Dow Silicones Corporation

Dow Corning Corporation

Marek Cypryk

Richard G Taylor

Avril E Surgenor

Avril Surgenor

A telomerization process is used to prepare a reaction product containing a noncyclic hydrocarbonoxy-functional polyorganosiloxane. The process includes heating a composition including (A) a cyclic polyorganosiloxane, (B) a silane, and (C) a Lewis Acid telomerization catalyst. The cyclic polyorganosiloxane has formula [(RSiO)], where subscript n is an integer of 4 or more, and each Ris independently H, a hydrocarbyl group, or a halogenated hydrocarbyl group. The silane has formula RSi(OR), where subscript m is an integer from 1 to 4, each Ris independently H, a hydrocarbyl group, or a halogenated hydrocarbyl group, and each Ris independently a hydrocarbyl group. The telomerization catalyst is a Lewis Acid of formula [M]+[RSO]where M is a metal atom selected from Aluminum (Al), Bismuth (Bi), Cerium (Ce), Chromium (Cr), Iron (Fe), Gallium (Ga), Indium (In), Lanthanum (La), Scandium (Sc), Samarium (Sm), and Ytterbium (Yb); Ris selected from an oxygen atom (O) and CF; and x represents a number up to a maximum valence of the metal atom selected for M.

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Lodz, Poland

Marek Cypryk