Method for preparing surface lyophobic oleophobic protection treatment agent

Abstract

The invention relates to the preparation of a stone protection treatment agent and aims to provide a method for preparing a surface lyophobic oleophobic protection treatment agent. The method comprises the following steps: mixing butyl titanate with absolute ethyl alcohol; slowly adding the mixture into an acid hydrolyzing solution; reacting for 1-12 hours at 50 DEG C, thereby acquiring a particle type nanometer titanium dioxide sol; adding a silane coupling agent and performing hydrolytic-polymeric reaction for 1-24 hours under a water-bath condition at 30-80 DEG C, thereby acquiring a compound sol; adding perfluor monomer, acrylate organic matter, amide organic matter and azodiisobutyronitrile, and then reacting for 2-10 hours under a water-bath condition at 70 DEG C; cooling to 40 DEG C and then adding a mixed solvent of ketone and alcohol; and stirring for 2 hours, thereby acquiring the surface lyophobic oleophobic protection treatment agent. After the protection treatment agent is coated on the surface of stone, the nanometer titanium dioxide permeates through the surface of the stone and is firmly loaded on the surface, thereby increasing the micro surface roughness of the stone, enhancing the lyophobic oleophobic property of fluoro acrylic copolymer, endowing the stone with ultra-lyophobic oleophobic surface property, and achieving a water-contacting angle being 147 DEGC.

Description

technical field [0001] The invention relates to the preparation of a stone protective treatment agent, in particular to a preparation method of a surface hydrophobic and oil-repellent protective treatment agent. Background technique [0002] Natural stone has good fire resistance, high compressive strength and noble and elegant decorative effects, and is widely used as wall, ground materials, stone towers, stone bridge stone carvings and other decorative materials. However, due to the structural characteristics of the stone itself and various external factors, phenomena such as white blooms, water spots, rust, and stains often appear during construction and use, which affect the decorative effect and even the service life. Hydrophobic treatment of the surface of stone is currently a common technical means to solve the above problems. The protective treatment agents used mainly include paraffin wax, acrylic resin and silicone protective agent. At present, the commonly used s...

AI Technical Summary

Problems solved by technology

At present, the commonly used stone protective agents in China are mainly paraffin or acrylic resins. These protective agents have the disadvantages of poor air permeability and durability. Although silicone protective agents have greatly improved their durability, they are also There is a deficiency of poor solvent resistance

And generally speaking, most of the treatment agents currently used for stone protection only emphasize the waterproof function, and their hydrophobicity needs to be further improved, and for some specific use environments, the treated stone is still not ideal in terms of oil stain resistance

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