Title:
METHOD FOR PRODUCING POLYCARBOSILANE FOR SILICON CARBIDE FIBERS, AND METHOD FOR PRODUCING SILICON CARBIDE FIBERS
Document Type and Number:
WIPO Patent Application WO/2024/095990
Kind Code:
A1
Abstract:
Provided is a method for producing polycarbosilane (PCS) for silicon carbide fibers that produces PCS in a few steps to improve the yield of PCS. The present invention is a method that produces PCS for silicon carbide fibers without including a step that adjusts the molecular weight of the PCS, wherein the method includes (a) a step that heats and gasifies a composition containing a cyclic silane compound in a liquid-phase reactor 1, (b) a step that heats the gaseous composition obtained by step (a) to generate PCS, and (c) a step that returns the PCS generated by step (b) to the liquid-phase reactor 1 and cools and returns the gaseous components to the liquid-phase reactor 1, and each of these steps is repeated to produce PCS in which the number average molecular weight (Mn) is from 1250 to less than 6000 and the ratio (Mw/Mn) of the weight average molecular weight (Mw) and the number average molecular weight (Mn) is from 4.5 to 20.0.
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Inventors:
NAITO RYOTA (JP)
SAITO JUNKI (JP)
IUCHI RYO (JP)
YAMAKAWA KOJI (JP)
GOTO TATSURU (JP)
SAITO JUNKI (JP)
IUCHI RYO (JP)
YAMAKAWA KOJI (JP)
GOTO TATSURU (JP)
Application Number:
PCT/JP2023/039176
Publication Date:
May 10, 2024
Filing Date:
October 31, 2023
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
C08G77/60; D01F9/10
Foreign References:
| JPS6485225A | 1989-03-30 | |||
| JP2019137935A | 2019-08-22 | |||
| JPH04194028A | 1992-07-14 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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