Gold colored metallic pigments that include manganese oxide nanoparticles layers

A nano-particle, manganese oxide technology, applied in the field of coating pigments, can solve the problems of separation of yellow pigments and aluminum flakes, loss of gold color, inconsistent color, etc.

Inactive Publication Date: 2011-08-31
SILBERLINE MFG CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite the simplicity of the described methods of producing golden metallic pigments, these methods have a major drawback: the yellow pigment separates from the aluminum flakes and this leads to color

Method used

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  • Gold colored metallic pigments that include manganese oxide nanoparticles layers
  • Gold colored metallic pigments that include manganese oxide nanoparticles layers
  • Gold colored metallic pigments that include manganese oxide nanoparticles layers

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0096] Step 1 Silicon passivation: To a 2L reaction flask equipped with a stirrer and condenser was added the following chemicals: 1.133g aluminum flakes (Sparkle Premium 695, 100 g aluminum metal equivalent), 600 g propylene glycol methyl ether; 2.30 g tetraethyl orthosilicate; 3.20 ml 28% ammonia solution; the mixture was continuously stirred at 85° C. for 6 hours. Once the reaction time had elapsed, the mixture was vacuum filtered and rinsed with propylene glycol methyl ether.

[0097] Step 2 Aminosilane Anchor Group Immobilization To a 2L reaction flask was added the following chemicals: 1.125g silicon passivated aluminum flakes (90g aluminum metal equivalent); 2.500g propylene glycol methyl ether; 3.20mL N-[3-(methoxy 4.20 mL of deionized water; the mixture was continuously stirred for 2 hours at 25° C. Once the reaction time was over, the mixture was filtered and rinsed with propylene glycol methyl ether.

[0098] Step 3 MnO 2 Nanoparticle Deposition To a 2 L reaction...

example 2

[0102] Step 1 Silicon passivation: To a 2L reaction flask equipped with a stirrer and condenser was added the following chemicals: 1.133g aluminum flakes (Sparkle Premium 695, 100 g aluminum metal equivalent), 600 g propylene glycol methyl ether; 2.30 g tetraethyl orthosilicate; 3.20 mL 28% ammonia solution; the mixture was continuously stirred at 85° C. for 6 hours. Once the reaction time had elapsed, the mixture was vacuum filtered and rinsed with propylene glycol methyl ether.

[0103]Step 2 Aminosilane anchoring group immobilization: Add the following chemicals to a 2L reaction flask: 1.125g silicon-passivated aluminum flakes (90g aluminum metal equivalent); 2.500g propylene glycol methyl ether; 3.20mL N-[3-(trimethoxy Trimthoxylsilyl)propyl]-ethylenediamine; 4.20 mL of deionized water; the mixture was continuously stirred at 25° C. for 2 hours. Once the reaction time was over, the mixture was filtered and rinsed with propylene glycol methyl ether.

example 4

[0106] To a 2L reaction flask equipped with a stirrer and condenser was added the following chemicals: 1. 96g golden metallic pigment (50g solid, 39g aluminum metal equivalent) prepared from Example 2; 2.250g propylene glycol methyl ether; 3.8g orthosilicate Ethyl ester; 4.4 mL of 28% aqueous ammonia solution; the mixture was continuously stirred at 85°C for 6 hours. Once the reaction time had elapsed, the mixture was vacuum filtered and rinsed with propylene glycol methyl ether. Example 5

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PUM

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Abstract

A gold color metallic pigment with coating of manganese oxide nanoparticles and a method to produce the gold color pigment are described. The disclosed coated pigment includes a platelet shaped substrate, a passivation layer applied to the substrate with surface anchoring groups and a manganese oxide nanoparticles layer. The coated pigment further includes an encapsulation layer or a surface property modification layer. The disclosed method provides pigments that exhibit brilliant gold color and a highly desirable appearance of real gold without the environmental issues causing by heavy metals.

Description

technical field [0001] The present invention relates generally to coated pigments, and in particular to the design of coated pigments for metallic and gold colors, and includes manganese oxide nanoparticles. Background technique [0002] Metallic pigments or metallic effect pigments are platelet-shaped metal particles with a thickness of less than 1 μm and a diameter of any value from a few μm to 100 μm. Metallic pigments are commonly used in the art to introduce metallic effects into a wide variety of products such as paints, coatings, inks, and plastic coatings as well as mass dyeing. One characteristic of metallic pigments is that due to their high aspect ratio, the pigments tend to orient parallel to the surface during application. Thus, the metallic effect is produced by the reflection of light on the surface of the pigment. The metallic pigments are prepared by grinding atomized metal powder or physical vapor deposition (PVD). Metals commonly used in the process inc...

Claims

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Application Information

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IPC IPC(8): C09C3/06C09D7/12C09D11/00B32B9/04C09D7/62
CPCC08K3/40C01P2004/64B82Y30/00C09D7/1225C08K9/04C01P2006/64C01P2006/62C01P2004/04C08K9/02C08K3/34C09C2200/1058C09D7/1291C01P2004/03C09C2200/407C09D17/004C09C2200/505C08K3/22C09D11/037C08K3/38C01P2002/85C09C1/0015C08K3/08C01P2006/63C09D7/62C09D7/70
Inventor 王巍林海晖P·J·M·里克比
Owner SILBERLINE MFG CO INC
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