Increasing the molecular weight of polyesters and premix useful

Details Increasing the molecular weight of polyesters and premix useful Increasing the molecular weight of polyesters and premix useful

1997-07-11

1998-05-05

Gulakowski, Randy

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525444, 525506, 525533, 525538, 528 89, 528 99, 528100, 528176, 528194, 528275, 528286, 528287, C08F28300, C08G 7902, C08L 8502

Patent

active

057476063

ABSTRACT:
An increase in the molecular weight of polyester and recycled polyester can be achieved by blending said polyester with a difunctional epoxy resin and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half-ester and heating the blend to above the melting point (glass transition temperature) of the polyester.

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