfully refreshed from Google Patents.
US4322326A
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Ethylene-vinyl ester copolymer blended with dibasic acid-modified rosin ester
Assignee: Millennium Petrochemicals Inc
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Filing: 1981-02-09
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Granted: 1982-03-30
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Expires: 2001-02-09
Abstract
Abstract A coating composition of enhanced physical characteristics such as those of hardness, flexibility and/or ultra-violet resistance is provided which comprises a mixture of ethylene-vinyl ester copolymer containing at least about 55% by weight of interpolymerized vinyl ester and a dibasic acid-modified rosin ester of a rosin acid and a polyhydric alcohol containing from 2 to 6 hydroxyl groups, said dibasic acid-modified rosin ester being present in said composition at a level of at least about 30% by weight.
Inventors
- 👤 Lorrin W. Pyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:11
CPC Classifications
C; C09; C09D; C09D193/00; C09D193/04; C09D131/00; C09D131/02; C09D131/04; C08; C08L; C08L93/00; C08L93/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A composition comprising a mixture of ethylene-vinyl ester copolymer containing at least about 55% by weight of interpolymerized vinyl ester and a dibasic acid-modified rosin ester of a rosin acid and a polyhydric alcohol containing from 2 to 6 hydroxyl groups, said dibasic acid-modified rosin ester being present in said composition at a level of at least about 30% by weight.
Claim 2
Dependent Claim
61 words
A composition comprising a mixture of ethylene-vinyl ester copolymer containing at least about 55% by weight of interpolymerized vinyl ester and a dibasic acid-modified rosin ester of a rosin acid and a polyhydric alcohol containing from 2 to 6 hydroxyl groups, said dibasic acid-modified rosin ester being present in said composition at a level of at least about 30% by weight.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the vinyl ester is vinyl acetate.
Claim 4
Dependent Claim
22 words
The composition of claim 2 wherein the ethylene-vinyl acetate contains from about 60 to about 75% by weight of interpolymerized vinyl acetate.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein the dibasic acid-modified rosin ester is an ester of a rosin acid and pentaerythritol ester of rosin.
Claim 6
Dependent Claim
19 words
The composition of claim 1 containing from about 60% to about 80% by weight of dibasic acid-modified rosin ester.
Claim 7
Dependent Claim
15 words
The composition of claim 1 dissolved in an organic solvent or mixture of organic solvents.
Claim 8
Dependent Claim
11 words
The composition of claim 6 wherein the organic solvent is toluene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-29 | 1985-09-28 | 1986-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-29 | 1989-09-28 | 1990-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-29 | 1993-09-28 | 1994-03-30 | $7700.00 | Window Closed / Lapsed |