NBR COMPOSITION
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United States of America Patent
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Issued Date -
Jun 25, 2015
app pub date -
Jul 25, 2013
filing date -
Aug 9, 2012
priority date (Note) -
Abandoned
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Abstract
An object is to provide an NBR composition excellent in cold resistance and heat resistance, which can be used with a wide range of temperatures, and an NBR composition excellent in oil resistance without substantially degrading compression set characteristics, and the object can be solved by an NBR composition comprising an NBR polymer, silica, an ether ester series plasticizer and a cross-linking agent, which comprises 100 parts by weight of the NBR polymer where an acrylonitrile content of the NBR polymer is within the range of 20 to 40%, 10 to 150 parts by weight of silica a primary particle size of which is within the range of 50 nm or bigger, and 3 to 20 parts by weight of an ether ester plasticizer a weight average molecular weight MW of which is 500 or more.
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