US4605702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temporary wet strength resin
Assignee: CYTEC
•
Filing: 1984-06-27
•
Granted: 1986-08-12
•
Expires: 2004-06-27
Abstract
Abstract A cationic, water-soluble acrylamide polymer containing an acrylamide, a cationic comonomer and, optionally, a second comonomer and having sufficient glyoxal-reactive amide substituents and -CHOHCHO substituents to be thermosetting, the polymer, before glyoxylation, having a molecular weight ranging from about 500 to about 6000, a process for imparting temporary wet strength to paper and the paper per se, are disclosed.
Inventors
- 👤 Gerald J. Guerro
- 👤 Robert J. Proverb
- 👤 Robert F. Tarvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:03
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; C; C08; C08F; C08F8/00; C08F8/28; D21H17/37; D21H17/375; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A glyoxylated cationic, water-soluble acrylamide polymer containing (a) from about 70-99%, by weight, of an acrylamide and (b) from about 1-30%, by weight, of a cationic monomer or mixture of cationic monomers copolymerizable with said acrylamide, up to about 10%, by weight, of said acrylamide being replaced by (c) a different comonomer than (b) copolymerizable with said acrylamide, the amount of said (c) being less than said (b) if said (c) is anionic, said acrylamide copolymer having a molecular weight ranging from about 500 to about 6000 before glyoxylation, and having sufficient glyoxal-reactive amide substituents and --CH 0 HCHO substituents to be thermosetting, the ratio of glyoxol units to acrylamide units ranging from about 0.1-0.5:1.0.
Claim 2
Dependent Claim
115 words
A glyoxylated cationic, water-soluble acrylamide polymer containing (a) from about 70-99%, by weight, of an acrylamide and (b) from about 1-30%, by weight, of a cationic monomer or mixture of cationic monomers copolymerizable with said acrylamide, up to about 10%, by weight, of said acrylamide being replaced by (c) a different comonomer than (b) copolymerizable with said acrylamide, the amount of said (c) being less than said (b) if said (c) is anionic, said acrylamide copolymer having a molecular weight ranging from about 500 to about 6000 before glyoxylation, and having sufficient glyoxal-reactive amide substituents and --CH 0 HCHO substituents to be thermosetting, the ratio of glyoxol units to acrylamide units ranging from about 0.1-0.5:1.0.
Claim 3
Dependent Claim
11 words
A polymer according to claim 1 wherein said acrylamide is acrylamide.
Claim 4
Dependent Claim
13 words
A polymer according to claim 1 wherein said cationic comonomer is diallyl-dimethylammonium chloride.
Claim 5
Dependent Claim
14 words
A polymer according to claim 1 wherein said cationic comonomer is methacrylamido-trimethyl ammonium chloride.
Claim 6
Dependent Claim
8 words
The polymer of claim 1 in colloidal state.
Claim 7
Dependent Claim
18 words
A polymer according to claim 1 wherein the molecular weight thereof ranges between about 1000 to about 4000.
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) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |