发明名称 |
Telomerisation Of Cyclic Polyorganosiloxanes |
摘要 |
A telomerisation 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 telomerisation catalyst. The cyclic polyorganosiloxane has formula [(R12SiO)2/2]n, where subscript n is an integer of 4 or more, and each R1 is independently H, a hydrocarbyl group, or a halogenated hydrocarbyl group. The silane has formula R2(4-m)Si(OR3)m, where subscript m is an integer from 1 to 4, each R2 is independently H, a hydrocarbyl group, or a halogenated hydrocarbyl group, and each R3 is independently a hydrocarbyl group. The telomerisation catalyst is a Lewis Acid of formula [M]x+[R4S03−]X 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); R4 is selected from an oxygen atom (O) and CF3; and x represents a number up to a maximum valence of the metal atom selected for M. |
申请公布号 |
US2016145395(A1) |
申请公布日期 |
2016.05.26 |
申请号 |
US201414900218 |
申请日期 |
2014.06.20 |
申请人 |
DOW CORNING CORPORATION |
发明人 |
Surgenor Avril;Taylor Richard;Cypryk Marek |
分类号 |
C08G77/04 |
主分类号 |
C08G77/04 |
代理机构 |
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代理人 |
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主权项 |
1. A process for preparing a reaction product comprising a noncyclic hydrocarbonoxy-functional polyorganosiloxane comprises:
(1) heating a composition comprising:
(A) a cyclic polyorganosiloxane of formula [(R12SiO)2/2]n, where subscript n is an integer of 4 or more, and each R1 is independently H, a hydrocarbyl group, or a halogenated hydrocarbyl group;(B) a silane of formula R2(4-m)Si(OR3)m, where subscript m is an integer from 1 to 4, each R2 is independently H, a hydrocarbyl group, or a halogenated hydrocarbyl group, and each R3 is independently a hydrocarbyl group; and(C) a Lewis Acid telomerisation catalyst of formula [M]x+[R4SO3−]x 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); R4 is O or CF3; and x represents a number up to a maximum valence of the metal atom selected for M. |
地址 |
Midland MI US |