C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/91 (2006.01) C08G 59/50 (2006.01) C08L 63/00 (2006.01) C08L 67/02 (2006.01) C08G 63/672 (2006.01)
Patent
CA 2337236
Copolyether ester elastomers are provided which contain epoxide compounds. The compositions show improved bloom resistance in the presence of diamines with minimum increase in melt viscosity. Also disclosed are methods to improve appearance and eliminate bloom from finished products comprising thermoplastic copolyesters by lowering the level of acid terminated oligomers in the thermoplastic copolyesters with epoxide compounds.
L'invention concerne des élastomères d'esters de copolyéther contenant des composés époxydes. Les compositions possèdent une résistance améliorée à l'efflorescence en présence de diamines avec une augmentation minimale de la viscosité à chaud. L'invention concerne également des procédés permettant d'améliorer l'aspect et d'éliminer l'efflorescence de produits finis comprenant des copolyesters thermoplastiques, par réduction du niveau d'oligomères à terminaison acide dans les copolyesters thermoplastiques avec des composés époxydes.
Bennett Jones Llp
E.i. Du Pont de Nemours And Company
LandOfFree
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