you want to know about acrylic resin, here are

coatings are widely used in automobiles, furniture, construction and other aspects. They can not only improve their aesthetics, but also play a protective role and extend their service life. However, if you want to make a good coating, the most important part is the resin. It is conceivable that the resin is very important in the production of coatings. So, next, Xiao Bian will introduce today's leading role to everyone:acrylic resin

acrylic resinis a copolymer composed of methacrylate, acrylate and vinyl monomers. Compared with other synthetic polymer resin materials, acrylic resin materials have very obvious advantages, such as light resistance, weather resistance, durability, and heat resistance. It will not change color at 230°C and has good acid and alkali corrosion resistance. In the automobile, home appliances, construction, plastic products and other aspects of the application is more and more widely. Combined with different resin structures and production processes, acrylic numerical coatings can be divided into several different types.

is stability, including UV resistance, acid and alkali resistance, chemical resistance, etc. Acrylic acid ester numerical value because of the existence of a-H, its oxidation resistance and UV resistance is lower than the methacrylate resin. Acrylic resin with C- C bond as the main chain, has a very good oxidation resistance, acid and alkali resistance and hydrolysis resistance. On the other hand is the mechanical properties, the mechanical properties of acrylic resin include elongation, hardness, toughness, etc., these properties are largely affected by the polymer molecular structure density factors. With the growth of the side chain, the tensile strength and hardness of acrylic resin decreased significantly, and the elongation and flexibility increased significantly. Polymethacrylate has a methyl group at its a-position, which greatly restricts the rotational movement of the C- C main chain. There is no a-methyl group in polyacrylate, and each chain can rotate around the main chain, which is the reason why polymethacrylate has good hardness and tensile strength, and its flexibility and elongation are worse than polyacrylate.

acrylic resin takes free radical reaction as the basic reaction, which can be divided into three processes: chain initiation, chain growth and chain termination, and the whole process is accompanied by chain transfer. In the process of synthesizing thermoplastic acrylic resin, it is necessary to control the molecular weight and molecular weight distribution. Although the mechanical properties of the paint film will be significantly improved with the increase of molecular weight, the solution viscosity of the paint film will also increase significantly and reduce the solid content. In addition, with the increase of molecular weight, it is easy to reduce its solubility. Thermoplastic acrylic resins currently in commercial use have molecular weights of about 80000 to 90000.

molecular weight and molecular weight distribution are also easily affected by factors such as monomer feeding methods and initiator types. When benzoyl peroxide is selected as the initiator, the benzoyl radical will decompose and become a highly active wave type radical, which is prone to branching reaction and deprives the hydrogen atoms of the monomer or polymer molecular chain. Especially with the increase of temperature, a large number of branches will appear above 130 ℃, increasing the molecular weight distribution. In terms of monomer feeding mode, the intermittent feeding method is selected to obtain a wide molecular weight distribution, and the semi-continuous drop method and continuous drop method are selected to obtain a narrow molecular weight distribution value. Generally, the solvent is first added to the reaction kettle, and the reaction temperature is increased, and then the mixture is continuously added at a certain speed to maintain the normal concentration of the monomer and the initiator in the reaction kettle. The monomer concentration in the reaction vessel is essentially constant if the monomer addition rate is capable of maintaining the normal polymerization temperature. In the vinyl monomer copolymer reaction, it is also necessary to fully analyze the monomer reactivity ratio. If the reaction rate constants of each monomer are similar, the molecular chain structure can be regarded as random distribution. If the reaction rate constants of each monomer are very different, the batch feeding method will easily affect the uniformity of molecular chain composition. The semi-continuous dropping method and continuous dropping method are selected to control the monomer dropping acceleration and keep consistent with the polymerization speed, and the average composition molecular chain can be obtained.

acrylate coating raw materials from petrochemical production, low cost, has a very rich resource reserves. Acrylate coatings in the development process in order to achieve the improvement of performance, reduce production costs, but also need to use acrylamide, styrene and other olefin monomer tools, the characteristics of different copolymers are different, need to combine the specific requirements of the product, clear different types of coatings.

acrylate coating is concentrated in the following aspects: first, it has very good gloss and can be made into water white varnish or pure white white enamel; Second, it has very good light resistance, which will not yellow or decompose under ultraviolet irradiation, and can maintain its original color for a long time. Third, it has good heat resistance and can be used as a neutral coating, mixed with aluminum powder and copper powder, etc., with the same color as gold and silver, acid and alkali corrosion resistance, resistant to grease; Fourth, it can be stored for a long time without deterioration.

Because of the good performance of acrylate coatings, it is currently widely used in automotive decoration, home appliances, machinery, instrumentation, construction, leather and other fields. It is a new type of high-quality coatings. It can be divided into three different types: solvent-based acrylate coatings, water-based acrylate coatings, and solvent-free acrylate coatings.

Solvent-based acrylate coatings are divided into two categories: thermoplastic and thermoset. Thermoplastic acrylate coatings are more suitable for application in industrial and other fields, such as building exterior wall spraying, automobile repair paint, etc., in order to achieve effective control of environmental pollution problems, non-photoactive solvents can be used. Thermosetting acrylate coatings include hydroxyl acrylate coatings, epoxy acrylate coatings, etc. The curing agent is amino resin, which can be applied to household appliances, automobile topcoat, etc. Polyisocyanate is selected as curing agent, which can be applied to automobile topcoat, building exterior wall coating, etc. Polyamine or polyacid is selected as curing agent, which can be applied to can spraying, etc. Epoxy resin is selected as curing agent, which can be applied to can spraying, etc. Melamine resin is selected as curing agent, it can be used in the bottom and middle coatings, and also has a very good application effect in furniture metal coatings.

waterborne acrylate latex paint is divided into thermoplastic acrylate latex paint and thermosetting acrylate latex paint. Thermoplastic acrylate latex paint is mainly used in building exterior wall paint, waterborne road marking paint, metal anti-corrosion coating, etc. Thermosetting acrylate latex paint has emulsion type, water dilution and aqueous solution type, emulsion type is used in road sign paint, building interior and exterior wall paint, etc. Water dilution is mainly used in automobile electrophoresis primer, aluminum door and window frames, etc; aqueous solution is mainly used in automotive primer, household parts coating, etc.

Solvent-free acrylate coatings mainly refer to thermosetting UV-curable coatings and thermosetting acrylate powder coatings, of which UV-curable coatings are used in optical fiber coatings, wood coatings, plastic coatings, etc.; acrylate powder coatings are used in guardrails Coatings, aluminum wheel coatings, etc., have been applied in automotive varnish and other fields.

water-based coating technology started late, the current process gradually mature, has the characteristics of environmental protection and energy saving, has gradually developed into a major development direction of modern coatings, its varieties, functions and uses more and more perfect. In the water-based coatings currently developed, in terms of curing temperature, foreign latex paints can be cured at a temperature of 2°C. In the scope of application, architectural coatings are the most widely used, and waterborne polyurethane coatings have been successfully developed. The successful development of acrylate emulsion lays a good foundation for the realization of waterborne coatings. In the practical application process, acrylate emulsion has good performance, with no pollution and other characteristics, but also can be configured into the construction performance of excellent coating, the use of safety can be effectively guaranteed. The composition of water-based acrylate is relatively simple, and it is difficult to meet the actual needs of high-performance audio-visual field. The use of epoxy resin modified acrylic resin, can obtain a good performance of water-based anti-corrosion and anti-rust coatings, the use of silicone modified acrylic phenol, but also can obtain excellent performance of water-based architectural coatings.

acrylate coating has very excellent performance in practical application, and is widely used in automobile decoration, household appliances, machinery, instruments, construction, leather and other fields. It belongs to a new type of high-quality coating, including solvent-based acrylate coating, water-based acrylate coating, solvent-free acrylate coating and other different types. In the actual use process of acrylate coating, different curing agents can be added according to actual needs to make it have different properties, better meet the requirements of use.

the above is some information compiled for you, rightacrylic resininterested friends can contact us. We have deep attainments in the resin industry.