Patent ID: 7637961

Claim:
An oligomeric composition comprising: i) oligomers comprising from 90 to 100 weight % of at least one C 1 to C 40 alkyl (meth)acrylate first monomer and from zero to 10 weight % of at least one ionic monomer, as polymerized units, based on a weight of said oligomers, wherein said oligomers have a weight average molecular weight in the range of 1,500 to 25,000; ii) from 4 to 50 weight %, based on said weight of said oligomers, of at least one amphiphilic copolymer formed from a hydrophobic monomer selected from the group consisting of C 4 to C 40 alkyl (meth)acrylates, C 4 to C 22 alkoxy or C 1 to C 12 alkyl phenoxy(polyethylene oxide) (meth)acrylates, C 1 to C 18 1-alkenes, vinyl esters of C 8 to C 22 alkyl carboxylic acids, and combinations of one or more of the foregoing hydrophobic monomers, and a hydrophilic monomer selected from the group consisting of carboxylic acid, strong acid, and amine substituted (meth)acrylates; and 0.5 to 10 weight % α-methyl styrene based on the total weight of said monomers.