The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2018
Filed:
Jun. 20, 2014
Dow Corning Corporation, Midland, MI (US);
Dow Silicones Corporation, Midland, MI (US);
Abstract
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.