Types of PVC Plasticizer and Their Industrial Applications
At Evergreen Chemical Company Thailand, we specialize in the development and supply of high-quality additives for the plastics industry. Plasticizer are organic substances with various characteristics, whose main function is to intercalate the rigid polymer structures of materials such as PVC, allowing for easier movement and flexibility making them, more precisely, “plastics.” The presence of plasticizer in the PVC structure influences several specific physical-mechanical properties, in particular the elastic modulus, elongation at break, hardness, and flexibility at low temperatures.
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What are Plasticizer
Plasticizer are organic liquids added to plastics to increase flexibility and ease of processing while keeping their chemistry unchanged according to ECHA (European Chemicals Agency). They are most commonly used in PVC, turning rigid uPVC (used in pipes and window frames) into flexible PVC for cables, films, flooring, and automotive interiors.
Plasticization Methods
Plasticization makes plastics more flexible by adding suitable plasticizer. It occurs in two ways:
| Type of Plasticization | Description | Examples / Notes |
|---|---|---|
| Internal Plasticization | Achieved by copolymerizing monomers (e.g., vinyl acetate, vinylidene chloride) so that the plasticizer becomes part of the polymer chain. Provides permanent flexibility, but the process is complex and costly. | Used when long-term flexibility is required. |
| External Plasticization | The most common method where liquid plasticizers are blended into the polymer. | Allows easy adjustment of softness and flexibility. |
| └ Primary Plasticizer | Highly compatible; improves flexibility, elongation, and softness. Can make up to 50% of vinyl glove composition. | Common in flexible PVC applications. |
| └ Secondary Plasticizer | Used with primary plasticizers to reduce cost, adjust viscosity, or enhance low-temperature performance. | Examples include extenders like naphthenic oils or chlorinated paraffins. |
Where To Use PVC Plasticizer
PVC plasticizer have become an integral part of many everyday objects. You can find these small molecules in the majority of electric cables, pipes, conveyor belts, car parts such as dashboards and coatings, floorings and membranes for the construction industry and so on. PVC plasticizer are also used in many types of clothing, in particular in rubber footwear, as well as in the interior design or in tubs and containers for the food. Because of the wide use of PVC plasticizer in the objects that accompany us in our daily lives, their use in industry is strictly regulated by national laws and European regulations.
Models and Types of PVC Plasticizer
Nowadays there are hundreds of different types of PVC plasticizer, but not all are produced and used at a commercial level. Research in the field of synthesis of these organic compounds is constantly evolving, given the importance of their use in many construction and world trade fields. In some formulations, auxiliary agents such as potassium stearate are also incorporated to enhance compatibility, dispersion, or antistatic properties in PVC-based materials. Some examples of PVC plasticizer are represented by the following categories:
Plasticizer Phthalates
They are characterized by a particular ease of manipulation and gelation and a high efficiency and volatility; they are among the most used molecules in the field of plasticizer. Phthalates are used, in particular, in the production of electrical cables (also resistant to medium-high temperatures) for machines, electrical appliances, for the construction industry, floorings or metal surfaces.
Polymeric Plasticizer
Their main characteristic is the high migration resistance (both in contact with oils, fats and hydrocarbons, and with thermoplastic materials), a good resistance to high temperatures and a low volatility. They are used in the production of components for migration-resistant cables, tubes or membranes that come in touch with hydrocarbons, food oils and bitumen. Some stabilizers used alongside these include zinc stearate for thermal stability and process aid during extrusion.
Plasticizer Trimellitates
They are characterized by an excellent flexibility at low temperatures and high resistance to higher temperatures; they are molecules primarily used in the production of electrical circuit components, wiring cables, car interiors and machinery components used in the medical and scientific field. In certain sensitive applications, additives such as sodium stearate or Potassium stearate may also be added for enhanced emulsifying or antistatic properties.
PVC plasticizer play a fundamental role in determining the flexibility, durability, and overall performance of countless products used in our daily lives. From electrical cables and flooring materials to automotive interiors and food containers, the wide application of plasticizer highlights their industrial relevance. Additives like calcium stearate may also be incorporated in some formulations for lubrication or to act as a release agent. With ongoing advancements in organic compound synthesis and increasing regulatory oversight, the development of safer, more efficient, and environmentally friendly plasticizer continues to shape the future of modern materials. Understanding the types and functions of these additives is crucial for anyone involved in polymer engineering, materials science, or industrial manufacturing.