Patent ID: 8497343

Claim:
An article comprising a polyester composition, wherein the polyester composition comprises a polyester polymer that consists of structural units derived from 1,4-benzenedicarboxylic acid, 1,3-benzenedicarboxylic acid, or a combination thereof, and 1,1-bis(4-hydroxy-3,5-dimethylphenyl)-4-tertiary-butyl-cyclohexane; wherein the polyester polymer has an intrinsic viscosity measured in a 60/40 volume by volume ratio of phenol/tetrachloroethane at 25° C. of at least greater than about 0.25 dL/g and a glass transition temperature of between about 150° C. and about 450° C.; wherein the polyester polymer transmits greater than 90 percent light in the region of about 400 nm to about 800 nm and has a yellowness index of less than about 2; and wherein the polyester composition further comprises an additive selected from the group consisting of anti-oxidants, flame retardants, reinforcing materials, colorants, mold release agents, fillers, nucleating agents, UV light stabilizers, heat stabilizers, lubricants, antioxidants, flame retardants, pigments, and combinations thereof.