US4595737A
Expired / Lapsed
US
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Water-soluble terpolymers and their preparation
Assignee: BASF SE
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Filing: 1985-06-26
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Granted: 1986-06-17
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Expires: 2005-06-26
Abstract
Abstract Water-soluble terpolymers which contain, as copolymerized units, (a) from 10 to 35% by weight of an N-vinyllactam or an N-vinyl acid amide, (b) from 5 to 20% by weight of acrylic acid or of a salt of acrylic acid and (c) from 80 to 50% by weight of a C 1 -C 4 -alkyl vinyl ether, and have a glass transition temperature T g below 60° C. can be prepared by polymerizing the monomer mixture in an inert organic solvent in the presence of a polymerization initiator and can, where appropriate, be partially or completely neutralized with a base, so as to form a salt. The products may be used as raw materials for adhesives or, in the form of an aqueous solution, as the adhesive itself.
Inventors
- 👤 Ferdinand Straub
- 👤 Oral Aydin
- 👤 Wolfgang Linke
- 👤 Gerd Schroeder
- 👤 Peter Fickeisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
C; C09; C09J; C09J129/00; C09J129/10; C08; C08F; C08F216/00; C08F216/12; C08F216/14; C08F216/16; C08F216/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
69 words
A water-soluble terpolymer which contains, as copolymerized units, (a) from 10 to 35% by weight of an N-vinyllactam or an N-vinyl acid amide, (b) from 5 to 20% by weight of acrylic acid or of a salt of acrylic acid and (c) from 80 to 50% by weight of a C 1 -C 4 -alkyl vinyl ether, and which has a glass transition temperature T g below 60° C.
Claim 2
Dependent Claim
69 words
A water-soluble terpolymer which contains, as copolymerized units, (a) from 10 to 35% by weight of an N-vinyllactam or an N-vinyl acid amide, (b) from 5 to 20% by weight of acrylic acid or of a salt of acrylic acid and (c) from 80 to 50% by weight of a C 1 -C 4 -alkyl vinyl ether, and which has a glass transition temperature T g below 60° C.
Claim 3
Dependent Claim
13 words
The water-soluble terpolymer of claim 1, wherein said N-vinyllactam is N-vinylpyrrolidone or N-vinylcaprolactam.
Claim 4
Dependent Claim
34 words
The water soluble terpolymer of claim 1, wherein said N-vinylacidamide is a compound of the formula: ##STR2## wherein R is hydrogen or C 1 -C 4 -alkyl and x is from 0 to 3.
Claim 5
Dependent Claim
14 words
The water-soluble terpolymer of claim 3, wherein said N-vinylacidamide is N-vinylformamide, N-vinyl-N-methylformamide or N-vinylacetamide.
Claim 6
Dependent Claim
23 words
The water-soluble terpolymer of claim 1, wherein said acrylic acid component is present in the terpolymer in an amount of 10-15% by weight.
Claim 7
Dependent Claim
26 words
The water-soluble terpolymer of claim 1, wherein said C 1 -C 4 alkylvinyl ether is vinylmethyl ether, vinylethyl ether, vinyl-n-propyl ether, vinylisopropyl ether or vinylbutyl ether.
Claim 8
Dependent Claim
65 words
A process for the preparation of a watersoluble terpolymer, comprising: copolymerizing (i) from 10 to 35% by weight of an N-vinyllactam or an N-vinyl acid amide, (ii) from 5 to 20% by weight of acrylic acid and (iii) from 80 to 50% by weight of a C 1 -C 4 -alkyl vinyl ether, in an inert organic solvent in the presence of a polymerization initiator.
Claim 9
Dependent Claim
65 words
A process for the preparation of a watersoluble terpolymer, comprising: copolymerizing (i) from 10 to 35% by weight of an N-vinyllactam or an N-vinyl acid amide, (ii) from 5 to 20% by weight of acrylic acid and (iii) from 80 to 50% by weight of a C 1 -C 4 -alkyl vinyl ether, in an inert organic solvent in the presence of a polymerization initiator.
Claim 10
Dependent Claim
27 words
The process of claim 7, which further comprises: partially or completely neutralizing the terpolymer product with a base in order to form a salt of said terpolymer.
Claim 11
Dependent Claim
22 words
The process of claim 7, wherein said solvent is a monohydric saturated C 1 -C 4 -alcohol, tetrahydrofuran, dioxane or mixture thereof.
Claim 12
Dependent Claim
52 words
The process of claim 7, which comprises: polymerizing said monomers in a solution of an ester of a saturated C 1 -C 4 -carboxylic acid and a monohydric C 1 -C 8 -alcohol, an ether, ketone or a chlorohydrocarbon, with the result that the terpolymer product precipitates from solution as it forms.
Claim 13
Dependent Claim
18 words
The process of claim 7, wherein the water content of the solvent is less than 1% by weight.
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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) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |