US4322322A
Expired / Lapsed
US
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Method for preparing a water-containing vinyl acetate polymer dispersion, dispersion thus prepared and protective colloid used thereby
Assignee: Graanderivaten Raffinaderijen Amylum Vroeger Glucoseries Reunies
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Filing: 1980-06-20
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Granted: 1982-03-30
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Expires: 2000-06-20
Abstract
Abstract For preparing a water-containing vinyl acetate polymer dispersion, vinyl acetate monomer and initiator are added to a water solution from an emulsifier and hydroxypropyl starch and/or hydroxyethyl starch. The emulsifier amount is equal to 0,5 to 5 weight % from the monomer amount. The degree of substitution of the starch is higher than 0,8 substituted glucose hydroxyl groups per anhydroglucose unit and lies more specially between 0,8 and 1,8 substituted glucose hydroxyl groups per anhydroglucose unit, when the starch is hydroxypropyl starch or between 0,8 and 2,75 substituted glucose hydroxyl groups per anhydroglucose unit, when the starch is hydroxyethyl starch.
Inventors
- 👤 Peter F. T. Lambrechts
- 👤 Jozef H. R. Van Der Meeren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:31
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
A method for preparing a water-containing vinyl acetate polymer dispersion, comprising adding vinyl acetate monomer and initiator to a water solution from an emulsifier and an amount, between 0.1 and 6 weight % from the monomer amount, of hydroxypropyl and/or hydroxyethyl starch, in which the emulsifier amount is equal to 0.8 to 2.3 weight % from the monomer amount, and the degree of substitution of the starch lies between 0.9 and 1.6 hydroxypropyl groups per anhydroglucose unit for the hydroxypropyl starch and between 0.9 and 2.7 hydroxyethyl groups per anhydroglucose unit for the hydroxyethyl starch.
Claim 2
Independent Claim
95 words
A method for preparing a water-containing vinyl acetate polymer dispersion, comprising adding vinyl acetate monomer and initiator to a water solution from an emulsifier and an amount, between 0.1 and 6 weight % from the monomer amount, of hydroxypropyl and/or hydroxyethyl starch, in which the emulsifier amount is equal to 0.8 to 2.3 weight % from the monomer amount, and the degree of substitution of the starch lies between 0.9 and 1.6 hydroxypropyl groups per anhydroglucose unit for the hydroxypropyl starch and between 0.9 and 2.7 hydroxyethyl groups per anhydroglucose unit for the hydroxyethyl starch.
Claim 3
Dependent Claim
41 words
A method as defined in claim 22, in which at least one other monomer belonging to the series of the unsaturated organic esters, acrylates, methacrylates, alkenes and vinyl derivatives is incorporated in the water phase together with said vinyl acetate monomer.
Claim 4
Dependent Claim
22 words
A method as defined in claim 1, in which said emulsifier is comprised of a mixture from anionic emulsifier and non-ionic emulsifier.
Claim 5
Dependent Claim
42 words
A method as defined in claim 3, in which the anionic emulsifier amount is equal to 0 to 2 weight % from the monomer amount and the non-ionic emulsifier amount is equal to 0.3 to 2.3 weight % from the monomer amount.
Claim 6
Dependent Claim
24 words
A method as defined in claim 1, in which the protective colloid amount is substantially equal to 1 weight % from the monomer amount.
References Cited (Backward Citations)
US3769248A
Cited
US3879365A
Cited
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 |