Rubber mixtures containing silicic acids with additives containing sulphur

摘要

Rubber blend containing silicic acid produced from at least one rubber, an alkoxysilane containing sulfur, a vulcanizing agent, a filler, optionally other auxiliary products for rubber, comprises 0.1-15 pts. wt. of a polysulfide additive (I), and 0.1-15 pts. wt. of 1.6-bis(N,N-dibenzylthiocarbamoyldithio)hexane. Rubber blend containing silicic acid produced from at least one rubber, an alkoxysilane containing sulfur, a vulcanizing agent, a filler, optionally other auxiliary products for rubber, comprises 0.1-15 pts. wt. of a polysulfide additive of formula (A-S1-(S1) x-S1-Y1-S1-(S) x-S1-A) (I), and 0.1-15 pts. wt. of 1,6-bis(N,N-dibenzylthiocarbamoyldithio)hexane. Y1 : optionally substituted aliphatic, cycloaliphatic or aryl group containing heteroatoms; A : optionally substituted hydroxyethyl group of formula (HO-CH(R1)-CH(R2)-) (II), carboxyaryl group of formula (III) or carboxyaryl group of formula (R1O-C(=O)-(CH-(R6)) y-CH(R2)-) (IV); R1, R2, R6 : H, 1-6C-alkyl, 5-6C-cycloalkyl, 6-10C-aryl, -CH 2-OR5, -CH 2-CH 2-OR5, -NHR5, -COR5, -COOR5, or -CH 2COOR5; R3 : H, 1-6C-alkyl, 5-6C-cycloalkyl, 6-10C-aryl, -CH 2-OR5, -CH 2-CH 2-OR5, -NHR, -COR5, -COOR5, or -CH 2COOR5; R5 : H, 1-6C-alkyl, 5-6C-cycloalkyl, 6-10C-aryl or 1-6C-acyl; x : 0-2; and y : 0-2. Independent claims are included for: (1) preparing the rubber blend containing silicic acid, comprising mixing steps, where a first mixing step comprises mixing the rubbers, one or more hydroxyl group-containing oxidic fillers, the sulfur-containing alkoxysilanes, one or more vulcanization additives, one or more rubber additives, (I) and 1,6-bis (N,N-dibenzylthiocarbamoyldithio)hexane; and (2) an additive-mixture comprising (I) and 1,6-bis (N, N-dibenzylthiocarbamoyldithio)hexane. [Image].