Substantially pure spirobiindane bisphenols and method for their

Details Substantially pure spirobiindane bisphenols and method for their Substantially pure spirobiindane bisphenols and method for their

1986-10-10

1988-12-13

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568721, 568729, C07C 3912

Patent

active

047912340

ABSTRACT:
Spirobiindane bisphenols of high purity, suitable for conversion to high molecular weight polycarbonates, are prepared by reacting a bisphenol or 4-isopropenylphenol with a metal halide Lewis acid or an alkanesulfonic acid, followed by removing impurities including phenols, 1-(4-hydroxyphenyl)indanols and the like. A step of purification by precipitation with water from a methanol-methylene chloride solution is included.

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Baker et al., J. Chem. Soc., 1421 (1939).
Curtis, J. Chem. Soc., 415 (1962).
Stueben, J. Poly. Sci., Part A, 3, 3209 (1965).

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