Who knows suppliers for with difficulty inflammable PMMA Granualt for the extruding of disks. Standardization according to DIN 4102, class B2. who knows suppliers of additives, in order to equip PMMA according to this standard flame resistantly?
Check out ATOHAAS (formerly ROHM & HAAS) as one of the leading producers of PMMA (Oroglas/Altuglas). As far as I know, they have a new highly-transparent flame-retardant grade on the market now. Their products are also available through GE-Polymerland.