US3992333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly absorbent copolymers and foamed articles having rewettability made therefrom
Assignee: Rohm and Haas Co
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Filing: 1972-06-27
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Granted: 1976-11-16
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Expires: 1992-06-27
Abstract
Abstract The present invention is concerned with new and improved binders for the production of foamed or cellular articles which have a high degree of absorbency, and retain their bonded character as well as absorbency through numerous wash-dry cycles. The cellular articles are bonded by a novel self-cross-linking binder comprising a copolymer of (a) N-methylol-amine or -amide units, (b) sulfonic acid units which contain no basic nitrogen atoms or group, and (c) certain acrylic units of neutral but mildly hydrophilic character which contain no basic nitrogen atoms or group.
Inventors
- 👤 William D. Emmons
- 👤 Vincent J. Moser
- 👤 John G. Brodnyan
- 👤 Norman Shachat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:23
CPC Classifications
C; C08; C08J; C08J9/00; C08F; C08F246/00; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/285; D06M15/29; D06M15/356; D06M15/3566; C08J2357/00; C08J2357/04; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
As an article of manufacture an absorbent and readily wettable spone-like mass comprising a copolymer of a. 0.2 to 10% by weight of at least one α,β- monoethylenically unsaturated monomer containing an amino group in which the nitrogen atom is attached to a carbon atom of a 1,3,5-triazine ring, a carboxylamide group, or a ureido group, the nitrogen atom of such amino, carboxylamido, or ureido group being substituted by a methylol or methoxymethyl group, b. 0.2 to 15% by weight of at least one α,β-monoethylenically unsaturated monomer, in acid or salt form, having a sulfur-containing acid group and containing no basic nitrogen atom, and c. the balance to make 100% by weight, of at least one other α,β-monoethylenically monomer which contains no basic nitrogen atom.
Claim 2
Dependent Claim
125 words
As an article of manufacture an absorbent and readily wettable spone-like mass comprising a copolymer of a. 0.2 to 10% by weight of at least one α,β- monoethylenically unsaturated monomer containing an amino group in which the nitrogen atom is attached to a carbon atom of a 1,3,5-triazine ring, a carboxylamide group, or a ureido group, the nitrogen atom of such amino, carboxylamido, or ureido group being substituted by a methylol or methoxymethyl group, b. 0.2 to 15% by weight of at least one α,β-monoethylenically unsaturated monomer, in acid or salt form, having a sulfur-containing acid group and containing no basic nitrogen atom, and c. the balance to make 100% by weight, of at least one other α,β-monoethylenically monomer which contains no basic nitrogen atom.
Claim 3
Dependent Claim
44 words
As an article of manufacture, an absorbent and readily wettable sponge-like mass comprising a copolymer according to claim 1 wherein the copolymer comprises from about 0.5-10% by weight of monomeric material (a) and from about 0.5 to 8% by weight of monomeric material (b).
Claim 4
Dependent Claim
46 words
As an article of manufacture, an absorbent and readily wettable sponge-like mass comprising a copolymer according to claim 2 wherein the copolymer comprises from about 0.5 to 4% by weight of monomeric material (a) and from about 0.5 to 8% by weight of monomeric material (b).
Claim 5
Dependent Claim
12 words
An article according to claim 3 wherein the mass contains intercommunicating cells.
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) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |