Material for extrusion molding and process for preparation of mo

Details Material for extrusion molding and process for preparation of mo Material for extrusion molding and process for preparation of mo

1992-08-17

1994-03-08

Teskin, Fred

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

528502, 528503, 5263472, 524577, 525241, 2641771, 26417717, 2641772, 26433117, 264345, 264348, B29B 906, C08L 2504

Patent

active

052925870

ABSTRACT:
Disclosed are a material for extrusion molding comprising a styrene-based polymer having a high degree of syndiotactic configuration, a melt viscosity of 10.sup.3 to less than 10.sup.6 poise measured at 300.degree. C. and a shearing rate of 10/sec, and a crystallinity of 15% or more, a process for preparation of the said material and a process for preparation of a molding product therefrom.
The molding product prepared according to the present invention has excellent properties such as heat resistance and chemical resistance.

REFERENCES:
patent: 3010935 (1961-11-01), Donald
patent: 4959435 (1990-09-01), Seitz et al.
patent: 5006296 (1991-04-01), Pedersen
Chemical Abstracts, vol. 108, 1988, p. 49, abstract No. 151651n for JP 62-257950.
Spencer et al, "The Viscous Flow of Molten Polystyrene . . . ", Journal of Colloid Sci., vol. 4, 241 (1949).

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