Modifier For Epoxy Resin CAS 3236-71-3 Fluorene-9-bisphenol

Fluorene-9-bisphenol(CAS NO 3236-71-3)

Specification:

Preparation:

Abstract of A polyalkylene glycol is added to a reaction mixture obtained by a condensation reaction of fluorenone with phenol in the presence of ss-mercaptopropionic acid and HCl gas, excess phenol is then distilled off, and the residue is crystallised out from a solvent which is miscible with the polyalkylene glycol used. After recrystallisation and treatment with water, fluorene-9-bisphenol is obtained in the form of a white crystalline product in a purity of above 99%.

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