Pigment Green 26 Cobalt Chromite Green Spinel For Coating

 

 

 

 

 

FU-C411, Pigment Green 26 (C.I. Pigment Green 26), also known as malachite green, Cobalt green , is an inorganic green pigment, with its unique yellow light green and excellent durability in the industrial field is widely used.

 

 

 

I. Physical and chemical properties of pigment green 26

1. Chemical composition and structure

The chemical formula of pigment green 26 is CoO·Cr₂O₃, which is composed of cobalt oxide (CoO) and chromium oxide (Cr₂O₃) calcined at high temperature according to a specific molar ratio to form a stable composite oxide structure.

2. Performance characteristics

Heat resistance: can withstand the high temperature of more than 1000℃, suitable for high temperature environment coloring needs.

Light resistance: Light resistance of up to 8 (the highest is 8), not easy to fade under long-term sunlight.

Chemical stability: acid and alkali resistant, and with high infrared reflectivity, suitable for special functional coatings.

Color performance: Presents a vivid yellow-light green, unique tone, compared with other green pigments more bright.

3. Physical parameters

Relative density: 4.71 ~ 5.52 g/cm³

Oil absorption: 11 ~ 20g /100g

pH value: 6 ~ 9 (neutral to weakly alkaline).

 

 

 

 

Second, the application field of pigment green 26

1. High temperature resistant paint

Used in fluorocarbon coatings, coil steel coatings, powder coatings, etc., especially in the need for long-term anti-aging and anti-powder outdoor building coatings, such as Bridges, steel structures, etc.

2. Plastic and rubber products

It is suitable for outdoor plastic products (such as plastic steel door and window profiles) and engineering plastics (such as auto parts, toys), and its weather resistance can resist ultraviolet rays and extreme climates.

- Added to the masterbatch to improve the color stability and durability of plastic products.

3. Ceramic and enamel industry

As a colorant for high temperature sintering, it is used in ceramic glazes, glass products and enamel surfaces to ensure that the color remains bright after high temperature firing.

4. Special function coatings

Camouflage coating: Using its infrared reflection properties, it is used in the design of stealth coating for military equipment.

Road sign coatings: Provide high visibility and weather resistance in traffic signs for extended service life.

5. Fine Arts and industrial pigments

As a high-grade fine art pigment, it is suitable for painting and decoration fields, especially in the creation of artworks requiring long-term color retention.

 

 

Third, application advantages and market positioning

Environmental protection and safety: Compared with heavy metal pigments containing lead or chromium (such as lead chromium green), cobalt green contains cobalt, but it is less toxic and meets the safety standards of industrial pigments.

High-end market positioning: Due to its high cost and excellent performance, it is mainly used in high-end weather resistant products, such as luxury automotive coatings and outdoor building curtain walls.

Replacement of traditional pigments: In the scene requiring ultra-durability, gradually replace the poor heat resistance of lead chromium green and iron oxide green.

4. Production and synthesis methods

Pigment Green 26 is prepared by the following steps:

1. Raw material mixing: cobalt oxide and chromium oxide are mixed and crushed according to stoichiometric ratio.

2. High temperature calcination: calcined at 1000 ~ 1300℃ to form a stable compound oxide.

3. Post-treatment: After cooling, grind to the required particle size to ensure pigment dispersion and coloring strength.

Pigment Green 26 is an important choice for high-end industrial coloring due to its unique yellow-green color, ultra-high heat resistance and chemical stability. From architectural coatings to military camouflage, from outdoor plastics to artistic creation, its application scenarios are wide and professional, and it is a representative of high-performance pigments that are both functional and beautiful.

 

Particle Size(um)≤: 1.5

PH Value: 6~9

Oil Obsorb g/100g: 10~25

Moisture %: ≤0.3

Sieve Residue(400 mesh): ≤0.05

Electrical Conductivity (us/cm): ≤200

Chemical Resistance

Heat Resistance (℃) ： 1200

Weather Resistance (1-5)： 5

Light Fastness (1-8)： 7-8

Acid and Alkali Resistance (1-5)： 5

 

 

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