Polyester polymer containing the residue of the UV absorbing benzopyran compound and shaped articles produced therefrom
US4882412A · kind A · utility
84Cited by
19References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Dec 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Composition 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-oxy-2H-1-benzopyran-2-one compound or a 7-oxy-2H-1-benzopyran-2-imine compound, said residue absorbing radiation in the range of about 330 to 380 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.