. . "resins such as polyvinyl alcohols, polyvinyl alcohol copolymers, polyvinyl chloride, block copolymers of alkenyl aromatics with vinyl aromatics and polyesteramides, copolymers of vinyl chloride with vinyl acetate, acrylic esters or vinylidene chloride. 7) Polyamides such as poly(hexamethylene adipamide) and others prepared from diamines, fatty acids, dibasic acids, and amino acids (like polycaprol" . . .