초록 ▼

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 c

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.

대표청구항 ▼

A composition comprising molding grade polyester having copolymerized therein or reacted therewith the residue of a benzopyran compound having the formula [Figure] R1 is hydroxy, －O－R5 or [Figure] R2 is hydrogen, alkyl, －O－R5, or halogen; R4 is cyano, [Figure] carbamoyl, [Figure] or a carbocyclic or

A composition comprising molding grade polyester having copolymerized therein or reacted therewith the residue of a benzopyran compound having the formula [Figure] R1 is hydroxy, －O－R5 or [Figure] R2 is hydrogen, alkyl, －O－R5, or halogen; R4 is cyano, [Figure] carbamoyl, [Figure] or a carbocyclic or heterocyclic aryl radical; and X is oxo or imino; wherein R5 is alkenyl or an alkyl, cycloalkyl or aryl radical; and R6 is hydrogen or an alkyl, cycloalkyl or aryl radical; provided the benzopyran compound bears at least one substituent that is reactive with one of the monomers from which the polyester is derived, said residues absorbing radiation in the range of about 330 to 380 nm and being non-extractable from said polyester and stable under the polyester processing conditions.