US4216261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-durable, water repellant, fire resistant intumescent process
Assignee: United States Department of the Army
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Filing: 1978-12-06
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Granted: 1980-08-05
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Expires: 1998-12-06
Abstract
Abstract A process for imparting an intumescent, water repellent, fire retardant finish to fabrics comprising applying to the fabric an aqueous dispersion and drying same.
Inventors
- 👤 Gil M. Dias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:50
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/18; C09D5/185; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2205; Y10T442/2631; Y10T442/2648; Y10T442/2656
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A process for imparting an intumescent, water repellent, fire retardant finish to fabrics, which comprises applying to the fabric an aqueous dispersion of: a. 5.9-20 percent by weight of a substantially water insoluble ammonium polyphosphate catalyst, b. 2.6-10 percent by weight of a carbonific, c. 2-6 percent by weight of a blowing agent selected from the group consisting of dicyanidiamide, urea, melamine or guanidine, d. 10-20 percent by weight of an emulsion containing a chlorinated paraffin, a lower temperature blowing agent, e. 2-12 percent by weight of viscous, water insoluble liquid solution containing 10 percent by weight of a water repellent selected from the group consisting of lead stearate, aluminum acetate, aluminum silicate and hydrocarbon waxes, 10 percent by weight of a fire-retardant selected from the group consisting of zinc borate, antimony oxide, stannic oxide and zinc oxide, 50 percent by weight of a binder, and 30 percent by weight of a solvent vehicle, and f. 32-75.5 percent by weight of water; and then drying said dispersion on said fabric.
Claim 2
Dependent Claim
170 words
A process for imparting an intumescent, water repellent, fire retardant finish to fabrics, which comprises applying to the fabric an aqueous dispersion of: a. 5.9-20 percent by weight of a substantially water insoluble ammonium polyphosphate catalyst, b. 2.6-10 percent by weight of a carbonific, c. 2-6 percent by weight of a blowing agent selected from the group consisting of dicyanidiamide, urea, melamine or guanidine, d. 10-20 percent by weight of an emulsion containing a chlorinated paraffin, a lower temperature blowing agent, e. 2-12 percent by weight of viscous, water insoluble liquid solution containing 10 percent by weight of a water repellent selected from the group consisting of lead stearate, aluminum acetate, aluminum silicate and hydrocarbon waxes, 10 percent by weight of a fire-retardant selected from the group consisting of zinc borate, antimony oxide, stannic oxide and zinc oxide, 50 percent by weight of a binder, and 30 percent by weight of a solvent vehicle, and f. 32-75.5 percent by weight of water; and then drying said dispersion on said fabric.
Claim 3
Dependent Claim
35 words
A process in accordance with claim 1 wherein at least 40 percent by weight and up to 100 percent by weight of the fabric, dry solids basis, of the composition is applied to the fabric.
Claim 4
Dependent Claim
29 words
A process in accordance with claim 2 wherein said emulsion containing chlorinated paraffin contains 11.8 percent by weight of a chlorinated paraffin, a solvent for said paraffin and water.
Claim 5
Dependent Claim
31 words
A process in accordance with claim 3 wherein said carbonific is tripentaerythritol, said blowing agent is melamine, and said chlorinated paraffin has a chlorine content of about 70 percent by weight.
Claim 6
Dependent Claim
32 words
A process in accordance with claim 4 wherein said water repellent is aluminum silicate, said fire retardant is antimony oxide, and said binder is chlorinated paraffin containing from 40% to 70% chlorine.
Claim 7
Dependent Claim
15 words
A process in accordance with claim 5 wherein said aqueous dispersion further contains mercury thiocyanate.
Claim 8
Dependent Claim
9 words
A product produced by the process of claim 1.
Claim 9
Dependent Claim
9 words
A product produced by the process of claim 5.
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) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |