"It was great!" Mr. Renegar said of the first meeting in Brussels. Recycled carbon black is a unique material, he added, which necessitates separate standards from conventional carbon black.
"Pyrolysis is not new to the marketplace, but there were no real guidelines that customers or suppliers could use," Mr. Renegar said. "rCB is not the same as carbon black, and not all the tests for carbon black can be used for rCB."
Whereas traditional carbon black is 99.9-percent carbon, rCB ranges from 88- to 90-percent carbon, according to Mr. Renegar. The material's uses depend on application, acting as a supplemental material in some cases and as a replacement for conventional carbon black in others, he said.
The purpose of D36, according to Mr. Cole, is to bring together a group of people who want to clarify standards for rCB and develop their own testing for the material.
"It will be a lot like D24 — I think that's where we will end up," he said.
Messrs. Cole and Renegar agreed that traditional carbon black manufacturers have no interest in developing standards for rCB.
The next meetings for D36 are scheduled for June 15 in Toronto; Dec. 6 in New Orleans; June 28, 2018, in San Diego; and Dec. 6, 2018, in Washington, D.C.