Mixtures of cyclic oligocarbonates and their manufacture

Details Mixtures of cyclic oligocarbonates and their manufacture Mixtures of cyclic oligocarbonates and their manufacture

1997-11-24

1998-07-28

Mosley, Terressa

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528198, C08G 6400

Patent

active

057864403

ABSTRACT:
A process for the manufacture of cyclic oligocarbonate is disclosed. The process comprises a reaction of a bis-chlorocarbonic acid ester with isatinbisphenol or with a bis-chlorocarbonic ester thereof. The mixture of cyclic oligocarbonates thus prepared is useful as a precursor in the preparation of modified polycarbonate or polyester resins.

REFERENCES:
patent: 4755586 (1988-07-01), Shannon et al.
patent: 4888411 (1989-12-01), Shannon et al.
patent: 4972039 (1990-11-01), Shannon et al.

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