.alpha.,.alpha.'-Bis-(phosphono)dicarboxylic acid derivatives
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsJerry P. Moreau, Leon H. Chance, Gordon J. Boudreaux, George L. Drake, Jr.
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Abstract
Derivatives of dicarboxylic acids containing a phosphono group in the alpha and alpha prime position have been made. These have a wide variety of uses as intermediates. Specifically, one of the new compounds is useful in imparting wrinkle resistance as well as flame retardance to cellulosic textiles.
Claims2
A process for imparting to cotton and other cellulosic textiles the properties of wrinkle resistance and flame retardance, the process comprising:
- a. mixing 1 mole of .alpha..alpha.'-bis(diethylphosphono)adipamide with about 5 moles of formaldehyde while maintaining the pH greater than 7 with aqueous sodium carbonate and the temperature at about 75.degree.C until the amide compound is completely dissolved,
- b. diluting the mixture with water to obtain a 20% concentration, based on the initial weight of the amide,
- c. adding about 2% of Zn(NO.sub.3).sub.2.6H.sub.2 O catalyst to the dilute solution of (b),
- d. impregnating a cellulosic fabric to a wet pickup of about 75% with the solution of (c),
- e. drying the impregnated fabric for about 5 minutes at about 85.degree.C, and
- f. curing the wet impregnated fabric for about 7 minutes at about 160.degree.C.
A process for imparting to cotton and other cellulosic textiles the properties of wrinkle resistance and flame retardance, the process comprising:
- a. mixing 1 mole of .alpha.,.alpha.'-bis(diethylphosphono)adipamide with about 2 moles of formaldehyde while maintaining the pH greater than 7 with aqueous sodium carbonate and the temperature at about 75.degree.C until the amide compound is completely dissolved,
- b. adding about 7.5% of trimethylolmelamine resin, based on the weight of the total formulation,
- c. diluting the mixture with water to obtain a 20% concentration, based on the initial weight of the amide,
- d. adding about 2% of Zn(NO.sub.3).sub.2.6H.sub.2 O catalyst to the dilute solution of (C),
- e. impregnating a cellulosic fabric to a wet pickup of about 75% with the solution of (d),
- f. drying the impregnated fabric for about 5 minutes at about 85.degree.C, and
- g. curing the wet impregnated fabric for about 7 minutes at about 160.degree..
Dependencies are inferred from the claim text.