US3577554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-curing latex foam compositions
Assignee: Dow Chemical Co
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Filing: 1967-05-24
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Granted: 1971-05-04
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Expires: 1987-05-24
Abstract
Abstract A THIN-FORMING LATEX OF A COPOLYMER OF AN A, B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID, SUCH AS AN ACRYLIC ACID, AND A COPOLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER IS REACTED WITH AN AZIRIDINE AT A PH BELOW ABOUT 5 TO FORM A COPOLYMER HAVING AMINOESTER GROUPS AND CARBOXYL GROUPS AND THE PH THEN IS ADJUSTED TO ABOVE 7. THE RESULTING STABLE LATEX, OPTIONALLY CONTAINING FORMULATING INGREDIENTS, IS FROTHED, DRIED AND CURED TO OBTAIN A LATEX FOAM. OFTEN THE FROTHED COMPOSITION IS APPLIED IN THE WET STATE TO AN ADHERENT SUBSTRATE, E.G., TO A TEXTILE, THEN CURED AND DRIED TO FORM AN ARTICLE SUCH AS A DRAPERY.
Inventors
- 👤 Donald B Parrish
- 👤 James M Mcduff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:33
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |