The development and production method of pigments

The development of pigment chips has been synchronised with the development of high-performance pigments. The superiority of performance, the persistence of application and the high added-value economy of all parts of the supply chain are the development direction of today's high-grade organic pigments. For example, Pigment Violet 23 (PV23), also known as carbazole violet, may be one of the most important high-performance pigments that can be used in almost any application in the world after phthalocyanine blue or phthalocyanine green pigments.

Pigment Violet 23 is a reddish color characterized by a very high coloring power, an unsurpassed bright color, and good light and heat resistance in almost all plastics. Among the orange and red luster regions, the most famous and popular high-performance pigments are quinacridine, perylene, solansenine, and diketopyrrolopyrrole pigments, which have excellent light resistance and weather resistance. , High thermal stability and satisfactory color shift resistance. An outstanding class of high-performance pigments are phthalocyanine blue and phthalocyanine green, which have excellent overall resistance properties as well as thermal stability and color migration stability. In the production of paints and inks, dispersion is a complex and costly process. Everyone hopes to achieve repeatable high color intensity and high quality while simplifying steps. In the field of using inorganic pigments, pigment color chips solve the problems of unstable performance, poor color density, and time-consuming grinding.

The easy dispersion of pigments is the most desirable feature for consumers, such as the appearance of milk powder and instant coffee, and pigments that can be easily dispersed in the media as long as they are stirred are ideal for users. It is no exaggeration to say that due to the appearance of pigments and the industrialization of surface treatment, together with the development of new dispersants and the advancement of dispersers, the dispersion of pigments has become easier than in previous years. In itself, the dust pollution caused by scattering of powder pigments is not a good thing in view of the operating environment. Therefore, non-dispersive and non-dispersive properties are achieved by means of pigmentation, granulation, sheeting, and addition of anti-scattering agents. The easy-to-measure pigments have become popular, and this is the soil where pigment pigments survive and develop. In the future, with the diversification of user needs, it is increasingly necessary to cater to the market with multi-species and low-volume production.

Since multi-species and low-volume production will definitely increase the cost of products, pigment pigment products will be produced in a concentrated way by specific pigment chip manufacturers, and the methods provided by ink manufacturers to consumers through their own brands and sales channels will increase. This is the trend of the times. At present, the main common methods are mixing and squeezing. The former mainly consists of mixing pigments with cellulose, plasticizers, stabilizers, and resins, and then melt-kneading them on a heated kneader until they are uniform, and then pulling them into sheets. After cooling, they are crushed into pre-pregs by a pulverizer. Disperse pigment chips. Water-squeezing method is produced by mixing and pressing the pigment cake, cellulose, plasticizer, stabilizer and resin until it is even, and then dehydrating it to form a sheet and crushing it into a pigment color. sheet.