Modification Of Industrial Pigment And Its Application

Pigments have a very broad range of applications, but their application performances are limited by their particle size, shape, and dispersion performance in the matrix, so they are always treated before use. Surface treatment on the surface of the pigment particles, can change the color of the surface characteristics, and make it more consistent with application requirements. The surface treatment of pigments, when used in coatings, can improve their dispersion, change the flow state in the matrix, improve paint durability, light resistance, chemical resistance and other aspects of performance. In this paper, two aspects of work were to do:for iron oxide yellow, the needle-like particle shape made it difficult scattered in organic matrix, and the poor thermal stability, modification with polymer coated particle surface; and we used phthalocyanine copper papered a composite green pigment with iron oxide yellow, added different modifiers, and to study the effect of colored concrete coloring.We firstly systematically analyzed industrial production and application of inorganic pigment problems,and on the basis of that the surface modification technology and development of titanium dioxide, iron oxide red, iron oxide yellow pigments and other industrial inorganic pigments were reviewed.We discussed the types of silane coupling agent, methyl methacrylate monomer concentration and reaction temperature on the iron oxide yellow modification effect, the single factor analysis of the above obtained yellow polymer coated iron response modification conditions:the reaction temperature is kept at 70℃, the silane coupling agent KH570 modified iron oxide yellow with 1.6g of methyl methacrylate monomer coated surface modification 5-6h, the pigments in organic solvents are toluene in the settling time to 23.2h, dispersion rate of 71.4%, while the pigment of acid and alkali resistance and other properties were also improved to some extent. Characterized by infrared spectroscopy, UV-visible spectrum,ξpotential and scanning electron microscopy, we knew that the hydroxyl groups of full hydrolysis of the silane coupling agent and the surface of iron oxide yellow linkaged, made the surface become hydrophobic from hydrophilic. When SDS joined, the hydrophobic chain grafted onto the surface of iron Yellow silane coupling agent by hydrophobic adsorption on the surface and formed micelles, the methyl methacrylate monomer and initiator by adding iron oxide yellow suspension solution polymerized, resulting in iron oxide yellow polymer chains grafted onto the surface. Scanning electron microscope showed that the modified pigment particle shape of a certain change, better dispersion of particles. Heat resistance test and the UV-Vis analysis showed that the increased heat resistance paint.Iron oxide yellow-phthalocyanine copper compound pigment was prepared by means of mechanochemistry, its preparation process conditions:the mass ratio of the iron oxide yellow and copper phthalocyanine was 4:1, the speed 30r/min ball-milled 30min. Different types of surface active agent or coupling agent for composite pigment, were prepared the hydrophilic and hydrophobic pigment, from different modifiers on the pigment wetting and dispersing properties. The composite green coloring pigment for colored concrete, concrete of the pigment content and color intensity of the relationship between the hydrophobic and hydrophilic pigments coloring effect on the concrete. Results of composite surface hydrophobicity green coloring pigment in the concrete effective were explained from the two angles:colorful and difficult to cause white specks, because of its relative pigment particles from the cement hydration packages, improved color concrete permeability resistance.