Inorganic oxide microparticle dispersion
AssigneeNagase Chemtex Corporation
InventorYuki Sugiura
Life of this patent
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Abstract
The present invention aims to provide a method of producing a fine particulate inorganic oxide dispersion, which makes it possible to easily disperse a fine particulate inorganic oxide while reducing the amount of dispersant used. The present invention relates to a method of producing a fine particulate inorganic oxide dispersion, the method including mixing the following components (A) to (D): (A) at least one fine particulate inorganic oxide selected from the group consisting of zirconium oxide (ZrO2), titanium oxide (TiO2), and barium titanate (BaTiO3), (B) a dispersant, (C) an alkoxysilane compound, and (D) a solvent having the following Hansen solubility parameters: a hydrogen bonding component (dH) of 11 or less and a polar component (dP) of 4 or more; and wet grinding the resulting mixture.
Claims6
A resin composition, comprising:
- a fine particulate inorganic oxide dispersion, comprising the following components (A) to (D):
- (A) at least one fine particulate inorganic oxide selected from the group consisting of zirconium oxide (ZrO2), titanium oxide (TiO2), and barium titanate (BaTiO3),
- (B) at least one dispersant selected from phosphoric acid dispersants,
- (C) an alkoxysilane compound,
- (D) a solvent having the following Hansen solubility parameters:
- a hydrogen bonding component (dH) of 11 or less and a polar component (dP) of 4 or more;
- and
- a binder resin,
- wherein an amount of the at least one dispersant (B) is 0.25 to 8 parts by weight relative to 100 parts by weight of the at least one fine particulate inorganic oxide (A),
- a ratio by weight of the at least one dispersant (B) to the alkoxysilane compound (C) is 20:80 to 5:95, and
- wherein a sum of the at least one dispersant (B) and the alkoxysilane compound (C) is 5 to 40 parts by weight relative to 100 parts by weight of the at least one fine particulate inorganic oxide (A),
- wherein the resin composition is obtained by:
- (i) wet grinding the mixture of the components (A) to (D) to obtain the fine particulate inorganic oxide dispersion, and
- (ii) adding the binder resin to the fine particulate inorganic oxide dispersion.
A method of producing a fine particulate inorganic oxide dispersion, the method comprising:
- mixing the following components (A) to (D):
- (A) at least one fine particulate inorganic oxide selected from the group consisting of zirconium oxide (ZrO2), titanium oxide (TiO2), and barium titanate (BaTiO3),
- (B) at least one dispersant selected from phosphoric acid dispersants,
- (C) an alkoxysilane compound, and
- (D) a solvent having the following Hansen solubility parameters:
- a hydrogen bonding component (dH) of 11 or less and a polar component (dP) of 4 or more;
- and
- wet grinding the resulting mixture,
- wherein a sum of the at least one dispersant (B) and the alkoxysilane compound (C) is 5 to 40 parts by weight relative to 100 parts by weight of the at least one fine particulate inorganic oxide (A),
- the at least one fine particulate inorganic oxide (A), the at least one dispersant (B), and the alkoxysilane compound (C) are added all at once to the solvent (D),
- an amount of the at least one dispersant (B) is 0.25 to 8 parts by weight relative to 100 parts by weight of the at least one fine particulate inorganic oxide (A), and
- a ratio by weight of the at least one dispersant (B) to the alkoxysilane compound (C) is 20:80 to 5:95.
Dependencies are inferred from the claim text.