Patent ID: 6022929
Filing Date: 2000-02-08
Classification: C08F

Abstract:
A process for producing an additive useful in oleaginous compositions which comprises:reacting starting amorphous copolymer comprising at least one repeating unit having the formula: ##STR29## wherein R is a hydrocarbon having from 2 to 22 carbon atoms, and at least one repeating unit selected from the group consisting of repeating units having the formula: ##STR30## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different hydrocarbon groups or substituted hydrocarbon groups having from 1 to 22 carbon atoms, the copolymer comprising at least 50 mole % of --(CH.sub.2 --CHR)--, and less than 5 mole % of the repeating unit --(H.sub.2 C--CR.sup.2 R.sup.3)-- being at least 95% amorphous and having from 0.5 to 1.0 mole % of carbon-carbon double bond per starting polymer chain, and a number average molecular weight of from about 1,300 to about 200,000, in a manner and under conditions to functionalize the amorphous copolymer at the double bond, with at least one functional compound comprising at least one functional group selected from the group consisting of an alkyl phenol, a substituted alkyl phenol, C.sub.3 to C.sub.10 monocarboxylic acid, C.sub.1 or C.sub.5 alcohol derived mono- or diester derivatives of said C.sub.3 to C.sub.10 monocarboxylic acid, C.sub.4 to C.sub.10 dicarboxylic acid, anhydride or C.sub.1 or C.sub.5 alcohol derived mono- or diester derivatives of said C.sub.4 to C.sub.10 dicarboxylic acid, oxycarboxyl, carbonyl, formylcarbonyl, epoxy and hydroxyl groups.