Patent US4028053A successfully refreshed from Google Patents.
US4028053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant fabrics and method for preparation thereof
Assignee: United Merchants and Manuf Inc
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Filing: 1975-02-18
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Granted: 1977-06-07
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Expires: 1995-02-18
Abstract
Abstract A process for rendering cellulose and cellulose containing fabrics fire resistant by first impregnating the fibers with a solution of an aminoplast resin, an acid and an effective amount of a dialkyl phosphono methylol alkylamide to produce fire retardancy in the resulting fabric having the formula ##STR1## wherein R is lower alkyl having 1 to 6 carbon atoms and x is an integer from 1 to 3 and polymerizing the resin while the fibers are wet and swollen. The fabric is then cured, washed and dried. The fabric obtained from this process possesses high fire-retardancy values, soft hand, and tensile values similar to that of the untreated fabric.
Inventors
- 👤 Marshall W. Duke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:42
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/432; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A process for rendering a cellulose containing fabric fire retardant comprising: a. impregnating the fibers of a cellulose-based fabric having a minimum cellulose content of about 80% by weight with an aqueous solution of an aminoplast resin, an acid having a first hydrogen acid dissociation constant in the range from about 1 × 10 - 1 to 5 × 10 - 5 , and an effective amount of a dialkyl phosphono methylol alkylamide to produce fire retardancy in the resulting fabric having the formula ##STR4## Wherein R is a lower alkyl having from 1 to 6 carbon atoms and x is an integer from 1 to 3; b. wet fixing the resin in the impregnated fabric and then c. drying the fabric; d. curing the resin in the fabric, and e. washing and drying the fabric.
Claim 2
Dependent Claim
136 words
A process for rendering a cellulose containing fabric fire retardant comprising: a. impregnating the fibers of a cellulose-based fabric having a minimum cellulose content of about 80% by weight with an aqueous solution of an aminoplast resin, an acid having a first hydrogen acid dissociation constant in the range from about 1 × 10 - 1 to 5 × 10 - 5 , and an effective amount of a dialkyl phosphono methylol alkylamide to produce fire retardancy in the resulting fabric having the formula ##STR4## Wherein R is a lower alkyl having from 1 to 6 carbon atoms and x is an integer from 1 to 3; b. wet fixing the resin in the impregnated fabric and then c. drying the fabric; d. curing the resin in the fabric, and e. washing and drying the fabric.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein the fabric is impregnated with sufficient aminoplast resin to produce a resin content in the final fabric in the range from about 2 to 25 percent by weight based on the total weight of the fabric.
Claim 4
Dependent Claim
47 words
The process of claim 1 wherein the fabric is impregnated with a sufficient amount of said dialkyl phosphono-methylol alkylamide to produce a phosphorous content in the final fabric in the range from about 1 to 5 percent by weight based on the total weight of the fabric.
Claim 5
Dependent Claim
30 words
The process of claim 1 wherein the amount of said acid is in the range from about 0.5 to 5 percent by weight based on the weight of the fabric.
Claim 6
Dependent Claim
49 words
The process of claim 1 wherein the composition of the impregnating solution is: acid: about 1 to 3 weight percent; aminoplast resin: about 5 to 10 weight percent; and dialkyl phosphono methylol alkylamide: about 18 to 26 weight percent, all weights being based on the weight of the solution.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein the impregnating solution further contains a nitrogenous compound selected from the group consisting of urea, ethylene urea, propylene urea, guanidine, dicyandiamide, oxamide, thiourea, and polyethyleneimine.
Claim 8
Dependent Claim
30 words
The process of claim 6 wherein the amount of the nitrogenous compound is in the range from about 1 to 3 weight percent based on the weight of the solution.
Claim 9
Dependent Claim
25 words
The process of claim 1 wherein subsequent to curing step (d) and prior to washing step (e) the fabric is subjected to a peroxidation step.
Claim 10
Dependent Claim
23 words
The process of claim 8 wherein just prior to said peroxidation step, the fabric is subjected to an aqueous wash under alkaline conditions.
Claim 11
Dependent Claim
13 words
The process of claim 1 wherein R is methyl and x is 2.
References Cited (Backward Citations)
US2709141A
Cited
US3374107A
Cited
US3421923A
Cited
US3577270A
Cited
US3523033A
Cited
US3546006A
Cited
US3754981A
Cited
US3936562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |