US3632297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for rendering cellulose-containing fabrics durably flame-retardant by wet-curing a melamine resin and a phosphoric acid amide on the fabric
Assignee: JP Stevens and Co Inc
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Filing: 1970-03-12
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Granted: 1972-01-04
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Expires: 1990-03-12
Abstract
Abstract Cellulose-containing fabrics are rendered durably flameretardant by coreacting on said fabric A. A MELAMINE DERIVATIVE PREPARED BY REACTING A MELAMINE WITH FORMALDEHYDE OR FORMALDEHYDE AND AN ALKANOL, AND B. A PHOSPHORIC AMIDE. During said coreaction the moisture content of said fabric is maintained at a minimum of 10 percent by weight based on the weight of the fabric. By this procedure durable flame-retardancy is obtained without undue deterioration of the mechanical strength and hand of the fabric.
Inventors
- 👤 Stephen B Sello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:21
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/433
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
A process as claimed in claim 1 wherein said catalyst is selected from the group consisting of ammonium peroxydisulfate, potassium peroxydisulfate, hydrogen peroxide, magnesium chloride, zinc nitrate, and the hydrochloride of 2-amino-2-methyl-1-propanol.
Claim 2
Dependent Claim
28 words
A process as claimed in claim 1 wherein the amount of catalyst is equal to about 0.5 to 12 percent by weight of the total weight of coreactants.
Claim 3
Dependent Claim
24 words
A process as claimed in claim 1 wherein about 0.1 to 3 moles of phosphoric amide are employed for each mole of melamine derivative.
Claim 4
Dependent Claim
54 words
A process as claimed in claim 1 wherein said insoluble product contains an amount of phosphorus equal to about 0.5 to 4 percent by weight of the total weight of the treated fabric and an amount of nitrogen equal to about 1.0 to 15 percent by weight of the total weight of treated fabric.
Claim 5
Dependent Claim
13 words
A process as claimed in claim 1 wherein said melamine derivative is trimethylolmelamine.
Claim 6
Dependent Claim
31 words
A process as claimed in claim 1 wherein the phosphoric amide is selected from the group consisting of phosphoric triamide, N, N'',N''''-trimethylphosphoric triamide, phosphorodiamidic acid, N, N'',N''''-tris(hydroxymethyl)-N,N'',N''''-trimethylphosphoric triamide and N,N'',N''''-triethyl-N,N'',N''''-tris(hydroxymethyl)phosphoric triamide.
Claim 7
Dependent Claim
18 words
A process as claimed in claim 1 wherein said coreaction is carried out in the presence of steam.
Claim 8
Dependent Claim
212 words
A process for treating cellulose-containing fabric to render said fabric flame-retardant, said process comprising impregnating said fabric with a. a melamine derivative prepared by reacting melamine with either formaldehyde or formaldehyde and methanol, said melamine derivative having attached to its nitrogen atoms from 2 to 6 substituents of the formula -CH2OZ wherein Z is hydrogen or -CH3 b. a phosphoric amide of the formula OP(NRR'')a(OH)3 a wherein a is an integer of from 1 to 3 and R and R'' at each occurrence are independently selected from the group consisting of hydrogen, methyl, ethyl, hydroxymethyl and methoxymethyl provided that at least one of hydrogen, hydroxymethyl or methoxymethyl must be attached to each nitrogen atom and, c. a catalyst which is an acid, acid forming salt or oxidizing agent and coreacting said melamine derivative and said phosphoric amide to form an insoluble product while maintaining the moisture content of said fabric at a minimum of 10 percent by weight based on the weight of said fabric, said insoluble product containing an amount of phosphorus equal to about 0.5 to 4 percent by weight of the total weight of the treated fabric and an amount of nitrogen equal to about 1.0 to 15 percent by weight of the total weight of the treated fabric.
Claim 9
Dependent Claim
28 words
A process as claimed in claim 9 wherein the amount of catalyst is equal to about 0.5 to 12 percent by weight of the total weight of coreactants.
Claim 10
Dependent Claim
24 words
A process as claimed in claim 9 wherein about 0.1 to 3 moles of phosphoric amide are employed for each mole of melamine derivative.
Claim 11
Dependent Claim
24 words
A process as claimed in claim 9 wherein about 0.3 to 1.2 moles of phosphoric amide are employed for each mole of melamine derivative.
Claim 12
Dependent Claim
13 words
A process as claimed in claim 9 wherein said melamine derivative is trimethylolmelamine.
Claim 13
Dependent Claim
18 words
A process as claimed in claim 9 wherein said coreaction is carried out in the presence of steam.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |