Process for preparation of polycarbonate copolyester diols

Details Process for preparation of polycarbonate copolyester diols Process for preparation of polycarbonate copolyester diols

1997-11-20

1999-07-27

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, C08G 6300

Patent

active

059291931

ABSTRACT:
The invention describes a process for the preparation of polycarbonate copolyester diols with a molecular weight ranging between 1000 and 6000 units having the following general formula: ##STR1## wherein the polycarbonate or polyether polycarbonate diol units ##STR2## represent a proportion of between 30 and 70% by weight of the whole polycarbonate or polyether carbonate co-polyester diol

REFERENCES:
patent: 4816529 (1989-03-01), Harris
patent: 4990578 (1991-02-01), Greco et al.
patent: 5116929 (1992-05-01), Greco et al.
patent: 5288839 (1994-02-01), Greco

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