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US3979178A
Expired / Lapsed
US
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Finishing of cellulose fabrics with N-methylol amide crosslinking agents, magnesium sulfate and sulfuric acid
Assignee: United States Department of Agriculture
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Filing: 1974-10-09
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Granted: 1976-09-07
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Expires: 1994-10-09
Abstract
Abstract Improvement in the strength of fabric finished for durable press properties with an N-methylol amide cross-linking agent and sulfuric acid catalyst is obtained by inclusion of magnesium sulfate in the finishing formulation.
Inventors
- 👤 Robert M. Reinhardt
- 👤 Russell M. H. Kullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:36
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
In a process of finishing cellulose-containing fabrics to impart durable press properties by treatment with aqueous formulations containing N-methylol amide crosslinking agents, crosslinking catalysts, and, other compatible additives or agents to enhance properties other than durable press or strengh properties, the improvement consisting of: a. adding to aqueous formulations as the sole crosslinking catalyst, a mixture of sulfuric acid and magnesium sulfate in amounts such that for every 100 parts by weight of said formulation there are about from 5 to 20 parts by weight N-methylol amide crosslinking agent, about from 0.2 to 2 parts by weight of sulfuric acid, and about from 0.3 to 2.5 parts by weight of magnesium sulfate; b. impregnating a cellulose-containing textile with the formulation from a; and Serial No. 513,361 c. curing the wet, impregnated textile by heat treatment at from about 60°C to about 100°C for about from 2 minutes to about 8 minutes to obtain a moisture content in the treated textile of about 2 to 5%; and d. washing and drying the textile.
Claim 2
Dependent Claim
172 words
In a process of finishing cellulose-containing fabrics to impart durable press properties by treatment with aqueous formulations containing N-methylol amide crosslinking agents, crosslinking catalysts, and, other compatible additives or agents to enhance properties other than durable press or strengh properties, the improvement consisting of: a. adding to aqueous formulations as the sole crosslinking catalyst, a mixture of sulfuric acid and magnesium sulfate in amounts such that for every 100 parts by weight of said formulation there are about from 5 to 20 parts by weight N-methylol amide crosslinking agent, about from 0.2 to 2 parts by weight of sulfuric acid, and about from 0.3 to 2.5 parts by weight of magnesium sulfate; b. impregnating a cellulose-containing textile with the formulation from a; and Serial No. 513,361 c. curing the wet, impregnated textile by heat treatment at from about 60°C to about 100°C for about from 2 minutes to about 8 minutes to obtain a moisture content in the treated textile of about 2 to 5%; and d. washing and drying the textile.
Claim 3
Dependent Claim
180 words
In a process of finishing cellulose-containing fabrics to impart durable press properties by treatment with aqueous formulations containing an N-methylol amide crosslinking agent selected from the group consisting of dimethylol dihydroxyethyleneurea and dimethylol methyl carbamate, crosslinking catalysts, and, other compatible additives or agents to enhance properties other than durable press or strength properties, the improvement consisting of: a. adding to aqueous formulations as the sole crosslinking catalyst a mixture of sulfuric acid and magnesium sulfate in amounts such that for every 100 parts by weight of said formulation there are about from 9 to 15 parts by weight of the N-methylol amide crosslinking agent, about from 0.5 to 1.5 parts by weight sulfuric acid, and about from 0.6 to 1.8 parts by weight of magnesium sulfate; b. impregnating the cellulose-containing textile with said formulation; c. curing the wet, impregnated textile by heat treatment at from about 60°C to about 100°C for about from 2 minutes to about 8 minutes to obtain a moisture content in the treated textile of about 2 to 5%; and d. washing and drying the textile.
Claim 4
Dependent Claim
180 words
In a process of finishing cellulose-containing fabrics to impart durable press properties by treatment with aqueous formulations containing an N-methylol amide crosslinking agent selected from the group consisting of dimethylol dihydroxyethyleneurea and dimethylol methyl carbamate, crosslinking catalysts, and, other compatible additives or agents to enhance properties other than durable press or strength properties, the improvement consisting of: a. adding to aqueous formulations as the sole crosslinking catalyst a mixture of sulfuric acid and magnesium sulfate in amounts such that for every 100 parts by weight of said formulation there are about from 9 to 15 parts by weight of the N-methylol amide crosslinking agent, about from 0.5 to 1.5 parts by weight sulfuric acid, and about from 0.6 to 1.8 parts by weight of magnesium sulfate; b. impregnating the cellulose-containing textile with said formulation; c. curing the wet, impregnated textile by heat treatment at from about 60°C to about 100°C for about from 2 minutes to about 8 minutes to obtain a moisture content in the treated textile of about 2 to 5%; and d. washing and drying the textile.
Claim 5
Dependent Claim
14 words
The process of claim 2 wherein the N-methylol amide crosslinking agent is dimethylol dihydroxyethyleneurea.
Claim 6
Dependent Claim
15 words
The process of claim 2 wherein the N-methylol amide crosslinking agent is dimethylol methyl carbamate.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |