Types and uses of pigments and fillers commonly used in coating industry

The types and uses of pigments and fillers commonly used in the paint industry 2008 / 11 / 10 / 07:40 source: Huicong paint net Author: Murphy the development of modern paint industry is rapidly moving towards the direction of functionalization, high decoration, environmental protection and low cost, and in order to gain in each aspect or make a breakthrough, the improvement and development of the properties of pigments and fillers are essential Pigments and fillers play an important auxiliary role in the performance of coatings: pigments mainly give color and covering power to coatings; fillers mainly give texture to coatings and reduce costs It is one of the important factors that should be considered in the design of coating formulation to choose the appropriate type and dosage of pigments and fillers This is to introduce to you some high-quality pigments and fillers produced by Shenzhen jinlonghui Industrial Co., Ltd Wollastonite is a kind of calcium metaacid mineral Its chemical formula is Cosio 3 The theoretical chemical composition is Cao 48.3% and SiO 251.7% The Ca in wollastonite is often replaced by Fe, Mg, Ti and Sr Wollastonite is the only pure white filling material with needle like structure The application of wollastonite in coatings has been studied all the time Wollastonite has been widely and successfully used Practice has proved that wollastonite is an economic and safe filler Wollastonite jlh-sw3 / 4 / 6 Product Description: This product is made of natural wollastonite by ultra-fine grinding, with the characteristics of high purity, high whiteness, high fineness, even particle size distribution, etc., in the form of needle and fiber crystal Wollastonite can control the glossiness, reduce the surface roughness, heat resistance, moisture resistance, durability, corrosion resistance, and enhance its strength Its high hardness and low specific gravity are also the advantages of applying in coatings It is mainly used in construction, road marking, industry and powder coating Appearance: white structure: needle like composition: SiO2 ≥ 51, Cao ≥ 45, loss on ignition ≤ 1.0, whiteness ≥ 90, moisture ≤ 0.3, specific gravity: 2.9, pH value: 9.9, Mohs hardness: 4.5, sericite is a kind of mica mineral, a kind of flake fine-grained mother Sericite has many characteristics of mica and clay minerals Sericite powder can improve the weatherability and lightfastness of the coating, delay the pulverization, enhance the service life of the coating, improve the heat resistance, acid and alkali resistance of the coating, improve the impermeability of the coating, prevent the cracking and reduce the cracking As a system pigment, it can increase the fullness of the coating, share the covering power with the color pigment, and improve the service life of the coating Its luster does not affect color Sericite powder also has the function of thickening and anti sinking, prolonging the storage stability of the coating, as well as the function of anti algae and anti mildew It is commonly used in ships and marine coatings abroad Therefore, sericite is a kind of multifunctional filler with excellent price performance ratio Sericite powder cj-jlh1 / 3 / 4 / 5 / 7 / 8 Product Description: sericite, as a multi-functional powder filler with excellent price performance, has the characteristics of heat resistance, weather resistance, aging resistance, acid and alkaline resistance, mould resistance and corrosion resistance, and good film covering ability, which is suitable for high temperature coating, medium and high-grade exterior wall coating, powder coating, anti-corrosion and fireproof coating, ship coating and other special coatings Moderate price can reduce production cost Structure: flake composition: SiO2 ≥ 50.4, Al2O3 ≥ 28.3, Fe2O3 ≤ 1.0, K2O ≤ 8.6; oil absorption: 45; Whiteness: > 78; diameter thickness ratio: > 70; pH value: 5.5-7.5; use method of sericite powder: Sericite powder should be used in the process of coating pulping, when it is half of the time, adding 4-6% sericite powder has a good effect, do not add it at last At last, when the slurry is less thick, it is easy to float on the top, and it can only be lowered after stirring for a period of time, and the effect is the best when it is added halfway Test results of adding 4-6% of "chusericite" and "sericite powder" to exterior wall coating Name: adding 4-6% sericite powder without adding sericite powder 1 There is no hard block in the container, and there is certain thixotropy in uniform state after mixing, 2 Viscosity is 20-25 seconds > 30 seconds 3 Covering power is ≤ 300 g / m2 ≤ 200 g / m2 4 Water resistance is 92 hours without foaming No blistering in 240 hours 5 Alkali resistance > 92 hours > 240 hours 6 Scrub resistance > 600 times > 3000 times 7 Artificial aging resistance 250 hours after pulverization 1 class 2000 hours after pulverization 0 class discoloration 2 class discoloration 0 Class 8 Storage stability 3 months after slight precipitation 1 year after no precipitation Barium sulfate is a white or gray crystalline powder, which is a kind of barium bearing mineral It has the advantages of strong chemical inertia, good stability, acid and alkali resistance, moderate density and hardness, high whiteness, absorption of harmful rays, etc it has glass luster, non magnetism and non toxicity Product Description: barium sulfate is used as the filler of paint and paint It is suitable for controlling the consistency of paint, making the product bright, stable and easy to color Appearance and properties: white rhombic crystal composition: BaSO4 98-99%, SiO2 < 0.9, Whiteness: 92-95, oil absorption: 10-15, water content: < 0.2, loss on Ignition: 0.1-0.9, pH value: 6.5-8 Kaolin is a kind of clay mainly composed of kaolinite After the feldspar is completely weathered, kaolin, quartz and soluble salts will be formed; then it will drift to other places with rainwater and rivers and be deposited again At this time, quartz and soluble salts have been separated and kaolin can be obtained Product Description: main chemical composition of kaolin jlh-60 SiO2Al2O3 fe2o3tio3 Cao MgO na2o52 ± 0.545 ± 0.5 < 0.3 < 0.5 < 0.3 < 0.2 < 0.15 physical index of kaolin jlh-60 whiteness 93 screen residue (325 mesh) 0 dispersibility 22.5 oil absorption 44.4 pH 6.7-7.6 water content ≤ 0.5% refractive index 1.62 bulk density 0.33g/cm3 It is widely used in latex paint, powder coating, paint, plastic, white card paper, cast coating paper, light coating paper, copper plate paper, thermal paper, carbon free carbon copy paper and other coating processing paper It has the advantages of good suspension, easy dispersion, strong covering power and high purity It can play a good role in preventing precipitation when used in waterborne paint, and it is also a good inorganic thickener Adding the product to coating to process coated paper and paperboard can improve whiteness, smoothness and opacity Calcined kaolin has good loose thickness and elasticity, which is more suitable for intaglio printing, and it is not easy to produce screen leakage and spots in printing In cable rubber production and plastic industry, it can increase its wear resistance, strength and impact resistance, and increase the elongation