Patent ID: 8168707

Claim:
A thermoplastic composition comprising, based on the total weight of the composition: from 51 to 90 wt % of a polyester having a weight average molecular weight from 20,000 to 80,000 daltons, a carboxylic acid end group content from 5 to 50 meq/Kg, and a melting point temperature from 200 to 285° C., wherein the polyester is selected from the group consisting of poly(ethylene terephthalate)s, poly(1,4-butylene terephthalate)s, poly(1,3-propylene terephthalate)s, poly(cyclohexanedimethanol terephthalate)s, poly(cyclohexanedimethylene terephthalate)-co-poly(ethylene terephthalate)s, and a combination thereof; from 10 to 49 wt % of an acrylonitrile-butadiene-styrene impact modifier composition, having an average particle size of 50 to 400 micrometers, a gel content of at least 50 wt %, a polybutadiene content of at least 50 wt % of the impact modifier composition, and a soluble styrene-acrylonitrile copolymer content ranging from 0 to 5 wt % of the impact modifier composition; from 0 to 20 wt % of a multifunctional epoxy compound; from 0 to 40 wt % of a filler; from 0 to 2 wt % of a fibrillated fluoropolymer; and from at least about 0.75 wt. % to 5 wt % of a stabilizer composition comprising at least about 0.75 wt % of thioester having a molecular weight of greater than 500 daltons, wherein the stabilizer composition comprises at least 20 wt % thioether ester, based on the weight of the stabilizer composition, and wherein at least one additional stabilizer is selected from the group consisting of hindered phenols, phosphites, phosphonites, phosphoric acid, and a combination thereof; wherein an article that is blow molded from the thermoplastic composition has a multi-axial impact total energy ranging from 40 to 100 Joules at −30° C., a ductility of more than 90% at −30° C., and a ductility of more than 50% at −40° C., measured in accordance with ASTM D3763; and wherein the thermoplastic composition: has a permeability of more than 0 and less than or equal to 1.5 g/m 2 -day to ASTM D 471-98 Fuel C, measured after exposure to ASTM D 471-98 Fuel C vapor for 20 weeks at 40° C., using a disc having a diameter of 22 mm and a thickness of 2 mm; has an MVR of 1 to 20 cc/10 min, measured in accordance with ASTM D1238 at 265° C.; has a flexural modulus of greater than 1300 MPa, measured in accordance with ASTM D790; retains at least 75% of its initial tensile elongation at break, as measured by ASTM D638, after exposure to Fuel E85 for 28 days at 70° C.; and has a ratio of melt viscosity at a shear rate of 50 s-1 to a melt viscosity at a shear rate of 4000 s-1 of 6 to 12, measured at 265° C. in accordance with ASTM D3835.