Patent US3969296A successfully refreshed from Google Patents.
US3969296A
Expired / Lapsed
US
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Vinyl ester copolymer latices and their preparation
Assignee: Shell USA Inc
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Filing: 1975-02-18
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Granted: 1976-07-13
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Expires: 1995-02-18
Abstract
Abstract The preparation of vinyl ester copolymers is described. More particularly, vinyl ester copolymer latices are described which exhibit improved scrub resistance when applied to existing paint films.
Inventors
- 👤 Teunis C. Wassenburg
- 👤 William J. Van Westrenen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:43
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/14; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
A process for the preparation of vinyl ester latices having improved scrub resistance which comprises first copolymerizing in an aqueous emulsion medium a composition comprising 1. from 10 to 50% of a vinyl ester of a saturated aliphatic alpha-branched monocarboxylic acid with 2. from 0.5 to 5.0% of a glycidyl ester of an alpha, beta-ethylenically unsaturated carboxylic acid having from 3 to 4 carbon atoms, 3. from 49.5 to 89.5% of vinyl acetate or vinyl chloride, 4. from 0.5 to 5.0% of an alphatic alpha, beta-ethylenically unsaturated carboxylic acid having 3 to 4 carbon atoms or a partial ester thereof, and then reacting at from 60° to 90°C the resulting copolymer with ammonia in an amount sufficient to convert at least 50% of the glycidyl groups into hydroxyaminopropyl groups, said percentages being by weight based on total monomers.
Claim 2
Dependent Claim
138 words
A process for the preparation of vinyl ester latices having improved scrub resistance which comprises first copolymerizing in an aqueous emulsion medium a composition comprising 1. from 10 to 50% of a vinyl ester of a saturated aliphatic alpha-branched monocarboxylic acid with 2. from 0.5 to 5.0% of a glycidyl ester of an alpha, beta-ethylenically unsaturated carboxylic acid having from 3 to 4 carbon atoms, 3. from 49.5 to 89.5% of vinyl acetate or vinyl chloride, 4. from 0.5 to 5.0% of an alphatic alpha, beta-ethylenically unsaturated carboxylic acid having 3 to 4 carbon atoms or a partial ester thereof, and then reacting at from 60° to 90°C the resulting copolymer with ammonia in an amount sufficient to convert at least 50% of the glycidyl groups into hydroxyaminopropyl groups, said percentages being by weight based on total monomers.
Claim 3
Dependent Claim
27 words
A process as in claim 1 wherein component (1) is a vinyl ester of a saturated aliphatic monocarboxylic acid having 9 to 11 carbon atoms per molecule.
Claim 4
Dependent Claim
12 words
A process as in claim 1 wherein component (2) is glycidyl methacrylate.
Claim 5
Dependent Claim
17 words
A process as in claim 3 wherein the amount of glycidyl methacrylate is from 0.5 to 3.0%.
Claim 6
Dependent Claim
24 words
A process as in claim 1 wherein the copolymer formed is reacted with sufficient ammonia to convert all the glycidyl groups into hydroxyaminopropyl groups.
Claim 7
Dependent Claim
118 words
A process for the preparation of a vinyl ester copolymer latex having improved scrub resistance which comprises A. first copolymerizing in an aqueous emulsion medium a composition comprising 1. from 10 to 50% of a vinyl ester of a saturated alpha-branched monocarboxylic acid having from 9 to 11 carbon atoms per molecule, 2. from 49.5 to 89.5% of vinyl acetate, 3. from 0.5 to 5.0% of glycidyl methacrylate, and 4. from 0.5 to 5% of acrylic acid, and B. then reacting the resulting copolymer at from 60° to 90°C with ammonia in an amount sufficient to convert at least 50% of the glycidyl groups into hydroxyaminopropyl groups, said percentages being by weight based on the total monomers present.
Claim 8
Dependent Claim
118 words
A process for the preparation of a vinyl ester copolymer latex having improved scrub resistance which comprises A. first copolymerizing in an aqueous emulsion medium a composition comprising 1. from 10 to 50% of a vinyl ester of a saturated alpha-branched monocarboxylic acid having from 9 to 11 carbon atoms per molecule, 2. from 49.5 to 89.5% of vinyl acetate, 3. from 0.5 to 5.0% of glycidyl methacrylate, and 4. from 0.5 to 5% of acrylic acid, and B. then reacting the resulting copolymer at from 60° to 90°C with ammonia in an amount sufficient to convert at least 50% of the glycidyl groups into hydroxyaminopropyl groups, said percentages being by weight based on the total monomers present.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |