Textile size compositions which are dispersible in water and comprise an alkali metal and/or ammonium salt of a styrene-maleic anhydride copolymer containing as a copolymerized component a diester of an olefinically unsaturated dicarboxylic acid or anhydride and a monohydric alcohol and/or a polyester of such an acid or anhydride and a polyhydric alcohol. Also, textile size compositions which are dispersible in water and comprise a mixed salt of a styrene-maleic anhydride copolymer, wherein 20 to 80 weight percent of the cations of said salt are ammonium cations and 20 to 80 weight percent of the cations of said salt are alkali metal cations. Methods for sizing yarns and yarn sized with the above-mentioned compositions.
This is a division of application Ser. No. 177,827, filed Sept. 3, 1971, which, in turn, is a division of Ser. No. 744,292, filed July 12, 1968, now U.S. Pat. No. 3,630,983, which, in turn is a continuation-in-part application of co-pending application Ser. Nos. 407,551 filed Oct. 29, 1964, now abandoned, No. 491,399 filed Sept. 29, 1965, and No. 670,787 filed Sept. 26, 1967.
Graft polyesters which are useful as adhesives and coatings and especially useful in processes for sizing spun and continuous filament synthetic organic and inorganic fibrous yarn. One embodiment of the invention is a textile size composition having free carboxyl groups which is prepared in situ on a textile yarn by the application of heat or radiation to a mixture of an unsaturated polyester reactant and a monovinyl monomer reactant comprising an acidic monovinyl monomer having at least one carboxyl group or mixtures thereof with any monovinyl monomer.
