Claims
- 1. 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 .times. 10.sup.-.sup.1 to 5 .times. 10.sup.-.sup.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.
- 2. 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.
- 3. 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.
- 4. 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.
- 5. 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.
- 6. 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.
- 7. 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.
- 8. 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.
- 9. The process of claim 8 wherein just prior to said peroxidation step, the fabric is subjected to an aqueous wash under alkaline conditions.
- 10. The process of claim 1 wherein R is methyl and x is 2.
CROSS-REFERENCES TO RELATED APPLICATIONS
This Application is a continuation-in-part of our copending application, Ser. No. 314,532, filed Dec. 13, 1972, the contents of which are incorporated herein by reference.
US Referenced Citations (8)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
314532 |
Dec 1972 |
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