Shamrock has successfully transitioned the major products in its current PTFE micro-powder portfolio towards REACH Compliance.
Shamrock Technologies Technical Service Group01.23.20
PTFE resin is made by the polymerization of TFE (tetrafluoroethylene monomer) to very high molecular weight (MW), in the millions. Low MW PTFE micro-powders are typically made by the degradation of such high MW PTFE resin. Degradation may be affected by thermal or radiation-induced processes, where the backbone carbon-carbon bond is broken to form an active free radical. In such thermal or radiation-induced degradation processes, there is a random distribution of varying chain lengths, and some small percent of the molecules may be 8 carbons long. One chemical property of the 8-carbon fluorinated molecule is that the reactive radical group can combine with oxygen and moisture in the air to form a terminal carboxylic acid group. This group results in Per-Fluoro-Octanoic-Acid (PFOA). The concentration of PFOA in the process of making PTFE micro-powder may be in the range of parts per million.
The European Union has put forth a regulation[i], requiring a limitation of no more than 25 p
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