Title:
METHOD FOR PRODUCING ONE-END-FUNCTIONAL ORGANOPOLYSILOXANE AND ONE-END-FUNCTIONAL ORGANOPOLYSILOXANE COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/195358
Kind Code:
A1
Abstract:
The present invention relates to a method for producing a one-end-functional organopolysiloxane represented by general formula (1) (the R1 moieties are each independently an alkyl group or a phenyl group and A is a hydrogen atom or a group represented by general formula (2) (Y is a single bond or a divalent organic group and the wavy line indicates a bond) or general formula (3) (R is a hydrogen atom or a methyl group, and Y and the wavy line are the same as defined above) from a cyclopolysiloxane having 3-5 silicon atoms as a starting material, wherein the reaction liquid being polymerized is analyzed for conversion by near-infrared spectroscopy and the reaction is terminated at the time when the conversion has reached 60-95%. Thus, the reaction is terminated at the optimal conversion when producing a one-end-functional organopolysiloxane, thereby obtaining a one-end-functional organopolysiloxane having a high purity.
Inventors:
HASHIMOTO RYOTA (JP)
OKAMURA KAORU (JP)
TOYODA KEN (JP)
OKAMURA KAORU (JP)
TOYODA KEN (JP)
Application Number:
PCT/JP2023/011797
Publication Date:
October 12, 2023
Filing Date:
March 24, 2023
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C08G77/20; C07F7/12; C08G77/38
Foreign References:
| JPH07292109A | 1995-11-07 | |||
| JPH06340743A | 1994-12-13 | |||
| JPH107801A | 1998-01-13 | |||
| JP2001081180A | 2001-03-27 | |||
| JP2017537993A | 2017-12-21 | |||
| JP2006062994A | 2006-03-09 |
Attorney, Agent or Firm:
YOSHIMIYA Mikio et al. (JP)
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