Patent ID: 6372851
Filing Date: 2002-04-16
Classification: C08F

Abstract:
An acid-modified hydrocarbon resin suitable as a natural rosin alternative comprising the reaction product of:(a) a first predominantly C5 hydrocarbon stream comprising unsaturated aliphatic monomers further comprising a combination of piperylene monomers; (b) a second hydrocarbon stream comprising an isoolefin monomer; and (c) an acidic stream comprising a dicarboxylic acid or anhydride; wherein a weight ratio of said isoolefin monomer to said unsaturated aliphatic monomers is from about 0.25/1 to about 0.75/1 and a weight ratio of said dicarboxylic acid or anhydride to said unsaturated aliphatic monomers and said isoolefin monomer is from about 0.15 to about 0.45 to yield said resin having an acid number from about 30 to about 170 mg KOH/g and a mettler drop softening point from about 40Â° C. to about 140Â° C.