C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 83/04 (2006.01) C08G 77/18 (2006.01) C08K 5/09 (2006.01) C08K 5/521 (2006.01) C08K 5/54 (2006.01) C08K 5/544 (2006.01) C09K 3/10 (2006.01)
Patent
CA 2298655
The invention relates to a method for producing organopolysiloxane terminated by organyloxy groups, wherein (A) HO-terminated organopolysiloxane is reacted with (B) alkoxysilane having at least two alkoxygroups and a radical containing at least one secondary or tertiary amino group which is bonded to the silicon atom via a bivalent C1-C12 hydrocarbon radical in the presence of (C) Bronsted or Lewis acid, in addition to RTV-1-alkoxy materials which include the reaction product having organopolysiloxane with organyloxy terminated groups as a main constituent.
L'invention concerne un procédé pour la préparation d'organopolysiloxane terminé par des groupes organiloxy, dans lequel on fait réagir (A) un organopolysiloxane à terminaison HO avec (B) un alcoxysilane possédant au moins deux groupes alcoxy et un reste qui contient au moins un groupe amino secondaire ou tertiaire, lequel est lié à l'atome de silicium par l'intermédiaire d'un reste hydrocarbure C1-12 bivalent, en présence (C) d'acide de Brönstedt ou de Lewis, ainsi que de matières 1-alcoxy résistant aux variations de température, qui comprennent le produit de réaction contenant comme constituant principal un organopolysiloxane terminé par des groupes organiloxy.
Dorsch Norman
Hechtl Wolfgang
Heinrich Rudolf
Oberneder Stefan
Sommer Oswin
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Wacker-Chemie Gmbh
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