发明名称 |
METHOD FOR PREPARING POLYORGANOSILOXANE (POS) BY RING(S)-OPENING POLYMERISATION AND/OR POS REDISTRIBUTION IN THE PRESENCE OF CARBENE(S) AND POS COMPOUNDS PRODUCED BY SAID METHOD |
摘要 |
Production of polyorganosiloxanes (A) by ring-opening polymerization or rearrangement of other polyorganosiloxanes (B) is carried out using a catalyst (I) comprising at least one carbene. Independent claims are included for: (1) compositions for the preparation of (A) as above, comprising one or more linear, branched and/or cyclic starting compounds (B), a catalyst (C) (excluding metal-carbene complexes), optionally solvent(s) and optionally linear polyorganosiloxanes (e.g. polydialkyl siloxanes of degree of polymerization up to 20, preferable disiloxanes such as hexamethyl disiloxane or its vinylated or hydrogenated analog); (2) silicone compositions containing (A), obtained by polymerization and/or rearrangement of (B), and residues of the catalysts (C); (3) silicone compositions containing (A), obtained by ring-opening polymerization and/or rearrangement of (B) (especially cyclic (B)), having a final acyclic to cyclic polyorganosiloxane ratio of more than 85/15 (especially more than 95/5); (4) new polyorganosiloxanes (D) substituted by catalytic functions suitable for generating carbenes; (5) new silanes of formula (OR*) 4-aSi(R c>) a (E); and (6) the use of (I) as catalyst or co-catalyst in the preparation of (A) by polymerization and/or rearrangement of (B). R c>catalytic function suitable for generating a carbene; R* : alkyl; and a : 1-3. |
申请公布号 |
EP1701992(A1) |
申请公布日期 |
2006.09.20 |
申请号 |
EP20040816519 |
申请日期 |
2004.12.08 |
申请人 |
RHODIA CHIMIE;CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) |
发明人 |
BLANC-MAGNARD, DELPHINE;STERIN, SEBASTIEN;FLEURY, ETIENNE;BUISINE, OLIVIER;BACEIREDO, ANTOINE |
分类号 |
C08G77/08 |
主分类号 |
C08G77/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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