C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/5317 (2006.01) C08G 63/00 (2006.01) C08K 5/5313 (2006.01) C08L 67/00 (2006.01)
Patent
CA 2539607
The present invention relates to a process of preparing a polycondensate in the presence of a fluorescent whitening agent and at least one phosphonate, and/or phosphinate. Further aspects of the invention are a polyester prepared according to this process and composition comprising a polycondensate, a fluorescent whitening agent and at least one phosphonate and/or phosphinate. Yet another aspect is the use of a fluorescent whitening agent and at least one phosphonate and/or phosphinate for improving the color of a polycondensate.
La présente invention concerne un processus de préparation d'un polycondensat en présence d'un azurant fluorescent et d'au moins un phosphonate, et/ou d'un phosphinate. D'autres aspects de cette invention ont pour objet un polyester préparé selon ce processus et une composition renfermant un polycondensat, un azurant fluorescent et au moins un phosphonate et/ou un phosphinate. Toutefois, un autre aspect a trait à l'utilisation d'un azurant fluorescent et d'au moins un phosphonate et/ou d' phosphinate dans l'amélioration de la couleur d'un polycondensat.
Ergenc Nadi
Simon Dirk
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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