Wholly aromatic polyesters comprising isophthalic acid, terephthalic acid, p-hydroxybenzoic acid, hydroquinone and an arylene diol
US5066767A · kind A · utility
18Cited by
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11Claims
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Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K7/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Wholly aromatic polyesters based on isophthalic acid, terephthalic acid, p-hydroxybenzoic acid, hydroquinone and an arylene diol, e.g. 4,4'-biphenol are described. The materials displayed are excellent overall combination of mechanical and thermal properties. Their melting points and heat distortion temperatures (264 psi) are at least about 260.degree. C. and 260.degree. C., respectively. These novel polymers can be melt-fabricated using standard injection molding, extrusion, and melt spinning techniques and yield fabricated articles with good surface characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.