Granted Patent B2

US 8,192,540 · App. 12/512,578 · Granted Jun 5, 2012

Abstract

Claims (10)

1. A method for producing a color powder, the method comprising:

dry mixing a base powder, a pigment powder and a bonding agent;

during the dry mixing, applying heat so as to bring the bonding agent to an adhesive state while the base powder and the pigment powder remain in a stable state, thereby forming agglomerates each comprising a component of the base powder and a component of the pigment powder, bonded together using a component of the bonding agent; and

dry mixing the agglomerates with an additional amount of the base powder, to produce a color powder adapted to be applied in a color coating process.

2. The method according to claim 1 , wherein the base powder comprises a neutrally-colored base powder.

3. The method according to claim 1 , wherein the base powder comprises at least one additive selected from a group consisting of: a matting agent, a flowing agent and a sand-effect agent.

4. The method according to claim 1 , wherein the dry mixing comprises dry mixing in a cutting mixer.

5. The method according to claim 4 , further comprising controlling a size of the agglomerates by adjusting a mixing parameter.

6. The method according to claim 1 , wherein the heat at which the bonding agent is in the adhesive state and the base powder and the pigment powder are in the stable state is a temperature between 40 and 100 degrees Celsius.

7. The method according to claim 6 , wherein the heat at which the bonding agent is in the adhesive state and the base powder and the pigment powder are in the stable state is a temperature between 50 and 70 degrees Celsius.

Assignments (11)