News Details
Modified fatty amine coating crosslinking agent
2017-8-31 23:01:08
Modified fatty amine coating crosslinking agent
The crosslinking agent of modified fatty amine coating is fast, the anti-cathodic stripping performance and anti-bending performance are better, but the film has poor heat resistance.
The crosslinking agent of the modified mannesine crosslinking agent is slow, the anti-bending performance, the anti-cathodic stripping performance, the heat resistance performance and the adhesion are poor. The crosslinking agent of modified fatty cyclic amine is fast and the film has good heat resistance, but the anti-bending and cathodic stripping performance is worse than that of modified fatty amine crosslinking agent.
In modified alicyclic amine crosslinking agent mixing different proportion of modified alicyclic amine obviously improved after the heat resistant coating performance, integrated the advantages of two kinds of crosslinking agent in modified alicyclic amine crosslinking agent and crosslinking agent modified alicyclic amine ratio of 5:1, the comprehensive performance of the coating can meet the requirements. Therefore, it is determined that the mixture ratio of modified fatty amine and modified lipid cycline is 5:1 as the crosslinking agent of the coating.
Research on facial filler. The rational configuration of facial filler is very important for coating performance. The rational use of filler can increase the viscosity of paint, improving its thixotropy, prevent flow, increase the coating thickness, improve the mechanical properties of the coating, anticorrosion, compactness and adhesion, reduce the resin shrinkage after crosslinking, improve the heat transfer and resistance to water permeability of the coating, and to a certain extent, can reduce the cost of the product.
This study considers the coating resistance, cathodic stripping, heat resistance, abrasion resistance and coating thickness. Titanium white powder, high density, low oil absorption value, can effectively improve the coating. High hardness of green silicon carbide, excellent wear resistance, excellent cathodic stripping performance.
Sericite powder is a flake structure, which can effectively prevent the penetration of chemical medium, and present a certain elasticity in the coating. It is complementary to titanium white powder and green silicon carbide.
Modified silicon powder in silicon powder surface coating a layer of can and epoxy resin coating and metal substrate to form chemical bonds, which can enhance packing and film-forming resin, filler and bonding force between the metal base material, the packing also has lower particle size, better able to fill the space between the other packing.
Chinese name: Diethyl toluene diamine(DETDA)Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
The selection of fillers is made up of short supply, which enhances the coating resistance to cathodic stripping performance, abrasion resistance, chemical resistance, corrosion resistance and bending resistance. Therefore, the application of titanium white powder, green silicon carbide, sericite powder, modified silica powder, etc.
In this study, it is necessary to have the physical and chemical properties of epoxy powder coated with epoxy powder coating.
At present, the domestic epoxy powder coating used for external anticorrosion double the thickness of the design in about 800 microns, in order to ensure that the scene for the thinnest point meet the thickness requirements, the development of joint coating thickness of a film to be more than 1000 microns, and require coating system has lower viscosity, facilitate the site construction.
Therefore, by choosing different coating thixotropic agent on the thixotropy of experiment research, give the paint by higher viscosity at low shear and high shear with low viscosity, to prevent the occurrence of flow after the paint coated hang wait for a phenomenon, and to make sure that the flow flat paint better sex.
Because the viscosity of liquid epoxy resin decreases with temperature, the viscosity of solvent-free epoxy coating decreases with the increase of temperature.
The best way to use the spray is to use a dual tube feed high-pressure airless spraying device with a heating device. In advance of the solventless epoxy for coating A and B components are preheated, preheat sticky solventless epoxy for coating to 45 + / - 5 ℃, in order to lower the viscosity of the coating, satisfy the feed and atomizing pressure, at the same time due to the coating of A and B component feed, respectively, according to the proportion of mixture in the mixing chamber after spraying out quickly, avoid the premixed because of solventless epoxy for paint after the operation of the pot life is too short and cause implosion gun construction problems.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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