Process for producing polyester with coated titanium dioxide

Details Process for producing polyester with coated titanium dioxide Process for producing polyester with coated titanium dioxide

C - Chemistry, Metallurgy

08

G

C08G 63/85 (2006.01) C08G 63/82 (2006.01) C08K 9/02 (2006.01) C08K 9/04 (2006.01)

Patent

CA 2454497

A process for producing a polyester. The process comprises polymerizing a polymerization mixture comprising (i) a carbonyl compound or an oligomer of a carbonyl compound and (ii) a glycol, in the presence of a titanium catalyst composition, to produce the polyester, wherein a coated titanium dioxide comprising a titanium dioxide and a coat is added before or during the polymerizing.

L'invention concerne un procédé de production d'un polyester. Ce procédé consiste à polymériser un mélange de polymérisation comprenant (i) un composé carbonyle ou un oligomère d'un composé carbonyle et (ii) un glycol, en présence d'une composition catalytique de titane, d'où la production du polyester. Selon ce procédé, on ajoute un dioxyde de titane enrobé comprenant un dioxyde de titane et un enrobage avant ou pendant la polymérisation.

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