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Summary of the most complete knowledge of pigments

Time:2017/11/5 9:22:14 Number of visitors:
abstract:Note: Pigments can be divided into organic pigments and inorganic pigments according to their chemic...

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Note: Pigments can be divided into organic pigments and inorganic pigments according to their chemical molecular structure. Organic pigments and inorganic pigments have their own color classification.

I. Organic Pigment Yellow

1. Azo yellow

PY 1 Hansa yellow is non-toxic with monoazo structure yellow. The dyeing power of Hansa yellow series is about half of that of diazo structure yellow. It has better light and weather resistance in dark color. Cheap Prices determine its widespread use in coatings. However, the pigments are slightly soluble in organic solvents, leading to the appearance of percolation and recrystallization when applied. The migration resistance is not good, but the single azo PY97 is exceptional. It is not recommended to use in outdoor light-colored system and in situations requiring good migration resistance. Typical product: Kaibai Heuco 100100. PY 12, PY 14, PY 17 and PY 83 are commonly known as "azo" yellow in China. It uses very common pigments with high dyeing power, high saturation, general light resistance, solvent resistance and migration resistance. And cheap prices. At present, powder coatings, wood coatings, low-grade indoor industrial coatings, toy paint and other widely used. But this kind of pigments will decompose when the temperature exceeds 200 degrees. It is not suitable for powder coatings whose baking temperature exceeds 200 degrees. Among them, P.Y.83 has the best light resistance and can also be used in dark outdoor powder.

PY 1 sunproof yellow G Hansha yellow G monoazo medium yellow 6 - 7 sunproof 160 coloring power is strong, bright, inexpensive, can be used for dark green, not suitable for orange/brown and other colors will frost, solvent resistance is poor, migration resistance is poor.

PY 12 benzidine yellow G, diazo, medium yellow, sun-resistant grade 5, heat-resistant 180, bright color, strong dyeing power and relatively cheap. The fastness is not ideal.

PY 14 Yongguhuang G/5GF, diazo, green yellow, sun-resistant grade 5, heat-resistant 180.

PY 17 Yonggu yellow GG, diazo, green light yellow light-resistant grade 5 heat-resistant 180-200, green than PY14, more green than PY12, light fastness than PY14 is 1-2 grades higher, but the shading power is worse than PY14.

PY 83 immortal yellow HR diazo, red light yellow sunlight resistant 7 - 8 heat resistant 180 - 200 color, strong dyeing power and relatively cheap price, widely used red light yellow varieties.

2. isoindolinone yellow

PY 110 isoindolinone yellow isoindolinone red light yellow 8 > 200 is one of the best red light yellow organic pigments. Red light yellow pigments with strong red light have good fastness and are considered to be the best of all red light yellow organic pigments. PY 139 isoindolin yellow isoindolin red light yellow 8 > 200 is very good. Sun fastness and climate fastness, multi-use American patent: US2005/0228078A1 treatment.

Foreign brand: BASF PALIOTOL YELLOW K1841 Refining CROMOPHTAL YELLOW 2RF. Klein NOVEPERM M2R 70 GRAPHER H2R

Application Range: High temperature, high climate paint, ink, plastic and synthetic fiber coloring, especially for polyolefin plastic coloring, can also be used for polypropylene fiber raw liquor coloring.

Characteristic: Excellent heat resistance and weatherability, medium dyeing power, heat resistance of HDPE with 1/3 standard depth of 250 C/5 min, and heat resistance of sample with 1/25 standard depth of 260 C/5 min. It can be used for polyvinyl chloride colouring. In soft polyvinyl chloride, yellow 3139 has good migration resistance. It can be used for polyolefin plastics colouring, and also for polypropylene fibre raw liquor colouring. Excellent heat and weather resistance, red and yellow. It is considered to be the best of all red, yellow organic pigments.

Isodoline yellow has good firmness, but poor acid and alkali resistance. Pigment yellow 110 has strong red light, heat resistance of yellow can reach 290 C. It is red light yellow. The particle size distribution range of each commodity is different, the covering power is different, and the commodity with good covering power has strong red light. The viscosity of the coatings is small, and the gloss of the coatings is not affected by the addition of large quantities. However, the acid and alkali resistance is poor, so it is not suitable for the coating of amine curing agent. At 250 C or higher, the color light fades. The pigments of isoindolinone series and isoindolin series are yellow insoluble or slightly soluble in most solvents. They have excellent solvent resistance, migration resistance, acid-alkali resistance, oxidation-reduction resistance, heat resistance, heat resistance of about 400 degrees, good sun fastness and climate fastness, good migration resistance and chemical resistance, and are very wide. It is widely used in powder coatings.

Environmental protection: Traditional classical azo organic pigments have been widely used for coloring plastic products because of their uniform chromatogram, bright colour and reasonable price. However, due to their chemical structure and other factors, there are various defects in heat resistance, light resistance and migration resistance, especially in light colouring. In addition, the traditional series of benzidine yellow and orange pigments will decompose when they are used in polymer processing at temperatures exceeding 200 C. The decomposition products are monoazo compounds and aromatic amines. Dichlorobenzidine can also be produced when the temperature exceeds 240 C. The influence of pigment decomposition on human body and environment has attracted more and more attention. Huang 139 can fully meet the dispersibility, heat resistance and migration resistance of plastic coloring process. The colored products can have weather resistance, light resistance, solvent resistance and meet the requirements of food hygiene standards in the use environment.

3. Quinophthalone Yellow

PY 138 Quinophthalone Flavanone Green Light Yellow 8 > 200 US2005/0228078A1. Most of them are coarse grains with good fluidity, and high addition does not affect leveling. The specific surface area is small (25m2/g), which has high covering power, high dyeing power and good transparency. It has excellent light fastness, climate fastness, heat resistance, solvent resistance and migration resistance. Quinacridone Pigments



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