Vinyl resin coating (code X) (referred to as vinyl resin paint) is a coating made of various polymer vinyl resins produced by petrochemical products . There are many kinds of vinyl paints (among them, perchlorethylene, acrylic and rubber paints are self-contained systems), most of which are volatile paints and have the characteristics of fast self-drying. Its composition, performance and use are different. According to different film-forming resins, it is divided into more than ten kinds, such as:
(1) Polyvinyl chloride resin coating. Polyvinyl chloride has fewer side groups in the structure. It has a compact structure and high chemical stability, but the resin solubility and adhesion are poor. There are fewer varieties of this kind of coating. Various colors of polyvinyl chloride enamel, mainly made of polyvinyl chloride resin dissolved in cyclohexanone, can be used for coating plastic products and enamel toys, etc.
(2) Chloride vinylidene chloride (chloride) copolymer resin coating. This kind of coating has the characteristics of high strength, low air permeability, flexibility, water resistance, cold resistance, chemical corrosion resistance, and flame retardant, but its light resistance and heat resistance are not good. Waterproof, fireproof and anti- corrosion . Chlorine partial emulsion coatings are mostly used in the construction industry.
(3) Vinyl chloride-vinyl acetate (chlorine vinegar) copolymer resin paint. Part of maleic anhydride the copolymerization of vinyl chloride for terpolymerization, which enhances the adhesion and solubility, and its weather resistance, water resistance, chemical corrosion resistance and mechanical properties are slightly better than perchlorethylene coatings. It can be used for coating of chemical equipment, instrumentation devices, ships and offshore structures requiring corrosion resistance and weather resistance .
(4) Polyvinyl acetate resin coating. Polyvinyl acetate latex paint is a water-dispersible paint made of vinyl acetate monomer through emulsion polymerization. It has good color retention and adhesion, and can be used as interior wall paint. The performance of copolymer emulsion coatings with vinyl acetate as the main body has been improved, such as vinyl acetate acrylic copolymer emulsion paint, vinyl acetate-butene acetate copolymer emulsion paint, etc.
(5) Polyvinyl acetal resin coating. Polyvinyl acetal resin is produced by hydrolyzing polyvinyl acetate with methanol under the action of an acidic or basic catalyst to produce polyvinyl alcohol, and then condensing with aldehyde. Factors affecting the properties of polyvinyl acetal resin are: relative molecular weight, degree of hydrolysis, type of aldehyde, degree of acetalization. The types include polyvinyl formal resin, polyvinyl formal acetaldehyde resin and polyvinyl butyral resin. This kind of coating has good adhesion, flexibility, light resistance and heat resistance, etc., and is suitable for light metal and capacitor coating. When preparing coatings, polyvinyl acetal resin is often combined with phenolic resin and amino resin to make insulating paint, capacitor paint, and anti-rust pigments to make phosphating primer.
In addition, vinyl resin paints include polystyrene tar resin, polyvinyl acetylene resin, polypolyene resin , fluorine-containing vinyl resin, chlorinated random polypropylene resin paint and other varieties. In recent years, high chloride polyethylene (HCPE) resin coatings have been developed in CHINA. High chlorine polyethylene resin with a chlorine content greater than 65% has excellent weather resistance, ozone resistance, flame resistance, oil resistance and chemical resistance. High-chlorinated polyethylene is brittle and has poor adhesion, so it should not be used alone for coatings, but should be modified with other resins. The modified high chloride polyethylene coating has excellent mechanical properties, weather resistance, gloss retention, abrasion resistance, flame resistance, biological corrosion resistance and good dielectric properties, and is a new anti-corrosion coating Variety.
