News Details
Chain polyamine crosslinking agent class coating
2017-4-3 15:38:40
Chain polyamine crosslinking agent class coating,The reaction of epoxy chloropropane and amine. Between benzene dimethylamine (MxPA) and epoxy chloropropane (ECH) reaction, chain polyamine after removing HCl, the crosslinking agent has good drug resistance, adhesion, corrosion resistance, amine flash sex resin crosslinking high flexibility. Adhesive peel strength is high.
WR - 112 type crosslinking agent has a similar structure. The crosslinking agent can underwater, with water, rust belt crosslinking, mainly used for anticorrosion coating. The coating after crosslinking has good flexibility, impact strength, solvent resistance, corrosion resistance.
Amine compounds, alkaline strength problem, is the most basic nature of the problem, such organisms under different environmental conditions, the strength of the produce different order. Factors that affect the basic strength are also different. Is the major influencing factors in the gaseous state, electronic effect; In aqueous solution, not only because of the influence of electronic effect, but also influenced by space effect and solvent effect. As long as we can grasp the environmental conditions, combine the three factors affecting its alkaline, can give a correct and reasonable judgment.
The current research and application practice results show that the performance of the coating quality, the choice of matrix resin is particularly important. Polyurethane resin with high and low tender toughness, wear resistance, prevent sand rain erosion and other excellent performance, but in terms of weather resistance and freeze resistance than fluorine resin and silicone resin; Acrylic resin with excellent weather resistance, corrosion resistance and adhesive ability, but in water resistance, flexibility, impact resistance and abrasion resistance is not ideal.
The reason of oil paint go: after coating, paint surface tension caused by uneven.
The paint was polluted is the main reason. The contaminated channels are:
A. spraying system, the supply of compressed air is contained in the oil - check air compressor suction, in addition to the oil, water, check the effect of oil-water separator;
B. tins, open container were contaminated by oil, grease, with a clean container with paint, paint before, first with water cleaning that day;
C. operators on oil pollution, especially in the winter hand use the oily skin, easy cause when grinding, with paint paint pollution - the operator to confirm don't have grease, washed with soap or first day the best water hands;
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.
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.
D. substrate pollution, including the fallout, long storage time after oil, polished, confirmed that no pollution on the substrate, if previous grind the interval time is too long, to burnish it again;
E. bottom coating pollution, including primer, coating by using additives in too much (e.g., flow ping agent), and additives to film the upper end of migration, the insufficient of light quality, polished, individual place be call again - grinding leakage, confirm the polish thoroughly.
The influence of the applied electric field, magnetic field;
Because the paint is a poor conductor of electricity, in the process of mixing and coating, due to the friction will produce a lot of static, when there is a strong electromagnetic field, will lead to serious oil. Such as in the use of electric welding machine, dc generator, the magnetic field near the strong confirmation of the existence of the instruments - such as coating without the existence of the above situation before coating.
(3) the operator body with strong static electricity, as stated in (2), paint surface often confronted with a lot of static electricity, when the operator electrostatic long enough, can lead to oil. This often happens in the winter and rainy season;
(4) the paint production process, the agents did not stir, results in excessive amounts of local agents cause;
5. Poor quality of the resin itself, such as molecular weight distribution is wide; A spray is too thick, or thickness is inconsistent
6. A coating is too thin; Thinners add too much, the viscosity is too low
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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