Inorganic nanoparticle-coated hollow particles, method for producing the same, and aqueous dispersion containing the hollow particles
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United States of America Patent
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Jul 25, 2023
Grant Date -
Nov 18, 2021
app pub date -
Sep 11, 2019
filing date -
Sep 28, 2018
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Abstract
Provided are hollow particles which are more excellent in heat resistance and dispersibility than ever before and which are lightweight. The hollow particles containing hollow resin particles having a surface covered with inorganic fine particles, wherein a volume average particle diameter of the hollow particles is from 0.1 μm to 9.0 μm, and a void ratio thereof is from 55% to 95%; wherein a repeating unit constituting the resin of the hollow resin particles contains a crosslinkable monomer unit, and a content of the crosslinkable monomer unit is from 25 to 100 parts by mass, with respect to 100 parts by mass of the resin; wherein a primary particle diameter of the inorganic fine particles is from 10 nm to 120 nm; and wherein the inorganic fine particles are contained at from 5 to 180 parts by mass, with respect to 100 parts by mass of the hollow resin particles.
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