Process for the chemical recycling of polycarbonates

Details Process for the chemical recycling of polycarbonates Process for the chemical recycling of polycarbonates

1996-06-18

1997-07-29

Michl, Paul R.

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

Synthetic resins

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

521 485, 528185, 528196, 528206, 528480, C08J 1118, C08F 600

Patent

active

056522754

ABSTRACT:
The invention relates to a process for the chemical recycling of polycarbonates by catalyzed reaction with diaryl carbonates to oligocarbonates which are crystallized, purified and then polycondensed back to polycarbonates, insoluble constituents optionally being removed before the crystallization step.

REFERENCES:
patent: 5373082 (1994-12-01), Kauth et al.
patent: 5420241 (1995-05-01), Fennhoff et al.

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