Preparation method of ageing-resistant and ultraviolet-resistant external wall coating added with gallic acid

Abstract

The invention discloses an ageing-resistant and ultraviolet-resistant external wall coating added with gallic acid, which is characterized by being prepared from the following raw materials in parts by weight: 30-33 parts of silicone acrylic emulsion, 9-12 parts of water-based epoxy resin, 4.5-6 parts of activated palygorskite powder, 3-5 parts of polyvinyl alcohol, 2-3 parts of pregelatinized starch, 2.5-4.5 parts of antimony trioxide, 3-4.5 parts of hydrolyzed starch, 8.5-10.5 parts of coarse whiting, 1-1.5 parts of isocyanate, 1-1.5 parts of heptadecanoic acid, 2-3 parts of gallic acid, 4-6 parts of glass fiber, 6-8 parts of modified round grain mortar and 25-30 parts of water. According to the coating, gallic acid is added, so that the coating has oxidation-resistant and ultraviolet-resistant effects; the coating is matched with the epoxy resin, so that the mechanical property of the coating can be improved; the modified round grain mortar is added, so that the coating is light in weight, pleasant in smell, good in dispersion property, good in waterproof property, attractive and elegant, and the strength of the coating is improved; and the coating is simple to operate and good in controllability, and has good toughness and covering power.

Description

technical field [0001] The invention relates to a paint and a preparation method thereof, in particular to an anti-aging and anti-ultraviolet exterior wall paint added with gallic acid and a preparation method thereof. Background technique [0002] Gallic acid is also known as gallic acid and gallic acid, and its chemical name is 3,4,5-trihydroxybenzoic acid. It generally exists in gallnuts, oak bark, tea and pomegranate in the form of tannins. It is an important food in our country. Natural renewable resources are widely used in chemical, pharmaceutical, food, fuel, light industry and electronics industries. Gallic acid can be used to make a variety of fuels, flame stabilizers, blue-black inks and flute agents. It can be used as a plant growth regulator, combined with vitamin C as a strengthened bait for fish farming, and it is also an ultraviolet absorber and flame retardant. Therefore, the present invention adds gallic acid with ultraviolet absorbing effect to the coatin...

AI Technical Summary

Problems solved by technology

However, the density of round sand is high, adding it to the paint and spraying it on the outer wall will increase the weight of the building, and there is a danger of falling off the wall due to wind and sun, and it will also affect the dispersion of the paint.