Hose construction containing fluoroelastomer composition and fluoroplastic barrier
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United States of America Patent
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Mar 20, 2007
Grant Date -
Dec 9, 2004
app pub date -
Jun 4, 2003
filing date -
Jun 4, 2003
priority date (Note) -
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Abstract
The present invention relates to a hose comprising: a thermoplastic fluoropolymer barrier layer; and a rubber layer adjacent to the barrier layer, the rubber layer comprising 100 parts by weight of an elastomer comprising FKM fluoroelastomer; from about 1 to about 15 parts by weight, per 100 parts by weight of elastomer, of at least one acid acceptor selected from the group consisting of magnesium oxide, calcium hydroxide, litharge, dibasic lead phosphite, calcium oxide, and zinc oxide; from about 1 to about 6 parts by weight, per 100 parts by weight of elastomer, of at least one diamine curative; and from about 1 to about 10 parts by weight, per 100 parts by weight of elastomer, of at least one of a hydrotalcite or tricalcium aluminate hexahydrate; wherein the weight ratio of the at least one acid acceptor to the at least one hydrotalcite ranges from about 1 to about 5.
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