Abstract: This invention is concerned with a novel rubber processing aid, as well as with the use of that aid for improving the processing of rubber. More specifically, the present invention is concerned with the formation of an amine salt of an aralkylsulfonic acid through the deposition of an amine and an aralkylsulfonic acid on a natural or synthetic clay base. This invention is further concerned with the use of said aralkylsulfonic salt composition, optionally modified with additives such as a thioether or a long chain fatty acid, for improving the processing of natural and synthetic rubber.

Abstract: A particulate, relatively free-flowing rubber processing aid capable of imparting release properties and improved flow characteristics to rubber during compounding and molding of the rubber, comprises petrolatum and particulate clay in proportions of petrolatum to clay of from about 1:4 to about 4:1. The amount of processing aid which is effective to impart improved release and flow properties is from about 0.1 to about 5 weight percent of the total rubber compound.

Abstract: The protected copolymer compositions of the present invention have the following structural formula: ##STR1## WHEREIN A is a cyclic or acyclic group having 1 to 12 carbon atoms, 2 to 26 - (j + m) hydrogen atoms, 0 to 4 oxygen atoms, and 0 to 2 nitrogen atoms,E is a group having the structure ##STR2## wherein n is 3 to 5, G is a group having the structure--C.sub.u H.sub.2u-2 (CO.sub.2 C.sub.v H.sub.2v + 1 --.sub.2Wherein u is 2 or 3 and v is an integer from 2 to 9,K is a radical selected from the group consisting ofR--, RCO--, RNHCO--, ROC(CH.sub.3)H--, ##STR3## wherein R is a cyclic or acyclic radical having 1 to 18 carbon atoms and x is 3 or 4, J IS AN INTEGER FROM 0 TO 8,m is an integer from 0 to 4,j + m is 1 to 8,s is an integer from 2 to 4,w is 1 to 200,p is 1 to 10,q is 1 to 10, andr is 1 to 50.The compositions of this invention have been found to be useful as stabilizers in the preparation of cellular foams.