US3944688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of water-repellent, fire-resistant nonwoven fabrics
Assignee: Arkema Inc
•
Filing: 1973-10-23
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Granted: 1976-03-16
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Expires: 1993-10-23
Abstract
Abstract A fire-resistant, water- and oil-repellent nonwoven fabric is prepared using a fire-retardant, surfactant-free adhesive/binder containing halogen and/or phosphorus additive, followed by treatment with a fluorochemical repellent agent.
Inventors
- 👤 Charles Edward Inman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:14
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/07; D06M11/11; D06M11/13; D06M11/80; D06M11/82; D06M13/00; D06M13/244; D06M13/282; D06M13/292; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/267; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A process for preparing an oil and water-repellent, fire retardant, nonwoven fabric which comprises the steps of: (A) providing a dry nonwoven fabric of fibers bound together by about 5 to 50%, based on dry weight of the nonwoven fabric, of surfactant-free adhesive solid selected from the class consisting of vinyl acetate and alkyl acrylate aqueous dispersion polymers, containing in admixture therewith from about 25 to 110%, based on the weight of the polymer, of a flame retardant agent selected from the group consisting of halogen, phosphorus and halogen and phosphorus containing flame retardants; (B) treating the fabric with an aqueous bath containing in admixture a fluorochemical oil and water-repellent composition in an amount sufficient to deposit on the fabric from about 0.05 to 0.8% solids by weight thereof, based on the dry fabric weight, and drying the fabric.
Claim 2
Dependent Claim
139 words
A process for preparing an oil and water-repellent, fire retardant, nonwoven fabric which comprises the steps of: (A) providing a dry nonwoven fabric of fibers bound together by about 5 to 50%, based on dry weight of the nonwoven fabric, of surfactant-free adhesive solid selected from the class consisting of vinyl acetate and alkyl acrylate aqueous dispersion polymers, containing in admixture therewith from about 25 to 110%, based on the weight of the polymer, of a flame retardant agent selected from the group consisting of halogen, phosphorus and halogen and phosphorus containing flame retardants; (B) treating the fabric with an aqueous bath containing in admixture a fluorochemical oil and water-repellent composition in an amount sufficient to deposit on the fabric from about 0.05 to 0.8% solids by weight thereof, based on the dry fabric weight, and drying the fabric.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein the amount of adhesive used in step A is from aabout 20 to 30%.
Claim 4
Dependent Claim
26 words
A process according to claim 1 wherein the amount of flame retardant additive agent is from about 50 to 100% based on the weight of polymer.
Claim 5
Dependent Claim
40 words
A process according to claim 1 wherein the flame retardant additive agent is selected from the group consisting of tricresyl phosphate, diphenyl cresyl phosphate, tributyl phosphate, trioctyl phosphate, tris (2-ethylhexyl) phosphate, tris(chloroethyl) phosphate, tris(dichloropropyl) phosphate, tris(dibromopropyl) phosphate, and chlorinated paraffins.
Claim 6
Dependent Claim
36 words
A process according to claim 1 wherein the aqueous bath of step B contains a water-soluble fire-retardant salt in an amount sufficient to deposit up to about 6% of salt based on weight of dry fabric.
Claim 7
Dependent Claim
31 words
A process according to claim 5 wherein the fire-retardant salt is selected from the group consisting of ammonium sulfate, ammonium sulfamate, ammonium bromide, mono-and diammonium phosphates, borax, and boric acid salts.
References Cited (Backward Citations)
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US2357725A
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US2978785A
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US3081197A
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US3256228A
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US3655422A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |