Sterically hindered phenol antioxidant granules having balanced hardness
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United States of America Patent
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Oct 5, 2004
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N/A
app pub date -
Mar 20, 2000
filing date -
Sep 22, 1998
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Abstract
Sterically hindered phenol antioxidant additive granules are formed from a paste comprising an organic processing agent comprising a friability reduction agent. The friability reduction agent preferably is an alcohol, more preferably an alkanol having up to about 8 carbon atoms, most preferably methanol, ethanol, and/or isopranol. After drying, the granules consist essentially of the sterically hindered phenol antioxidant additive system. The granules have a balanced hardness that provides sufficient abrasion resistance while permitting ready dispersion into a polymer host.
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