Sheet Molding Compound (SMC) and Bulk Molding Compound (BMC) are intermediate products which are finally pressed to end products in the hot press at temperature in the range of 150°C, so called Hot Press Molding. During pressing it is possible to use an in-mold coating to finish the exterior of the product during the curing step.

AkzoNobel curing agents

The SMC/BMC material is prepared with a combination of peroxides and inhibitors to secure sufficient shelf life during storage, while at the same time providing high-reactivity and efficient curing during pressing, leading to low residual styrene levels and high-surface quality.

The main peroxides used in SMC/BMC are Trigonox® 21S in combination with Trigonox C or Trigonox 22-C50.

Alternatively one can choose Trigonox 21LS, which allows for longer storage stability of the SMC/BMC or Trigonox 141 for high reactivity or Trigonox BPIC-C75 for a more smooth cure.

For PMC (in-mold Powder Coating), Perkadox® 14 and Perkadox BC are used which are reactive at high curing temperatures.

Main products

The end products are very diverse and include components for the automotive, electrical and building industry.

Related products

Product groups Characteristics Main applications
Organic peroxide curing agent Unsaturated polyester, vinyl ester and (meth)acrylate resin curing systems
Butanox The world’s leading MEKP brand for the polyester composite industry
Accelerators For thermoset composites
Promoters and inhibitors For thermoset composite curing