Organoclay compositions prepared from ester quats and composites based on the compositions
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United States of America Patent
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Sep 7, 2004
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N/A
app pub date -
Oct 21, 1999
filing date -
Oct 21, 1999
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Expired
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Abstract
Organoclays based on specific types of ester quats are found to be remarkably effective for use in preparing nanocomposites. These organoclays comprise the reaction product of a smectite clay and a quaternary ammonium compound (or 'quat') which comprises two esterified radicals hereinafter called a 'diester quat'). The diester quat may be present in admixture with further quaternary ammonium compounds having esterified radicals, especially compounds having three esterified radicals (hereinafter 'triester quats'); or compounds having a single esterified radical (hereinafter 'monoester quats'). Where such a mixture of quats is used, the reaction is between the smectite clay and the quat mixture. The diester quat should be present as greater than 55 wt % of the quaternary mixture; and any triester quat should be less than 25 wt %, with the fatty acids corresponding to the esters in the mixture having a degree of unsaturation such that the iodine value ('IV') is from about 20 to about 90.
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