It normally come from additives such as
Brominated flame retardant rather than the resin itself.
Any resin/compound that complies to RoHS requirements should meet your requirement. Check with your suppliers - ask for a copy of lab report/analysis.
Traditionally, the hardware and electronics industry has preferred to use brominated flame retardants such as polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), hexabromocyclododecane (HBCDD) and tetrabromobisphenol-A (TBBA).
Add to what Harry mentiones .....
Halogen-free flame retardants
A number of halogen-free flame retardants are now becoming commercially available. Some of the main alternatives which are applicable to different polymer types used in the electronics industry are summarised here.
Halogen-free flame retardants applicable to different polymer types used in the electronics industry.
1) Halogen-free flame retardant :Aluminium trioxide
2) Applicable polymer types :Epoxy, ABS, HIPS, PC, EVA, XLPE
{ READ RESPECTIVELY 1) Halogen-free flame retardant 2) Applicable polymer types }
1) Magnesium hydroxide.
2) Epoxy, ABS, HIPS, PC, nylons, PVC, EVA, XLPE
1) Magnesium carbonate.
2) ABS, HIPS, PC, PVC, EVA, XLPE
1) Zinc borate.
2) Epoxy, nylons, PVC, EVA.
1) Zinc hydroxystannate.
2) PVC, EVA.
1) Zinc stannate.
2) Epoxy, nylons, PVC.
1) Red phosphorous.
2) Epoxy, phenolic, nylons.
1) Ammonium polyphosphate.
2) Epoxy
1) Phosphate esters.
2) Phenolic, ABS, HIPS, PC, PVC, EVA.
1) Melamine derivatives.
2) ABS, HIPS, PC, nylons
1) Reactive P-N.
2) Epoxy
You may be also interested to see ..
http://www.halogenfree.org/