US3854866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recurable crosslinked cellulose fabrics from methylol reagents and polycarboxylic acids and method of making
Assignee: United States Department of Agriculture
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Filing: 1972-10-16
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Granted: 1974-12-17
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Expires: 1992-10-16
Abstract
Abstract Cellulosic fabrics are treated with formulations containing methylol crosslinking reagents and polycarboxylic acids having three or more acidic groups per molecule. The treated fabrics are cured in a flat configuration and washed. The fabric is subsequently heated in a folded configuration whereby the folded or creased configuration is permanently imparted to the fabric. A metal salt activating catalyst included in the formulation of the textile treating solution decreases the time required to form sharp, permanent creases in the cured fabrics.
Inventors
- 👤 W Franklin
- 👤 S Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:58
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
AN IMPROVEMENT IN THE PROCESS OF IMPREGNATING A CELLULOSIC TEXTILE WITH A SOLUTION OF A METHYLOLATED CELLULOSE CROSSLINKING REAGENT AND A POLYCARBOXYLIC ACID HAVING AT LEAST THREE CARBOXYLIC ACID GROUPS, CURING THE TEXTILE AND THERMALLY REFORMING THE CURED TEXTILE, THE IMPROVEMENT COMPRISING INCLUDING FROM ABOUT 0.25 TO 1.0 WEIGHT PERCENT OF A LATENT ACID CATALYST IN SAID SOLUTION.
Claim 2
Dependent Claim
58 words
AN IMPROVEMENT IN THE PROCESS OF IMPREGNATING A CELLULOSIC TEXTILE WITH A SOLUTION OF A METHYLOLATED CELLULOSE CROSSLINKING REAGENT AND A POLYCARBOXYLIC ACID HAVING AT LEAST THREE CARBOXYLIC ACID GROUPS, CURING THE TEXTILE AND THERMALLY REFORMING THE CURED TEXTILE, THE IMPROVEMENT COMPRISING INCLUDING FROM ABOUT 0.25 TO 1.0 WEIGHT PERCENT OF A LATENT ACID CATALYST IN SAID SOLUTION.
Claim 3
Dependent Claim
115 words
A process for thermally reforming a resilient, smmoth-drying crosslinked cellulosic textile subsequent to the crosslinking treatment, which process consists of the following steps: a. impregnating the cellulosic textile with a methylolated crosslinking reagent augmented with from 1-6 weight percent of a polycarboxylic acid having at least three carboxylic acid groups and from 0.25 to 1.0 weight percnt of a latent acid catalyst; b. curing the impregnated cellulosic textile at a temperature not exceeding 160*C. to produce a resilient, smooth-drying crosslinked cellulosic textile, and c. at any time subsequent to the cure, thermally reforming, with constraint, the said crosslinked cellulosic textile at a temperature of about 160*C. for a time interval of at least 15 seconds.
Claim 4
Dependent Claim
115 words
A process for thermally reforming a resilient, smmoth-drying crosslinked cellulosic textile subsequent to the crosslinking treatment, which process consists of the following steps: a. impregnating the cellulosic textile with a methylolated crosslinking reagent augmented with from 1-6 weight percent of a polycarboxylic acid having at least three carboxylic acid groups and from 0.25 to 1.0 weight percnt of a latent acid catalyst; b. curing the impregnated cellulosic textile at a temperature not exceeding 160*C. to produce a resilient, smooth-drying crosslinked cellulosic textile, and c. at any time subsequent to the cure, thermally reforming, with constraint, the said crosslinked cellulosic textile at a temperature of about 160*C. for a time interval of at least 15 seconds.
Claim 5
Dependent Claim
17 words
The initially crosslinked and subsequently thermally reformed cellulosic textile produced according to the process of claim 2.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |