Patent ID: 7067594

Claim:
A carboxylic derivative composition derived from a carboxylated isobutylene-isoprene copolymer having {overscore (M)} n ranging from about 200 to about 10,000, said copolymer having thereon from about 0.8 to about 7 moles per mole of copolymer of groups derived from at least one α,β-unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, crotonic acid, citraconic acid, itaconic acid, mesaconic acid, and anhydrides, halides, and esters of the foregoing acids, reacted with at least one of (a) amines characterized by the presence within their structure of at least one condensable H—N< group, (b) alcohols, (c) reactive metals or reactive metal compounds, and (d) a combination of two or more of any of (a) through (c), the components of (d) having been reacted with the carboxylated isobutylene-isoprene copolymer simultaneously or sequentially, in any order.