Title:
シラノール停止オリゴマー材料の製造法
Document Type and Number:
Japanese Patent JP4147115
Kind Code:
B2
Abstract:
A process for the production of linear silanol stopped siloxanes comprising: a) conducting a ring opening polymerization of a hexaorganocyclotrisiloxane having the formula:where R1 and R2 are independently selected from the group of one to forty carbon atom monovalent radicals, in a solvent comprising a mixture of water and a volatile polar aprotic organic solvent in the presence of catalytic amounts of a strong base; b) neutralizing the catalytic amount of the strong base with a partially neutralized salt of a polybasic acid wherein the pH ranges from about 6 to about 8; and c) washing with water.
Inventors:
Gauche, Nancy Yee
Lassano, John Es
Rubinstein, Slavomir
Lassano, John Es
Rubinstein, Slavomir
Application Number:
JP2002589490A
Publication Date:
September 10, 2008
Filing Date:
January 23, 2002
Export Citation:
Assignee:
Momentive Performance Materials, Inc.
International Classes:
C08G77/06; C08G77/16; C07F7/08; C07F7/21
Domestic Patent References:
| JP9132644A | ||||
| JP7216091A | ||||
| JP5194557A | ||||
| JP8176305A | ||||
| JP6220196A | ||||
| JP1272633A |
Attorney, Agent or Firm:
Kazuko Fujita
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