Treated titanium dioxide

Details Treated titanium dioxide Treated titanium dioxide

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01)

Patent

CA 2212771

A pigmentary material comprises particulate titanium dioxide the particles of which have been treated with a polymeric hindered amine stabiliser. The stabiliser is a polymer having a main chain substantially free of acidic groups and having hindered amine stabilising groups. The stabilising groups comprise at least 35 per cent by weight of the polymer. Preferably, the titanium dioxide particles are also treated with an organic compound such as a polyhydric alcohol, an alkanolamine, a polysiloxane or a fatty acid.

L'invention concerne une matière pigmentaire comprenant des particules d'oxyde de titane qui ont été traitées avec un stabilisant polymérique à groupements amine immobilisés. Le stabilisant est un polymère dont la chaîne principale est pour l'essentiel exempte de groupements acides et qui comporte des groupements amine immobilisés stabilisants. Les groupements stabilisants représentent au moins 35 % du poids du polymère. De préférence, les particules d'oxyde de titane sont également traitées avec un composé organique comme un polyol, un alcaloamine, un polysiloxane ou un acide gras.

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