Polyester polymer containing the residue of a benzopyran colorant compound and shaped articles produced therefrom
US4892922A · kind A · utility
88Cited by
16References
12Claims
0Family size
Assignee
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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 primaryC09B57/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Colored polyester compositions useful for molding into articles such as food containers, beverage bottles, cured structural plastics and the like comprising molding grade polyester such as a linear, thermoplastic polyester having reacted therewith or copolymerized therein the residue of a 7-amino-2H-1-benzopyran-2-one compound or a 7-amino-2H-1-benzopyran-2-imine compound, said residue absorbing radiation in the range of about 400 to 450 nm and being non-extractable from said polymer and stable under polymer formation and processing conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.