EP 1042390 A1 20001011 - METHOD FOR PREPARING SILICON WITH HIGH PURITY ESTER FUNCTION
Title (en)
METHOD FOR PREPARING SILICON WITH HIGH PURITY ESTER FUNCTION
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HOCHREINEN SILIKONEN MIT ESTERFUNKTIONEN
Title (fr)
PROCEDE DE PREPARATION DE SILICONES A FONCTION ESTER DE HAUTE PURETE
Publication
Application
Priority
- FR 9802897 W 19981229
- FR 9716677 A 19971230
Abstract (en)
[origin: FR2773164A1] The invention concerns a method for preparing polyorganosiloxanes with high purity ester function (acetoxyalkyl or acetoxyalkenyl) consisting in: hydrosilylation between a hydrogenopolyorganosiloxane oil and an alpha -olefin alcohol; esterification of the resulting hydroxy-alkylated or hydroxy-alkenylated polyorganosiloxane with an acetyl halide; elimination of alpha olefin derivatives and the halohydric acid formed. The resulting polyorganosiloxanes with ester function (acetoxyalkyl or acetoxyalkenyl) have global siloxane alpha olefin unit and/or alpha olefin impurities contents corresponding to a number of alpha olefin groups for 100g of polyorganosiloxane with ester function less than 10<-3>.
IPC 1-7
IPC 8 full level
C08G 77/38 (2006.01); C08L 83/05 (2006.01)
CPC (source: EP US)
C08G 77/38 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
FR 2773164 A1 19990702; FR 2773164 B1 20000317; AU 1971699 A 19990726; EP 1042390 A1 20001011; US 6455641 B1 20020924; WO 9935180 A1 19990715
DOCDB simple family (application)
FR 9716677 A 19971230; AU 1971699 A 19981229; EP 98964535 A 19981229; FR 9802897 W 19981229; US 58259100 A 20000815