Wholly aromatic polyester of isophthalic acid, terephthalic acid, p-hydroxybenzoic acid, hydroquinone and an arylene diol
US5089594A · kind A · utility
17Cited by
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9Claims
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Key dates
| Filing date | Jun 4, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Jun 4, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aromatic polyesters based on isophthalic acid, terephthalic acid, p-hydroxybenzoic acid, hydroquinone and an arylene diol are described. The five monomers ae used in well-specified proportions and yield polymers that display an excellent overall combination of mechanical and thermal properties. The subject copolyesters have melting points of at least about 260.degree. C.; their heat distortion temperatures are at least about 200.degree. C. they have fiber ratings of up to 3. The novel polymers can be melt-fabricated using standard injection molding, extrusion and melt-spinning techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.