Title:
トコフェロールの使用
Document Type and Number:
Japanese Patent JP5718573
Kind Code:
B2
Abstract:
The present invention relates to the use of tocopherol as a co-catalyst in the ring opening polymerisation of cyclic siloxanes. The present invention further relates to a method for manufacturing hydrophilic polysiloxanes, wherein a hydrido-containing cyclic siloxane is reacted with a hydrophilic molecule comprising a carbon-carbon double bond, having the general formula (I) H2C═CH—(CHR)n—O—(CHR1CR2R3)mR4 or (II) H2C═CH—(CHR)n—R5, wherein n is an integer from 0 to 4, m is an integer from 0 to 5, R, R1, R2, R3 and R4 are each independently hydrogen or a C1 to C6 alkyl, R5 is a saturated cyclic hydrocarbon containing carbonyl group, in the presence of a first catalyst to obtain a monomer, and polymerising said monomer in the presence of a second catalyst and tocopherol as a co-catalyst.
Inventors:
Teatinen, Emilia
Yukariinen, Harri
Yukariinen, Harri
Application Number:
JP2009553171A
Publication Date:
May 13, 2015
Filing Date:
March 11, 2008
Export Citation:
Assignee:
Bayer osasuke yuichia
International Classes:
C08G77/08; C08G77/14; C08K5/14; C08L83/06
Domestic Patent References:
| JP2002348379A | ||||
| JP9202829A | ||||
| JP2001278983A | ||||
| JP10279682A | ||||
| JP10279686A |
Foreign References:
| DE19631227C1 | ||||
| US20050090607 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Fukumoto product
Tetsuji Koga
Yoichi Watanabe
Ryotaro Takei
Masaru Nakajima
Takashi Ishida
Fukumoto product
Tetsuji Koga
Yoichi Watanabe
Ryotaro Takei
Masaru Nakajima