Acrylic acid modified vinyl organic silicon resin and preparation method thereof

Abstract

The invention belongs to the technical field of organic synthesis, and particularly discloses acrylic acid modified vinyl organic silicon resin and a preparation method thereof. The invention discloses a high-temperature-resistant adhesive which is prepared from the following components in parts by mass: 24 to 299 parts of vinyl organic silicon oligomer, 2 to 3 parts of acrylic acid, 120 to 130 parts of hydroxybutyl acrylate, 80 to 90 parts of butyl acrylate, 90 to 100 parts of 2-ethylhexyl acrylate, 160 to 170 parts of styrene, 2 to 3 parts of di-tert-butyl peroxide, 5 to 6 parts of 3-mercapto-1-propanol, 220 to 240 parts of xylene, and 210 to 230 parts of butyl acetate. The acrylic acid modified vinyl organic silicon resin is high in non-volatile matter content and low in viscosity, so that coating can be cured at room temperature and can also be heated and cured to form a film, and is widely applied to coating of weather-proof, anti-corrosion and anti-fouling equipment such as automobiles, bridges and engineering machinery.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to an acrylic acid-modified vinyl silicone resin and a preparation method thereof. Background technique [0002] Acrylic resin coatings have excellent adhesion, oxygen resistance, oil resistance, weather resistance, and many monomers, easy synthesis, and low price, so they have been widely used; however, their water resistance, heat resistance, permeability Poor and high surface tension. Silicone resin has Si-0-Si as the main chain, and Si-0-Si bond energy is much greater than C-C bond energy, so silicone has excellent high temperature resistance, oxidative degradation resistance, weather resistance and excellent hydrophobicity, good penetration rate. However, the high cost, poor adhesion and film-forming performance of silicone resin limit its further application. [0003] The properties of silicone resin and acrylic resin are quite different, and they are ...

AI Technical Summary

Problems solved by technology

The acrylic-modified silicone resin produced by the copolymerization reaction of silicone and acrylic compound has the advantages of hydrophobicity, stain resistance, and high and low temperature resistance of silicone resin and the adhesion and film-forming properties of acrylic resin. , and overcome the shortcomings of insufficient mechanical strength of silicone resin and poor long-term pollution resistance of acrylic resin

At present, there are mainly chemical modification and physical blending methods for organosilicon modified acrylic resins at home and abroad. The performance of products modified by physical methods is not as good as that of chemical methods in most cases, such as adding fluorine or Silicone-containing anti-pollution additives, because fluorine-containing or silicon-containing anti-pollution additives do not form chemical bonds with the main resin and migrate to the surface of the coating film to form low surface tension, so they have anti-fouling functions, but because they do not form chemical bonds with the main resin, they must only be Sacrificial anti-graffiti coatings, and fluorine-containing or silicon-containing anti-pollution additives will also migrate down to the surface of the coated substrate to reduce adhesion; Silicone coupling agent modified organic resins generally have very low silicon content and are not durable Pollution

Although acrylic polyurethane has certain anti-pollution properties, it cannot achieve long-term anti-pollution properties

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