Decorative objects with multi-color effects

• US 5,008,143 A
• Filed: 12/07/1989
• Issued: 04/16/1991
• Est. Priority Date: 07/06/1987
• Status: Expired due to Term

• Current Assignee: Engelhard Corporation (BASF SE)
• Original Assignee: Mearl Corporation (BASF SE)
• Inventors: Armanini, Louis
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Brown, Christopher
• Application Number:
  US07/453,385
• Time in Patent Office: 495 Days
• Field of Search: 428/204, 428/207, 428/329, 428/354, 428/407, 428/403, 427/201, 427/262, 350/163, 350/164, 350/165, 350/166, 523/135, 523/171, 106/413, 106/417, 106/418, 106/436
• US Class Current: 428/207
• CPC Class Codes: B05D 5/06 to obtain multicolour or other optical effects B05D5/02 takes precedence
• CPC Class Codes: B44F 1/08 characterised by colour effects
• CPC Class Codes: Y10T 428/24901 including coloring matter
• CPC Class Codes: Y10T 428/257 Iron oxide or aluminum oxide
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

An article exhibiting a multicolor effect is obtained by combining a transparent substrate, an interference pigment and an absorption colorant, the pigment and colorant preferably united in the form of a combination pigment, in which the absorption colorant is of a color which is different from the transmission color of the interference pigment or the complement thereof.

Claims

1. An article exhibiting a multicolor effect consisting essentially of a transparent body, an interference pigment and an absorption colorant in which said absorption colorant is of a color which is different from the reflection color of the interference pigment or the complement thereof and in which the interference pigment and absorption colorant have the same order of magnitude of color intensity.

2. An article according to claim 1 wherein the interference pigment and absorption colorant are united to form a combination pigment.

3. An article according to claim 1 wherein the interference pigment and absorption colorant are independently dispersed in said body.

4. An article according to claim 1 wherein the absorption colorant is selected from the group consisting of iron oxide, carmine, iron blue and chrome oxide.

5. The article of claim 4 wherein the interference pigment is titanium dioxide coated mica.

6. The article of claim 4 wherein the interference pigment is titanium dioxide coated mica and the amount of absorption colorant is between about 2 and 5% by weight based on the weight of the interference pigment.

7. The article of claim 1 wherein the interference pigment exhibits a gold color and the absorption colorant exhibits a purple color.

8. The article of claim 1 wherein the interference pigment exhibits a red color and the absorption colorant exhibits a yellow or green color.

9. The article of claim 1 wherein the interference pigment exhibits a blue color and the absorption colorant exhibits a red or green color.

10. The article of claim 1 wherein the interference pigment exhibits a green color and the absorption colorant exhibits a yellow or blue color.