US4304564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrinkle-resistant and durable-press cotton-containing fabric by treatment with acrylamide and glyoxal
Assignee: United States Department of Agriculture
•
Filing: 1980-05-05
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Granted: 1981-12-08
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Expires: 2000-05-05
Abstract
Abstract Cotton, or other fabric containing cellulose, is treated with acrylamide and a chemical initiator that promotes reaction of acrylamide with cellulose. The fabric, with bound acrylamide, is then treated with glyoxal and an acidic, metal salt catalyst to produce a fabric containing crosslinked cellulose. Thus, the fabric is given wrinkle resistance and durable-press properties by the treatment without using formaldehyde, free or combined, that could be released during treatment or from the treated fabric.
Inventors
- 👤 John G. Frick, Jr.
- 👤 Robert J. Harper, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:36
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/02; D06M14/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A process for imparting increased wrinkling resistance to fabric without the use of materials made from formaldehyde comprising in combination: (a) padding an unsaturated amide to fabric with a chemical initiator said chemical initiator selected from the group consisting of about 1% sodium carbonate or 0.01-0.10% ammonium persulfate; (b) heating the prepared fabric for about 3-5 minutes at 120°-160° C. to promote reaction of the unsaturated amide with cellulose in the fabric; (c) then, applying glyoxal to the fabric with an acidic catalyst; (d) heating the fabric to cause reaction of the glyoxal with amide groups under the influence of the catalyst.
Claim 2
Dependent Claim
102 words
A process for imparting increased wrinkling resistance to fabric without the use of materials made from formaldehyde comprising in combination: (a) padding an unsaturated amide to fabric with a chemical initiator said chemical initiator selected from the group consisting of about 1% sodium carbonate or 0.01-0.10% ammonium persulfate; (b) heating the prepared fabric for about 3-5 minutes at 120°-160° C. to promote reaction of the unsaturated amide with cellulose in the fabric; (c) then, applying glyoxal to the fabric with an acidic catalyst; (d) heating the fabric to cause reaction of the glyoxal with amide groups under the influence of the catalyst.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the unsaturated amide applied to the fabric is selected from the group consisting of acrylamide, methacrylamide, and contronamide.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the acidic catalyst is selected from the group consisting of zinc nitrate, zinc fluoborate, ammonium chloride and magnesium chloride.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the unsaturated amide is applied to the fabric with the chemical initiator by padding.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein the glyoxal is 5-10%.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein the heating of step (d) is at 150°-160° for 2-5 minutes.
Claim 8
Dependent Claim
18 words
The process of claim 2 wherein the unsaturated amide is from an aqueous solution containing about 5-20% acrylamide.
Claim 9
Dependent Claim
15 words
The process of claim 3 wherein the catalyst is magnesium chloride of about 1.5-2.0% concentration.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein ammonium persulfate is present in amounts of 0.02-0.03%.
References Cited (Backward Citations)
US2412832A
Cited
US3102773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |