Global patent index - EP 1042390 A1

EP 1042390 A1 2000-10-11 - 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

EP 1042390 A1 (FR)

Application

EP 98964535 A

Priority

  • FR 9802897 W
  • FR 9716677 A

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 (main, further and additional classification)

C08G 77/38

IPC 8 full level (invention and additional information)

C08G 77/38 (2006.01); C08L 83/05 (2006.01)

CPC (invention and additional information)

C08G 77/38 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

FR 2773164 A1 19990702; FR 2773164 B1 20000317; AU 1971699 A 19990726; EP 1042390 A1 20001011; US 6455641 B1 20020924; WO 9935180 A1 19990715

INPADOC legal status

2004-03-03 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030828

2001-01-17 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20001201

2000-10-11 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000607

2000-10-11 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB