Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-08-25
1977-11-08
Tillman, Murray
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
264176F, 264210F, C08L 6700, B28B 320, D01D 512, D01F 1100
Patent
active
040575977
ABSTRACT:
Disclosed are block-type aryl copolyesters, the process for obtaining these as well as the filaments produced therefrom, and the process for obtaining such filaments.
The aryl copolyesters contain from 10 to 90% of recurring flexible units of the formula ##STR1## WHERE R is an aliphatic, alicyclic or araliphatic radical, x is an integer from 2 to 6, and y = 0 or 1, and
From 90 to 10% of recurring rigid units of the formula ##STR2## and have an inherent viscosity of at least 0.25. The raw spun filaments produced therefrom possess a modulus of elasticity of at least 1,000 g/tex, and preferably at least 1,500 g/tex, and are obtained by melt-spinning at a temperature such that the copolyester is optically anisotropic at rest and in the relaxed state, followed by winding up the filament in a per se known manner. Such filaments can be used advantageously as reinforcing filaments.
REFERENCES:
patent: 2728747 (1955-12-01), Aelony et al.
patent: 3917743 (1975-11-01), Schroeder et al.
patent: 3957905 (1976-05-01), Sumoto et al.
patent: 3968183 (1976-07-01), Hayashi et al.
DeBenedictis, Sr. T.
Rhone-Poulenc-Textile
Tillman Murray
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