Environment-friendly composite plasticizer and preparation method

Abstract

The invention discloses a plasticizer and a preparation method, in particular an environment-friendly composite plasticizer which is based on a diethylene glycol dibenzoate type plasticizer and di(2-ethylhexyl) terephthalate and can comprise epoxy compounds, adipate compounds, dicaprate compounds and trimellitate compounds. The environment-friendly composite plasticizer can be used as a main plasticizer of polyvinyl chloride resin and other resins. The invention also relates to a preparation method of the environment-friendly composite plasticizer and ingredients thereof, namely the diethylene glycol dibenzoate type plasticizer and the di(2-ethylhexyl) terephthalate. The environment-friendly composite plasticizer has the characteristics of high intermiscibility, plasticizing efficiency, cold resistance, heat resistance, pollution resistance, extraction resistance, migration, electric insulation, light and heat stability and the like, and is widely applied in plasticizing industry.

Description

technical field [0001] The invention relates to a chemical plasticizer and a preparation method, which can be used as an environment-friendly composite plasticizer as the main plasticizer of polyvinyl chloride (PVC) and other resins. technical background [0002] Plasticizers are the largest additives in the modern plastics industry, accounting for 60% of the total output of plastic additives. Among them, phthalates as plastic plasticizers account for more than 50% of the market share of plasticizers. Dioctyl phthalate (DOP), as the main plasticizer, was suspected of carcinogenicity by the National Cancer Institute (NCI), and its use was restricted. People are looking for and researching alternatives that are safer and perform better than DOP. Diethylene glycol dibenzoate (DEDB) and bis(2-ethylhexyl) terephthalate (DOTP) are the two most common environmentally friendly plasticizers, which can replace DOP as the main plasticizer , has the value of promotion and application....

AI Technical Summary

Problems solved by technology

Among them, DEDB plasticizer has large molecular weight and molecular polarity, good compatibility with PVC resin, high plasticizing efficiency, good pollution resistance and durability, but its melting point is low, it is solid in winter, and it is inconvenient to use

DOTP is an isomer of DOP. Due to the difference in structure, it has better electrical resistance, heat resistance, extraction resistance, and migration resistance than DOP, but its plasticizing performance is lower than DOP.

Other plasticizers such as epoxies, aliphatic polybasic esters, trimellitates, etc., all have their own unique properties, but they have not been widely used due to their poor compatibility with resins.

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