Preparation of organic additive-treated, pyrogenic silica-encapsulated titanium dioxide particles
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP1591490A2
公开(公告)日:2005-11-02
One aspect of the invention is to provide a composition comprising a titanium dioxide particle having on the surface of said particle a substantially encapsulating layer comprising a pyrogenically-deposited metal oxide; said substantially encapsulating layer having on its surface at least one organic surface treatment material selected from an organo-silane, an organo-siloxane, a fluoro-silane, an organo-phosphonate, an organo-acid phosphate, an organo-pyrophosphate, an organo-polyphosphate, an organo-metaphosphate, an organo-phosphinate, an organo-sulfonic compound, a hydrocarbon-based carboxylic acid, an associated ester of a hydrocarbon-based carboxylic acid, a derivative of a hydrocarbon-based carboxylic acid, a hydrocarbon-based amide, a low molecular weight hydrocarbon wax, a low molecular weight polyolefin, a co-polymer of a low molecular weight polyolefin, a hydrocarbon-based polyol, a derivative of a hydrocarbon-based polyol, an alkanolamine, a derivative of an alkanolamine, an organic dispersing agent, or a mixture thereof. Another aspect of the invention is to provide processes for producing said composition.
本发明的一个方面是提供一种组合物,该组合物包含一种二氧化钛颗粒,在该颗粒的表面有一个基本封装层,该封装层由热沉积金属氧化物组成;所述基本封装层表面具有至少一种有机表面处理材料,该材料选自有机硅烷、有机硅氧烷、氟硅烷、有机膦酸盐、有机酸磷酸盐、有机焦磷酸盐、有机聚磷酸盐、有机偏磷酸盐、有机膦酸盐、有机磺酸化合物、烃基羧酸、烃基羧酸的伴生酯、烃基羧酸的衍生物、烃基酰胺、低分子量烃蜡、低分子量聚烯烃、低分子量聚烯烃的共聚物、烃基多元醇、烃基多元醇的衍生物、烷醇胺、烷醇胺的衍生物、有机分散剂或它们的混合物。本发明的另一方面是提供生产所述组合物的工艺。