Process for lowering the melt viscosity of aromatic polycarbonat

Details Process for lowering the melt viscosity of aromatic polycarbonat Process for lowering the melt viscosity of aromatic polycarbonat

1989-08-15

1991-02-05

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

525439, 528196, 528481, 528487, 528491, 528497, 528498, C08G 6364, C08G 6391

Patent

active

049905953

ABSTRACT:
By treating aromatic polycarbonates, aromatic polyester carbonates and aromatic and/or araliphatic polyesters in the molten state with super-critical gases or gas mixtures under pressure, the melt viscosity of these polymers is considerably lowered so that basic chemical operations which proceed only incompletely under the usual conditions can be carried out on these thermoplasts.

REFERENCES:
patent: 4252968 (1981-02-01), Govoni et al.

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