Appeal No. 94-2973
Application No. 07/956,529
1. A method of preparing a stable aqueous slurry of
magnesium hydroxide comprising:
(a) forming an aqueous mixture of
(i) from about 30 to about 70 percent by weight
magnesium hydroxide;
(ii) from about 0.2 to about 20 percent by weight based
on the weight of magnesium hydroxide of one or more polymeric
anionic dispersants and salts thereof; and
(iii) from about 0.2 to about 20 percent by weight based
on the weight of magnesium hydroxide of one or more water-soluble
alkali metal salts selected from the group consisting of alkali
metal hydroxides, alkali metal halides, alkali metal carbonates,
alkali metal sulfates, alkali metal nitrates, alkali metal
silicates and alkali metal salts of C -C polycarboxylic acids;
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and
(b) agitating the mixture to suspend the magnesium
hydroxide.
22. A method of preparing a stable aqueous slurry of
magnesium hydroxide comprising:
(a) forming an aqueous mixture of
(i) from about 30 to about 70 percent by weight
magnesium hydroxide;
(ii) from about 0.2 to about 20 percent by weight based
on the weight of magnesium hydroxide of one or more polymeric
anionic dispersants and salts thereof wherein the dispersant is
selected from the group consisting of polymers formed from one or
more monomers selected from the group consisting of acrylic acid,
methacrylic acid, crotonic acid, maleic acid, maleic anhydride,
itaconic acid, mesaconic acid, fumaric acid, citraconic acid,
vinylacetic acid, acryloxypropionic acid, vinylsulfonic acid,
styrenesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid,
allylsulfonic acid, allylphosphonic acid, vinylphosphonic acid,
vinylsulfonic acid and salts thereof; and from 0 to about 50
percent by weight of one or more monomers selected from the group
consisting of methylacrylate, ethylacrylate, butyl acrylate,
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