Copolymers, devoid of rubber, with low residual monomer...

Details Copolymers, devoid of rubber, with low residual monomer... Copolymers, devoid of rubber, with low residual monomer...

2006-12-26

2006-12-26

Teskin, Fred (Department: 1713)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C528S481000, C159S017100, C159S026100, C159S027100

Reexamination Certificate

active

07153929

ABSTRACT:
Rubber-free copolymers of unsaturated monomers selected from the group comprising styrenes and vinyl cyanides are disclosed. The copolymers that contain 65 to 80 wt. %, of styrene and 20 to 35 wt. % of acrylonitrile are characterized in their low content of residual monomers and improved physical properties. Also disclosed are a process and a device for the preparation of these copolymers.

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Vakuum in Forschung und Praxis, (month unavailable) 1998, Nr. 4, pp. 285-293, “Statische Vakuumentgasungs-apparate bei der Herstellung und Qualitätserhöhung von Kunststoffen” by J. E. Juvet und F. A. Streiff.

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