What is the Composition of Plasticizers
The plasticizer refers to an organic substance capable of increasing the plasticity of the plastic, improving the flow ability of the resin during molding, and making the article flexible. It is usually some high boiling,hard to volatile viscous liquid or low melting point of the solid, generally do not react with the plastic chemical.
Plasticizer must first have good compatibility with the resin, the better the compatibility, the better the plasticizing effect. Adding a plasticizer reduces the glass transition temperature of the plastic, making the hard and rigid plastic soft and pliable. Generally requires plasticizer colorless, non-toxic, odorless, light, heat, cold, volatile and small mobility, non-combustible and chemical stability, cheap and easy to get. In fact, a plasticizer can not meet all of the above requirements.
Plasticizer based on its role in the main plasticizer, that is, solvent-based plasticizer; auxiliary plasticizer, that is, non-solvent-based plasticizer; catalyst-based plasticizer; according to its chemical structure is divided into phthalates , Fatty acid esters, phosphates, polyesters, epoxy esters, chlorine-containing compounds and the like. Commonly used plasticizers are dibutyl phthalate (DBP), dioctyl phthalate (DOP), epoxy soybean oil, tricresyl phosphate, triphenyl phosphate, dioctyl sebacate, Chlorinated paraffin and so on. PVC is the main end user of these plasticizers. The main application areas of plasticizers added PVC are wire, cable, floor and wall veneer, building materials, automotive and packaging materials.