Patent ID: 8741987

Claim:
A polymer silica masterbatch comprising: a. a latex of a natural or a synthetic polymer; b. 0.1 weight percent to 10 weight percent of a nanomaterial comprising a nanotube, a nanorod, a nanoribbon and mixtures thereof to form a density from 0.3 grams per cubic centimeter to 1.4 grams per cubic centimeter of a final material; and c. 5 weight percent to 80 weight percent of a compatibilized silica with 0.1 weight percent to 25 weight percent of a plurality of silane coupling agents chemically bound to its surface wherein the silanes are present as an average tetrameric structure having a T.sup.3/T.sup.2 ratio of 0.75 or greater as measured by NMR and wherein the plurality of silane coupling agents comprises: (i) a first silane comprising an organosilicon having a structure: Z 1 Z 2 Z 3 Si(CH 2 ) y X(CH 2 ) y SiZ 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 (ii) a second silane comprising an organosilicon having a structure wherein: 1. X is a functional group selected from the group consisting of: 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.