Optical articles comprising isosorbide polyesters and method for making same
AssigneeE.I. duPont de Nemours and Company
InventorsGaro Khanarian, Larry F. Charbonneau, Helmut B. Witteler
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Abstract
An optical article made of a transparent polymer which includes terephthaloyl moieties, optionally, other aromatic diacid moieties; ethylene glycol moieties; isosorbide moieties; and, optionally, one or more other diol moieties, wherein the polymer has an inherent viscosity of at least about 0.35 dL/g as measured on a 1% solution (weight/volume) in o-chlorophenol at 25.degree. C.
Claims22
An optical article comprising a transparent polymer which comprises terephthaloyl moieties, optionally, other aromatic diacid moieties;
- ethylene glycol moieties;
- isosorbide moieties;
- and, optionally, one or more other diol moieties, wherein said polymer has an inherent viscosity of at least about 0.35 dL/g as measured on a 1% solution (weight/volume) in o-chlorophenol at 25.degree. C.
A method of making an optical article, comprising the steps of:
- (a) providing a polymer which comprises terephthaloyl moieties, optionally, other aromatic diacid moieties;
- ethylene glycol moieties;
- isosorbide moieties;
- and, optionally, one or more other diol moieties, wherein said polymer has an inherent viscosity of at least about 0.35 dL/g as measured on a 1% solution (weight/volume) in o-chlorophenol at 25.degree. C.;
- and
- (b) shaping said polymer into an optical article or a substrate that is used in an optical article.
Dependencies are inferred from the claim text.