METHOD FOR PRODUCTION OF RESIN PARTICLE
First Claim
1. A method for the production of resin particles, the method comprising the steps of melting and mixing a thermoplastic resin or elastomer having one or more acidic groups with filler particles and a water-soluble material to form a resin composition, the resin composition including a matrix and resin fine particles dispersed in the matrix, the resin fine particles formed from the thermoplastic resin or elastomer and the filler particles, and the matrix formed from the water-soluble material;
- and removing the matrix component from the resin composition to give the resin particles, wherein the amount of the acidic groups in the thermoplastic resin or elastomer before mixing and kneading step is 5 mmol/kg or more based on the total amount of the thermoplastic resin or elastomer, and the resulting resin particles each include the filler particles immobilized on the surface of the resin particle.
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Abstract
Disclosed is a method for producing resin particles, which can impart a desired function to the surface of resin particles efficiently and simply. Also disclosed are resin particles produced by the method.
The method produces resin particles by melting and mixing an acidic-group-containing thermoplastic resin or elastomer with filler particles and a water-soluble material to give a resin composition containing resin fine particles formed by the thermoplastic resin and the filler particles and dispersed in a matrix including the water-soluble material; and removing the matrix component from the resin composition, to give the resin particles. The resulting resin particles each include a core particle including the acidic-group-containing thermoplastic resin or elastomer, and the filler particles immobilized on the outside of the core particle. The acidic group is preferably carboxyl group or carboxylic anhydride group.
19 Citations
7 Claims
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1. A method for the production of resin particles, the method comprising the steps of melting and mixing a thermoplastic resin or elastomer having one or more acidic groups with filler particles and a water-soluble material to form a resin composition, the resin composition including a matrix and resin fine particles dispersed in the matrix, the resin fine particles formed from the thermoplastic resin or elastomer and the filler particles, and the matrix formed from the water-soluble material;
- and removing the matrix component from the resin composition to give the resin particles, wherein the amount of the acidic groups in the thermoplastic resin or elastomer before mixing and kneading step is 5 mmol/kg or more based on the total amount of the thermoplastic resin or elastomer, and the resulting resin particles each include the filler particles immobilized on the surface of the resin particle.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification