Heat insulating material, engine comprising heat insulating material, nanoparticle dispersion liquid, and production method for heat insulating material
AssigneeMazda Motor Corporation
InventorsHiroyuki KOGA, Shinji KADOSHIMA, Kazuaki YAMAMOTO
Life of this patent
Estimating the term…
Abstract
A heat insulating layer contains many hollow particles, a silicone-based resin binder, and silica nanoparticle. The percentage of the silica nanoparticles in the total amount of the resin binder and the silica nanoparticles is equal to or greater than 10% by volume and equal to or smaller than 55% by volume.
Claims22
A heat insulating material containing many hollow particles, a silicone-based resin binder, and a nanoparticle, comprising:
- an inorganic nanoparticle as the nanoparticle,
- a percentage of the inorganic nanoparticle in a total amount of the resin binder and the inorganic nanoparticle being equal to or greater than 10% by volume and equal to or smaller than 55% by volume.
A nanoparticle dispersion liquid, a nanoparticle being dispersed in a reactive silicone-based resin solution,
- a percentage of the nanoparticle in a total amount of silicone-based resin and the nanoparticle upon reaction and curing of the resin solution being equal to or greater than 10% by volume and equal to or smaller than 55% by volume, and
- an HSP distance between the nanoparticle and the resin solution is equal to or smaller than 8.5 MPa0.5.
A nanoparticle dispersion liquid production method, comprising:
- a resin solution preparation step of preparing a reactive silicone-based resin solution;
- and
- a dispersion step of dispersing a nanoparticle by addition of the nanoparticle to the resin solution,
- an HSP value of the resin solution being, at the resin solution preparation step, adjusted by addition of a solvent such that an HSP distance between the nanoparticle and the resin solution is equal to or smaller than 8.5 MPa0.5,
- a percentage of the nanoparticle in a total amount of silicone-based resin and the nanoparticle upon reaction and curing of the resin solution being, at the dispersion step, being equal to or greater than 10% by volume and equal to or smaller than 55% by volume.
16-24. (canceled)
A method for producing a heat insulating layer containing many hollow particles, a silicone-based resin binder, and a nanoparticle, comprising:
- a resin solution preparation step of preparing a reactive silicone-based resin solution for the binder;
- and
- a step of preparing particle dispersion liquid by addition of the hollow particles and the nanoparticle to the resin solution;
- a step of forming a coating layer from the particle dispersion liquid applied to a base material;
- and
- a step of forming the heat insulating layer by burning of the coating layer,
- an HSP value of the resin solution being, at the resin solution preparation step, adjusted by addition of a solvent such that an HSP distance between the nanoparticle and the resin solution is equal to or smaller than 8.5 MPa0.5.
30-35. (canceled)
Dependencies are inferred from the claim text.