Polymer water-in-oil emulsions

Claim 2

A water soluble ter-or higher addition polymer water-in-oil emulsion comprising: (a) an aqueous phase comprising from about 60 to about 80 weight percent and containing therein from about 30 to about 70 weight percent of a ter-or higher addition polymer containing at least one polymerized hydrophobic monomer and from about 30 to about 70 weight percent of water. (b) a hydrophobic liquid comprising from about 15 to about 39.5 weight percent; and (c) an oil-soluble surfactant comprising from about 0.5 to about 5 weight percent, said weight percent based on the total weight of the emulsion.

Claim 3

A water-in-oil emulsion as defined in claim 1 wherein the aqueous phase comprises from about 68 to about 78 weight percent and contains therein from about 30 to about 70 weight percent of a ter-or higher polymer and from about 30 to about 70 weight percent of water.

Claim 4

A water-in-oil emulsion as defined in claim 1 wherein the hydrophobic liquid comprises from about 19 to about 31 weight percent.

Claim 5

A water-in-oil emulsion as defined in claim 1 wherein the oil-soluble surfactant comprises from about 1 to about 3 weight percent.

Claim 6

A water-in-oil emulsion as defined in claim 1 wherein the terpolymer is of the following formula: ##STR8## wherein R, R 1 and R 3 are independently hydrogen or methyl, R 2 + is an alkali metal ion, such as Na + or K + , R 4 is OR 5 , where R 5 is an alkyl group having up to 5 carbon atoms, ##STR9## wherein R 7 is either methyl or ethyl, ##STR10## phenyl substituted phenyl, CN, or ##STR11## and R 6 is an alkyl group having up to 8 carbon atoms, wherein (a) is from about 5 to about 90, perferably from about 30 to about 60 percent, (b) is from 5 to about 90, preferably from about 30 to about 60 percent, (c) is from about 0.2 to about 20, preferably from about 1 to about 10 percent, and (d) is an integer of from about 1,000 to about 500,000.

Claim 7

A water-in-oil emulsion as defined in claim 5 wherein the higher polymer is a tetrapolymer of the following general formula: ##STR12## wherein R, R 1 , R 2 + , R 3 , R 4 , a, b, c, and d are as defined in claim 5 and e is from about 0.1 to about 20 percent.

Claim 8

A water-in-oil emulsion as defined in claim 1 wherein the hydrophobic liquid is selected from benzene, xylene, toluene, mineral oils, kerosenes, petroleum, Isopar M, or mixtures thereof.

Claim 9

A water-in-oil emulsion as defined in claim 1 wherein the sufactant has an HLB value of from about 1 to about 10.

Claim 10

A water-in-oil emulsion as defined in claim 5 wherein the terpolymer has an intrinsic viscosity from about 15 to about 22 dl/g.