Paint additives, also known as paint accessories

Paint additives, also known as paint accessories, are auxiliary materials for the preparation of coatings, which can improve the performance of coatings and promote the formation
coating
. A wide range of
, including
drage agents
,
tougheners
, emulsions,
thickeners
,
pigment dispersants
,
blisters
,
leveling agents

,
anti-cortants
,
anti-lighting agents
, light stabilizers, anti-mold agents,
anti-static agents
(see
plastic additives
), etc., of which the largest amount is anti-drying agents and tougheners. At present, the research of coating additives, focusing on
additives for
latex paint, is
in
.
introduction
Coating Additives
Paint additives coating additives
coating additives are indispensable parts of coatings, it can improve the production process, maintain storage stability, improve construction conditions, improve product quality, give special functions. Reasonable and correct selection of additives can reduce costs and improve economic efficiency.
variety
over the years, coating additives a wide variety, and in the paint production at all stages have played a different role. The manufacturing stages are: triggers, dispersants, ester exchange catalysts, reaction processes are: de-foaming agents, emulsions, filtration aids, etc.; storage stages are: anti-cortides, anti-precipitation agents, thickeners, tactinolic agents, anti-floating color flowering agents, anti-gel gels, etc.; Plastic agents, de-foaming agents, etc. , film-forming stages are: polyging aids, adhesion promoters (also known as adhesion enhancers), light triggers, light stabilizers, drying, lighting, slip, anti-lighting, curing, cross-linking, catalysis and other additives, giving special functions such as: flame retardant, biocides, anti-algae, anti-static, conductive, corrosion inhibition, anti-rust and other additives.
In general terms, according to its use, the division includes adhesive enhancer, anti-adhesive agent, anti-shrink agent, anti-flowering agent, anti-floating color agent, de-foaming agent, anti-foaming agent, anti-gel agent, viscosity stabilizer, antioxidant, anti-corrosive agent, anti-flow hanging agent, anti-precipitation agent, anti-static agent, conductive control agent, anti-mold agent, anti-corrosion agent Agents, fusion aids, corrosion inhibitors, anti-rust agents, dispersants, wetting agents, detoxifiers, flame retardants, flow control agents, hammer-print additives, run-dryers, anti-light agents, light stabilizers, photosensitive agents, optical brighteners, plasticizers, adders, anti-scratch agents, thickeners, tentacles, rat bite inhibitors, other additives.
in addition to the main film-forming substances, pigments, solvents, an added to the coating, can make a coating or coating of a specific performance of a substance to play a significant improvement. The amount used in the coating formulation is very small. Mainly a variety of inorganic compounds and organic compounds, including polymer polymers.
are mostly named according to their function characteristics. To improve the production process of coatings are moisturizers, dispersants, emulsifiers, desostinizers and so on. To improve the storage performance and transportation of coatings are anti-sinking agents, anti-cortides, preservatives, freeze-thaw stabilizers and so on. To improve the paint construction performance and prevent paint film disease has anti-flow hanging agent, leveling agent, floating hair flower preventer, de bubble agent, thickener and so on. To improve the performance of the coating film and give special properties of UV absorbers, light stabilizers, flame retardants, anti-static agents, anti-mold agents.
coating additives can be divided into oily coating additives and water-based paint additives. In line with the increasing global attention to environmental protection, the development of water-based coating additives has made a leap forward. There are more and more new environmentally friendly types of additives. Applications are also becoming more and more widespread. Is the mainstream direction of the future development of coating additives.
details
dation agent
a class of substances that can speed up the coating of film dry knots, for dry oil film absorption of oxygen and double-bond polymerization to promote. 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 metals have a drying effect on oxides, salts and soaps, but the useful ones are 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, lining soap and pine soap.
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.
。