The development direction of organic pigment industry technology

the development of organic pigment industry technology and other industrial technology, its application field continues to expand, put forward higher requirements, to promote the relevant technology to a deeper directionThe requirements for its organic pigment products can be summarized as follows: (1) the high-grade products, that is, to meet the durability of metal surface coating, climate fastness, heat resistance, solvent resistance, and migration resistance requirements;application department's requirements promote the rapid development of organic pigment industry technology, from classic organic unit synthesis reactions (e.ghalogenation, nitrification, reduction, condensation, heavy nitride, conjugate reaction), filtration, separation, drying, crushing processes gradually penetrate multidisciplinary fields, such as solid physical chemistry, morphology, powder surface chemistry, interface chemistry, solid stoic and crystal chemical, polymer chemistry and powder dispersion technologyOne of the outstanding research hot spots is the development of new structural pigment varieties, the implementation of surface modification technology of colored crystal particles, effective pigment dispersion technology, organic pigment commercialization processing technology and application performance detection and evaluation(1) the development of new chemical structure pigment varieties
is to improve the durability of pigments, heat stability, climate fastness, solvent stability and migration resistance; The main way is to synthesize a new type of heterocyclic structure pigment, which has good molecular planeSymmetry, containing a specific replacement base, changes molecular polarity, can form hydrogen bonds between molecules, improve heat stability and migration resistanceHigh-grade (high-performance) organic pigmentS HOP or HGP (HighPerformance OrganicS) are classified according to the durability of pigments (light, climate fastening, thermal stability, solvent resistance, migration resistance, etc.) HighGrade Pignents), not only has excellent application fastness performance, but also product added value, highThere is no doubt that the increasing number of high-grade organic pigment products, to meet the application of special dosage forms, high-performance requirements, will be an important trend in the future developmentdata show that high-grade organic pigments (including ketones, ketamine, ketones, isothazole pigments, DPP red and other varieties and special structures of azo), although its output is only 18,000 t (8%), but its output value is higher than 75,000 t (33%) of the argon, and the output value of 120,000 t of the ordinary azo pigment (57%) about 35%(2) The new technology of organic pigment-specific intermediate synthesisbased on the special requirements for the structure and quality of intermediate raw materials required for the synthesis of organic pigments, the new synthesis process of different intermediates is studied, such as opening up new basic raw materials, changing the synthesis process route, reducing the generation of isomers or studying specific separation, pure chemistry, and developing non-carcinogenic intermediates to replace certain banned aramine intermediatesNew processes of general concern include: catalytic hydrogenation reduction process to prepare aramine derivatives, alkylated phase transfer catalytic reaction technology under pressure, etc., in order to reduce three waste emissions, help environmental protection, reduce costs, and improve the intrinsic quality of final pigment products(3) dispersion process, powder technology expansion-related additives researchto ensure that pigment particles in the paint, plastic, ink and paint printing slurry effective dispersion, in order to obtain a fine particle size, concentrated distribution, and has a good wetting, the addition of surfactants and dispersion equipment has a close relationshipWe should devote ourselves to the research on the development and application of new, efficient, multi-functional wetting and dispersing additives (4) the modified deep processing and commercialization technology of organic pigments because in the process of use, the organic pigment particles are evenly dispersed in the oily, water-based application medium, in order to make it well wet, dispersed, the synthetic pigment particles must be modified surface, in order to give pigment particles a higher pro-oil or hydrophilic performance, to achieve a good match with the use of the medium Pigment makers try to modify the surface by or by modifying the resulting paste-like, powdery particles during the synthesis process Develop a variety of organic pigment modification processing techniques, such as pine soap treatment, surfactant and new polymeric surfactant (ultradispersive agent) treatment, pigment itself derivative modification process, grinding treatment, organic solvent treatment, acid solution or acid expansion process, squeeze water-to-phase chelation process, organic amine modification process, chromatonic coating technology, microcapsule coating technology and the implementation of modification with inorganic compounds Through a variety of specific surface modification deep processing, the final preparation of the application performance in line with the requirements of the use of pigment commodity dosage forms (5) evaluation of the performance of organic pigment applications
in order to ensure the intrinsic quality of the product, according to user needs to develop new structures and new dosage forms of products, improve product grade, increase competitive strength, each production plant through physical chemistry (instrument) analysis methods to implement raw materials, process and pigment product analysis, monitoring and testing Pigment product quality includes evaluation of the pigment's own performance (e.g moisture, relative density, ash, water solution, PValue, oil absorption, crystal pattern and particle size, etc.) and coloring performance (e.g coloring, phase, masking, transparency, light resistance, heat resistance, migration resistance, dispersion and dispersion stability)