Styrene polymer molding material and process for preparing same

Details Styrene polymer molding material and process for preparing same Styrene polymer molding material and process for preparing same

1990-05-14

1993-02-02

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526346, 528503, 524120, 524577, 525241, 2642101, 26433117, C08L 2504

Patent

active

051838710

ABSTRACT:
Disclosed are a styrene polymer molding material which has a high degree of syndiotacticity, a weight average molecular weight of 50,000 or more, and at least one melting points of 285.degree. C. or higher, and a process for producing the same by melting a styrene polymer having a high degree of syndioacticity and then molding it under a stress of 1.times.10.sup.6 dyne/cm.sup.2 or higher.
The styrene polymer molding material of the present invention has excellent heat resistance. In addition, according to the process of the present invention, the above polymer molding material having excellent heat resistance can be prepared by a simple operation, and thus has marked advantages for practical use.

REFERENCES:
patent: 4680353 (1987-07-01), Ishihara et al.
patent: 5006296 (1991-04-01), Pedersen
Structure and Properties of Polymers, Boenig, Wiley and Sons, N.Y., 195 (1973).
Tadmor et al., Principles of Polymer Processing, Wiley-Interscience, N.Y., 64-5, 1979.

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