Baby bottles comprising polyester compositions which comprise cyclobutanediol

摘要

This invention relates to a baby bottle made from a polyester composition comprising a polyester further comprising 80 to 100 mole % terephthalic acid residues, 0 to 20 other diacid residues, 30 to 40 mole % 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 60 to 70 mole % 1,4-cyclohexanedimethanol residues, wherein the total diol residues equal 100 mole % and the total diacid residues equal 100 mole %. These baby bottles are unique in that they provide an alternative to baby bottles made from polycarbonate and they provide good heat resistance, good toughness, and good chemical resistance.

主权项

1. A baby bottle comprising at least one polyester composition comprising at least one polyester which comprises:
(a) a dicarboxylic acid component comprising:
i) 80 to 100 mole % of terephthalic acid residues;ii) 0 to 20 mole % of aromatic dicarboxylic acid residues having up to 20 carbon atoms; andiii) 0 to 10 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms; and (b) a glycol component comprising:
i) 30 to 40 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; andii) 60 to 70 mole % of 1,4-cyclohexanedimethanol residues, wherein the total mole % of the dicarboxylic acid component is 100 mole %, and the total mole % of the glycol component is 100 mole %; wherein the inherent viscosity of said polyester is from 0.50 to 0.68 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.; wherein said polyester has a Tg of from 100 to 130° C.; wherein said polyester has a melt viscosity of less than 10,000 poise as measured at 1 radian/second on a rotary melt rheometer at 290° C.; wherein said polyester has a notched Izod impact strength of at least 7.5 ft-lb/inch at 23° C. according to ASTM D256 with a 10-mil notch in a ⅛-inch thick bar; and wherein said baby bottle comprises no polycarbonate.