Aluminum particles resistant to reaction with water

Claim 2

A process comprising treating aluminum particles in the form of a slurry in the presence of a water-miscible organic liquid, a minor quantity of water, and an inorganic reagent capable of protecting the aluminum particles against subsequent attack by water, steam, or corrosive aqueous solutions, said inorganic reagent being one selected from the group consisting of the compounds of chromium and vanadium and being present at a concentration of about 1% to about 33% by weight on the weight of aluminum particles treated.

Claim 3

The process of claim 1 in which the water-miscible organic liquid is miscible with at least 5% water by volume.

Claim 4

The process of claim 1 in which the minor quantity of water comprises a maximum of 40% of the total liquid volume.

Claim 5

The process of claim 1 in which the inorganic reagent is one or more compounds chosen from the group chromium trioxide, ammonium dichromte, ammonium vanadate, vanadium pentoxide and meta vanadic acid.

Claim 6

The process of claim 1 in which the aluminum particles are aluminum pigments.

Claim 7

The process of claim 1 in which the aluminum particles are atomized aluminum powder.

Claim 8

The process of claim 1 in which the aluminum particles are mechanically comminuted recovered waste aluminum, such as chopped foil, grinding scrap, lathe shavings or chopped scrap.

Claim 9

The process of claim 1 in which the aluminum particles are rapidly-chilled splat particles.

Claim 10

A pigment which comprises aluminum particles treated with an inorganic reagent selected from the group consisting of vanadium compounds and chromium compounds, said inorganic reagent protecting the surfaces of said particles against attack from a corrosive aqueous medium.

Claim 11

A pigment which comprises aluminum particles treated with an inorganic reagent selected from the group consisting of vanadium compounds and chromium compounds, said inorganic reagent protecting the surfaces of said particles against attack from a corrosive aqueous medium.

Claim 12

The pigment of claim 9 wherein the inorganic reagent is selected from the group consisting of V 2 O 5 , HVO 3 , NH 4 VO 3 , (NH 4 ) 2 Cr 2 O 7 and CrO 3 .

Claim 13

An aluminum particle-containing coating wherein the aluminum therein is treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds in an amount effective for retarding the reaction of the aluminum with water for inhibiting the generation of hydrogen gas.

Claim 14

An aluminum particle-containing coating wherein the aluminum therein is treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds in an amount effective for retarding the reaction of the aluminum with water for inhibiting the generation of hydrogen gas.

Claim 15

A composition of matter which comprises aluminum particles treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds in an effective concentration to retard the reaction of the aluminum with water, thereby inhibiting the evolution of hydrogen gas.

Claim 16

A composition of matter which comprises aluminum particles treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds in an effective concentration to retard the reaction of the aluminum with water, thereby inhibiting the evolution of hydrogen gas.

Claim 17

A pigment paste which comprises a major amount of aluminum flakes treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds, said pigment paste providing aluminum flake in a form capable of resisting attack from a corrosive aqueous medium.

Claim 18

A pigment paste which comprises a major amount of aluminum flakes treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds, said pigment paste providing aluminum flake in a form capable of resisting attack from a corrosive aqueous medium.

Claim 19

Aluminum particulates which are treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds whereby said aluminum particulates are protected from reaction with water which would otherwise result in the evolution of hydrogen gas.

Claim 20

Aluminum particulates which are treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds whereby said aluminum particulates are protected from reaction with water which would otherwise result in the evolution of hydrogen gas.

Claim 21

An aluminum pigment which contains aluminum flakes which are treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds in an amount effective to provide aluminum flakes capable of resisting attack from water.

Claim 22

An aluminum pigment which contains aluminum flakes which are treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds and chromium compounds in an amount effective to provide aluminum flakes capable of resisting attack from water.

Claim 23

A process comprising milling aluminum particles in the presence of a liquid hydrocarbon; a milling lubricant; water; a coupling agent which is an organic liquid miscible with water and with said liquid hydrocarbon and which comprises 3% to 30% by volume of the total liquids charged to the mill; and an inorganic reagent capable of protecting the newly-developed aluminum surfaces against subsequent attack by water, steam, or corrosive aqueous solutions, said inorganic reagent being one selected from the group consisting of compounds of chromium and vanadium and being present at a concentration of about 1% to about 12% by weight on the weight of aluminum particles charged to the mill.

Claim 24

A process comprising milling aluminum particles in the presence of a liquid hydrocarbon; a milling lubricant; water; a coupling agent which is an organic liquid miscible with water and with said liquid hydrocarbon and which comprises 3% to 30% by volume of the total liquids charged to the mill; and an inorganic reagent capable of protecting the newly-developed aluminum surfaces against subsequent attack by water, steam, or corrosive aqueous solutions, said inorganic reagent being one selected from the group consisting of compounds of chromium and vanadium and being present at a concentration of about 1% to about 12% by weight on the weight of aluminum particles charged to the mill.

Claim 25

A process as defined in claim 16 in which the coupling agent is diethylene glycol monoethyl ether acetate.

Claim 26

A process as defined in claim 16 in which the coupling agent is a surfactant, detergent or dispersing aid capable of solvating water in said liquid hydrocarbon.

Claim 27

A process as defined in claim 16 in which the said inorganic reagent is one or more compounds selected from the group consisting of chromium trioxide, ammonium dichromate, ammonium vanadate, vanadium pentoxide, and meta vanadic acid.

Claim 28

A process as defined in claim 19 in which the coupling agent is diethylene glycol monoethyl ether acetate.

Claim 29

A process as defined in claim 19 in which the coupling agent is a surfactant, detergent or dispersing aid capable of solvating water in said liquid hydrocarbon.

Claim 30

A pigment which comprises aluminum particles treated with an inorganic reagent selected from the group consisting of vanadium compounds, said inorganic reagent protecting the surfaces of said particles against attack from an aqueous medium.

Claim 31

A pigment which comprises aluminum particles treated with an inorganic reagent selected from the group consisting of vanadium compounds, said inorganic reagent protecting the surfaces of said particles against attack from an aqueous medium.

Claim 32

The pigment of claim 22 wherein the inorganic reagent is selected from the group consisting of V 2 O 5 , HVO 3 and NH 4 VO 3 .

Claim 33

An aluminum particle-containing coating wherein the aluminum therein is treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds in an amount effective for retarding the reaction of the aluminum with water for inhibiting the generation of hydrogen gas.

Claim 34

An aluminum particle-containing coating wherein the aluminum therein is treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds in an amount effective for retarding the reaction of the aluminum with water for inhibiting the generation of hydrogen gas.

Claim 35

A composition of matter which comprises aluminum particles treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds in an effective concentration to retard the reaction of the aluminum with water, thereby inhibiting the evolution of hydrogen gas.

Claim 36

A composition of matter which comprises aluminum particles treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds in an effective concentration to retard the reaction of the aluminum with water, thereby inhibiting the evolution of hydrogen gas.

Claim 37

Aluminum particulates which are treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds whereby said aluminum particulates are protected from reaction with water which would otherwise result in the evolution of hydrogen gas.

Claim 38

Aluminum particulates which are treated with an inorganic reagent which is a compound selected from the group consisting of vanadium compounds whereby said aluminum particulates are protected from reaction with water which would otherwise result in the evolution of hydrogen gas.