OVERBASED METAL CARBOXYLATE CALCITE-CONTAINING GREASES
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United States of America Patent
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Issued Date -
Nov 6, 2008
app pub date -
May 1, 2007
filing date -
May 1, 2007
priority date (Note) -
Abandoned
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Abstract
Grease precursors of overbased alkaline earth metal carboxylates are prepared by reacting an alkaline earth metal base and a carboxylic acid in the presence of a hydrocarbon liquid, a polyol and an alcohol. The resulting grease precursor has amorphous calcium carbonate and a calcite content of greater than 10% by weight. At least one converting agent is added to the grease precursor containing elevated levels of calcite. This mixture is heated followed by the removal of water to form calcite-containing greases having a calcite content greater than 12.5% by weight.
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