High modulus, high strength melt-processible polyester of hydroq

Details High modulus, high strength melt-processible polyester of hydroq High modulus, high strength melt-processible polyester of hydroq

1990-06-04

1992-01-07

Anderson, Harold D.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524601, 525437, 528176, 528179, C08J 6700, C08L 6700, C08G 6300

Patent

active

050792890

ABSTRACT:
This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (V). ##STR1## and blends of these polymers and articles made from both. Units (I), (II), (III), and (IV) are present in specified proportions as defined in the "Description of the Invention". The instant copolyesters display orientation in the molten state, good fiber ratings and high strength; they have melting points in the range of from about 340.degree. to about 400.degree. C. and are melt-processible. Advantageously, these compositions filled with about 30 weight percent of glass fibers display heat distortion temperatures of over 240.degree. C. up to about 280.degree. C. and higher, when measured under a load of 264 psi. When blended, certain properties are improved, particularly they are easier to melt fabricate, have a decreased tendency to blister and increased strength. These polymers and blends may be used advantageously in ovenware, electronic components, electrical equipment, and other end uses requiring high temperatures.

REFERENCES:
patent: 4585823 (1986-04-01), Saito et al.
patent: 4626557 (1986-12-01), Duska et al.
patent: 4742149 (1988-05-01), Finestone

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