This is mainly a casting process, using a special mixing equipment to obtain a homogeneous distribution of the quartz, sand or CaCO3 particles in the polyester resin. It is often possible to extract air from the finished product via vacuum process.
The mix is then casted in a mold and shortly put on a trembling table to release air and to compact the formulation.
The cure should be as fast as possible. Mostly just before the peak exotherm the product is demolded.The rest of the production line the product is left to fully cure.
The cure is done at ambient temperature using cure systems based on Methyl ethyl ketone peroxide (MEKP), like Butanox® M-50, or Acetyl acetone peroxide (AAP), like Trigonox® 44B. Mixtures of these two are quite often the preferred method, as they use the optimal properties of both in producing an excellent cured product. The productivity can be increased by the use of the special accelerator like for example Accelerator 553S or by using a promoter.
Polymer concrete is used in many applications, the most common examples are sewer gutters, door steps, wall and facade panels and window sills.
|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|