COPOLYESTERS OF TEREPHTHALIC ACID AND 1,4-CYCLOHEXANEDIMETHANOL HAVING IMPROVED MELT STABILITY

Disclosed are copolyesters of terephthalic acid and 1,4-cyclohexanedimethanol containing selected phosphites or phosphonites which improve molecular weight retention after exposure to melt temperatures. In the phosphite or phosphonite, at least one of the P-O bonds is attached to an aryl radical. Th...

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Hauptverfasser:	CASSELL, MICHAEL, LYNN, BRANSCOME, LARRY, WAYNE, PRUETT, WAYNE, PAYTON, SMALL, JAMES, DOUGLAS, JR
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	Disclosed are copolyesters of terephthalic acid and 1,4-cyclohexanedimethanol containing selected phosphites or phosphonites which improve molecular weight retention after exposure to melt temperatures. In the phosphite or phosphonite, at least one of the P-O bonds is attached to an aryl radical. The compositions are useful in clear injection molding applications. Copolyester d'acide téréphtalique et 1,4-cyclohexanediméthanol contenant des phosphites ou des phosphonites sélectionnés, lesquels améliorent la rétention de masse moléculaire après exposition à des températures de fusion. Dans le phosphite ou le phosphonite, au moins une des liaisons P-O est fixée à un radical aryle. Les compositions sont utiles dans des applications de moulage par injection transparentes.