Title:
METHOD OF REGENERATING THERMOSET EPOXY RESIN AND COMPOSITION FOR REGENERATION OF THERMOSET RESIN
Document Type and Number:
WIPO Patent Application WO/2010/050442
Kind Code:
A1
Abstract:
A method comprising: a step in which a resinous structure comprising a thermoset epoxy resin having ester bonds and at least one member selected from inorganic fibers and an inorganic filler is treated with a supercritical or subcritical alcohol in the absence of any catalyst to selectively cleave the ester bonds of the thermoset epoxy resin and thereby decompose the thermoset epoxy resin; a step in which the decomposition products are separated into liquid matter and the inorganic fibers and/or inorganic filler; a step in which the alcohol is removed from the separated liquid matter to recover a decomposed epoxy resin; and a step in which the decomposed epoxy resin recovered is reacted with a hardener to produce a re-cured resin, the hardener being used in an amount of 25-55 mass% relative to the sum of the decomposed epoxy resin and the hardener. By this method, a thermoset epoxy resin can be decomposed at a relatively low temperature into components which can be cured again. A re-cured resin equal or superior in strength to the original thermoset epoxy resin is obtained.
Inventors:
OKAJIMA IDZUMI (JP)
SAKO TAKESHI (JP)
SAKO TAKESHI (JP)
Application Number:
PCT/JP2009/068352
Publication Date:
May 06, 2010
Filing Date:
October 26, 2009
Export Citation:
Assignee:
UNIV SHIZUOKA NAT UNIV CORP (JP)
OKAJIMA IDZUMI (JP)
SAKO TAKESHI (JP)
OKAJIMA IDZUMI (JP)
SAKO TAKESHI (JP)
International Classes:
C08J11/24; B01J3/00
Domestic Patent References:
| WO2005092962A1 | 2005-10-06 |
Foreign References:
| JP2001055468A | 2001-02-27 | |||
| JP2006219640A | 2006-08-24 |
Attorney, Agent or Firm:
NAKAJIMA, Jun et al. (JP)
Nakajima 淳 (JP)
Nakajima 淳 (JP)
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