Coupling Agents

So-called "coupling agents" are used to provide better mechanical properties to filled plastic materials. The additive contains a multitude of two different types of functional groups. One type of these groups is capable of developing a bond on the fillers being used, while the other type reacts with the surrounding polymer matrix. This significantly increases the interaction between the filler particles and the plastic material, which leads to significantly improved physical properties such as E-modulus, flexural strength, and compressive strength. In some cases, the additives can also be used to improve the coating adhesion on various substrates.

AdditiveCompositionNon‑volatile matterApplication
BYK‑C 8000Reactive copolymer with functional groups18 %Radical curing systems, polymer concrete, and solid surfaces, as a metal/glass adhesion promoter in coatings
BYK‑C 8001Copolymer with surface-active groups> 90 %Glass-fiber reinforced epoxy resin systems
BYK-C 8002Reactive copolymer with filler-affinic groups30 %ATH-filled acrylate systems
BYK-C 8003Mixture of surface-active substancesn.a.coupling agent for improving the mechanical properties of glass fiber reinforced, radical curing systems based on unsaturated vinylester and polyester resins
BYK-C 8013Solution of a copolymer with functional groups> 90 %coupling agent to increase the mechanical strength of carbon
fiber-reinforced, radical-curing systems

These days, plastics are used in a multitude of structures, e.g. to reduce weight in the automotive industry. In order to compensate for the lower mechanical strength when compared, for example, with metal, these plastics are reinforced with fibers. The better and the more evenly these fibers are incorporated into the polymer matrix, the greater the performance of the reinforced plastic and its mechanical properties.

SCONA plastic modifiers are produced using a patented solid-phase grafting, enable a better distribution of the fillers in the polymer matrix and increase the mechanical bonding. This facilitates the compounding and increases the mechanical strength.

  • Wood Plastic Composites (WPC)
  • Glass-fiber reinforced PP, PA
  • Impact modification of PA, PET
  • TPE-S overmolding

Detailed information about SCONA plastic modifiers and their application possibilities can be found on the page Additives for Thermoplastics.

Glass fibers in polypropylene and their integration into the PP matrix

Glass fibers in polypropylene and their incorporation into the PP matrix
Glass Fibers in PolypropyleneBetter Incorporation in the PP Matrix
when using SCONA Coupling Agents