US4026711A
Expired / Lapsed
US
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Flame retardant finish for textiles
Assignee: Wyeth Holdings LLC
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Filing: 1971-11-11
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Granted: 1977-05-31
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Expires: 1991-11-11
Abstract
Abstract Stable, aqueous, flame retardant finishes for cellulosic textile materials employing tetrakis(hydroxymethyl)phosphonium phosphate, tetrakis(hydroxymethyl)phosphonium carboxylate and urea or a urea-formaldehyde condensate, and, processes employing said finishes are disclosed, together with processes for the preparation of the phosphonium compounds from tris(hydroxymethyl)phosphines.
Inventors
- 👤 Robert George Weyker
- 👤 William Frederick Baitinger, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:56
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431; D06M15/667; D06M15/673
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
An aqueous flame retardant finish composition for cellulosic textile materials comprising tetrakis(hydroxymethyl)phosphonium phosphate, tetrakis(hydroxymethyl)phosphonium carboxylate, and urea or a urea-formaldehyde condensate, or both.
Claim 2
Dependent Claim
23 words
An aqueous flame retardant finish composition for cellulosic textile materials comprising tetrakis(hydroxymethyl)phosphonium phosphate, tetrakis(hydroxymethyl)phosphonium carboxylate, and urea or a urea-formaldehyde condensate, or both.
Claim 3
Dependent Claim
44 words
A composition according to claim 1 having between 10 and 75 mole percent of tetrakis(hydroxymethyl)phosphonium phosphate and between 90 and 25 mole percent of tetrakis(hydroxymethyl)phosphonium carboxylate, and between 0.5 and 3.0 moles of urea or urea-formaldehyde condensate per mole of the combined phosphonium salt.
Claim 4
Dependent Claim
21 words
A composition according to claim 1 containing between 0 and 0.5 mole of free formaldehyde per mole of combined phosphonium salt.
Claim 5
Dependent Claim
21 words
A composition according to claim 1 containing between 0 and 1 mole of melamine-formaldehyde condensate per mole of combined phosphonium salt.
Claim 6
Dependent Claim
25 words
A composition according to claim 1 where the tetrakis(hydroxymethyl)phosphonium carboxylate is selected from the group consisting of tetrakis(hydroxymethyl)phosphonium acetate, lactate, glycolate, malate oxalate and citrate.
Claim 7
Dependent Claim
30 words
A composition according to claim 1 wherein the aqueous solution contains between 10 and 75 moles percent of tetrakis(hydroxymethyl)phosphonium phosphate and between 90 and 25 mole percent of tetrakis(hydroxymethyl)phosphonium carboxylate.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |