As the “protective coat” of the manufacturing industry, industrial coatings directly determine the lifespan, visual quality, and compliance of end-products. In the core formula of coatings, pigments not only serve to impart color but also influence key properties of the coating, such as weather resistance, temperature resistance, and chemical resistance, through their physical and chemical characteristics.
As the global manufacturing industry shifts towards higher-end and more environmentally friendly practices, organic pigments are gradually replacing some traditional inorganic pigments. This is due to their advantages, such as high color saturation, excellent environmental stability, and the absence of heavy metal contaminants. As a result, organic pigments have become a key material in the industrial coatings industry.
This article focuses on four of the most widely used organic pigments in industrial coatings: phthalocyanine blue, permanent violet, organic red, and organic yellow. It analyzes these pigments from three aspects: their key properties, applications, and advantages. Additionally, the target customer groups are identified, providing manufacturers and industry professionals with a comprehensive guide for selecting the right materials.
Phthalocyanine Blue
Core Performance
Phthalocyanine blue is the most widely used blue organic pigment in the industrial coatings industry. Its main component is a copper phthalocyanine complex. The PB15:3 (β-type phthalocyanine blue) is a representative example of this pigment. Its performance is particularly outstanding:
Its heat resistance can exceed 260°C, making it suitable for processes such as high-temperature curing of powder coatings and high-temperature baking of automotive paints.
It has a light and weather resistance rating of 8. After 5–8 years of exposure to outdoor conditions, there is no noticeable fading. It can withstand the effects of ultraviolet rays and acid rain.
It also boasts excellent resistance to solvents and acids/alkalis. It does not dissolve or cause discoloration in either water-based or solvent-based industrial coating systems. Its dispersibility is excellent, with a color variation ΔE≤0.5 between different batches, ensuring consistent coating colors.
Core uses
In industrial coatings, phthalocyanine blue is primarily used in three applications:
First, there’s the original car paint and repair paint. These are used for painting the car’s body in blue. Metal particles are added to create a deeper, more sophisticated texture. This ensures that the car’s paint meets the requirements for weather resistance and scratch resistance.
Secondly, there are industrial anti-corrosion coatings. These are suitable for coating outdoor structures such as construction machinery, bridges, and pipelines. They take into account both aesthetic considerations and the need for corrosion protection.
Third are roll-coated coatings and powder coatings, which are used for household appliance casings (such as refrigerator and air-conditioner panels) and various architectural products made of coated metal sheets. These coatings are resistant to high temperatures and maintain their color over time. Additionally, they can be used for coloring industrial inks and plastic coatings, making them suitable for a wide range of coloring applications.
Core Advantages
Compared to inorganic blue pigments, phthalocyanine blue has a 15%-20% higher coloring power. With the same color effect, less of this pigment is required, thereby reducing coating production costs. It contains no heavy metals, meeting environmental regulations such as EU REACH and US RoHS. It’s suitable for industrial coatings that come into contact with food. The crystal structure of phthalocyanine blue is stable, preventing color shifts over time. This ensures that the coating maintains its original color, reducing the need for color adjustments after application.
Eternal Purple Pigment
Core Performance
Eternal Purple belongs to the class of polycyclic heterocyclic organic pigments. With Pigment Violet 23 (Carbazole Violet) as its core component, it serves as a key ingredient in high-end purple-colored industrial coatings. Its main advantages include exceptional coloring power – it’s one of the strongest purple pigments among organic pigments. A small amount is sufficient to achieve a rich purple color. It can withstand temperatures up to 280°C, making it suitable for use in industrial coatings that require high-temperature curing. Additionally, it has excellent light and weather resistance, as well as solvent resistance. It doesn’t migrate in polyurethane or acrylic resin systems. Moreover, it’s resistant to acid and alkali corrosion, making it ideal for use in various industrial environments.
Primary purposes
In the field of industrial coatings, Permanent Violet is primarily used in high-end industrial coating applications.
First, there’s the automotive metal paint. When combined with phthalocyanine blue and organic red, it creates luxurious shades like violet and blue-violet. This enhances the overall quality of the car’s paint finish.
Secondly, there are special industrial coatings, which are suitable for coating aerospace equipment and the exteriors of high-end machinery. These coatings take into account both aesthetic considerations and the ability to withstand extreme environmental conditions.
Thirdly, there are coil coatings and anti-corrosion coatings, which are used for coloring architectural facades and metal surfaces of high-end household appliances in purple hues. These coatings meet both decorative and durability requirements.
Core Advantages
Eternal Purple has extremely high color saturation, allowing for the creation of a variety of highly recognizable hues. This makes it ideal for use in designing industrial products with distinct visual characteristics. Its molecular structure is stable, with no groups that are prone to oxidation. As a result, the paint does not clump or fade over time, ensuring its stability during storage. Additionally, it is compatible with various resin systems, reducing the risk of flocculation or color separation. This simplifies the process of formulating paints.
Organic Red Pigment
Core Performance
Common organic red dyes used in industrial coatings include DPP Red (Pigment Red 254) and Permanent Red (Pigment Red 170). These are high-performance pigments belonging to the azo or heterocyclic categories. Key properties of these dyes: DPP Red has a heat resistance of up to 300°C, as well as excellent light and weather resistance, making it suitable for use in high-temperature industrial coatings. Permanent Red boasts strong coloring power, pure color tone, and excellent solvent resistance. It does not cause discoloration when used in solvent-based coatings. Both dyes are free from heavy metal contaminants and exhibit good water and oil resistance. They are thus ideal for use in various industrial coating applications.
