Title:
METHOD FOR PRODUCING SILICON CARBIDE FIBERS
Document Type and Number:
WIPO Patent Application WO/2024/004230
Kind Code:
A1
Abstract:
The present invention provides a method for producing a polycarbosilane by means of a liquid phase-vapor phase thermal decomposition/condensation process; and this method produces a polycarbosilane for the production of silicon carbide fibers with a smaller number of steps than conventional production methods. A method for producing a polycarbosilane for the production of silicon carbide fibers according to one embodiment of the present invention comprises a polycarbosilane synthesis step for synthesizing a polycarbosilane that has a weight average molecular weight of 9,000 or more, the polycarbosilane synthesis step comprising: a process for producing a vapor phase by heating a starting material that contains a cyclic silane compound at a first temperature; a process for producing a polycarbosilane by heating the vapor phase at a second temperature that is higher than the first temperature; and a process for increasing the molecular weight of the polycarbosilane by cooling the polycarbosilane and returning the cooled polycarbosilane to the starting material so as to have the polycarbosilane heated at the first temperature.
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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/JP2022/041311
Publication Date:
January 04, 2024
Filing Date:
November 07, 2022
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
C08G77/60; D01F9/10
Foreign References:
| JP2019137935A | 2019-08-22 | |||
| JPS6485225A | 1989-03-30 | |||
| JP2000045130A | 2000-02-15 | |||
| JPH11199779A | 1999-07-27 | |||
| JPH06200035A | 1994-07-19 | |||
| JPS5783529A | 1982-05-25 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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