申请人:ChemIP B.V.
公开号:EP2048116A1
公开(公告)日:2009-04-15
The invention relates to a dispersion of nanoparticles in an organic solvent, comprising
a) 5-75 wt% of nanoparticles having a mean average size between 1 and 100 nm.
b) a solvent comprising a hydroxyl group and an ether group.
c) a water content of less then 15wt%.
d) a dispersant content of less then 0,1 wt%.
The invention also relates to a method of making such a dispersion, by
I. Making a mixture of an aqueous dispersion of particles having an average size between 1 and 100 nm, a solvent comprising a hydroxyl group and an ether group, which forms an azeotrope with water, and a grafting compound.
II. Heating the mixture under stirring at a temperature between 20 and 150 °C.
III. At least partially removing the solvent/water mixture.
IV. Optionally adding more solvent.
V. Repeating steps I and IV till the water content of the obtained dispersion is less then a desired value and the concentration solid is between 5 and 70 wt%.
本发明涉及一种纳米颗粒在有机溶剂中的分散体,包括
a) 5-75 wt%的纳米颗粒,其平均粒径在 1 到 100 nm 之间。
b) 由羟基和醚基组成的溶剂。
c) 水含量低于 15wt%。
d) 分散剂含量低于 0.1 wt%。
本发明还涉及一种制造这种分散体的方法,其方法是
I.将平均粒径在 1 至 100 纳米之间的颗粒的水性分散体、包含羟基和醚基(与水形成共沸物)的溶剂以及接枝化合物制成混合物。
II.在 20 至 150 °C 的温度下搅拌加热混合物。
III.至少部分去除溶剂/水混合物。
IV.可选择添加更多溶剂。
V.重复步骤 I 和 IV,直到所得到的分散液的含水量小于所需值,固体浓度介于 5 至 70 wt%之间。