US4014829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame resistant fiber blends
Assignee: EIDP Inc
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Filing: 1974-10-30
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Granted: 1977-03-29
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Expires: 1994-10-30
Abstract
Abstract A flame-resistant blend of textile fibers comprising (a) from about 20 to 40% by weight of a normally flammable textile fiber aesthetically suitable for wearing apparel and (b) from about 60 to 80% by weight of poly-(metaphenylene isophthalamide) fiber containing distributed substantially throughout its whole interior a finely divided cross-linked reaction product of at least 5% by weight (unreacted basis) of a tetrakis hydroxymethyl phosphonium compound and a resin containing active hydrogen.
Inventors
- 👤 Bennett Ray Baird
- 👤 Leander Adair Sherbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:03
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/04; D02G3/047; D01; D01F; D01F1/00; D01F1/02; D01F1/07; D01F11/00; D01F11/04; D01F11/08; D01F6/00; D01F6/58; D01F6/60; D01F6/605; D02G3/44; D02G3/443; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; D06M13/298; D06M2101/00; D06M2101/16; D06M2101/30; D06M2101/34; D06M2101/36; D06M2200/00; D06M2200/30; D10; D10B; D10B2331/00; D10B2331/02; D10B2331/021; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A flame-resistant blend of textile fibers comprising (a) from about 20 to 40% by weight of a normally flammable textile fiber aesthetically suitable for wearing apparel and (b) from about 60 to 80% by weight of poly(metaphenylene isophthalamide) fiber containing distributed substantially throughout its whole interior a finely divided cross-linked reaction product of a tetrakis hydroxymethyl phosphonium compound selected from the group consisting of tetrakis hydroxymethyl phosphonium chloride, tetrakis hydroxymethyl phosphonium oxide and reactive derivatives thereof and a resin containing active hydrogen selected from the group of melamine formaldehyde, phenolformaldehyde and hexamethylol melamine, the phosphonium compound being present in an amount of from 5-20% by weight (unreacted basis) of the poly(metaphenylene isophthalamide) fiber.
Claim 2
Dependent Claim
113 words
A flame-resistant blend of textile fibers comprising (a) from about 20 to 40% by weight of a normally flammable textile fiber aesthetically suitable for wearing apparel and (b) from about 60 to 80% by weight of poly(metaphenylene isophthalamide) fiber containing distributed substantially throughout its whole interior a finely divided cross-linked reaction product of a tetrakis hydroxymethyl phosphonium compound selected from the group consisting of tetrakis hydroxymethyl phosphonium chloride, tetrakis hydroxymethyl phosphonium oxide and reactive derivatives thereof and a resin containing active hydrogen selected from the group of melamine formaldehyde, phenolformaldehyde and hexamethylol melamine, the phosphonium compound being present in an amount of from 5-20% by weight (unreacted basis) of the poly(metaphenylene isophthalamide) fiber.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein component (a) is cotton.
Claim 4
Dependent Claim
20 words
The composition of claim 2 wherein the cotton constitutes from about 20% to about 30% by weight of the blend.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein component (a) is an acrylic fiber.
Claim 6
Dependent Claim
21 words
The composition of claim 4 wherein the acrylic fiber constitutes from about 20% to about 25% by weight of the blend.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein component (a) is a polyester fiber.
Claim 8
Dependent Claim
14 words
The composition of claim 1 wherein said phosphonium compound is tetrakis hydroxymethyl phosphonium chloride.
Claim 9
Dependent Claim
11 words
The composition of claim 1 wherein the resin is melamine formaldehyde.
Claim 10
Dependent Claim
11 words
A flame-resistant fabric prepared from the fiber blend of claim 1.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |