Moldable/extrudable thermotropic copolyesters/copolyesteramides
US4904756A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Jul 11, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High molecular weight thermotropic copolyesters and copolyesteramides which can be molded/extruded into a wide variety of useful shaped articles having improved thermomechanical properties are comprised of recurring structural units of the formulae (I), (II), (III) and (IV), wherein ##STR1## in which the symbol A is an oxygen atom or the NH group; the molar ratio of the units (I) relative to the sum of the units (II)+(III) ranges from 0.95 to 1.05; PA1 the amount of the units (II) in the mixture of (II)+(III) ranges from 20 to 90 mol % and that of the units (III), on the same basis, ranges from 80 to 10 mol %; PA1 the amount of the units (IV), expressed relative to the amount of the units (I), ranges from 25 to 300 mol %; and PA1 said copolyesters and copolyesteramides have a flow temperature ranging from 200.degree. to 350.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.