Produce new 4,4'-dihydroxyphenyl bicyclohexenes that are useful as a material for liquid crystal polyester, polycarbonate, polyurethane or other synthetic resins or for photoresist used with display elements, semiconductors, etc., by thermally decomposing 4,4,4'4'-tetrahydroxyphenyl bicyclohexanes, preferably in the presence of alkali catalyst.

 
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> Process for producing foamed body of thermoplastic resin, mold for forming same and foamed body of thermoplastic resin

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