Patent ID: 6211345
Filing Date: 2001-04-03
Classification: C07F

Abstract:
A process for preparing a reaction mixture containing a sulfur containing norbornanyl silicon compound characterized by the following structure (Formula I):[S.sub.y --R].sub.n --SiX.sub.4-n Formula Iwherein each X is chosen from monovalent hydrocarbon groups or hydrolyzable groups; y is 1 to 5, when y is 1 the compound is an episulfide, and when y is 2 to 5 the sulfur atoms form a polysulfide wherein each sulfur atom is bonded to another sulfur atom and the terminal valences of the polysulfide are bonded to vicinal carbon atoms; n is 1, 2 or 3; R is a polyvalent polycycloaliphatic hydrocarbon radical, the process comprising:reacting sulfur with an unsaturated silicon compound of the formula[R.sup.3 ].sub.n --SiX.sub.4-n (Formula Va)where R.sup.3 is a polycycloaliphatic group containing at least one reactive strained double bond and each X is as defined for Formula I above,the sulfur and silicon compound being reacted in the presence of an acid catalyst.