Phosphoric acid metal compound-containing pearl pigment
AssigneeMerck Patent GmbH
InventorsAtuko Nishimagi, Masahiko Yazawai, Katuhisa Nitta
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Abstract
A pearl pigment which is excellent in discoloration resistance and in affinity (dispersibility) with resins, a production method for the same, and a resin composition, paint and ink into which the above pearl pigment is incorporated. The pearl pigment comprises a flake substrate, titanium oxide coated on the surface thereof, and a phosphoric acid metal compound, or a phosphoric acid metal compound and a metal oxide coated on the surface of particles coated with titanium oxide.
Claims21
A pearlescent pigment comprising a flaky substrate having thereon a titanium oxide and a phosphoric acid metal compound.
A method for producing a pearlescent pigment comprising a flaky substrate having thereon a titanium oxide and
- (a) at least one metal salt of a phosphoric acid,
- (b) at least one metal salt of phosphoric acid and an oxide of the same metal or metals,
- (c) phosphorus pentoxide and at least one oxide of Zn, Al, Zr, Mg, Bi, or
- (d) a mixture of at least two of (a), (b) or (c), said method comprising:
- coating titanium oxide hydrate on an aqueous suspension of a flaky substrate by hydrolysis of a titanium salt on the surface of the substrate, and simultaneously or successively with coating of the substrate
- forming a hydrolysis product of a salt of at least one Zn, Al, Zr, Mg or Bi metal and phosphoric acid or a phosphate compound with alkali on the substrate surface, and optionally
- filtrating and washing the coated substrate, followed by drying and calcining.
A method for producing a pearl pigment comprising a flaky substrate having thereon a titanium oxide and a Zn salt of phosphoric acid and optionally a zinc oxide, an Al salt of phosphoric acid and optionally an Al oxide, and a Si salt of phosphoric acid and optionally an Si oxide, said method comprising:
- coating titanium oxide hydrate on an aqueous suspension of a flaky substrate by hydrolysis of a titanium salt on the surface of the substrate,
- adding (1) phosphoric acid or a phosphoric acid salt compound and (2) a Zn salt to a coated particle surface and forming a hydrolysis product of the Zn salt and the phosphoric acid metal salt thereof with alkali, adding an Al salt and alkali to form a neutralized hydrolysis product thereof, further adding a silicate compound to form a hydrolysis product thereof, and optionally
- filtrating and washing the coated particles, followed by drying and calcining.
A pearlescent pigment comprising a flaky substrate having thereon a titanium oxide and a phosphoric acid metal compound, said pigment produced by a process comprising:
- coating titanium oxide hydrate on an aqueous suspension of a flaky substrate by hydrolysis of a titanium salt on the surface of the substrate, and simultaneously or successively with coating of the substrate
- forming a hydrolysis product of a salt of at least one Zn, Al, Zr, Mg or Bi metal and phosphoric acid or a phosphate compound with alkali on the substrate surface, and optionally
- filtrating and washing the coated substrate, followed by drying and calcining.
A pearlescent pigment comprising a flaky substrate having thereon a titanium oxide and a phosphoric acid metal compound, said pigment produced by a process comprising:
- coating titanium oxide hydrate on an aqueous suspension of a flaky substrate by hydrolysis of a titanium salt on the surface of the substrate,
- adding (1) phosphoric acid or a phosphoric acid salt compound and (2) a Zn salt to a coated particle surface and forming a hydrolysis product of the Zn salt and the phosphoric acid metal salt thereof with alkali, adding an Al salt and alkali to form a neutralized hydrolysis product thereof, further adding a silicate compound to form a hydrolysis product thereof, and optionally
- filtrating and washing the coated particles, followed by drying and calcining.
A resin composition, paint, or ink comprising a pearlescent pigment comprising a flaky substrate having thereon a titanium oxide and a phosphoric acid metal compound.
A resin composition, paint, or ink comprising a pearlescent pigment comprising a flaky substrate having thereon a titanium oxide and
- (a) at least one metal salt of a phosphoric acid,
- (b) at least one metal salt of phosphoric acid and an oxide of the same metal or metals,
- (c) phosphorus pentoxide and at least one oxide of Zn, Al, Zr, Mg, Bi, or
- (d) a mixture of at least two of (a), (b) or (c).
A resin composition, paint, or ink comprising a pearlescent pigment comprising a flaky substrate having thereon a titanium oxide and a Zn salt of phosphoric acid and optionally a zinc oxide, an Al salt of phosphoric acid and optionally an Al oxide, and a Si salt of phosphoric acid and optionally an Si oxide.
Dependencies are inferred from the claim text.