Coating classification: wear-resistant agent for coating

Core tip: Introduction: The gradual damage of coatings in many aspects has been paid more and more attention In the process of using the coating film, friction is inevitable, especially in household goods, public facilities and roads However, the wear of the coating film caused by friction is expected to be avoided as much as possible Wear resistant agent for coating is an additive to improve the wear resistance of coating After the wear-resistant agent is added to bear the friction in the use process, the abrasion loss of the coating caused by the friction is reduced, thus the service life and service cycle of the coating can be prolonged, or the processability can be improved application Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: Introduction: paint in many aspects of gradual damage, has been more and more attention In the process of using the coating film, friction is inevitable, especially in household goods, public facilities and roads However, the wear of the coating film caused by friction is expected to be avoided as much as possible Wear resistant agent for coating is an additive to improve the wear resistance of coating After the wear-resistant agent is added to bear the friction in the use process, the abrasion loss of the coating caused by the friction is reduced, thus the service life and service cycle of the coating can be prolonged, or the processability can be improved Application mechanism: the abrasion resistance of the film refers to the ability of the film to resist friction, abrasion and erosion, which is related to many properties of the film, including hardness, scratch resistance, cohesion, tensile strength, elastic modulus and toughness, etc It is generally believed that the influence of toughness of the coating on its wear resistance is greater than that of hardness of the coating on its wear resistance After the coating is added with wear-resistant agent and cured, most of the wear-resistant agent can protrude slightly from the coating surface, and it is evenly distributed When the coating is subject to friction behavior, the wear part first protrudes from the highest part of the coating surface, that is, the wear-resistant agent part In fact, the coating is protected from or less friction During the use of the coating, the wear-resistant agent is like "bone material" and "shares" the friction force that the coating bears, thus prolonging the service cycle of the coating and endowing the coating with wear resistance Main categories: wear-resistant agents for coating can be divided into two categories: ① inorganic substances such as glass fiber, glass flake, silicon carbide, fine-grained alumina, ore powder, metal flake, etc.; ② synthetic organic materials such as inert polymer materials (such as PVC particles, rubber powder, polyamide particles, polyarylsodium particles, etc.) The necessary condition for the use of synthetic organic materials as wear-resistant agents is that they must be inert, chemically reactive with different coating substrates and insoluble in the solvent used in the coating Compared with "antiskid agent", the type of wear-resistant agent is almost the same as that of wear-resistant agent and antiskid agent Therefore, in the coating, wear-resistant agent is added to obtain wear-resistant effect, but also to obtain a certain degree of skid resistance It is worth noting that when used as wear-resistant agent, the particle size is required to be much smaller According to different requirements, wear-resistant agents need to be processed into different shapes and sizes Test method of wear resistance effect: the wear resistance of the coating is a kind of ability of the coating to resist friction, scratch and erosion In actual use, the actual wear resistance effect is tested by bearing friction In the laboratory, the accelerated wear of the instrument is used for parallel comparison or comparison with the blank sample to check its wear resistance At present, there are three kinds of instruments to accelerate the examination of the abrasion resistance of the coating ① Taber abrasivetor Taber abrasivetor is an instrument to test the wear resistance of flat coated formwork A pair of abrasive wheels, which are different types of grinding wheels with different roughness and have different quality weights placed on them, have wear effect The suitable grinding wheel and weight can be selected according to the wear resistance of the coating ② Taber sand conveyor the Taber sand conveyor is used in combination with the abrasion tester to evaluate the abrasion resistance of the coating It is to introduce the wear effect of loose sand and the rotation effect of grinding wheel, which leads to the physical damage of coating Use the vacuum system to remove the film chips and used sand particles which are worn and dropped continuously The Taber sand conveyor is especially suitable for testing the wear resistance of the coating film on the ground and the coating layer on the elastic ground ③ Washability (wear resistance) tester washability (wear resistance) tester is another type of experimental wear tester It is to use brush or sand brush to make reciprocating motion on the coating surface, and add soap liquid or friction medium to accelerate simulation and tearing The machine is suitable for testing the wear resistance of building coatings Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,