Patent ID: 7902284

Claim:
A pelletizable composition comprising organosilicon compounds, and aluminum oxide powder with a specific surface area of at least 50 m 2 /g and with an average primary particle size of from 1 to 50 nm, and at least one filler other than aluminum oxide, wherein the organosilicon compounds comprise at least one organosilicon compound containing units of the formula R a R 1 b Y c SiO (4-a-b-c)/2 (I), where R each is identical or different, and is a hydrogen atom or an optionally substituted, SiC-bonded, aliphatically saturated hydrocarbon moiety, R 1 each is identical or different, and is an SiC-bonded, aliphatically unsaturated hydrocarbon moiety, Y each is identical or different, and is a hydroxy moiety or hydrolyzable moiety, a is 0, 1, 2, or 3, b is 0, 1, 2, or 3, and c is 0, 1, 2, or 3, with the proviso that the sum a+b+c is ≦3 and wherein the viscosity of the organosilicon compounds is in the range of 10 6 mPas to 10 9 mPas at 25° C., wherein the aluminum oxide powder is present in an amount of from 0.1 to 20 parts by weight based on 100 parts of the composition, and wherein the composition is pelletizable in the absence of boric acid.