Polyester compositions containing cyclobutanediol having a certain combination of inherent viscosity and high glass transition temperature and articles made therefrom
US8415450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2012 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | Jan 12, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.