Metal oxide coated aluminum pigments

Claim 2

A metallically bright reflection pigment consisting of a substrate of plateletlike aluminum and a coating of titanium dioxide.

Claim 3

A metallically bright reflection pigment consisting of a substrate of plateletlike aluminum, a coating of titanium dioxide and an oxide of titanium where the titanium is in an oxidation state < 4.

Claim 4

A metallically bright reflection pigment consisting of a substrate of plateletlike aluminum, a coating of titanium dioxide and an oxide of titanium where the titanium is in an oxidation state < 4.

Claim 5

A metallically bright reflection pigment consisting of a substrate of plateletlike aluminum and a coating of titanium dioxide and a member selected from the group consisting of titanium nitride or titanium oxynitride.

Claim 6

A metallically bright reflection pigment consisting of a substrate of plateletlike aluminum and a coating of titanium dioxide and a member selected from the group consisting of titanium nitride or titanium oxynitride.

Claim 7

A metallically bright reflection pigment consisting of a substrate of plateletlike aluminum, a coating of titanium dioxide and a coating of a different metal oxide.

Claim 8

A metallically bright reflection pigment consisting of a substrate of plateletlike aluminum, a coating of titanium dioxide and a coating of a different metal oxide.

Claim 9

A reflection pigment as defined in claim 4, wherein the metal oxide is iron oxide.

Claim 10

A process for preparing a metallically bright reflection pigment consisting essentially of plateletlike aluminum and a coating of titanium dioxide comprising passing TiCl 4 vapor at above 100° C. together with water vapor into a fluidized bed of plateletlike aluminum suspended with an inert carrier gas, with the proviso that the volume of the TiCl 4 vapor, based on the volume of the other gases and vapors introduced into the fluidized bed, does not exceed 5% by volume.

Claim 11

A process for preparing a metallically bright reflection pigment consisting essentially of plateletlike aluminum and a coating of titanium dioxide comprising passing TiCl 4 vapor at above 100° C. together with water vapor into a fluidized bed of plateletlike aluminum suspended with an inert carrier gas, with the proviso that the volume of the TiCl 4 vapor, based on the volume of the other gases and vapors introduced into the fluidized bed, does not exceed 5% by volume.

Claim 12

A process for preparing the reflection pigment defined in claim 6, which comprises passing TiCl 4 vapor at above 100° C. together with water vapor into a fluidized bed of plateletlike aluminum suspended with an inert carrier gas, with the proviso that the volume of the TiCl 4 vapor, based on the volume of the other gases and vapors introduced into the fluidized bed, does not exceed 5% by volume, and subsequently performing a treatment with a reducing gas at from 400° to 900° C.

Claim 13

A process for preparing the reflection pigment defined in claim 6, which comprises passing TiCl 4 vapor at above 100° C. together with water vapor into a fluidized bed of plateletlike aluminum suspended with an inert carrier gas, with the proviso that the volume of the TiCl 4 vapor, based on the volume of the other gases and vapors introduced into the fluidized bed, does not exceed 5% by volume, and subsequently performing a treatment with ammonia at from 400° to 900° C.

Claim 14

A process for preparing the reflection pigment defined in claim 6, which comprises passing TiCl 4 vapor at about 100° C. together with water vapor into a fluidized bed of plateletlike aluminum suspended with an inert carrier gas, with the proviso that the volume of the TiCl 4 vapor, based on the volume of the other gases and vapors introduced into the fluidized bed, does not exceed 5% by volume, and subsequently introducing vaporized iron pentacarbonyl into a fluidized bed of titanium oxide coated reflection pigment suspended with an inert carrier gas and oxidizing at above 150° C., with the proviso that the amount of iron pentacarbonyl introduced into the fluidized bed does not exceed 5% by volume, based on the total of gases introduced into the fluidized bed.