Maleic anhydride/vinyl or allyl ether polymer stain-resists
AssigneeE. I. Du Pont de Nemours and Company
InventorEngelbert Pechhold
Life of this patent
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Abstract
A polyamide fibrous substrate having deposited on it an amount of a composition effective to impart stain-resistance comprising a water-soluble or water-dispersible maleic anhydride/allyl ether or vinyl ether polymer or a mixture of said polymers, and processes for preparing the substates. The maleic anhydride polymer is used either in hydrolyzed form.
Claims14
A process for imparting resistance to staining of a polyamide textile substrate by an acid dye which comprises applying to said substrate an effective amount of an aqueous solution or an aqueous dispersion of a composition comprising a water-soluble or water-dispersible hydrolyzed polymer of maleic anhydride and (a) an allyl ether or (b) a vinyl ether or a mixture of the same having a pH of 3 or less, wherein said polymer contains between about 0.7 and 1.3 polymer units derived from one or more allyl or vinyl ether monomers per polymer unit derived from maleic anhydride, and said ether is represented by the formula:
- CH.sub.2 .dbd.CH--(CH.sub.2).sub.k --O--(CH.sub.2).sub.m --(A).sub.n --R
- wherein
- R is hydrogen or an alkyl radical containing 4 to 8 carbon atoms;
- A is a divalent radical --SO.sub.2 R.sup.1 -- or --CONR.sup.1 -- in which R.sup.1 is hydrogen or an alkyl radical containing 1 to 6 carbon atoms;
- k is 0 or 1;
- m is 0 or 2;
- and
- n is 0 or 1.
Dependencies are inferred from the claim text.