| 摘要 |
A sulfEdosilane of the Formula (1) wherein each R, which may be the same or different, represents an alkyl or aryl group having 1 to 18 carbon atoms, R' represents an alkyl, hydroxyalkyl, or alkoxyalkyl group having 1 to 8 carbon atoms, each A independently represents the same or different divalent organic group having 1 to 18 carbon atoms and x has a value in the range 2 to 10... A coupling agent composition comprising sulfidosilanes of the formula Y'Y2Si-A-Sx-A-SiY2Y' wherein each Y is selected from alkyl or aryl groups having 1 to 18 carbon atoms and alkoxy groups having 1 to 8 carbon atoms, each Y' is selected from hydroxyl or alkoxy, hydroxyalkoxy, or alkoxyalkoxy groups having 1 to 8 carbon atoms, each A independently represents the same or different divalent organic group having 1 to 18 carbon atoms and x has an average value in the range 2 to 5 characterized in that the average number of alkoxy groups per sulfEdosilane molecule is less than 2 and at least 0.1 % by weight of the sulfidosilane in the composition A process for the preparation of a coupling agent composition comprising sulphidosilanes of the Formula Y'R2Si-A-Sx-A-SiR2Y' wherein each R is selected from alkyl or aryl groups having 1 to 18 carbon atoms, each Y' is selected from hydroxyl and alkoxy, hydroxyalkoxy, or alkoxyalkoxy groups having 1 to 8 carbon atoms, each A independently represents the same or different divalent organic group having 1 to 18 carbon atoms and x has an average value in the range 2 to 5, by reacting an aqueous phase comprising a sulfide compound, which is a polysulfide of the formula M2Sx and/or a mixture of sulfur with a hydrosulfide of the formula MHS or a sulfide of the formula M2Sn, where M represents ammonium or an alkali metal, x is defined as above and n has an average value of 1 to 5, with an alkoxydialkylhaloalkylsilane of the formula (R'O)R2Si-A-Z, where R and A are defined as above, R' represents an alkyl, hydroxyalkyl, or alkoxyalkyl group having 1 to 8 carbon atoms and Z represents a halogen selected from chlorine, bromine and iodine, in the presence of a phase transfer catalyst under conditions such that some partial hydrolysis of alkoxysilane groups takes place to produce a coupling agent product containing a sulfidosilane.
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