Detailed introduction of several coating additives

The drying agent
a class of substances that can speed up the coating of dry knots, which promotes the absorption of oxygen and the polymerization of double bonds of dry oil film. It reduces the dry closing time of the oil film from a few days to several hours, makes construction easy and prevents contamination and damage of the uncooled film.
Many metal oxides, salts and soaps have a drying effect, but the practical value is lead oxide (red dan, yellow dan), manganese dioxide, lead acetate, lead nitrate, manganese sulfate, manganese chloride, manganese borate, manganese acetate, cobalt acetate, cobalt chloride and lead, cobalt, manganese cyclane soap, linotolate soap and pine soap
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the oil solubility of soap-type drying agent is good, so the potent effect is higher. Modern coating industry uses cyclane acid soap as a drying agent. Cyclane-acid soaps are usually produced by compound decomposition.
amount of drying agents in oily coatings depends on the amount of dry or semi-dry oil. Taking dry flax oil as an example, the amount of lead drying agent (in lead terms) is 0.4 to 0.5% of the oil quality, and the cobalt and manganese are stronger than lead, and the ratio of cobalt, manganese and lead is about 8:1:40. Two or three types of metal soaps work together. In resin coatings, increase the amount of drying agent.
the plasticizer
plasticizer (see Plastic Additives). The varieties commonly used in the coating industry are phthalates, triglycerides, triclosan phosphates, triclosan phosphates and some special varieties.
thickeners
substances that improve paint viscosity and reduce their mobility. An important purpose of using thickeners is to reduce the flow of coating. Thickeners used in coatings mainly include the following categories: (1) white carbon black, (2) bentonish and organic bentonish (bentonish soil treated with cation organic matter) ;(3) surface-treated activated calcium carbonate micro Grains; (4) hydrogenated castor oil; (5) metal soaps, such as calcium stingrate, aluminum stingrate, zinc stry acid, etc.; (6) polymerized vegetable oils and fatty acids dispolymers and polyols.
pigment dispersants are
used to prevent pigments from sinking or floating. Thickeners such as bento and organic bento, metal soap and hydrogenated castor oil can play the role of pigment dispersants. Various surfactants, low molecular weight polyethylene oxide (polyethylene oxide), low viscosity methyl silicone oil, lecithin and its derivatives are also commonly used.
leveling agent
helps to form a smooth finish. Substances that reduce surface stress in coatings generally have the effect of leveling agents. The leveling agents used in industry are fluorine-containing surfactants, polyacrylates and polyethylene alcohol butyl. General silicone leveling agent is to control short-wave leveling, reduce surface pressure is more obvious, acrylic is to control long-wave level, reduce surface pressure is small.
anti-cortants
substances that prevent oily coatings from corring on the surface in use, such as methyl ethyl ketonesand cyclohexone.
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