Patent ID: 7834085

Claim:
A self reversible inverted latex comprising; an oily phase; an aqueous phase; at least one water-in-oil emulsifying agent; and at least one oil-in-water emulsifying agent comprising 25% to 70% by weight of a crosslinked cationic copolymer, wherein the crosslinked cationic copolymer is formed by inverse emulsion polymerization, and the crosslinked cationic compolymer comprises: from about 55% to about 95% of the monomeric units being acrylamide; from about 5% to about 35% of the monomeric units being at least one cationic monomer; from about 0.1% to about 5% of the monomeric units being at least one nonionic surfactant monomer of the formula (I): A-C(═O)—O—[(CH 2 —CH(R 1 )—O] n —R (I), wherein: (i) n is from 1 to 10, (ii) A is a vinyl radical, (iii) R 1 comprises at least one component selected from the group consisting of a hydrogen atom, a methyl radical, and an ethyl radical, and (iv) R is a lauryl radical; and from about 0.005% to about 1% of a crosslinking agent, expressed relative to the monomers used, wherein said percentages are expressed in terms of monomeric units.