| abstract |
A terpolymer having the formula: <IMAGE> wherein R1 is selected from the group consisting of C1 to C20 alkyl groups, C6 to C20 aryl groups and C6 to C30 alkylaryl groups; R2 is hydrogen or methyl group, n is about 1 to 60; y is about 2.0 to about 35.0 mole %, and x is about 65.00 to about 98.00 mole %, z is about 0.1 to about 3.0 mole % and n is about 1 to about 60 and M is a metal cation selected from the group consisting of Groups IA, IIA, IB and IIB of the Periodic Table of Elements, wherein said terpolymer has an intri1sic viscosity of about 1 top about 25, wherein said terpolymer is formed by a free radical solution polymerization in the absence of a surfactant or emulsifier and comprises the polymerization of an acrylamide monomer, a metal acrylate monomer and an alkyl poly(etheroxy) acrylate monomer in the presence of a free radical initiation at a temperature of at least 5 DEG C. for at least 0.5 hours. |