Preparation method for inorganic composite white pigment capable of replacing titanium dioxide at high proportion

A technology of titanium dioxide and white pigments, which is applied in the treatment of inorganic pigments, chemical instruments and methods, and the treatment of dyed polymer organic compounds. It can solve the problems of incomplete coating of titanium dioxide and low substitution ratio of titanium dioxide in composite products, and achieve easy scale realization. The effect of production, tight cladding, and large light-scattering area
CN104119701AInactive Publication Date: 2014-10-29CHINA UNIV OF GEOSCIENCES (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF GEOSCIENCES (BEIJING)
Publication Date
2014-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method for an inorganic composite white pigment capable of replacing titanium dioxide at a high proportion. The method employs calcite, barite or white carbon black as an inorganic white powder with the granularity less than 45 mu m, employs rutile type titanium dioxide or anatase type titanium dioxide as pigment-grade titanium dioxide, employs sodium polyacrylate with the concentration of 25% or a sodium silicate solution with the concentration of 15% as a surfactant, and employs diluted sulfuric acid as a pH regulator. The inorganic composite white pigment capable of replacing titanium dioxide at a high proportion is prepared by respectively pulping the white mineral powder and the pigment-grade titanium dioxide with water, employing an organic modifier to perform surface modification, regulating pH value, then uniformly mixing the prepared pulps, and performing intense agitation, press filtering and drying processing. Specifically, in the compositions, the inorganic white powder accounts for 55%-76% by weight and the pigment-grade titanium dioxide accounts for 24%-45%.
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Description

technical field

[0001] The invention relates to the technical field of production of a white powder pigment, in particular to a preparation method of an inorganic composite white pigment that replaces titanium dioxide in a high proportion. Background technique

[0002] Pigment grade titanium dioxide, namely titanium dioxide, is a submicron powder material composed of crystalline phase titanium dioxide particles with a particle size of 0.2-0.3 μm. Since the birth of the titanium dioxide industry in the early 20th century, it has been widely used in many industrial fields such as coatings, plastics, papermaking and inks. pigment. The world's output of pigment grade titanium dioxide reached 5.5 million tons in 2009. As the world's largest production and consumption country, my country's output in 2011 reached 1.8119 million tons. At present, titanium dioxide pigments account for more than 90% of white pigments, and have become one of the important fine chemical raw materials ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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