US4239671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersions of hydrophilic acrylic resins
Assignee: Roehm GmbH Darmstadt
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Filing: 1979-03-13
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Granted: 1980-12-16
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Expires: 1999-03-13
Abstract
Abstract Aqueous dispersions of copolymers of (1) acrylic or methacrylic acid esters, (2) derivatives of acrylic acid or methacrylic acid having the general formula ##STR1## wherein Y is oxygen or a --NR"-- group where R" is hydrogen or alkyl having 1-4 carbon atoms, R is hydrogen or methyl, R' is hydrogen or alkyl having 1-4 carbon atoms, and n is an integer from 1 to 25, (3) one or more polymerizable carboxylic acids and/or the salts thereof, and (4) one or more monomers capable of crosslinking the polymer chains. These copolymers are highly water absorbent, and alkali-resistant, and applied as dispersions are well suited for providing a hydrophilic finish to textile fibers and to textiles and non-wovens.
Inventors
- 👤 Herbert Fink
- 👤 Klaus Huebner
- 👤 Horst Dinklage
- 👤 Hans Ottofrickenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:01
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F220/28; C08F220/282; C08F220/285; C08F220/286
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
An aqueous dispersion of a hydrophilic copolymer prepared by polymerizing, in an aqueous medium, a monomer mixture comprising: (1) a member selected from the group consisting of lower alkyl acrylates and methacrylates; (2) a compound of the formula ##STR5## wherein R is hydrogen or methyl, R 1 is hydrogen or alkyl having 1 to 4 carbon atoms, Y is oxygen or --NR 2 --, R 2 is hydrogen or alkyl having 1 to 4 carbon atoms, and n is an integer from 1 to 25; (3) up to 8 percent, by weight of the copolymer, of a member selected from the group consisting of copolymerizable carboxylic acids and salts of such acids; and (4) a mixture of monomers capable of cross-linking said copolymer, said mixture consisting of 1 to 1.5 percent of N-methylol-methacrylamide and 0.5-1 percent of methacrylamide, said percentages being by weight of said copolymer.
Claim 2
Dependent Claim
146 words
An aqueous dispersion of a hydrophilic copolymer prepared by polymerizing, in an aqueous medium, a monomer mixture comprising: (1) a member selected from the group consisting of lower alkyl acrylates and methacrylates; (2) a compound of the formula ##STR5## wherein R is hydrogen or methyl, R 1 is hydrogen or alkyl having 1 to 4 carbon atoms, Y is oxygen or --NR 2 --, R 2 is hydrogen or alkyl having 1 to 4 carbon atoms, and n is an integer from 1 to 25; (3) up to 8 percent, by weight of the copolymer, of a member selected from the group consisting of copolymerizable carboxylic acids and salts of such acids; and (4) a mixture of monomers capable of cross-linking said copolymer, said mixture consisting of 1 to 1.5 percent of N-methylol-methacrylamide and 0.5-1 percent of methacrylamide, said percentages being by weight of said copolymer.
Claim 3
Dependent Claim
29 words
A dispersion as in claim 1 wherein said copolymerizable carboxylic acids and salts (3) are present in an amount from 2 to 7.5 percent by weight of said copolymer.
Claim 4
Dependent Claim
25 words
A dispersion as in claim 1 wherein said compound (2) is present in an amount from 5 to 25 percent by weight of said copolymer.
Claim 5
Dependent Claim
28 words
A dispersion as in claim 1 wherein said lower alkyl acrylates and methacrylates are present in an amount from 65 to 94.5 percent by weight of said copolymer.
Claim 6
Dependent Claim
68 words
A dispersion as in claim 1 wherein said monomer mixture comprises 76 to 80 percent of ethyl acrylate, 10 to 20 percent of ethylene glycol monoacrylate, 2 to 7.5 percent of a member selected from the group consisting of copolymerizable carboxylic acid and salts thereof, and 0.5 to 5 percent of at least one monomer capable of cross-linking said copolymer, all percentages being by weight of said copolymer.
Claim 7
Dependent Claim
19 words
A dispersion as in claim 5 wherein said ethylene glycol monoacrylate is 15 percent by weight of said copolymer.
Claim 8
Dependent Claim
30 words
A dispersion as in claim 5 wherein said copolymerizable carboxylic acid or salt thereof is itaconic acid or a salt thereof present as 5 percent by weight of said copolymer.
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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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |