B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 90/00 (2006.01) B01D 71/02 (2006.01) B65D 85/72 (2006.01) C02F 1/00 (2006.01)
Patent
CA 2396238
A universal elastomeric compound whose improved features display excellent permeability while simultaneously having above average chlorine compatibility. This improved elastomeric compound comprises a measured quantity of a terpolymer of ethylene-propylene-non-conjugated diene copolymer (i.e. EPDM, e.g. ROYALENE*3180), chlorinated Isobutylene (e.g. Chlorobutyl* 1066), furnace or carbon black (e.g., N-550*Black), paraffinic oil (e.g., Sunpar*150 oil), organofunctional magnesium silicate (e.g., Mistron* CB), magnesium oxide (e.g., Maglite* D Bar), zinc oxide, stearic acid, tetramethylthiuram disulfide (e. g., TUEX*, zinc thiophosphate (e. g., ROYALAC*136), and treated sulfur (e.g., Spider*Sulfur). Adding a specified quantity of said ROYALAC 136, TUEX, and Spider Sulfur to the EPDM/butyl compound imparts low taste and odor to water. Additionally, adding a specified quantity of said Mistron CB to ROYALENE 3180 and Chlorobutyl 1066, provides for an elastomeric compound having excellent resistance to chloramines. Because the herein prescribed combination of EPDM, butyl and other disclosed compositions exhibits low gas permeability, a high degree of chlorine compatibility, imparts low taste and odor to water, exhibits good flex characteristics, in addition to yielding extractants below the requirements of ANSI/NSF Standard 61 Health Effects Standard, the compound can be effectively used as an elastomeric barrier (e.g., a *Trademark diaphragm structure) in water storage and treatment systems, valves, pumps or the like.
Lane Joseph A.
Mitchel Julian
Amtrol Inc.
Macrae & Co.
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