Patent ID: 8546516

Claim:
A thermoplastic polymer composition, comprising a bisphenol A free combination of: (a) from 40 to 60 pbw, based on 100 pbw of the polymer composition, of a polyimide selected from the group consisting of polyetherimides, polyetherimide sulfones, and combinations thereof, the polyimide having a weight average molecular weight ranging from 5,000 to 80,000 Daltons; (b) from 40 to 60 pbw, based on 100 pbw of the polymer composition, of a polyethylene terephthalate, the polyethylene terephthalate having (i) a diethylene glycol content ranging from 0.1 to 4 wt %, based on the weight of the polyethylene terephthalate, (ii) an intrinsic viscosity that is more than 0 and less than 0.60 dl/g, and (iii) carboxylic acid end groups in an amount ranging from 10 to 150 meq/Kg; (c) from 0 pbw to 1 pbw, based on 100 pbw of the polymer composition of a stabilizer selected from phenol-containing stabilizers, phosphorus-containing stabilizers, or a combination thereof; (d) from 10 to 300 ppm, based on the weight of the polyethylene terephthalate, of antimony; (e) from 0 to 300 ppm, based on the weight of the polyethylene terephthalate, of cobalt; (f) from 0 to 300 ppm, based on the weight of the polyethylene terephthalate, of titanium; and (g) less than 10 ppm of extractable bisphenol A as determined in accordance with migration protocols described in “Guidance for Industry: Preparation of Premarket Submissions for Food Contact Substances: Chemistry Recommendations” U.S. Department of Health and Human Services, Food and Drug Administration, Center for Food Safety and Applied Nutrition: April 2002; December 2007.