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Nano-TiO2 adopting core-shell structure for white high-covering-power pigment and preparation method of nano-TiO2

A nano-titanium dioxide, core-shell structure technology, applied in chemical instruments and methods, inorganic pigment treatment, dyed polymer organic compound treatment, etc. It can improve the shading performance, shorten the preparation time and reduce the dosage.

Inactive Publication Date: 2016-07-27
温州市鹿城区中津先进科技研究院 +1
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Problems solved by technology

The existing ordinary rutile TiO2 is easy to agglomerate together during the drying process of the coating, and the distribution on the coating surface is uneven
As a result, the reflection of light on some places on the surface of the paint is weakened, and the shading and anti-fouling capabilities of the paint are reduced, so a lot of titanium dioxide must be used to achieve a certain shading performance

Method used

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  • Nano-TiO2 adopting core-shell structure for white high-covering-power pigment and preparation method of nano-TiO2
  • Nano-TiO2 adopting core-shell structure for white high-covering-power pigment and preparation method of nano-TiO2

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Embodiment Construction

[0012] A specific example of a core-shell structure nano-titanium dioxide used for high-hiding white pigments and a preparation method thereof according to the present invention, the titanium dioxide nano-particles of the titanium dioxide composite material are in the form of a hard polymer shell wrapped with high-molecular titanium The core-shell structure of the white powder nanoparticle core, the polymer adopts lactic acid, glycolic acid, caprolactone, styrene, C4-C8-alkyl acrylate, C4-C8-alkyl methacrylate, or -alkylaryl ester A polymer composed of copolymers that are monomer units. Its preparation comprises the following steps:

[0013] ①Using titanium dioxide or titanium dioxide as the raw material, the titanium dioxide that is insoluble in the oil phase is dispersed into the oil phase solvent in which the polymer material is dissolved by the double emulsification method, and mixed and stirred to form an oil-in-oil solid particle emulsion; the oil phase solvent Organic ...

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Abstract

The invention relates to nano-TiO2 adopting a core-shell structure for a white high-covering-power pigment and a preparation method of nano-TiO2. Each TiO2 nano-particle of a TiO2 composite adopts a core-shell structure with a polymer TiO2 nano-particle inner core wrapped by a hard polymer shell. According to the core-shell structures of the TiO2 nano-particles, the TiO2 nano-particles keep independent one another, so that agglomeration of the TiO2 particles is effectively avoided, the refractive index of a core material and the refractive index of a shell material are different, optimized enhanced optical performance is produced, and the shading performance is further improved.

Description

technical field [0001] The invention relates to the field of architectural coatings. Background technique [0002] As the people's requirements for interior and exterior decoration of buildings and living quality are increasing day by day, architectural coatings will develop in the direction of high performance, environmental protection and functionality. The more common green and environmentally friendly architectural coatings on the market mainly use water as a solvent. Compared with traditional organic solvent coatings, it reduces the pollution of organic solvents to the environment. Nano-titanium dioxide, or titanium dioxide, is one of the most expensive and energy-consuming raw materials in coatings. First, about 15% of the weight of general architectural coatings is titanium dioxide, accounting for more than 30% of the cost. The existing common rutile TiO2 is easy to agglomerate together during the drying process of the paint, and the distribution on the paint surface...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/10C09D7/12
CPCC09C1/3676C09C3/006C09D7/62
Inventor 张豪
Owner 温州市鹿城区中津先进科技研究院
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