ETHYLENE-PROPYLENE-DIENE RUBBER FOAMED MATERIAL AND SEALING MATERIAL
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United States of America Patent
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Issued Date -
Aug 7, 2014
app pub date -
Sep 18, 2012
filing date -
Sep 21, 2011
priority date (Note) -
Abandoned
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Abstract
An ethylene-propylene-diene rubber foamed material is obtained by foaming a rubber composition containing an ethylene-propylene-diene rubber. The ethylene-propylene-diene rubber foamed material has a permanent compression set obtained by being compressed by 50% at 80° C. for 22 hours to be then released at 23° C. after the elapse of 24 hours of 30% or less. The content ratio of a sulfur atom calculated based on the measurement result of a fluorescent X-ray measurement, based on mass, is 1000 ppm or less.
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