Polyester compositions containing the residue of a naphthopyran compound and shaped articles produced therefrom
US4892923A · kind A · utility
82Cited by
19References
8Claims
0Family size
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Key dates
| Filing date | Dec 21, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Dec 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6854
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are compositions useful for molding into articles such as food containers, beverage bottles, cured structural plastics and the like comprising a polyester such as a linear, thermo-plastic polyester having reacted or copolymerized therein the residue of a 3H-naphtho[2,1-b]pyran-3-one or 3H-naphtho[2,1-b]pyran-3-imine compound. The naphthopyran compounds and residues are stable at the high temperatures at which the polymers are prepared and absorb radiation in the range of 350 to 450 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.