US3876596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion copolymerization of monoolefinically unsaturated carboxylic acid esters
Assignee: BASF SE
•
Filing: 1973-11-13
•
Granted: 1975-04-08
•
Expires: 1993-11-13
Abstract
Abstract In the manufacture of aqueous dispersions of polymers of monoolefinically unsaturated carboxylic acid esters by emulsion copolymerization, polymerization is effected in the presence of a mixture of (a) non-ionic emulsifiers, (b) anionic emulsifiers, (c) a protective colloid based on an N-vinyl pyrrolidone polymer and (d) a hydroxyl-containing protective colloid.
Inventors
- 👤 Heinrich Grubert
- 👤 Wolfgang Druschke
- 👤 Wolfgang Sliwka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:51
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F20/00; C08F20/02; C08F20/10; C08F20/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
IN A PROCESS FOR THE MANUFACTURE OF AN AQUEOUS DISPERSION OF A COPOLYMER OF OLEFINICALLY UNSATURATED MONOMERS OF WHICH AT LEAST 40% CONSIST OF A MONOOLEFINICALLY UNSATURATED CARBOXYLIC ACID ESTER BY THE EMULSION COPOLYMERIZATION OF SAID MONOMERS DISPERSED IN WATER, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID EMULSION COPOLYMERIZATION IN AN EMULSIFIER/PROTECTIVE COLLOID SYSTEM CONSISTING ESSENTIALLY OF A. FROM 0.5 TO 7% OF A NON-IONIC EMULSIFIER, B. FROM 0.05 TO 5% OF AN ANIONIC EMULSIFIER, C. FROM 0.01 TO 5% OF A PROTECTIVE COLLOID WHICH IS A POLYMER OF N-VINYLPYRROLIDONE CONTAINING AT LEAST 20% BY WEIGHT OF POLYMERIZED UNITS VINYL PYRROLIDONE, AND D. FROM 0.01 TO 7% OF A HYDROXYL-CONTAINING PROTECTIVE COLLOID SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOLS, WATER-SOLUBLE AND PARTIALLY SAPONIFIED VINYL ACETATE POLYMERS, CARBOXYMETHYL CELLULOSES AND AND HYDROXYETHYL CELLULOSES, SAID PERCENTAGES OF SAID EMULSIFIERS (A) AND (B) AND SAID PROTECTIVE COLLOIDS (C) AND (D) BEING BY WEIGHT OF THE TOTAL WEIGHT OF MONOMERS.
Claim 2
Dependent Claim
157 words
IN A PROCESS FOR THE MANUFACTURE OF AN AQUEOUS DISPERSION OF A COPOLYMER OF OLEFINICALLY UNSATURATED MONOMERS OF WHICH AT LEAST 40% CONSIST OF A MONOOLEFINICALLY UNSATURATED CARBOXYLIC ACID ESTER BY THE EMULSION COPOLYMERIZATION OF SAID MONOMERS DISPERSED IN WATER, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID EMULSION COPOLYMERIZATION IN AN EMULSIFIER/PROTECTIVE COLLOID SYSTEM CONSISTING ESSENTIALLY OF A. FROM 0.5 TO 7% OF A NON-IONIC EMULSIFIER, B. FROM 0.05 TO 5% OF AN ANIONIC EMULSIFIER, C. FROM 0.01 TO 5% OF A PROTECTIVE COLLOID WHICH IS A POLYMER OF N-VINYLPYRROLIDONE CONTAINING AT LEAST 20% BY WEIGHT OF POLYMERIZED UNITS VINYL PYRROLIDONE, AND D. FROM 0.01 TO 7% OF A HYDROXYL-CONTAINING PROTECTIVE COLLOID SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOLS, WATER-SOLUBLE AND PARTIALLY SAPONIFIED VINYL ACETATE POLYMERS, CARBOXYMETHYL CELLULOSES AND AND HYDROXYETHYL CELLULOSES, SAID PERCENTAGES OF SAID EMULSIFIERS (A) AND (B) AND SAID PROTECTIVE COLLOIDS (C) AND (D) BEING BY WEIGHT OF THE TOTAL WEIGHT OF MONOMERS.
Claim 3
Dependent Claim
28 words
A process as claimed in claim 1 wherein the protective colloid components (c) and (d) consist of at least 30% of their weight of polymerized units of N-vinylpyrrolidone.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 1 wherein the monomers being copolymerized contain from 50 to 99% by weight of said monoolefinically unsaturated carboxylic acid ester.
Claim 5
Dependent Claim
46 words
A process as claimed in claim 3 wherein said monoolefinically unsaturated carboxylic acid ester contains from 3 to 20 carbon atoms and is selected from the group consisting of vinyl esters of a saturated carboxylic acid and the acrylic and methacrylic acid esters of C.sub.1-18 alkanols.
Claim 6
Dependent Claim
46 words
A process as claimed in claim 1 wherein the monomers being polymerized include from 0.5 to 15% by weight of total monomer of an unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid and itaconic acid.
Claim 7
Dependent Claim
36 words
A process as claimed in claim 1 wherein the nonionic emulsifier (a) is an ethoxylated compound selected from the group consisting of fatty alcohols, fatty amines, fatty acid amides and monoalkyl phenols containing C.sub.8-12 alkyl groups.
Claim 8
Dependent Claim
43 words
A process as claimed in claim 1 wherein the anionic emulsifier (b) is selected from the group consisting of sulfuric acid esters of fatty alcohols, sulfonation products of ethoxylated alkyl phenols containing C.sub.8-12 alkyl groups and water-soluble alkali metal salts of fatty acids.
Claim 9
Dependent Claim
33 words
A process as claimed in claim 1 wherein component (c) is an N-vinylpyrrolidone polymer having a K-value of 30 to 150 and containing 40 to 100% by weight of polymerized units of vinylpyrrolidone.
Claim 10
Dependent Claim
31 words
A process as claimed in claim 1 wherein the emulsion copolymerization is carried out at a temperature of about 40.degree.C. to 90.degree.C. and at a pH of about 2.5 to 7.
References Cited (Backward Citations)
US3218302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |