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Dioctyl Phthalate (DOP) is a plasticizer used in the production of flexible polyvinyl chloride (PVC) plastic. Dioctyl Phthalate is one of the most widely used plasticizers in PVC due to its low cost. DOP is a general-purpose plasticizer and long-time industry standard known for its good stability to heat and ultraviolet light, and broad range of compatibility for use with PVC resins. Dioctyl Phthalate can also be used as dielectric and hydraulic fluids. DOP is also a solvent for many chemicals, such as in glowsticks.
Application areas of PVC plasticizers
PVC plasticizers are mainly used in the production of a variety of soft PVC products, such as films, sandals, hoses, artificial leather, cable materials and so on. As the addition of plasticizers can significantly improve the processing performance and flexibility of PVC, making these products in the application of better performance
To sum up, the principle of PVC plasticizers is to weaken the intermolecular forces, increase the mobility of molecular chains, so as to improve the processing performance and flexibility of PVC.
USES:
Customer Case
Zimbabwe pvc paste resin for glove coating, waterproof tarpaulin, PVC paste resin as raw material, need plasticizer\
General purpose grade
Widely used in plastics, rubber, paint and emulsifier industries. PVC plasticized with it can be used in the manufacture of artificial leather, agricultural films, packaging materials, cables and so on.
ELECTRICAL GRADE
In addition to all the properties of general-purpose grade DOP, it also has very good electrical insulation properties and is mainly used for the production of wires and electricity.
Food Grade
Mainly used in the production of food packaging materials.
Medical grade
It is used for the production of medical and hygienic products, such as disposable medical instruments and medical packaging materials.
| Parameter | Value/Description |
|---|---|
| Chemical Name | Dioctyl Phthalate (DOP) |
| CAS Number | 117-84-0 |
| Molecular Formula | C24H38O4 |
| Molecular Weight | 390.56 g/mol |
| Appearance | Colorless to pale yellow transparent oily liquid |
| Purity | ≥99.5% |
| Density (20°C) | 0.980-0.985 g/cm³ |
| Boiling Point (1 atm) | 386-389°C |
| Flash Point | 215°C (Open Cup Method) |
| Refractive Index (20°C) | 1.483-1.487 |
| Viscosity (25°C) | ~70-80 mPa·s |
| Acid Value (mg KOH/g) | ≤0.1 |
| Moisture Content | ≤0.1% |
| Solubility | Soluble in most organic solvents (e.g., toluene, ethanol); insoluble in water |
| Applications | PVC plasticizer, rubber softener, coatings, adhesives, cable materials |
| Storage Conditions | Store in a dark, sealed, cool, and dry place (recommended temperature <30°C) |
| Packaging | 200kg/drum (galvanized iron drums or plastic drums) |
| Safety Information | Avoid skin/eye contact; complies with RoHS, REACH, and other regulations |
| Property | Unplasticized PVC | DOP-Plasticized PVC |
|---|---|---|
| Tensile Strength | High (rigid & brittle) | Reduced (flexible) |
| Elongation at Break | Low (<10%) | Significantly higher (>200%) |
| Low-Temp Resistance | Poor (high embrittlement temp) | Improved (embrittlement temp ↓) |
| Processing Temp | High (180-200°C) | Lower (150-170°C) |
Definition: a common general-purpose plasticizer
Principle
1. Plasticizing is an important method of polymer modification, for example, the flow temperature of PVC is close to the decomposition temperature, molding is often added 30 to 50% of dibutyl phthalate, which can reduce its flow temperature and melt viscosity to facilitate processing. Can also improve its cold resistance, impact resistance, made of soft plastic products (film, tape, artificial leather, etc.).
2. The principle of PVC plasticizer is mainly through the weakening of polychloroethylene PVC molecules between the secondary valence of Jian, that is, van der Waals force, thereby increasing the mobility of the molecular chain, reduce the crystallinity of the polymer, and ultimately achieve the effect of plasticizing. Plasticizers are inserted between the PVC molecular chains, weakening the intermolecular forces and increasing the mobility of the polymer molecules, thus improving the processing performance of PVC and the flexibility of the products.
3.Mechanisms of PVC plasticizers
1) Weakening the intermolecular forces: Plasticizers work by weakening the van der Waals forces between PVC molecules, so that the interaction force between molecular chains is weakened, and the movement of molecular chains becomes easier, thus reducing the hardness, modulus and softening temperature of the polymer, and improving the elongation, curvature and flexibility.
2) Reducing the viscosity of the melt: the addition of plasticizers can reduce the PVC melt's viscosity of the PVC melt, making it easier to process. Plasticizer molecules contain polar groups and non-polar parts, the polar groups and the part of the PVC molecular chain dipole attraction occurs, the non-polar part of the molecular chain will be separated, increasing the spacing between them, further weakening the attraction between the molecular chain .
3) Improved processability and flexibility: the addition of plasticizers makes PVC in the The addition of plasticizers makes PVC easier to shape during processing, and the flexibility of the products is also significantly improved. For example, in PVC soft products, an average of 40-50 parts of plasticizer are added per 100 parts of resin .
Weifang Phoenix New Material Co., Ltd
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