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U.S. Department of Health and Human Services

Inventory of Effective Food Contact Substance (FCS) Notifications

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FCN No. 17

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Food Contact Substance:  A perfluorocarbon-cured elastomer (PCE) produced by terpolymerizing tetrafluoroethylene (CAS Reg. No. 116-14-3), perfluoro(2,5-dimethyl-3,6-dioxanone vinyl ether) (CAS Reg. No. 2599-84-0) and perfluoro (6,6-dihydro-6-iodo-3-oxa-1-hexene) (CAS Reg. No. 106108-22-9) and subsequent curing of the terpolymer (CAS Reg. No. 106108-23-0) by crosslinking with triallylcyanurate (CAS Reg. No. 101-37-1) and vulcanizing with 2,5-dimethyl-2,5-di(t-butylperoxy) hexane (CAS Reg. No. 78-63-7), as a 68% dispersion on finely divided silica
Notifier:  Greene, Tweed and Company, Inc.
Manufacturer:  Greene, Tweed and Company, Inc.
Intended Use:  In the fabrication of vulcanized molded parts for food processing equipment, such as o-rings, gaskets, diaphrams and other materials, that function primarily in sealing applications
Effective Date:  03/30/2000
Limitations/Specifications:  The perfluorocarbon base polymer shall contain no less than 30 weight-percent (wt.-%) of polymer units derived from tetrafluoroethylene, no less than 60 wt.-% of polymer units derived from perfluoro(2,4-dimethyl-3,6-dioxanone vinyl ether), and no more than 4 wt.-% polymer units derived from perfluoro(6,6-dihydro-6-iodo-3-1-hexane). The uncured elastomer shall be composed of no more than 6 parts per hundred of triallylcyanurate and no more than 5 parts per hundred of 2,5-dimethyl-2,5-di(t-butylperoxy)hexane. The PCE must meet any applicable specifications prescribed in 21 CFR 177.2400 Perfluorocarbon cured elastomers.
Environmental Impact Decisions:  Environmental Decisions Site