Polytrifluoropropyl-methyl-siloxane-coated titanium dioxide composite material as well as preparation method and application thereof

Abstract

The invention discloses a polytrifluoropropyl-methyl-siloxane-coated titanium dioxide composite material as well as a preparation method and application thereof. The titanium dioxide composite material comprises TiO2 ultrafine particles. The surfaces of the TiO2 ultrafine particles are coated with a polytrifluoropropyl methyl siloxane organic film layer to form a core-shell structure. In addition,the preparation method comprises the following steps: preparing a fluorosilanol alkali metal prepolymer; adding TiO2 ultrafine particles, the remaining 1, 3, 5-trimethyl-1, 3, 5-tri (3, 3, 3-trifluoropropyl) cyclotrisiloxane and an accelerant to prepare the titanium dioxide composite material. The titanium dioxide composite material having advantages of high whiteness, good weather resistance, good dispersity, strong ultraviolet absorption capacity, hydrophobicity, oleophobicity and the like can be applied to cosmic product preparation widely and has the great application value and broad application prospects; moreover, the preparation method is simple and is operated conveniently; the reaction is controllable; the titanium dioxide composite material is suitable for large-scale preparation; and the polytrifluoropropyl-methyl-siloxane-coated titanium dioxide composite material is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a titanium dioxide composite material coated with polytrifluoropropylmethylsiloxane, a preparation method and application thereof. Background technique [0002] TiO 2 It is an important white inorganic pigment, because of its excellent reflection and scattering of ultraviolet rays, chemical stability and thermal stability, high whiteness and gloss, good dispersibility and weather resistance, high decolorization power and hiding Powerful, safe and non-toxic, it is widely used in sunscreen skin care products, pressed powder, foundation cream, liquid foundation, lip beauty products, eye beauty products, nail beauty products and other cosmetics. But untreated TiO 2 Ultrafine particles have a large specific surface area and high surface energy, showing strong hydrophilic and oleophobic properties, resulting in easy aggregation, poor compatibility and dispersion in organic ...

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Problems solved by technology

Among them, the coupling agent can be combined with TiO through the groups at both ends of the coupling agent. 2 Inorganic powders and organic polymers undergo chemical reactions to form strong chemical bonds, and TiO 2 The combination of two materials with large differences in properties with the organic matrix has attracted widespread attention. At present, the most widely used coupling agent is the silane coupling agent, which can endow the addition of TiO 2 The cosmetic coating film of particles has a hydrophobic effect, but it is lipophilic, and can absorb the oil secreted by the skin and destroy the makeup, and the coupling agent can only be used in TiO 2 The surface forms a single layer of coating, which cannot completely cover TiO 2 Photochemically active sites on the surface of particles; polymer encapsulation can 2 A film layer with a certain thickness is formed on the surface of the particles, but most of them are distributed on the TiO in a physically entangled manner. 2 Particle surface, easy to fall off due to weak binding force

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