Core uses
Organic red is the preferred choice for red colors in industrial coatings. Its applications include:
First is automotive paint, which is used to paint red car bodies and decorative strips in red. Pearlescent powder is added to create a metallic texture.
Secondly, there’s construction machinery paint, which is suitable for painting equipment such as excavators and cranes in red. Its weather-resistant properties make it ideal for use in outdoor environments.
Third is household appliance coatings, which are used to give the exteriors of appliances like washing machines and rice cookers a red color. These coatings ensure both vibrant colors and excellent scratch resistance.
It can also be used for coloring industrial anti-corrosion coatings and powder coatings in red.
Core Advantages
Organic red pigments offer pure colors with a wide color range. It’s possible to create a variety of shades, from bright red to dark red, to meet the needs of different industrial product designs. These pigments also have excellent resistance to migration. During the curing process of the coating, no pigments leak out, ensuring that the finished product maintains a clean appearance. High-end models like DPP Red are resistant to high temperatures and aging, thereby extending the lifespan of industrial coatings and reducing maintenance costs over time.
Organic Yellow
Core Performance
In industrial coatings, organic yellows such as Isodioxolone Yellow (Pigment Yellow 139) and Permanence Yellow (Pigment Yellow 74) are commonly used. These pigments possess excellent weather and heat resistance. Isodioxolone Yellow has a light and weather resistance rating of 8, with a temperature resistance of up to 300°C. It can withstand ultraviolet rays and high temperatures. Permanence Yellow has excellent dispersibility in water-based coating systems. It’s easy to grind and disperse, has strong coloring power, and is resistant to acids, alkalis, and solvents. Therefore, it’s suitable for use in various industrial coating formulations.
Primary purposes
Organic yellows are widely used in industrial coatings:
First, there are architectural industrial coatings, which are used for painting the exterior walls of factories and office buildings in yellow. These coatings have excellent weather resistance, making them suitable for outdoor use.
Secondly, there’s the use of coatings for transportation facilities. These coatings are ideal for coloring road signs, guardrails, and other traffic-related elements. The colors are vibrant and remain stable over time, without fading.
Thirdly, there are household appliances and coil coatings. These are used for coloring the exteriors of household appliances and colored steel sheets used in construction materials. The yellow color chosen ensures both decorative appeal and durability.
It can also be used for coloring industrial anti-corrosion coatings and powder coatings to a yellow color, making it suitable for various painting applications.
Core Advantages
Organic yellow pigments are bright and vivid in color, making them easy to identify visually. This meets the color-coding requirements of industrial products. They also have excellent stain resistance. When used for outdoor applications, these pigments prevent dust and stains from adhering to the surface, making them easy to clean. High-end varieties like isoindolinone yellow boast outstanding weather resistance. They can be used in coastal areas and industrial zones where corrosion is severe, thereby extending the lifespan of the coatings.
Target customers
- Industrial coating manufacturers: This includes automobile coating manufacturers, anti-corrosion coating manufacturers, coil coating manufacturers, and powder coating manufacturers. These companies need to purchase high-performance organic pigments to formulate their coatings.
2. Coating contract manufacturers and coating service providers: These companies provide coating services for construction machinery, household appliances, and automotive parts. To ensure consistent color matching, they need reliable suppliers of pigments.
3. Manufacturers of high-end industrial products: Such as automobile manufacturers, aerospace equipment manufacturers, and building curtain wall companies. These companies purchase pigments directly for use in the development of their own coating systems, striving for optimal performance and compliance with environmental regulations.
From the perspective of the paint factory
For paint manufacturers, the choice of organic pigments directly determines the product’s market competitiveness and compliance with regulations.
Firstly, it is necessary to prioritize suppliers of organic pigments that hold international environmental certifications. This ensures that the products comply with regulations such as REACH, RoHS, and FDA, thereby avoiding compliance risks in international trade.
Secondly, it’s necessary to select the appropriate coatings based on their technological characteristics. For coatings that require high-temperature curing, phthalocyanine blue, DPP red, and isoindolinone yellow, which can withstand temperatures of 300°C or higher, are preferred. For outdoor-use anti-corrosion coatings, phthalocyanine blue and permanent violet, which have excellent light and weather resistance, are the best choices.
Finally, it’s important to pay attention to the dispersibility of the pigments and the stability of the products across different batches. Compatibility between the pigments and the resin system should be verified through pilot and laboratory tests, to avoid issues such as flocculation or color variation. Suppliers should also provide technical support for color formulation, thereby improving the efficiency of coating development.
Conclusion
Organic pigment coatings, phthalocyanine blue, permanent violet, organic red, and organic yellow are four major categories of organic pigments. Each of these pigments boasts unique properties that contribute to the core color system of industrial coatings. They not only endow industrial products with vibrant, long-lasting colors but also ensure the protective functions of industrial coatings due to their resistance to high temperatures, weathering, and environmental factors. These pigments are ideal for use in various industries, including automotive, construction, home appliances, and construction machinery. As industrial coatings continue to evolve towards being more environmentally friendly and high-quality, organic pigments will continue to play a crucial role as key ingredients in driving industry advancement.
For samples, technical specifications, or customized color matching solutions for industrial coatings using organic pigments such as phthalocyanine blue and permanent violet, please contact us for customized solutions.
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