Process for making thermoplastic polyester foams

Details Process for making thermoplastic polyester foams Process for making thermoplastic polyester foams

1994-01-18

1994-09-20

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521126, 521182, 528272, 528274, 528277, 528279, 528283, C08G 6300, C08G 6378, C08J 906, C08J 912

Patent

active

053489853

ABSTRACT:
A process for making thermoplastic polyester foams comprises the steps of subjecting macrocyclic polyester oligomer precursors to initiators and blowing agents at a constant operating temperature in order to produce foams which unexpectedly display low foam densities.

REFERENCES:
patent: Re34431 (1993-11-01), Brunelle et al.
patent: 4132707 (1979-01-01), Borman
patent: 4980453 (1990-12-01), Brunelle et al.
patent: 5039783 (1991-08-01), Brunelle et al.
patent: 5136018 (1992-08-01), Boden et al.
patent: 5191013 (1993-03-01), Cook et al.
patent: 5214158 (1993-05-01), Brunelle et al.
patent: 5231161 (1993-07-01), Brunelle et al.

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