US4020262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying phosphoramide-hydroxymethyl phosphine condensation products for textile fire retardation
Assignee: Leblanc Research Corp
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Filing: 1975-02-24
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Granted: 1977-04-26
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Expires: 1995-02-24
Abstract
Abstract A water soluble product suitable for rendering textile materials flame retardant is produced by condensing (a) at least one hydroxymethyl phosphorus compound selected from the group consisting of (CH.sub.2 OH).sub.4 P--Y and (CH.sub.2 OH).sub.3 P with (b) about 0.33 to 3 times the molar amount of at least one substituted phosphoramide of the formula PO(NR.sup.1 CH.sub.3)(NR.sup.2 CH.sub.3)(NR.sup.3 CH.sub.3) wherein R 1 and R 2 each independently is H or CH 2 OH, R 3 is H, CH 2 OH or CH 3 , and Y is an equivalent amount of at least one anion of an acid, such as chloride, bromide, carbonate, nitrate, sulfate, phosphate or carboxylate. Advantageously, the hydroxymethyl phosphorus compound is tetrakis(hydroxymethyl)phosphonium chloride or tris(hydroxymethyl)phosphine, and is present in about 1 to 3 times the phosphoramide which is preferably tris(N',N",N'"-methyl)phosphoramide [OP(NHCH 3 ) 3 ]. The condensation product, preferably dissolved in water, is padded onto fabric, preferably a polyester/cotton blend, which is thereafter dried and cured thermally and/or chemically. When a thermal cure is used it is preferred to include an aminoplast in the treatment. The fabrics are flame-retardant even after multiple launderings.
Inventors
- 👤 Destin A. Leblanc
- 👤 Robert Bruce Leblanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:03
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5004; C08; C08G; C08G79/00; C08G79/02; C08G79/04; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/268
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
The process for rendering a textile material flame retardant comprising impregnating said material with a solution containing about 15-60% by weight of a condensation product of (a) at least one hydroxy-methyl phosphorus compound selected from the group consisting of (CH.sub.2 OH).sub.4 P--Y and (CH.sub.2 OH).sub.3 P with (b) about 0.33 to 3 times the molar amount of at least one substituted phosphoramide of the formula PO(NR.sup.1 CH.sub.3) (NR.sup.2 CH.sub.3) (NR.sup.3 CH.sub.3) wherein R 1 and R 2 each independently is H or CH 2 OH, R 3 is H, CH 2 OH or CH 3 , and Y is an equivalent amount of at least one anion of an acid, said solution further containing at least one aminoplast in about 2 to 50% by weight of the condensation product, drying said material and curing said material by heating.
Claim 2
Dependent Claim
138 words
The process for rendering a textile material flame retardant comprising impregnating said material with a solution containing about 15-60% by weight of a condensation product of (a) at least one hydroxy-methyl phosphorus compound selected from the group consisting of (CH.sub.2 OH).sub.4 P--Y and (CH.sub.2 OH).sub.3 P with (b) about 0.33 to 3 times the molar amount of at least one substituted phosphoramide of the formula PO(NR.sup.1 CH.sub.3) (NR.sup.2 CH.sub.3) (NR.sup.3 CH.sub.3) wherein R 1 and R 2 each independently is H or CH 2 OH, R 3 is H, CH 2 OH or CH 3 , and Y is an equivalent amount of at least one anion of an acid, said solution further containing at least one aminoplast in about 2 to 50% by weight of the condensation product, drying said material and curing said material by heating.
Claim 3
Dependent Claim
150 words
The process for rendering a textile material flame retardant comprising impregnating said material with a solution containing about 15-60% by weight of a condensation product of (a) at least one hydroxy-methyl phosphorus compound selected from the group consisting of (CH.sub.2 OH).sub.4 P--Y and (CH.sub.2 OH).sub.3 P with (b) about 0.33 to 3 times the molar amount of at least one substituted phosphoramide of the formula PO(NR.sup.1 CH.sub.3) (NR.sup.2 CH.sub.3) (NR.sup.3 CH.sub.3) wherein R 1 and R 2 each independently is H or CH 2 OH, R 3 is H, CH 2 OH or CH 3 , and Y is an equivalent amount of at least one anion of an acid, said solution further containing at least one member selected from the group consisting of a melamine-formaldehyde resin, urea, and thiourea in about 2 to 50% by weight of the condensation product, drying said material and curing said material by heating.
Claim 4
Dependent Claim
150 words
The process for rendering a textile material flame retardant comprising impregnating said material with a solution containing about 15-60% by weight of a condensation product of (a) at least one hydroxy-methyl phosphorus compound selected from the group consisting of (CH.sub.2 OH).sub.4 P--Y and (CH.sub.2 OH).sub.3 P with (b) about 0.33 to 3 times the molar amount of at least one substituted phosphoramide of the formula PO(NR.sup.1 CH.sub.3) (NR.sup.2 CH.sub.3) (NR.sup.3 CH.sub.3) wherein R 1 and R 2 each independently is H or CH 2 OH, R 3 is H, CH 2 OH or CH 3 , and Y is an equivalent amount of at least one anion of an acid, said solution further containing at least one member selected from the group consisting of a melamine-formaldehyde resin, urea, and thiourea in about 2 to 50% by weight of the condensation product, drying said material and curing said material by heating.
Claim 5
Dependent Claim
35 words
The process of claim 2 wherein said textile material comprises a cellulosic fiber optionally blended with polyester or nylon, the polyester or nylon being present in up to about 75% by weight of the blend.
Claim 6
Dependent Claim
39 words
The process of claim 3 wherein R 1 , R 2 and R 3 each is H and said textile material comprises cotton or rayon blended with polyester which is present in about 50-65% by weight of the blend.
Claim 7
Dependent Claim
10 words
The textile material produced by the process of claim 1.
Claim 8
Dependent Claim
10 words
The textile material produced by the process of claim 2.
Claim 9
Dependent Claim
10 words
The textile material produced by the process of claim 3.
Claim 10
Dependent Claim
10 words
The textile material produced by the process of claim 4.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |