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The synthesis and properties of three kinds of hyper-dispersants are studied in this paper, which are non-terminated, carboxyl-terminated and polyethylene imine grafted poly(hydroxyl carboxylic acid) ester. The hyper-dispersants are synthesized by the materials of 12-hydroxy-stearic acid, stearic acid and polyethylene imine, which are used to improve the dispersion properties of nano titanium dioxide (nano-TiO2) in low-concentration resin solution system. The influences of hyper-dispersants on the viscosity and stability of the system are studied. It is found that polyethylene imine grafted hyper-dispersant has the best dispersion performance in nano-TiO2 dispersion system, and the optimal content of the hyper-dispersant is 4%. Project supported by the Shanghai Leading Academic Disciplines (Grant No.T0105), and the Key Laboratory of Science & Technology of Eco-Textile (Donghua University), Ministry of Education of China  相似文献   
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(一) A卷第一部分基础知识部分(52分)一、汉字与拼音(8分)(一、指出加点字注音有错的一组:() A.畸形(ji)瞥见(pi己)裸子植物(lu6)B.辍学(ehu6)谧号(ahi)c.谬沦(nl二应。)湖泊(b6)缄言(ji如)襟怀(j功),.)选出下列带点字拼音正确的一项:(人.恨旗(如)渲染(x雌n)B.勉强(q去如.)驱使  相似文献   
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Reactive acrylate microgels with different reactive groups such as carboxyl, hydroxide groups had excellent prop-erties such as quick-dry, low viscosity, high adhesion and hardness, which made them extensively used in preparing paints or in coating-modification. Reactive acrylate microgels were prepared by emulsion co-polymerization with zwitterions surfactant, anionic surfactant and nonionic surfactant as co-emulsifier. The water-base baking paints made from reactive acrylate micro-gels and melamine-formaldehyde resin had excellent combination properties. The aluminium powder can be well-dispersed in the paints. The influences of monomer components on the properties of the water-base baking paints were discussed in this paper. And the baking paints were also compared with the marketing solvent acrylate baking paints. It was found that the water-base acrylate amino baking paints had better combination properties than the organic solvent acrylate baking paints, which means that the water-base baking paints had a bright marketing future.  相似文献   
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