STAR/COMB-BRANCHED POLYAMIDES AND STAR/COMB-BRANCHED POLYAMINE DERIVATIVES THEREOF

摘要

A star-branched polyamide having at least 3 branches emanating from the residue of a core compound pending from a substantially linear polymer backbone wherein each branch has a plurality of amide moieties in which each such amide moiety has its amide nitrogen in the chain of the branch and each such amide nitrogen bears a pendant carbonyl moiety, said amide moieties being hydrolyzable to form amine moieties without cleaving the chain of the branch. Star-branched polyamides having good resistance to degradation upon exposure to shear are prepared by reacting polyvalent core compounds such has tribromoneopentyl alcohol with an oxazoline such as 2-ethyl-2-oxazoline to provide the desired polyamide. The polyamides are readily hydrolyzed with acid such as hydrochloric acid to form/star/comb-branched polyamines. The polyamides and the polyamines are useful as viscosity enhancing agents in such applications as paints, mobility control agents and hydraulic fluids. 31,963-F