Method of making polycarbonate prepolymer and method of making h

Details Method of making polycarbonate prepolymer and method of making h Method of making polycarbonate prepolymer and method of making h

1997-04-08

1999-01-26

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

058640061

ABSTRACT:
Polycarbonate prepolymer is crystallized using a water and solvent mixture, or by application of a shear force while heating, or by orientation of the prepolymer with a shear force followed by a temperature hold. High molecular weight polycarbonate is obtained by the solid state reaction of the crystallized prepolymer.

REFERENCES:
patent: 4948871 (1990-08-01), Fukuoka, et al.
patent: 5191001 (1993-03-01), Kuhlig, et al.
patent: 5204377 (1993-04-01), Fukawa, et al
patent: 5214073 (1993-05-01), Fukawa, et al.
patent: 5225526 (1993-07-01), Fukawa, et al.
patent: 5266659 (1993-11-01), Sivaram, et al.

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