公开(公告)号：WO2022103908A1

公开(公告)日：2022-05-19

申请号：PCT/US2021/058886

申请日：2021-11-11

Applicant: DOW SILICONES CORPORATION

Inventor： FROESCHLE, Kalyn ,  NATTERODT, Jens ,  FREUDENBERGER, Rainer ,  PEITZ, Thomas ,  ROMAIN, Roger ,  SIEBMANN, Ruediger

IPC: C08J3/20 ,  C08J3/205 ,  B29B7/74 ,  B29B7/88 ,  B29B7/84 ,  B29C48/40 ,  B29B7/007 ,  B29B7/325 ,  B29B7/48 ,  B29B7/7461 ,  B29B7/7495 ,  B29B7/826 ,  B29B7/845 ,  B29B7/86 ,  B29B7/90 ,  C08J2383/07 ,  C08J3/201 ,  C08J3/203

Abstract: A process for the continuous preparation of silicone rubber base compositions using an in situ silica treatment and twin-screw extruder technology comprising (a) introducing a hydrophobing treating agent (C), a diorganopolysiloxane containing at least two alkenyl and/or alkynyl groups, and optionally water into a first static mixer and then introducing it in a first twin-screw extruder; (b) adding reinforcing silica filler at a temperature of 20-80°C and providing at least one vent to the atmosphere up and/or downstream of the reinforcing silica filler (B) entry port to allow gases present to escape; (c) mixing in the extruder; (d) further mixing in a residence zone; (e) vacuum stripping at a temperature of at least 100°C; and (f) introducing component (C) either into the twin-screw extruder between steps (c) and (d) and/or during step (d) to dilute and further hydrophobically treat silica. Also resulting compositions produced therefrom.

公开(公告)号：WO2019024432A1

公开(公告)日：2019-02-07

申请号：PCT/CN2018/000279

申请日：2018-07-31

Applicant: DOW SILICONES CORPORATION ,  GAO, Jianjun ,  FREUDENBERGER, Rainer ,  HEIDENFELDER, Franz ,  SIEBMANN, Ruediger ,  FROESCHLE, Kalyn ,  CLEMENTS, Travis L.

Inventor： GAO, Jianjun ,  FREUDENBERGER, Rainer ,  HEIDENFELDER, Franz ,  SIEBMANN, Ruediger ,  FROESCHLE, Kalyn ,  CLEMENTS, Travis L.

IPC: C08G77/06 ,  B29C47/08 ,  B29C47/92

Abstract: Provided are an assembly and process for the continuous or semi-continuous preparation of addition-crosslinking liquid silicone rubbers and to liquid silicone rubber compositions made therefrom. Also disclosed are articles made from the liquid silicone rubber compositions.

公开(公告)号：WO2019023841A1

公开(公告)日：2019-02-07

申请号：PCT/CN2017/095152

申请日：2017-07-31

Applicant: DOW SILICONES CORPORATION ,  GAO, Jianjun ,  FREUDENBERGER, Rainer ,  HEIDENFELDER, Franz ,  SIEBMANN, Ruediger ,  FROESCHLE, Kalyn ,  CLEMENTS, Travis L.

Inventor： GAO, Jianjun ,  FREUDENBERGER, Rainer ,  HEIDENFELDER, Franz ,  SIEBMANN, Ruediger ,  FROESCHLE, Kalyn ,  CLEMENTS, Travis L.

IPC: B29C47/08 ,  B29C47/92 ,  C08G77/06

Abstract: Provided are an assembly and a process for the continuous preparation of addition-crosslinking liquid silicone rubbers and liquid silicone rubber compositions made therefrom. Also disclosed are articles made from the liquid silicone rubber compositions.