Transparent polyester resins and articles therefrom

Details Transparent polyester resins and articles therefrom Transparent polyester resins and articles therefrom

2006-05-23

2006-05-23

Woodward, Ana (Department: 1711)

Stock material or miscellaneous articles

Longitudinally sectional layer of three or more sections

Next to unitary sheet of equal or greater extent

C525S425000

Reexamination Certificate

active

07048981

ABSTRACT:
Compositions suitable for preparing transparent articles comprising an aromatic polyester resin selected from a copolyalkylene terephthalate containing from 3 to 15% by moles of units derived from isophtalic acid and/or a naphtalene dicarboxylic acid and a polyxylylene amide, preferably poly (m.xylylene adipamide), in which the polymide is dispersed in the polyester resin as domains with average numeral size of 30 to 200 nm. The compositions are obtained by premelt-mixing the polyester with a dianhydride of a tetracarboxylic acid prior mixing the polyxylylene amide using melt viscosity ration between the polyester resin and the polyxylylene amide higher that 1.5:1, preferably from 3:1 to 8:1.

REFERENCES:
patent: 6239210 (2001-05-01), Kim et al.
patent: 6288161 (2001-09-01), Kim et al.
patent: 6346307 (2002-02-01), Al Ghatta et al.

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