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AssigneeNisshinbo Holdings Inc.
InventorsToshifumi Hashiba, Kazutoshi Hayakawa, Erina Matsuzaka
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The present invention provides amphiphilic polymer particles which are formed from a naturally derived starting material and exhibit hydrophobicity, while maintaining an adequate water absorption. An amphiphilic alginic acid particle group which is obtained by subjecting a polyvalent metal salt of alginic acid to a hydrophobization treatment with use of a hydrophobizing agent, wherein: some metal ions in the polyvalent metal salt of alginic acid are hydrophobized through a chemical bond with the hydrophobizing agent; the contact angle at 30 seconds after dropping a water droplet on the particle group is from 30° to 150°; and the water absorption per 100 g of the particles is not less than the oil absorption per 100 g of the particles.
Amphiphilic alginic acid particles obtained by subjecting a polyvalent metal salt of alginic acid to hydrophobizing treatment using a hydrophobizing agent,
A method for producing amphiphilic alginic acid particles, comprising the step of using a hydrophobizing agent to subject polyvalent metal salt of alginic acid-containing alginic acid particles to hydrophobizing treatment in a state where the hydrophobizing agent is not allowed to completely dissolve.
A method for producing amphiphilic alginic acid particles, comprising the steps of spray-drying a solution containing a monovalent salt of alginic acid and an incompletely dissolved hydrophobizing agent to obtain particles, and then subjecting the particles to crosslinking treatment and at the same time hydrophobizing treatment using a polyvalent metal salt.
A method for producing amphiphilic alginic acid particles, comprising the steps of forming a water droplet-in-oil emulsion which contains a monovalent salt of alginic acid and an incompletely dissolved hydrophobizing agent in the water droplets, and then carrying out crosslinking treatment using a polyvalent metal salt and at the same time carrying out hydrophobizing treatment with the hydrophobizing agent in an incompletely dissolved state.
Dependencies are inferred from the claim text.