Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1992-07-09
1994-04-19
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528219, 525523, 525534, 568720, 568723, 549514, 549517, C08G 5900
Patent
active
053046242
ABSTRACT:
A method for preparing 1,1,2,2-tetrakis(4-hydroxy-3,5-dimethylphenyl)ethane (TKXE) comprising subjecting two molecules of bis(3,5-dimethyl-4-hydroxyphenyl) methane to dehydration-condensation under oxidizing conditions, an epoxy resin prepared by epoxidating TKXE obtained by the method and an epoxy resin composition comprising TKXE obtained by the method as a hardener and an epoxy resin as well as methods for preparing the resin and composition. The method makes it possible to prepare highly pure TKXE in the form of crystals. Moreover, the epoxy resin and the epoxy resin composition can provide hardened products excellent in physical properties such as heat resistance and mechanical strength.
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Iimuro Shigeru
Ito Mizuo
Koike Naru
Bleutge John C.
Gulakowski Randy
Mitsui Toatsu Chemicals Incorporated
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