US3983269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Durable press composition and process
Assignee: Individual
•
Filing: 1974-09-30
•
Granted: 1976-09-28
•
Expires: 1994-09-30
Abstract
Abstract Durable crease and wrinkle resistance properties are permanently imparted to fabrics and garments by treating the same with a novel composition prepared by reacting a urea with a condensation product of an aldehyde, an amine and phosphoric acid under curing conditions.
Inventors
- 👤 Glenn A. Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:25
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2369; Y10T442/2393
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A method for treating textiles to impart permanent press characteristics thereto which comprises treating the textile with an acidic resinous solution prepared by forming the reaction product of (a) a condensation product prepared by reacting 40-60 parts by weight of an aldehyde, 2-8 parts by weight of a polyalkylol amine and 3-7 parts by weight of a strong inorganic acid, then adding to the condensation product 15-35 parts by weight of a urea, the resinous solution being a stable solution having an acid pH, and thereafter, drying and curing the treated textile.
Claim 2
Independent Claim
92 words
A method for treating textiles to impart permanent press characteristics thereto which comprises treating the textile with an acidic resinous solution prepared by forming the reaction product of (a) a condensation product prepared by reacting 40-60 parts by weight of an aldehyde, 2-8 parts by weight of a polyalkylol amine and 3-7 parts by weight of a strong inorganic acid, then adding to the condensation product 15-35 parts by weight of a urea, the resinous solution being a stable solution having an acid pH, and thereafter, drying and curing the treated textile.
Claim 3
Dependent Claim
32 words
A method according to claim 1 wherein the condensation product is prepared by reacting formaldehyde or a compound acting as an aldehyde, phosphoric acid and a polyalkylolamine by mixing at room temperature.
Claim 4
Dependent Claim
35 words
A method according to claim 2 wherein the condensation product is prepared by thorough mixing of the reactants at room temperature and then raising the pH of the resulting mixture to about 4.5 to 5.5.
Claim 5
Dependent Claim
25 words
A method according to claim 3 wherein the condensation product is allowed to stand for one day to two weeks before reacting with the urea.
Claim 6
Dependent Claim
78 words
A method according to claim 4 wherein the urea is selected from the group consisting of urea, thiourea, ethylene urea, dimethylol ethylene urea, dimethylol propylene urea, dimethylol dihydroxy ethylene urea, or mixtures thereof; the aldehyde is selected from the group consisting of formaldehyde, acetaldehyde, paraldehyde, glyoxal, or mixtures thereof; the amine is a polyolamine selected from the group consisting of triethanolamine, diethanolamine and mixtures thereof; and the inorganic acid is phosphoric acid, an ammonium salt thereof, or mixtures.
Claim 7
Dependent Claim
22 words
A method according to claim 5 wherein the textile is a fabric or garment and is pressed and creased prior to curing.
Claim 8
Dependent Claim
17 words
A method according to claim 6 wherein the textile is cotton, a cotton-synthetic blend or 100% synthetics.
Claim 9
Dependent Claim
94 words
A method according to claim 7 wherein the condensation product is prepared by mixing about 2500 parts of 37% aqueous formaldehyde, about 230 parts 85% phosphoric acid, and about 280 parts 98% triethanolamine, raising the pH of the resulting mixture to 5.5 by the addition of a buffer; thoroughly reacting the resulting mixture with 25% of the weight of the condensation product of urea, allowing the mixture to stand until reaction is completed, adding three times the total weight of water, and then adding softeners, wetting agents and 4 weight percent of polyvinyl acetate.
Claim 10
Dependent Claim
19 words
A method according to claim 1 wherein 4-5 weight percent of polyvinyl acetate is added to the final mixture.
References Cited (Backward Citations)
US2626251A
Cited
US3883462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |