Polyester compositions

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 3/32 (2006.01) C08K 5/49 (2006.01) C08L 67/02 (2006.01) C08L 23/02 (2006.01) C08L 51/04 (2006.01)

Patent

CA 2450808

Disclosed are certain novel polyester compositions particularly useful for shaping or forming into containers and similar.shaped articles by thermoforming procedures. The polyester compositions comprise a thermoplastic polyester, an impact modifier and a polyester crystallization rate enhancing component selected from poly(tetramethylene terephthalate) homo- and co- polymers. The polyester compositions exhibit improved crystallization rates as compared to similar compositions not including impact modifier or compositions using other types of crystallization rate enhancing components such as polyolefin-based polymers.

L'invention concerne certaines nouvelles compositions à base de polyester utilisées en particulier pour être modelées ou formées dans des récipients et des articles formés de forme similaire par des procédures de thermoformage. Lesdites compositions à base de polyester comprennent un polyester thermoplastique, un antichoc et un composant améliorant le taux de cristallisation du polyester sélectionné parmi des poly(tétraméthylène téréphtalate) homopolymères et copolymères. Lesdites compositions à base de polyester présentent des taux de cristallisation améliorés par rapport à des compositions similaires ne comprenant pas d'antichoc ou des compositions contenant d'autres types de composants améliorant le taux de cristallisation tels que des polymères à base de polyoléfine.

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