Filled elastomer compositions
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United States of America Patent
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Jan 24, 1984
Issued Date -
N/A
app pub date -
Sep 2, 1982
filing date -
Oct 1, 1979
priority date (Note) -
Expired
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Abstract
A filled elastomer composition comprises a natural or synthetic rubber and, as a filler, a substantially dehydroxylated clay which contains at least 60% by weight of particles smaller than 2 microns equivalent spherical diameter, has a specific gravity not greater than 2.4 and a spherical surface area of at least 10 m.sup.2 g.sup.-1 and which has been treated with a substituted silane. The substantially dehydroxylated clay can be obtained by 'shock' calcining a kaolinitic clay.
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