Alkoxysilane double cluster compounds with silicone bridges and their preparation and use

Abstract From the Canadian patent

Novel alkoxysilane cluster compounds are described having the formula:, wherein n is an integer from 0 to 300; R is hydrogen alkyl, alkenyl; aryl, aralkyl or -OSi(OR')3; each R' is independently selected from alkyl, alkenyl aryl or ar-, alkyl with the proviso that at least a majority of R' radicals are sterically hindered alkyl groups having at least 3 carbon atoms; and R" and R''' are independently selected from hydrogen, alkyl, alkenyl, aryl, aralkyl hydroalkyl, and halo or cyano substituted alkyl alkenyl, aryl, ar-, alkyl, and hydroalkyl. The preparation of these alkoxysilane cluster compounds is also described. The compounds are useful in the operation of a fluid operating system which …