The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2013
Filed:
Jan. 12, 2012
Emmett Dudley Crawford, Kingsport, TN (US);
Thomas Joseph Pecorini, Kingsport, TN (US);
Douglas Stephens Mcwilliams, Kingsport, TN (US);
David Scott Porter, Blountville, TN (US);
Gary Wayne Connell, Church Hill, TN (US);
Emmett Dudley Crawford, Kingsport, TN (US);
Thomas Joseph Pecorini, Kingsport, TN (US);
Douglas Stephens McWilliams, Kingsport, TN (US);
David Scott Porter, Blountville, TN (US);
Gary Wayne Connell, Church Hill, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
Described are polyester compositions comprising at least one polyester which comprises terephthalic acid residues, 2,2,4,4-tetramethyl-l,3-cyclobutanediol, and 1,4-cyclohexanedimethanol, wherein the inherent viscosity of said polyester is from 0.55 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 from 110 to 160° C.; wherein the polyester composition comprises no polycarbonate; wherein the melt viscosity of the polyester is less than 10,000 poise as measured at 1 radian/second on a rotary melt rheometer at 290° C.; and wherein the polyester has a notched Izod impact strength, of at least 7.5 ft-lb/in.ch at 23° C. according to ASTM D256 with a 10-mil notch in a ⅛ inch thick bar. The polyesters may be manufactured into articles of manufacture as fibers, films, bottles or sheets.