Novel emulsifiable cationic vinyl resins and process for preparing the same

Claim 1

A process for preparing a modified cationic vinyl polymer comprising copolymerizing, at a temperature between about 125° and 200°C., a blend of monomers comprising maleic anhydride, a polymerizable styrene and an alkyl acrylate, in the presence of a free radical initiator, therafter, reacting the resultant polymer at a temperature not in excess of 140°C. with a total of 1 mol of an amino alcohol and/or a difunctional amine per mol maleic anhydride moiety in said polymer until the resulting modified polymer has substantially no residual anhydride rings; wherein said amino alcohol has the formula: ##EQU1## wherein R 1 is an alkylene group having C 2 -C 12 , and R 2 and R 3 are each an alkyl group having C 1 to C 4 , and wherein said difunctional amine has the formula: ##EQU2## wherein R 4 is hydrogen or an alkyl group having C 1 -C 4 ; R 5 is an alkylene group having C 2 to C 12 ; and R 6 and R 7 are each alkyl groups having C 1 to C 4 ; thereafter reacting the modified polymeric material at a temperature not in excess of 140°C. with a monoepoxy compound having the formula: ##EQU3## wherein R 8 and R 9 are each hydrogen or an alkyl group having C 1 to C 18 but when R 8 and R 9 are each alkyl, they shall contain not more than a total of 18 carbon atoms; wherein the molar ratio of the styrene to maleic anhydride is between about 1:1 and 1:0.05, styrene to maleic anhydride respectively, and the alkyl acrylate is present in an amount between about 40% and 80%, by weight, based on the total weight of all of the polymerizable monomers, wherein said monomers, amino alcohol compound and/or difunctional amino compound and said monoepoxy compound are present in amounts sufficient to supply to the resultant modified polymeric material from about 5 grams to about 30 grams per 1,000 grams 100% solids of the hydroxyl function and from 1 gram to about 25 grams per 1,000 grams 100% solids of the tertiary amino nitrogen function, based on the said modified polymeric material, wherein the thus formed polymeric material is substantially free of unreacted monomers.