Purification of polycarbonate, polyester carbonate or polyester

Details Purification of polycarbonate, polyester carbonate or polyester Purification of polycarbonate, polyester carbonate or polyester

1992-10-08

1993-05-25

Anderson, Harold D.

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

Synthetic resins

Process of treating scrap or waste product containing solid...

521 48, 528499, 528502, C08J 1104

Patent

active

052140725

ABSTRACT:
A process for the purification of waste of thermoplastic resins containing at least one member selected from among aromatic polycarbonates, aromatic polyester carbonates and aromatic polyesters and at least one of aluminum, lacquers and dyes which waste accumulates in the production of optical moldings is disclosed. The process which entails size reduction of the waste, chemical wash and filtering steps yields purified resins suitable for thermoplastic processing.

REFERENCES:
patent: 5151452 (1992-09-01), Fennhoff et al.

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