Organic inorganic composite powder, method of producing the same, and composition containing the powder
AssigneePola Chemical Industries Inc.
InventorsYutaka Takasuga, Eiji Takahashi
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Abstract
The present invention provides an organic inorganic composite powder which has a specific particle shape in accordance with a washing solvent, which contains fine inorganic particles, and which easily disperses in water by: precipitating a metal salt from the reaction solvent through neutralization or reduction in the presence of a polymer or monomer dissolved in the reaction solvent; polymerizing the monomer after precipitation of the metal salt in the case where the monomer forms no composite with the metal salt during precipitation in the presence of the monomer; washing the obtained precipitate with a specific washing solvent; and drying the resultant.
Claims10
A method of producing an inorganic powder composite comprising:
- dissolving a metal salt and one or more compounds selected from the group consisting of a lower carboxylic acid, a polymer of the lower carboxylic acid, a carboxylic acid derivative, and a polymer of the carboxylic acid derivative in a water-miscible organic solvent or a liquid mixture of water and a water-miscible organic solvent;
- and
- neutralizing the metal salt or reducing a metal of the metal salt;
- wherein the lower carboxylic acid is represented by the following general formula (1) wherein X represents hydrogen;
- and
- wherein the carboxylic acid derivative is represented by the following general formula (1) wherein X represents an alkali metal, or polyoxyethylene having 23 or less carbon atoms;
- wherein R represents a hydrogen atom, or an alkyl group or alkenyl group which may have one or both of a carboxyl group and a hydroxyl group;
- and X represents hydrogen, an alkali metal, or polyoxyethylene having 23 or less carbon atoms.
A method of producing a fine particle metal oxide or hydroxide/polymer composite, comprising the steps of:
- reacting a metal salt and an alkali in the presence of a water-soluble polymer, or reacting a metal salt and an alkali in the presence of a water-soluble monomer and then polymerizing the water-soluble monomer, to form a composite of a metal oxide or hydroxide and the water-soluble polymer;
- washing products excluding the composite with a water-containing alcohol;
- and
- drying the washed products.
Dependencies are inferred from the claim text.