Polymer Additives & Fillers

Compounders of plastics modify properties of a thermoplastic material by many other methods as well.Plastic compounds can be varied widely as to type and amount of these additives, and every modification produces a compound with different properties. Examples of thermoplastic products are polyethylene squeeze bottles, nylon gears and rollers, acrylic lenses, ABS (acrylonitrile-butadiene-styrene) business-machine and appliance housings, polystyrene-foam cups, polycarbonate safety helmets and glazing sheet for bus windows, and polyphenylene sulfide chemical pumps and automotive underhood components.

  • antimicrobials to control the build up of bacteria, Fungi and Algae on the surface
  • antioxidants for higher temperature stability
  • antistatics to prevent the build up of static electric charge
  • fibers are added to increase strength and stiffness
  • plasticizers for flexibility
  • lubricants for easier molding or for increasing adhesion and viscosity of the molded parts
  • UV stabilizers for resistance to sunlight
  • fillers for economy
  • flame retardants, smoke suppressants, and conductive fibers or flakes provide special properties for certain applications.

Additives also give specific properties to the finished products.

  • Polyolefins such as Polyethylene (PE) and Polypropylene (PP) are simpler polymer structures do use additives such as UV and heat stabilizers, antioxidants and in some applications flame retardants.
  • PVC is the most versatile of all plastics because of its blending capability with plasticizers, stabilizers and many other additives. This is important as all PVC polymers need heat stabilizers in order to be able to withstand the processing temperatures. Other additives are also used: rubbery polymers to give brittle PVC better impact strength, and fillers.
  • Additives and formulation with copolymers provide varying properties to Polystyrene, already available commercially in 1930s. Furthermore, processing and finishing may give off styrene vapour which is the main degradation product. Reactive degradation products from additives are also created in low concentrations.





Processing Aids



Blowing Agents

Air Release Agents

Antiblocking Agents

Antiblocking Concentrates

Antifogging Agents

Antioxidant Concentrates


Antistat Concentrates



Blowing Agents

  • Chemical Types
  • Concentrates
  • Physical Type

Catalysts and Curing Agents

  • Epoxy Catalysts
  • Epoxy Hardeners
  • Polyester Catalysts, Initiators
  • Polyester Inhibitors
  • Polyester Promoters, Accelerators
  • Urethane Catalysts
  • Urethane Cross linkers, Chain Extenders


  • Concentrates, Liquid or Paste
  • Concentrates, Solid
  • Dyes, pigments

Conductive Additives

Cooling-Water Treatment Chemicals

Coupling Agents

Crosslinking Agents

  • For Thermoplastics
  • Radiation Sensitizers

Degradation Promoters

Desiccant Additives


  • Microspheres (Hollow or Solid)
  • Mineral or Other Inorganic Type
  • Organic Type

Flame Retardants

  • Concentrates
  • Smoke Suppressants

Fragrance Additives


Heat-Distortion Modifiers

Impact Modifiers

Low-Profile Additives for SMC/MBC


  • Concentrates

Mold Releases

Nucleating/Clarifying Agents


Processing Aids

  • Mineral/Inorganic Type
  • Other Organic Types
  • Polymeric Type

Purging Agents Additive Type


  • Aramid Fiber
  • Carbon or Graphite Fiber
  • Ceramic Fibers
  • Continuous Fiber Rovings, Tows, Yarns
  • Discontinuous Fibers (Chopped, Milled, Staple)
  • Fabric, Mat, Veil, Felt
  • Glass Fiber
  • Mineral Fibers
  • Nylon or PET Fiber
  • UHMW PE Fiber

Release Agents

  • External (Spray or Wipe On)
  • Internal (Additive Type)

Resin Clean-up Solutions

Slip Agents

  • Concentrates


  • Heat Stabilizers for PVC
  • Metal Deactivators
  • UV Stabilizers
  • UV Stabilizers Concentrates

Stripping Agents, Resin Removers

Surface Treatment Chemicals and Dispersion Aids (for Fillers, Pigments, Reinforcements)


Thickeners for SMC/BMC

Thixotropic Agents

Viscosity Depressants