VINNAPAS® Composites - Wacker Chemie AG

VINNAPAS® Composites

Solid Resins for Composites

VINNAPAS®solid resins (polyvinyl acetate) are low-profile additives which reduce shrinkage to a minimum and provide perfect surfaces. The broad portfolio offers you a high degree of formulation freedom because the individual VINNAPAS® grades combine well with each other, thus providing optimum solutions for a variety of requirements relating to processing, the target system (base resin) and desired end properties.


As additives for composites, VINNAPAS® solid resins improve the properties of the final result:

  • Excellent sheen and surface smoothness
  • Good mechanical properties
  • Shrinkage reduced to below 0.05 % in the production of Class A surfaces
  • Thickening effect in SMC applications
  • Reduced deformation and tension in polyester-resin components
  • Enhanced adhesion to many substrates, such as paper, cardboard, wood, leather, glass, metal and plastic

These additives also improve processing:

  • Quick and complete solubility in styrene
  • Ease of processing

Main Applications:

  • Bulk molding compound
  • Pultrusion
  • Resin transfer molding
  • Sheet molding compound