Abstract: Azocarbonyl-functionalized silanes of formula I (R1)3-a(R2)aSi—R1—NH—C(O)—N?N—R4??(I) and methods for their production are provided. The silanes of formula (I) are useful in rubber mixtures to provide moldings having improved tear-resistance.

Abstract: The invention relates to the use of silane-modified polybutadienes in rubber mixtures, in particular for improving the rolling resistance of diene rubber tires. In particular, the invention is directed to silane-modified polybutadienes in rubber mixtures, wherein the polybutadiene comprises the 1,3-butadiene-derived monomer units and wherein the proportion of A in the entirety of the 1,3-butadiene-derived monomer units present in the polybutadiene is from 10 to 60 mol %, and wherein the sum of the proportions of B and C in the entirety of the 1,3-butadiene-derived monomer units present in the polybutadiene is from 40 to 90 mol %.

Abstract: The invention relates to a plastics-covered mercaptosilane-wax mixture, where the plastic of the plastics covering is selected from the group of polypropylene, polyethylene, ethylene-vinyl acetate copolymer and mixtures of the abovementioned plastics with melting point from 70 to 170° C., and the mercaptosilane-wax mixture comprises at least one mercaptosilane of the general formula I and at least one wax with congealing point from 30 to 160° C. The plastics-covered mercaptosilane-wax mixture can be used in rubber mixtures.

Abstract: The invention relates to urea-containing silanes of the formula I which are prepared by reacting urea-containing disulphide silanes of the formula II with sulphur or in a first step, reacting an aminosilane of the formula III with an isocyanate of the formula IV and, in a second step, reacting the product from the first process step with sodium polysulphide of the formula (V) Na2Sx??(V) or in a first step, reacting an isocyanatosilane of the formula VII with an amine of the formula VIII and, in a second step, reacting the product from the first process step with sodium polysulphide of the formula (V) Na2Sx??(V).

Abstract: The invention relates to a process for preparing urea-containing mercaptosilanes of the general formula I wherein a chlorosilane of the general formula II is reacted with NaSH in C2-C8 alcohol.

Abstract: The invention relates to urea-containing mercaptosilanes of the formula I which are prepared by reacting a halosilane of the formula II with compounds of the formula III in an alcohol.

Abstract: The invention relates to urea-containing silanes of the formula I which are prepared by, in a first step, reacting an aminosilane of the formula II with an isocyanate of the formula III and, in a second step, reacting the product from the first process step with sodium sulphide of the formula IV Na2S??(IV) or in a first step, reacting an isocyanatosilane of the formula VI with an amine of the formula VII and, in a second step, reacting the product from the first process step with sodium sulphide of the formula IV Na2S??(IV).

Abstract: The invention relates to a process for preparing urea-containing silanes of the general formula I wherein a diamine of the general formula II H2N—R—S—S—R—NH2??(II) is reacted with isocyanatosilane of the general formula III (R1)3Si—R—NCO??(III) in water.

Abstract: Azocarbonyl-functionalized silanes of formula I (R1)3-a(R2)aSi—R1—NH—C(O)—N?N—R4 ??(I) and methods for their production are provided. The silanes of formula (I) are useful in rubber mixtures to provide moldings having improved tear-resistance.