100800 ⎘
Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers; Homopolymers or copolymers of nitriles Homopolymers or copolymers of nitriles containing four or more carbon atoms