Process for dispersing finely divided particles in an aqueous medium
AssigneeSolvay & Cie
InventorLucien Plumet
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Abstract
A process is provided for dispersing finely divided water-insoluble particles in an aqueous medium. The dispersing agent used comprises a salt of a polymer derived from an alpha-hydroxyacrylic acid, which salt contains units of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently represent hydrogen or an alkyl group containing 1 to 3 carbon atoms and wherein M represents a cationic radical resulting from the dissociation of a base.
Claims30
In a painting composition obtained by dispersing finely divided water-insoluble particles in an aqueous medium by using as dispersing agent a salt of a carboxylated polymer, the improvement wherein the dispersing agent used comprises a salt of a polymer derived from an alpha-hydroxyacrylic acid, which salt contains at least 50 mol % of units of the formula ##STR4## wherein R.sub.1 and R.sub.2 independently represent hydrogen or an alkyl group containing 1 to 3 carbon atoms and wherein M represents a cationic radical resulting from the dissociation of a base.
In a composition for the coating of paper obtained by dispersing finely divided water-insoluble particles in an aqueous medium by using as dispersing agent a salt of a carboxylated polymer, the improvement wherein the dispersing agent used comprises a salt of a polymer derived from an alpha-hydroxyacrylic acid, which salt contains at least 50 mol % of units of the formula ##STR7## wherein R.sub.1 and R.sub.2 independently represent hydrogen or an alkyl group containing 1 to 3 carbon atoms and wherein M represents a cationic radical resulting from the dissociation of a base.
In an adhesive composition obtained by dispersing finely divided water-insoluble particles in an aqueous medium by using as dispersing agent a salt of a carboxylated polymer, the improvement wherein the dispersing agent used comprises a salt of a polymer derived from an alpha-hydroxyacrylic acid, which salt contains at least 50 mol% of units of the formula ##STR10## wherein R.sub.1 and R.sub.2 independently represent hydrogen or an alkyl group containing 1 to 3 carbon atoms and wherein M represents a cationic radical resulting from the dissociation of a base.
Dependencies are inferred from the claim text.