PVC heat stabilizers are mainly used for PVC and other chlorine-containing polymers. It has been found that PVC plastic can only be processed and molded at a temperature above 160°C, and it begins to thermally decompose at 120~130°C, releasing HCl gas. If the production of HCl is not suppressed, the decomposition will be further aggravated. This problem has been a problem. The main problems in the development and application of PVC plastics. Research has found that if PVC plastic contains a small amount of impurities such as lead salts, metal soaps, phenols, aromatic amines, etc., it will not affect its processing and application, and can delay its thermal decomposition to a certain extent. Generally classified according to the chemical composition of the heat stabilizer, it can be basic lead salt, metal soap, organotin, epoxy compound, phosphite, polyol, etc. According to the effect, PVC stabilizers can be divided into main stabilizers and auxiliary stabilizers. The auxiliary stabilizer itself has only a small stabilizing effect or no thermal stabilizing effect, but it has a synergistic effect when used with the main stabilizer; the main stabilizer is generally a metal-containing heat stabilizer. Pure organic compounds such as epoxy compounds, phosphites, and polyols are generally used as auxiliary stabilizers.
Because it is often necessary to use multiple PVC heat stabilizers at the same time to achieve good stability of polyvinyl chloride, some commercial PVC stabilizers are compounded by multiple ingredients to become composite stabilizers, such as barium cadmium stabilizer, barium zinc stabilizer These composite stabilizers are usually added with lubricants and other additives needed for PVC processing to facilitate the use of users. There are many types of compound stabilizers, including powder, paste, and liquid. 3-Mercaptopropionic acid is used as the raw material of vinyl chloride stabilizer to make organotin stabilizer to prepare colorless and transparent polyvinyl chloride products.
3-Methylbenzoic Acid factory told us that the development of PVC stabilizers has brought a lot of convenience to our lives. The development of each additive will derive PVC products that affect our lives. The PVC material is polyvinyl chloride, which can be used everywhere in our lives. Seen, make anti-corrosion pipelines, pipe fittings, oil pipelines, centrifugal pumps and blowers, etc. Polyvinyl chloride hard boards are widely used in the chemical industry to make various storage tank linings, corrugated boards of buildings, door and window structures, wall decorations and other construction materials. Due to its excellent electrical insulation performance, it can be used to manufacture plugs, sockets, switches and cables in the electrical and electronic industries. In daily life, PVC is used to make sandals, raincoats, toys and artificial leather. These PVC products affect all aspects of our lives.