Highly pure halogenated rubbers

A mixture comprising:

• a dispersion of particles of a halogenated elastomer in an aqueous medium;
• at least one lower critical solution temperature (LOST) compound in the aqueous medium having a cloud point of 0 to 100° C.;
• and
• an organic diluent;
• wherein the mixture has a temperature of 50° C. to 100° C.

A slurry comprising:

• a dispersion of particles of a halogenated elastomer in an aqueous medium;
• and
• at least one lower critical solution temperature (LOST) compound having a cloud point of 0 to 100° C.;
• wherein the at least on LOST compound is selected from the group consisting of:
• poly(N-isopropylacrylamide), poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide, poly(N-isopropylacrylamide)-alt-2-hydroxyethylmethacrylate, poly(N-vinylcaprolactam), poly(N,N-diethylacrylamide), poly[2-(dimethylamino)ethyl methacrylate], poly(2-oxazoline) glyhalogenated elastomer, poly(3-ethyl-N-vinyl-2-pyrrolidone), hydroxylbutyl chitosan, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monooleate, methyl cellulose having a viscosity of 25 to 4000 cp (measured at 2 wt. % in water at 20° C.), hydroxypropyl cellulose, hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, poly(ethylene glycol) methacrylate having 2 to 6 ethylene glycol units, polyethyleneglycol-co-polypropylene glycol, polyethyleneglycol-co-polypropylene glycol, ethoxylated iso-013H27-alcohols, polyethylene glycol having 4 to 50 ethyleneglycol units, polypropylene glycol having 4 to 30 propyleneglycol units, polyethylene glycol monomethyl ether having 4 to 50 ethyleneglycol units, polyethylene glycol dimethyl ether having 4 to 50 ethyleneglycol units, polyethylene glycol monoethyl ether having 4 to 50 ethyleneglycol units, polyethylene glycol diethyl ether having 4 to 50 ethyleneglycol units, polypropylene glycol monomethyl ether having 4 to 50 propyleneglycol units, polypropylene glycol dimethyl ether having 4 to 50 propyleneglycol units, polypropylene glycol monoethyl ether having 4 to 50 propyleneglycol units, and polypropylene glycol diethyl ether having 4 to 50 propyleneglycol units.