Epoxy vinyl ester resin has excellent functions in anti-corrosion, people know it more from anti-corrosion. In fact, the application of epoxy vinyl resin is far from anti-corrosion, it is more widely used in related fields. At present, vinyl ester resin is mainly used in corrosion resistance, land and sea transportation, electrical insulation and radiation curing technology. In applications such as chemical anti-corrosion equipment, vinyl ester resin has good acid resistance and alkalinity, and is widely used-epoxy vinyl resin is far from anti-corrosion.
Experts said that in chemical anti-corrosion equipment and other applications, vinyl ester resin has good acid resistance and alkalinity. The side hydroxyl groups on the resin molecules have good adhesion and permeability to the glass fiber, so it provides good protection for the glass fiber and can give full play to its high strength performance, while avoiding the shortcomings of insufficient corrosion resistance, plus resin extension High rate, good toughness, reduced damage during transportation and installation, better application effect than other resins, can be used for manufacturing chemical storage tanks, pipes, containers, hoods, chimneys, absorption towers, scrubbers, etc., which are widely used. For example, a sulfur dioxide scrubber with a diameter of 4.17m and a height of 3.05m in a pulp mill is made of vinyl ester resin and can be used at 82°C for a long time. The smelter uses flame retardant vinyl ester resin to make a chimney with a diameter of 3.43m and a height of 122m. It is stacked with a 13.7m long fiber winding tube and installed in a cement chimney. It is still intact for 10 years without damage and cracks during installation. Products made with phenolic epoxy vinyl ester resin have good corrosion resistance, solvent resistance and high temperature resistance, and the equipment made with them has been used at high temperature (140°C) for more than 10 years. It is also widely used in industrial wastewater and tanks and pipelines containing hydrochloric acid contaminants. For example, the inner wall of a large corrosion-resistant trailer tank is made of this resin, and the outer wall is flame retardant resin. The effect is good.
As early as 1978, vinyl ester resin was used in the manufacture of winding pipes in a paper mill. The pipeline transports wastewater with a temperature of 40°C, a pressure of 0.69 MPa, and a pH of 5 to 9.5 to a wastewater treatment plant half a mile away. After the pipeline is completed, no leakage has occurred. The resin is also commonly used in high-temperature chlorination equipment or caustic alkali purification and storage equipment, such as industrial waste treatment plants containing various solvents in sulfonation plants and solvent extraction plants in mining. Other applications include lining of hydrochloric acid transport tank cars and rail cars , Oil and gasoline storage tanks and lining. The world's largest cleaning alcohol factory uses pipes made of vinyl ester resin from the Shell factory. The corrosive liquid with a temperature of 50 to 60°C and a pressure of 0.55MPa is 6.1km long. There is also a storage tank of the same material with a diameter of 4m and a height of 6.1 There are 15 m in total, and since it was built in 1978, no pipe grooves need to be repaired. An anti-pollution facility built in Pennsylvania, USA, uses a vinyl ester resin-lined steel absorption tank for the absorption and treatment of high-sulfur waste gas. There has been no abnormality since its construction.
The development and application of industrial pumps and valves is another important point. As early as the early 1980s, vinyl ester resin was used to develop a full-plastic pump for corrosive environments. It can withstand fatigue for more than 50 million cycles and a temperature of 95°C. It is suitable for the use of various corrosive fluids. All pump parts that are in contact with the corrosive fluid are made of glass fiber reinforced vinyl ester resin by compression molding or resin transfer molding (RTM). Texas—The refinery uses a vinyl ester resin pump to deliver 5% sulfuric acid liquid, which can continue to be used after 12 hours and 6 months of operation every day. However, the 316 stainless steel pump has been severely damaged after only 10 days of operation. For valve parts, vinyl ester resin is used, and more than 50% of graphite fiber and graphite filler are added to manufacture the lining of valve parts and ball valves for the chemical industry. This type of vinyl ester resin valve replaces Teflon-lined metal alloy valves and is used in an environment resistant to acids, alkalis, and solvents within a range of 20°C