Solutions of rubbery polymers from particles of uniform diameter

Claim 1

A PROCESS FOR PREPARING SUBSTANTIALLY LUMP-FREE HOMOGENEOUS SOLUTIONS OF HIGH MOLECULAR WEIGHT RUBBERY POLYMERS IN LUBRICATING OIL WHICH COMPRISES AGITATING WITH THE LUBRICATING OIL AT A TEMPERATURE OF ABOUT 300* F., POLYMER PARTICLES SELECTED FROM THE GROUP OF RUBBERY POLYMERS CONSISTING OF NATURAL RUBBER, THE COPOLYMER, OF BUTADIENE AND STYRENE, THE COPOLYMER OF BUTADIENE AND ACRYLONITRILE, POLYISOBUTYLENE, POLYETHYLENE, AND THE COPOLYMER OF ISOBUTYLENE AND A DIOLEFIN SELECTED FROM THE GROUP CONSISTING OF BUTADIENE AND ISOPRENE, SAID POLYMER PARTICLES BEING OF UNIFORM SIZE OF NOT OVER 1/4 INCH DIAMETER; THE AGITATION BEING UNTIL AT LEAST ABOUT 6.0 WEIGHT PERCENT OF THE POLYMER IS SOLVATED AND UNTIL THE VISOCITY OF THE RESULTING SOLUTION ATTAINS A MINIMUM VALUE OF AT LEAST ABOUT 3,500 CENTISTOKES AT 210* F.