Evonik Operations Gmbh

Evonik Degussa Gmbh

Frank Forster

Caren Roeben

Andre Hasse

Alexander Koepfer

Ralph Moser

Stefanie Mayer

Caren Röben

Sebastian Rosenstingl

Sascha Erhardt

Alexander Köpfer

Caren RÖBEN

The invention relates to silane mixtures comprising a silane of the formula I((R)(R)Si&#x2014;R&#x2014;SH&#x2003;&#x2003;(I)and a silane of the formula II(R)(R)Si&#x2014;R&#x2014;(S&#x2014;R)&#x2014;Si(R)(R)&#x2003;&#x2003;(II)where the molar ratio of silane of the formula I to silane of the formula II is 20:80-85:15. The silane mixture according to the invention can be prepared by mixing the silanes of the formula I and silanes of the formula II.

Silane mixtures and process for preparing same

The invention relates to silane mixtures comprising a silane of the formula I(R)(R)Si&#x2014;R&#x2014;(S&#x2014;R)&#x2014;S&#x2014;R&#x2003;&#x2003;(I)and a silane of the formula II(R)(R)Si&#x2014;R&#x2014;Si(R)(R)&#x2003;&#x2003;(II)where the molar ratio of silane of the formula I to silane of the formula II is 15:85-90:10. The silane mixture according to the invention can be prepared by mixing the silanes of the formula I and silanes of the formula II.

The invention relates to silane mixtures comprising a silane of the formula I(R)(R)Si&#x2014;R&#x2014;(S&#x2014;R)&#x2014;S&#x2014;R&#x2003;&#x2003;(I)and a silane of the formula II(R)(R)Si&#x2014;R&#x2014;S&#x2014;R&#x2014;S&#x2014;R&#x2014;Si(R)(R)&#x2003;&#x2003;(II)where the molar ratio of silane of the formula I to silane of the formula II is 15:85-90:10. The silane mixture according to the invention can be prepared by mixing the silanes of the formula I and silanes of the formula II.

The invention relates to rubber mixtures, said rubber mixtures comprising (a) at least one rubber, excluding silicone rubber, chloroprene rubber, bromobutyl rubber, fluoro rubber and nitrile rubber, The rubber mixture is produced by mixing the rubber, silane of general formula (I), amine compound and bifunctional silane.

Rubber mixtures

The invention relates to silane mixtures comprising a silane of the formula I(R)(R)Si&#x2014;R&#x2014;(S&#x2014;R)&#x2014;S&#x2014;(R&#x2014;S)&#x2014;R&#x2014;Si(R)(R)&#x2003;&#x2003;(I)and a silane of the formula II(R)(R)Si&#x2014;R&#x2014;(S&#x2014;R)&#x2014;S&#x2014;R&#x2014;Si(R)(R)&#x2003;&#x2003;(II)where the molar ratio of silane of the formula I to silane of the formula II is 19:81-81:19. The silane mixture according to the invention can be prepared by mixing the silanes of the formula I and silanes of the formula II.

Silane mixtures and processes for preparation thereof

The invention relates to silane mixtures comprising a silane of the formula I(R)(R)Si&#x2014;R&#x2014;(S&#x2014;R)&#x2014;S&#x2014;R&#x2003;&#x2003;(I)and a silane of the formula II(R)(R)Si&#x2014;R&#x2014;(S&#x2014;R)&#x2014;S&#x2014;R&#x2014;Si(R)(R)&#x2003;&#x2003;(II)where the molar ratio of silane of the formula I to silane of the formula II is 20:80-90:10. The silane mixture according to the invention can be prepared by mixing the silanes of the formula I and silanes of the formula II.

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 orin 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)NaS&#x2003;&#x2003;(V)orin 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)NaS&#x2003;&#x2003;(V).

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Schoellkrippen, Germany

Frank Forster