News Details
Paint the effects of crosslinking agent on the performance
2017-4-8 11:48:16
Paint the effects of crosslinking agent on the performance,Poly (aspartic acid ester coatings have excellent uv resistance, must be selected to match the aliphatic isocyanate crosslinking agent. Research shows that not all of the HDI trimer can have long weatherability. Here choose crosslinking agent resin as the main body.
Because of poly (aspartic acid ester unique molecular structure, molecular weight is small, the film after crosslinking density is bigger, have certain contractility, easy cause coating internal stress concentration, so the best join flexible crosslinking agent to improve it. Add 10-15% elastic crosslinking agent SP - 103 - p, can make the coating impact test are more than 50 kg. On both sides of the cm. This is a kind of uv radiation is very good elasticity of crosslinking agent, can ensure that the coating has enough toughness.
Ordinary silicone additives and the compatibility of poly (aspartic acid ester is limited, prone to shrinkage, dark, paint film defects such as loss of light. Must select good agents, flow ping agent with EFKA3600 and BYK333, is a good choice.
Ultraviolet absorbent uv radiation is the basic principle of the specific groups of molecules absorb certain wavelengths of ultraviolet photons, electrons are to high from the ground state energy orbit, leads to the formation of a molecular rearrangement excited states, unstable excited state structure transition back in ground state, to restore the original structure, release energy at the same time, the energy released in the form of heat release. Cycling will film can absorb ultraviolet light is converted into heat energy lost constantly. Relation between delta E = hc/lambda, h is Planck's constant, lambda as the wavelength of ultraviolet light, delta E to release heat.
So join uv absorber, helps to improve the polyurea coating uv resistance. Recommend to add quantity formula of 0.5 2.0%.
This product contains solids content over 90%, 40% of titanium dioxide pigments, coatings than major, easily deposited on the bottom, so you must solve the problem of the settlement of pigment. Commonly used anti-settling agents have organic bentonite, the gas phase silica, polyamide wax, polyethylene wax, etc. Gas phase silica dispersed more difficult in this system, polyethylene wax, polyamide wax have negative effects on polyurea coatings gel time, choose organic bentonite as anti-settling agent here. The agent also can solve the flow of paint in the facade in thick hang problem.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Pigment oil absorption and weathering resistance, low oil absorption of the pigments can guarantee to develop high solid and low viscosity of paint coating, weatherability good pigment to ensure adequate durability, the formula of rutile type titanium pigment and black pigment FW200 high. Made from grey paint. Titanium pigment addition amount of 40% to ensure that the coating has enough covering power.
Poly (aspartic acid ester resin gel time associated with the catalysis of many small molecules. Research indicates that small molecular compounds containing hydroxyl of NH/NCO has obvious catalysis reaction, such as methanol, ethanol, ethylene glycol, water, etc., can greatly shorten the coating of the activation period. So, poly (aspartic acid ester polyurea coatings should avoid alcohol mixed with water and low molecule. Add in addition to the agent or molecular sieve in formula can yet be regarded as an effective means.
Polyurea paint coating and all kinds of paint, because the proportion of various pigments, particle size, coating film-forming process Bella DE vortex formation, causing uneven color. Join can reduce the surface tension of organic silicon fertilizer, can effectively prevent the floating color or hair flower phenomenon to appear.
Due to poly (aspartic acid ester resin can make low high solid coating, effectively reduce the VOC content, in theory, can make no solvent paint, considering the need of actual construction, solid content at 90% when compared commonly suitable for construction, with the aid of high-pressure airless spraying, a construction can reach more than 300 microns.
Poly (aspartic acid ester polyurea coatings uv resistant performance is very outstanding, 4000 h uv accelerated aging test results, the color difference delta E = 2.9, below industrial paint the upper limit of the delta E of 3.0 or less; Lost 15%, lower than the upper limit of 30%, the results are very close to the fluorine carbon coating of uv resistance. If compared with the acrylic polyurethane coating, which is normally only pass the test of 1000 h ultraviolet ray.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Because of poly (aspartic acid ester unique molecular structure, molecular weight is small, the film after crosslinking density is bigger, have certain contractility, easy cause coating internal stress concentration, so the best join flexible crosslinking agent to improve it. Add 10-15% elastic crosslinking agent SP - 103 - p, can make the coating impact test are more than 50 kg. On both sides of the cm. This is a kind of uv radiation is very good elasticity of crosslinking agent, can ensure that the coating has enough toughness.
Ordinary silicone additives and the compatibility of poly (aspartic acid ester is limited, prone to shrinkage, dark, paint film defects such as loss of light. Must select good agents, flow ping agent with EFKA3600 and BYK333, is a good choice.
Ultraviolet absorbent uv radiation is the basic principle of the specific groups of molecules absorb certain wavelengths of ultraviolet photons, electrons are to high from the ground state energy orbit, leads to the formation of a molecular rearrangement excited states, unstable excited state structure transition back in ground state, to restore the original structure, release energy at the same time, the energy released in the form of heat release. Cycling will film can absorb ultraviolet light is converted into heat energy lost constantly. Relation between delta E = hc/lambda, h is Planck's constant, lambda as the wavelength of ultraviolet light, delta E to release heat.
So join uv absorber, helps to improve the polyurea coating uv resistance. Recommend to add quantity formula of 0.5 2.0%.
This product contains solids content over 90%, 40% of titanium dioxide pigments, coatings than major, easily deposited on the bottom, so you must solve the problem of the settlement of pigment. Commonly used anti-settling agents have organic bentonite, the gas phase silica, polyamide wax, polyethylene wax, etc. Gas phase silica dispersed more difficult in this system, polyethylene wax, polyamide wax have negative effects on polyurea coatings gel time, choose organic bentonite as anti-settling agent here. The agent also can solve the flow of paint in the facade in thick hang problem.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Pigment oil absorption and weathering resistance, low oil absorption of the pigments can guarantee to develop high solid and low viscosity of paint coating, weatherability good pigment to ensure adequate durability, the formula of rutile type titanium pigment and black pigment FW200 high. Made from grey paint. Titanium pigment addition amount of 40% to ensure that the coating has enough covering power.
Poly (aspartic acid ester resin gel time associated with the catalysis of many small molecules. Research indicates that small molecular compounds containing hydroxyl of NH/NCO has obvious catalysis reaction, such as methanol, ethanol, ethylene glycol, water, etc., can greatly shorten the coating of the activation period. So, poly (aspartic acid ester polyurea coatings should avoid alcohol mixed with water and low molecule. Add in addition to the agent or molecular sieve in formula can yet be regarded as an effective means.
Polyurea paint coating and all kinds of paint, because the proportion of various pigments, particle size, coating film-forming process Bella DE vortex formation, causing uneven color. Join can reduce the surface tension of organic silicon fertilizer, can effectively prevent the floating color or hair flower phenomenon to appear.
Due to poly (aspartic acid ester resin can make low high solid coating, effectively reduce the VOC content, in theory, can make no solvent paint, considering the need of actual construction, solid content at 90% when compared commonly suitable for construction, with the aid of high-pressure airless spraying, a construction can reach more than 300 microns.
Poly (aspartic acid ester polyurea coatings uv resistant performance is very outstanding, 4000 h uv accelerated aging test results, the color difference delta E = 2.9, below industrial paint the upper limit of the delta E of 3.0 or less; Lost 15%, lower than the upper limit of 30%, the results are very close to the fluorine carbon coating of uv resistance. If compared with the acrylic polyurethane coating, which is normally only pass the test of 1000 h ultraviolet ray.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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