Patent US4296225A successfully refreshed from Google Patents.
US4296225A
Expired / Lapsed
US
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Stable vinyl acetate and amine monomer copolymer emulsions
Assignee: Celanese Corp
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Filing: 1980-01-04
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Granted: 1981-10-20
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Expires: 2000-01-04
Abstract
Abstract This invention provides a process for preparing a stable aqueous emulsion composition which has excellent properties for application as a wet abrasion-resistant paper coating binder. The dispersed copolymer of the aqueous emulsion composition comprises a major proportion of vinyl acetate and a minor proportion of an amino-containing vinyl monomer. An important aspect of the emulsion preparation method is the addition of an aqueous solution of the amino-containing vinyl monomer as a separate feedstream, wherein the amine group in the said vinyl monomer is in the form of an amine-acid salt.
Inventors
- 👤 David Rhum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:05
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/08; D21H19/52; Y; Y10; Y10S; Y10S526/00; Y10S526/922; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
A process for preparing a stable aqueous emulsion composition adapted for application as a wet abrasion-resistant paper coating binder which comprises simultaneously adding to an aqueous medium containing a vinyl polymerization catalyst a combination of copolymerizable monomer components comprising (1) between about 70-95 weight percent of vinyl acetate; (2) an aqueous solution of between about 0.5-10 weight percent of vinyl monomer containing an aliphatic amine-acid salt group; and (3) 0.5-20 weight percent of at least one other vinyl monomer, all based on total monomer weight; wherein the aqueous solution of amino-containing vinyl monomer is added as a separate feedstream.
Claim 2
Dependent Claim
99 words
A process for preparing a stable aqueous emulsion composition adapted for application as a wet abrasion-resistant paper coating binder which comprises simultaneously adding to an aqueous medium containing a vinyl polymerization catalyst a combination of copolymerizable monomer components comprising (1) between about 70-95 weight percent of vinyl acetate; (2) an aqueous solution of between about 0.5-10 weight percent of vinyl monomer containing an aliphatic amine-acid salt group; and (3) 0.5-20 weight percent of at least one other vinyl monomer, all based on total monomer weight; wherein the aqueous solution of amino-containing vinyl monomer is added as a separate feedstream.
Claim 3
Dependent Claim
22 words
A process in accordance with the process of claim 1 wherein the intrinsic viscosity of the formed copolymer is at least 1.0.
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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |