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US 11,685,799 B2Granted
Composite particles, method of producing composite particles, dry powder, and molding resin composition
AssigneeToppan Printing Co., Ltd.
InventorTakuya Isogai
Life of this patent
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Abstract
Composite particles comprising at least one type of polymer particles having surfaces that have thereon coatings formed of finely-disintegrated cellulose, with the polymer particles and the finely-disintegrated cellulose being inseparably bonded together.
Claims21
Composite particles, comprising:
- at least one type of polymer particles having surfaces that have thereon coatings formed of finely-disintegrated cellulose,
- wherein the at least one type of polymer particles and the finely-disintegrated cellulose are inseparably bonded together, wherein
- the coatings comprise a functional component other than cellulose;
- the functional component is metal microparticles;
- the metal microparticles and the finely-disintegrated cellulose are inseparably bonded together;
- and,
- the metal microparticles comprise (a) at least one metal selected from the group consisting of gold, silver, platinum and palladium or (b) a compound of the at least one metal.
4 more elements
A method of producing composite particles, comprising the steps of:
- a step 1A of defibrating raw cellulose materials in a solvent to obtain a dispersion liquid of finely-disintegrated cellulose;
- a step 2A of coating surfaces of polymerizable monomer droplets with the finely-disintegrated cellulose in the dispersion liquid to achieve stability as an emulsion;
- a step 3A of polymerizing the polymerizable monomer droplets to obtain composite particles in which polymer particles are coated with the finely-disintegrated cellulose;
- a step 4A of providing a functional component other than cellulose to the finely-disintegrated cellulose on the surfaces of the composite particles, wherein the step 4A comprises:
- a step of mixing the dispersion liquid with a solution comprising at least one type of metal ions to obtain a mixed solution;
- and
- a step of reducing the metal ions in the mixed solution to produce metal microparticles of at least one metal or a compound thereof, while compounding the metal microparticles with the finely-disintegrated cellulose on the surfaces of the composite particles.
4 more elements
A method of producing composite particles, comprising the steps of:
- a step 1A of defibrating raw cellulose materials in a solvent to obtain a dispersion liquid of finely-disintegrated cellulose;
- an auxiliary step 1A of compounding a functional component other than cellulose with the finely-disintegrated cellulose in the dispersion liquid;
- a step 2A of coating surfaces of polymerizable monomer droplets with the finely-disintegrated cellulose in the dispersion liquid to achieve stability as an emulsion;
- and,
- a step 3A of polymerizing the polymerizable monomer droplets to obtain composite particles in which polymer particles are coated with the finely-disintegrated cellulose wherein the auxiliary step 1A comprises:
- a step of mixing the dispersion liquid with a solution comprising at least one type of metal ions to obtain a mixed solution;
- and
- a step of reducing the metal ions in the mixed solution to produce metal microparticles of at least one metal or a compound thereof, while compounding the metal microparticles with the finely-disintegrated cellulose.
5 more elements
A method of producing composite particles, comprising the steps of:
- a step 1B of defibrating raw cellulose materials in a solvent to obtain a dispersion liquid of finely-disintegrated cellulose;
- a step 2B of coating surfaces of polymerizable monomer droplets with the finely-disintegrated cellulose in the dispersion liquid to achieve stability as an emulsion;
- a step 3B of controlling pH of the emulsion to 3.5 or less;
- and
- a step 4B of polymerizing the polymerizable monomer droplets in the emulsion to obtain composite particles in which polymer particles are coated with the finely-disintegrated cellulose.
2 more elements
A method of producing composite particles, comprising the steps of:
- a step 1B of defibrating raw cellulose materials in a solvent to obtain a dispersion liquid of finely-disintegrated cellulose;
- a step 2B of coating surfaces of polymerizable monomer droplets with the finely-disintegrated cellulose in the dispersion liquid to achieve stability as an emulsion;
- a step 3C of deoxygenating a system of the emulsion;
- and
- a step 4C of polymerizing the polymerizable monomer droplets in the emulsion, while maintaining a state of the system being deoxygenated, to obtain composite particles in which polymer particles are coated with the finely-disintegrated cellulose.
2 more elements
Dependencies are inferred from the claim text.