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AssigneeAmoco Corporation
InventorsRichard Layton, James W. Cleary, Paul J. Huspeni, Paul D. Frayer, Markus Matzner
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This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (IV). ##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.
A fully aromatic polyester blend comprising 1 to 19 parts by weight of a polyester (a) comprising the following recurring moieties:
A blend comprising from about 1 to about 19 parts by weight of a first polyester polymer (a) comprising units (I), (II), (III) and (IV):
A blend consisting essentially of about 1 to about 95 parts by weight of a first polyester (a) comprising units (I), (II), (III) and (IV):
A blend comprising from about 1 to about 19 parts by weight of a first polyester polymer comprising units (IX), (X), (XI), (XII):
A blend consisting essentially of from about 1 to 19 parts by weight of a first polyester comprising units (IX), (X), (XI), (XII):
Dependencies are inferred from the claim text.