Method for treating polyesters and, in particular, cleaning and

Details Method for treating polyesters and, in particular, cleaning and Method for treating polyesters and, in particular, cleaning and

1998-10-01

2000-11-14

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...

C08J 1104

Patent

active

061471291

ABSTRACT:
A method for treating polyesters comprises combining discrete particles of a polyester with an alkaline composition such that the alkaline composition coats the polyester particles. The particles are then heated in an environment that is at least substantially free of water. The method can be effectively used in cleaning, decontaminating and even increasing the intrinsic viscosity of polyester materials. Moreover, when used in the recovery of polyester materials containing contaminants and/or impurities, the method can provide a superior polyester product both in terms of intrinsic viscosity and color.

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