Decreasing the viscosity of butyl rubber latex by treatment with anion and cation exchange resins

Claim 1

A METHOD FOR DECREASING THE VISCOSITY OF A BUTYL RUBBER LATEX OBTAINED BY EMULSIFYING A 5 TO 35 WT. PERCENT SOLUTION IN A C4 TO C10 HYDROCARBON SOLVENT OF 100 PARTS BY WT. OF A COPOLYMER OF A MAJOR PROPORTION OF A C4 TO C8 ISOOLEFINA AND A C4 TO C14 DIOLEFIN WITH WATER CONTAINING ABOUT 0.15 TO ABOUT 3.0 PARTS BY WT. OF SODIUM DIHYDROGEN PHOSPHATE AND AN EMULSIFIER SELECTED FROM THE GROUP CONSISTING OF THE SODIUM AND POTASSIUM SALTS OF SULFATED NONYLPHENOXYPOLYETHOXYETHANOL, THE SODIUM SALT OF SULFATED TRIDECOXYPOLYETHOXYETHANOL, THE LITHIUM AND POTASSIUM SALTS OF SULFATED DUODECOXYPOLYETHOXYETHANOL, THE AMMONIUM AMINE SALTS OF SULFATED NONYLPHENOXYPOLYETHOXYETHANOL, THE AMMONIUM AND AMINE SALTS OF SULFATED TRIDECOXYPOLYEHOXYETHANOL, THE AMMONIUM AND AMINE SALTS OF SULFATED DUODECOXYPOLYETHOXYETHANOL, SODIUM LAYRYL SULFATE, POTASSIUM LAURYL SULFATE, AND THE SODIUM SALT OF SULFATED OCTYLPHENOXYPOLYETHOXYETHANOL, WHICH COMPRISES CONTACTING THE SAID LATEX WITH 0.2 TO 30 PARTS BY WEIGHT OFAN ALKALI-TREATED ANION EXCHANGE RESIN RECOVERING THE LATEX FROM THE ANION EXCHANGE RESIN AND THEN CONTACTING IT WITH AN ACID-TREATED CATIONIC EXCHANGE RESIN AND FINALLY REMOVING THE TREATED LATEX FROM THE CATIONIC EXCHANGE RESIN.

Claim 2

A METHOD FOR DECREASING THE VISCOSITY OF A BUTYL RUBBER LATEX OBTAINED BY EMULSIFYING A 5 TO 35 WT. PERCENT SOLUTION IN A C4 TO C10 HYDROCARBON SOLVENT OF 100 PARTS BY WT. OF A COPOLYMER OF A MAJOR PROPORTION OF A C4 TO C8 ISOOLEFINA AND A C4 TO C14 DIOLEFIN WITH WATER CONTAINING ABOUT 0.15 TO ABOUT 3.0 PARTS BY WT. OF SODIUM DIHYDROGEN PHOSPHATE AND AN EMULSIFIER SELECTED FROM THE GROUP CONSISTING OF THE SODIUM AND POTASSIUM SALTS OF SULFATED NONYLPHENOXYPOLYETHOXYETHANOL, THE SODIUM SALT OF SULFATED TRIDECOXYPOLYETHOXYETHANOL, THE LITHIUM AND POTASSIUM SALTS OF SULFATED DUODECOXYPOLYETHOXYETHANOL, THE AMMONIUM AMINE SALTS OF SULFATED NONYLPHENOXYPOLYETHOXYETHANOL, THE AMMONIUM AND AMINE SALTS OF SULFATED TRIDECOXYPOLYEHOXYETHANOL, THE AMMONIUM AND AMINE SALTS OF SULFATED DUODECOXYPOLYETHOXYETHANOL, SODIUM LAYRYL SULFATE, POTASSIUM LAURYL SULFATE, AND THE SODIUM SALT OF SULFATED OCTYLPHENOXYPOLYETHOXYETHANOL, WHICH COMPRISES CONTACTING THE SAID LATEX WITH 0.2 TO 30 PARTS BY WEIGHT OFAN ALKALI-TREATED ANION EXCHANGE RESIN RECOVERING THE LATEX FROM THE ANION EXCHANGE RESIN AND THEN CONTACTING IT WITH AN ACID-TREATED CATIONIC EXCHANGE RESIN AND FINALLY REMOVING THE TREATED LATEX FROM THE CATIONIC EXCHANGE RESIN.