Poly(ethylene 2,6-naphthalene dicarboxylate)/aromatic ketone compositions having reduced fluorescence
AssigneeEastman Chemical Company
InventorsAllan S. Jones, David E. Mills, Mitchell A. Winnik
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Abstract
This invention relates to a poly(ethylene 2,6-naphthalene dicarboxylate) composition having reduced fluorescence. More specifically, the composition contains poly(ethylene 2,6-naphthalene dicarboxylate) with 0.1 to 5 mole percent of a copolymerizable aromatic ketone. The polyesters are useful for packaging applications where clarity and/or aesthetic appeal are of concern.
Claims18
A poly(ethylene 2,6-naphthalene dicarboxylate) composition with reduced fluorescence comprising repeat units from:
- (a) a dicarboxylic acid component which comprises at least 85 mole percent of a dicarboxylic acid selected from the group consisting of naphthalene-2,6-dicarboxylic acid, and naphthalene-2,6-dicarboxylate ester;
- (b) a diol component which comprises at least 85 mole percent of ethylene glycol;
- and
- (c) 0.1 to 5 mole percent, based on 100 mole percent dicarboxylic acid and 100 mole percent diol, of a copolymerizable aromatic ketone which has at least one acyl group directly attached to the aromatic ring.
A poly(ethylene 2,6-naphthalene dicarboxylate) composition with reduced fluorescence comprising repeat units from:
- (a) a dicarboxylic acid component consisting essentially of a dicarboxylic acid selected from the group consisting of naphthalene-2,6-dicarboxylic acid, and naphthalene-2,6-dicarboxylate ester;
- (b) a diol component consisting essentially of ethylene glycol;
- and
- (c) 0.1 to 5 mole percent, based on 100 mole percent dicarboxylic acid and 100 mole percent diol, of a copolymerizable aromatic ketone which has at least one acyl group directly attached to the aromatic ring.
A poly(ethylene 2,6-naphthalene dicarboxylate) composition with reduced fluorescence comprising repeat units from:
- (a) a dicarboxylic acid component which comprises at least 85 mole percent of a dicarboxylic acid selected from the group consisting of naphthalene-2,6-dicarboxylic acid, and naphthalene-2,6-dicarboxylate ester;
- (b) a diol component which comprises at least 85 mole percent of ethylene glycol;
- and
- (c) 0.3 to 2.5 mole percent, based on 100 mole percent dicarboxylic acid and 100 mole percent diol, of a copolymerizable aromatic ketone which has at least one acyl group directly attached to the aromatic ring.
Dependencies are inferred from the claim text.