C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
117/197, 400/201
C08G 63/52 (2006.01) C08F 299/04 (2006.01) C08L 67/06 (2006.01) D06L 1/06 (2006.01) D06M 14/18 (2006.01) D06M 15/51 (2006.01)
Patent
CA 1135435
Abstract of the Disclosure There are disclosed graft polyesters 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 appli- cation of neat or radiation to a mixture of an unsaturated polyester reactant and a monovinyl monomer reactant compris- ing an acidic monovinyl monomer having at least one carboxyl group or mixtures thereof with any monovinyl monomer. Desizing can be accomplished by partial neutralization of the size to a pH of at least 6 by reacting the size with a base to render the graft polyester water-dispersible or water-soluble. The graft polyester compositions of the invention are especially useful as size compositions since they can be applied to the yarn from a solventless mixture and require only at least one of the application of heat or irradiation to graft polymerize the size in situ on the yarn. The graft polyester of the invention comprises the reaction product of (1) an unsaturated polyester which is the reaction product of at least one polycarboxylic acid reactant, preferably a dicarboxylic acid reactant and at least one polyhydric alcohol reactant, preferably a diol, wherein a minor effec- tive proportion of at least one of said reactants is .alpha.,.beta.- ethylenically unsaturated with (2) at least one monovinyl monomer reactant comprising at least one acidic monovinyl monomer containing at least one carboxyl group or a mixture of said vinyl monomer with any monovinyl monomer. Alternatively, where water-insolubility is desired in the graft polyester under both acid and basic conditions. a polyunsaturated vinyl monomer is utilized having two or more vinyl groups per molecule. The graft polyesters of the invention prepared using monovinyl monomers also can be reacted with cross-linking resins, such as aminoplast resins, confer water-insolubility under both basic and acid conditions.
334638
Basf Wyandotte Corporation
Robic Robic & Associes/associates
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