Requirements on Latices

The latices used for coating must meet the following requirements on the residual monomer content.

Substances

Content [ppm]

Styrene

200

4-PCH

200

Ethylbenzene

50

4-VCH

50

For the individual substances styrene and 4-PCH, the limit value is 200 mg/kg of latex, and for ethylbenzene and 4-VCH, the limit value for each is 50 mg/kg of latex. The limit value of the sum for all 4 components is 400 mg/kg of latex.

Vulcanisation accelerants

For the manufacture of foam coatings, there is a ban on the use of the vulcanisation accelerator Zn-diethyldithiocarbamate (ZDEC).