DOP And DOTP | JCT Machinery

1. Chemical Structure Source

DOP (Di(2-ethylhexyl) phthalate): a diester compound generated by the reaction of phthalic acid and 2-ethylhexanol.

DOTP (Di(2-ethylhexyl) terephthalate): a diester compound generated by the reaction of terephthalic acid and 2-ethylhexanol. The molecular structure of terephthalic acid is different from that of phthalic acid, the latter is symmetrical, while the former is asymmetrical.

2. Plasticizing Effect

DOP: Due to its good plasticizing properties and low cost, DOP is often used in PVC products that require lower ciscosity, such as cable sheaths, flooring, films and packaging materials.

DOTP: Due to the use of terephthalic acid, its plasticizing effect is similar to that of DOP, but DOTP generally exhibits better low-temperature stability and heat resistance, and is suitable for applications requiring higher temperature tolerance and long-term stability.

3. Physical and Chemical Properties

DOP: It has good solubility and good plasticizing properties, and is usually a transparent liquid at room temperture.

DOTP: Compared with DOP, DOTP has lower volatility, better low-temperature fluidity, and less impact on the environment, especially its stability in low and high temperature environments.

4. Application Areas

DOP: DOP is widely used in PVC products, such as cable sheaths, plastic pipes, floors, wallpapers, medical devices, plastic films, etc.

DOTP: DOTP is mainly used for products that require low volatility and high-temperature stability, such as cable sheaths, PVC floors, industrial films, automotive interior materials, etc. It is also often used in occasions with high environmental protection requirements, such as toys, children's products, etc.

5. Price

DOP: It is relatively cheap, with mature production technology and low cost.

DOTP: The price is generally higher than DOP, because the terephthalic acid used in DOTP is more expensive and the production process is relatively complicated.