摘要:
The invention relates to a rutile titanium dioxide pigment for use in decorative laminating papers that yields higher opacity of the papers compared to the prior art, as well as a method for its manufacture. The pigment displays a surface coating that contains aluminum phosphate, aluminum oxide, silicon oxide and titanium oxide. The silicon oxide is precipitated in fluffy form. The coated particles display a BET value of at least 15 m2/g.The manufacturing method is characterized in that an aluminum and a phosphorus component are first added to a TiO2 suspension. Thereafter, an alkaline silicon component, an acid-reacting titanium component and, optionally, a further pH-regulating component are added, the pH value being set in the range from 4 to 9 in this context.
摘要:
A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.
摘要:
A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.
摘要:
A weather-resistant titanium dioxide pigment particularly suitable for use in engineering plastics, as well as to a method for its manufacture and to polymers containing the pigment. The titanium dioxide is provided with a surface coating that, from the inside to the outside, displays a SiO2 layer, an Al2O3 layer and an organic layer, where the maximum total Al2O3 content is 2.4% by weight and the organic layer contains at least one compound from the group comprising H-siloxanes, silicone oils and organically functionalised polysiloxanes. The manufacturing method is characterised in that an aqueous suspension of Al-doped titanium dioxide particles is milled in an agitator mill, and a SiO2 layer and an Al2O3 layer are then applied in batch mode, after which an organic layer is applied that contains at least one compound from the group comprising H-siloxanes, silicone oils and organically functionalised polysiloxanes.
摘要翻译:特别适用于工程塑料的耐候性二氧化钛颜料,以及其制造方法和含有颜料的聚合物。 二氧化钛被提供有表面涂层,其从内到外显示SiO 2层,Al 2 O 3层和有机层,其中最大总Al 2 O 3含量为2.4重量%,并且有机层包含至少一个 化合物由包含H-硅氧烷,硅油和有机官能化的聚硅氧烷组成。 该制造方法的特征在于,在搅拌机中研磨掺杂Al的二氧化钛颗粒的水性悬浮液,然后分批施加SiO 2层和Al 2 O 3层,然后施加至少含有有机层 一种来自包含H-硅氧烷,硅油和有机官能化聚硅氧烷的化合物。
摘要:
A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.
摘要:
A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.
摘要:
A method for manufacturing inorganic solid particles, particularly titanium dioxide pigment particles, with a smooth and homogeneous surface coating in an aqueous suspension.
摘要:
A method and material for improved TiO2 pigment for paper and laminates is described. Phosphorous, titanium, and aluminum compounds are successively added to a TiO2 pigment suspension. Resulting pigments show improved greying resistance and hiding power over prior art pigments, and show improved results as pigments in tests of paper and laminates.
摘要:
The invention relates to a method for the surface treatment of a titanium dioxide that leads to pigments with improved retention and improved opacity, where consistently high opacity can be obtained using less pigment. The method is characterised in that an aluminium component and a phosphorus component are first added to a TiO2 suspension, during which process its pH value does not drop below 10. The pH value of the suspension is subsequently lowered to below 9 by adding an acid component. The pigment produced by the method according to the invention is eminently suited to use in decorative laminating paper.
摘要:
The invention relates to a method for the post-treatment of titanium dioxide, in order to produce particularly weather-resistant titanium dioxide pigments with good optical properties. The method is characterized in that, together with the hydrous oxides of tin and zirconium, at least one other from the group comprising aluminium, silicon and titanium is additionally precipitated onto the particle surface. The post-treatment components are added to the aqueous TiO2 suspension either in the acidic range (pH value of 3 at most) or in the alkaline range (pH value of 10 at least). The pH value is subsequently set to between 6 and 8. Final tempering of the pigment at elevated temperatures from over 125° C. to up to 500° C. can improve the tone b. The pigment is particularly suitable for use in paints, coatings and plastics.