C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
400/9168, 260/44
C07F 7/08 (2006.01) C07F 7/12 (2006.01) C07F 7/18 (2006.01) C08G 75/02 (2006.01) C08G 75/14 (2006.01) C08K 5/54 (2006.01) C08K 5/548 (2006.01)
Patent
CA 1144936
ABSTRACT OF THE DISCLOSURE Bis-(silyl-ethyl)-oligosulphide obtained by reacting a vinyl silane having the formula (CH2=CH)m-SiR?R4-(m+n) wherein R represents chlorine, iodine, C1-C3-alkoxy, 2-methoxy-ethoxy, 2-ethoxy-ethoxy or hydroxy, R1 represents C1-C3-alkyl, phenyl or C5-C7-cycloalkyl, n is 0, 1 or 2, m is 1 or 2 and m + n is 1, 2 or 3, with sulphur and, when required, with hydrogen sulphide in a molar ratio ranging from 1:2.5 to 1:10 and of vinyl silane to hydrogen sulphide from 1:0 to 0:5 at a temperature between approx- imately 100 and 200°C under a pressure ranging from 1 to 25 bars (total pressure at the reaction temperature) and in the presence of Sulphidation catalysts and when required hydrolysis or partial hydrolysis of the reaction product. The corresponding process of production and the use of a bis-(silyl-ethyl)-oligosulphide as a reinforcing additive (adhesion promoter) in a crosslinkable rubber mixture containing a silicate filler and when required carbon black as well as sulphur and other conventional mixture components are also disclosed.
342418
Kleinschmit Peter
Liedtke Christa
Schwarz Rudolf
Wolff Siegfried
Aktiengesellschaft Degussa
Marks & Clerk
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