Extrusion-molded article having good thermal stability

Details Extrusion-molded article having good thermal stability Extrusion-molded article having good thermal stability

1974-06-10

1976-06-15

Van Balen, William J.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

260 75T, 428333, 428338, 428339, 428480, F16L 912

Patent

active

039638448

ABSTRACT:
A thermally stable extrusion-molded article characterized by (1) consisting of a substantially linear polyester in which at least 90 mol% of the total recurring units consist of tetramethylene 2,6-naphthalate units, (2) having a density not in excess of 1.318, and (3) being in the unstretched state.
This article is prepared by extruding a melt of a substantially linear polyester in which at least 90 mol% of the total recurring units consist of tetramethylene 2,6-naphthalate units into the form of a molded structure, and cooling the extruded molded structure to room temperature, wherein during the period in which the extruded molded structure is cooled from at least 75%C. to room temperature, the cooling of the molded structure is performed rapidly so that the density of the molded structure does not exceed 1.318.

REFERENCES:
patent: 3466348 (1969-09-01), Wiener
patent: 3637910 (1972-01-01), Shima et al.
patent: 3683060 (1972-08-01), Tanabe et al.
patent: 3816486 (1974-06-01), Vail
Jackson, Winston J. et al., Poly(tetramethylene terephthalate) and poly(tetramethylene naphthalenedicarboxylate) moldings, Polymer Science & Technology-P, (vol. 9 No. 7).
Kuhfuss, Herbert F., et al. Asbestos-reinforced poly(tetramethylenedicarboxylate) moldings, Polymer Science & Technology-P, (vol. 9 No. 7).
Duling, Irl N. Polyester preparation from naphthalene dicarboxylic acids and 1,2 propanediol, Chemical Abstracts (vol. 70).
Encyclopedia of Polymer Science & Technology, vol. 11, pp. 68-76, relied on, 1969.

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