Title:
ヒドロキシ末端直鎖状シロキサンの製造方法
Document Type and Number:
Japanese Patent JP4195226
Kind Code:
B2
Abstract:
A process is disclosed for preparing linear hydroxy end-terminated linear siloxanes comprising the steps of; a) mixing chlorosiloxanes having the formula ClR2SiO(R<1> 2SiO)xSiR2Cl where x is an integer having a value from 1 - 10, each R and R<1> is an independently selected monovalent hydrocarbon group, with volatile methyl siloxanes to form a solution of chlorosiloxanes in volatile methyl siloxanes; b) hydrolyzing the solution of chlorosiloxanes in volatile methyl siloxanes to form a hydrolysis mixture of reaction products; c) separating the hydrolysis mixture of reaction products into an aqueous phase and a siloxane phase comprising hydroxy end-terminated linear siloxanes and volatile methyl siloxanes; and d) recovering the hydroxy end-terminated linear siloxanes from the siloxane phase.
Inventors:
Charles Alan Hall
Dennis Gene Van Kovaring
Dennis Gene Van Kovaring
Application Number:
JP2002043659A
Publication Date:
December 10, 2008
Filing Date:
February 20, 2002
Export Citation:
Assignee:
DOW CORNING CORPORATION
International Classes:
C07F7/08; C07F7/18
Domestic Patent References:
| JP6041153A | ||||
| JP6049078A | ||||
| JP3169885A | ||||
| JP7224072A | ||||
| JP2000143679A | ||||
| JP11240892A | ||||
| JP11180986A |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Shinya Mitsuhiro
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Shinya Mitsuhiro