Patent ID: 8835536

Claim:
A high silica loaded polymer silica masterbatch comprising: a. from 30 weight percent to 50 weight percent styrene butadiene rubber; and b. from 40 weight percent to 80 weight percent of a functionalized silica comprising: (i) dry precipitated silica with a specific surface area in the range of 100 to 300 m 2 /gm; (ii) from 0.1 weight percent to 25 weight percent of a plurality of silane coupling agents simultaneously, wherein the plurality of silane coupling agents comprises: (a) a first silane is an organosilicon having a structure: Z 1 Z 2 Z 3 Si(CH 2 ) y X(CH 2 ) y Si Z 1 Z 2 Z 3 , wherein X is a polysulfide, wherein Y is an integer equal to or greater than 1; and wherein Z 1 , Z 2 , and Z 3 are each independently selected from the group consisting of hydrogen, alkoxy, halogen, and hydroxyl, and (b) a second silane is an organo silane having a structure wherein: 1. X is a functional group selected from the group consisting of: a hydrogen, an amino group, a polyamino alkyl group, a mercapto group, a thiocyanato group, an epoxy group, a vinyl group, a halogen, an acryloxy group and a methacryloxy group; 2. Y is an integer equal to or greater than 0; and 3. Z 1 , Z 2 , and Z 3 are each independently selected from the group consisting of hydrogen, alkoxy, halogen, and hydroxyl, and combinations thereof; and (c) a third silane can be added simultaneously forming the high loaded silica masterbatch.