Furyl-2-methylidene uv absorbers and compositions...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 63/78 (2006.01) C08G 63/02 (2006.01) C08G 63/82 (2006.01) C08G 63/83 (2006.01) C08G 63/87 (2006.01)

Patent

CA 2565865

A method for efficiently incorporating a UV absorber into a polyester resin. The method includes forming a reaction mixture comprising a diol component, a diacid component selected from the group consisting of dicarboxylic acids, dicarboxylic acid derivatives, and mixtures thereof, an antimony containing compound, a phosphorus containing compound, a metal containing compound, and a UV absorber. The reaction mixture is polymerized in a polycondensation reaction system. In another embodiment of the present invention, the UV absorber is, added while the reaction products from one reactor are transferred to the next reactor in the polycondensation reaction system. The present invention is also directed to novel UV absorbing compounds as well as articles made from the polyester resin.

L'invention concerne un procédé permettant d'incorporer efficacement un absorbeur de rayons ultraviolets dans une résine de polyester. Ledit procédé consiste à former un mélange de réaction comprenant un composant diol, un composant diacide sélectionné dans le groupe constitué par des acides dicarboxyliques, des dérivés d'acide dicarboxylique et des mélanges de ceux-ci, un composé contenant un antimoine, un composé contenant un phosphore, un composé contenant un métal et un absorbeur de rayons ultraviolets. Ledit mélange de réaction est polymérisé dans un système de réaction de polycondensation. Dans un autre mode de réalisation de l'invention, l'absorbeur de rayons ultraviolets est ajouté pendant que les produits de réaction provenant d'un réacteur sont transférés dans le réacteur suivant dans le système de réaction de polycondensation. L'invention concerne également de nouveaux composés absorbants les ultraviolets ainsi que des articles produits à partir de la résine de polyester.

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