Patent US3899461A successfully refreshed from Google Patents.
US3899461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of an N-vinyl lactam and a branched chain aliphatic carboxylic acid ester
Assignee: ISP Investments LLC
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Filing: 1973-01-26
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Granted: 1975-08-12
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Expires: 1993-01-26
Abstract
Abstract There is disclosed a copolymer composition derived from monomeric units comprising (a) an N-vinyl lactam corresponding to the formula: wherein R represents a divalent alkylene bridge having sufficient carbon atoms to form a five, six or seven member heterocyclic ring system and R1 is a member selected from the group consisting of hydrogen and lower alkyl and (b) a branched chain aliphatic carboxylic acid ester corresponding to the formula: wherein R1, R2 and R3 are saturated alkyl groups. The polymers of the invention may be made into homogeneous solutions when the amount of (a) is 1:99% and the amount of (b) is 99:1% of the total weight of the polymer or suspensions; or they may be made as stable aqueous emulsions when the ratio of (a) and (b) is 10: 60% and 90:40%, respectively.
Inventors
- 👤 Eugene S Barabas
- 👤 Marvin M Fein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:43
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/10; C08F226/00; C08F226/06; C08F226/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
44 words
A COPOLYMER COMPOSITION, COMPRISING APPROXIMATELY, BY WEIGHT, (A) 1:99 PERCENT OF AN N-VINYL LACTAM SELECTED FROM THE GROUP CONSISTING OF N-VINYL-2-PYRROLIDONE, N-VINYL-2PIPERIDONE, N-VINYL-6-CAPROLACTAM, N-VINYL-5-METHYL-2-PYRROLIDONE, N-VINYL-3,3-DIMETHYL-2-PYRROLIDONE, N-VINYL-HEXAHYDROPHTHALAMIDINE, AND N-VINYL-ANPHTHOSTYRILE, AND (B) 99:1 PERCENT OF A BRANCHED CHAIN ALIPHATIC CARBOXYLIC ACID ESTER CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
44 words
A COPOLYMER COMPOSITION, COMPRISING APPROXIMATELY, BY WEIGHT, (A) 1:99 PERCENT OF AN N-VINYL LACTAM SELECTED FROM THE GROUP CONSISTING OF N-VINYL-2-PYRROLIDONE, N-VINYL-2PIPERIDONE, N-VINYL-6-CAPROLACTAM, N-VINYL-5-METHYL-2-PYRROLIDONE, N-VINYL-3,3-DIMETHYL-2-PYRROLIDONE, N-VINYL-HEXAHYDROPHTHALAMIDINE, AND N-VINYL-ANPHTHOSTYRILE, AND (B) 99:1 PERCENT OF A BRANCHED CHAIN ALIPHATIC CARBOXYLIC ACID ESTER CORRESPONDING TO THE FORMULA:
Claim 3
Dependent Claim
32 words
A copolymer as defined in claim 1 wherein said branched chain aliphatic carboxylic acid ester is selected from the group consisting of vinyl esters of 2,2-dimethylpropanoic acid, 2,2-dimethylhexanoic acid, and 2,2-dimethylpelargonic acid.
Claim 4
Dependent Claim
23 words
A copolymer as definded in claim 2 wherein said N-vinyl lactam is N-vinyl-2-pyrrolidone and said ester is the vinyl ester of 2,2-dimethylpropanoic acid.
Claim 5
Dependent Claim
21 words
A copolymer as defined in claim 1 containing 10 to 60% of component (a) and 40 to 90% of component (b).
Claim 6
Dependent Claim
14 words
A copolymer as defined in claim 1 wherein said N-vinyl lactam is N-vinyl pyrrolidone.
Claim 7
Dependent Claim
12 words
A stable aqueous emulsion containing the copolymer as defined in claim 1.
Claim 8
Dependent Claim
28 words
A process for producing a copolymer as defined in claim 1, comprising polymerizing components (a) and (b) in a reaction medium containing a free radical supplying polyermization catalyst.
Claim 9
Dependent Claim
15 words
A process as defined in claim 7, wherein said reaction medium is an organic solvent.
Claim 10
Dependent Claim
21 words
A process as defined in claim 7 wherein said polymerization is carried out at temperatures of about 30* to 150* C.
Claim 11
Dependent Claim
42 words
A process for producing a stable aqueous emulsion as defined in claim 6, comprising subjecting components (a) and (b) in aqueous reaction medium to polymerization conditions in the presence of a water soluble emulsifying agent and a free radical supplying polymerization catalyst.
Claim 12
Dependent Claim
14 words
A process as defined in claim 9 wherein said aqueous reaction medium is water.
Claim 13
Dependent Claim
36 words
A process for producing a copolymer as defined in claim 1 comprising carrying out the procedure as defined in claim 10 followed by the additional step of separating from the resulting emulsion the copolymer contained therein.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |