News Details
Crosslinking agent HDI trimer coating
2017-4-8 11:48:13
Crosslinking agent HDI trimer coating,The new structure of poly (aspartic acid ester resin and HDI trimer crosslinking agent, gel time in more than 50 min.
Selection of poly (aspartic acid ester resin has a decisive influence on the coating performance. Resin is a kind of traditional F520 poly (amino resin, the resin is characteristic of good compatibility, coating appearance appear a plump, activation of construction period is long.
Because F520 - NH groups in the molecular structure of coronary alkyl side chain, combined with its ortho methyl steric hindrance effect of naphthenic chain, prevented the NHR groups and isocyanate - NCO group after reaction film formed by the molecular chain of free rotation, causes the coating glass transition temperature (Tg), high impact resistance is poor.
Research has shown that with the HDI 3 get together the system into a film, began to brittle under 10 ℃, and adhesion to the base material lost entirely. Therefore its performance must be modified.
One of the traditional modification method is to join the hydroxyl acrylic resin, and join the amount to be very big, this method is equivalent to use F520 poly (aspartic acid ester modified acrylic resin, limited effect, lost the actual meaning.
The second approach is to join F420 (or bayer NH1420), can achieve the goal of brittleness is greatly improved. But F420 alone with HDI trimer reaction, activation period 20 min or less, when match with F520 resin 1:1 ratio, activation period is less than 30 min, and coating surface drying time more than 3 h, is to focus on the two shortcomings, hard to accepted by users, this should be a poly (aspartic acid ester as a kind of excellent high polymer material, but hard to root cause of the smooth promotion in the coating industry.
And the compatibility with organic silicon fertilizer is far better than F420, greatly improve the coating appearance. F524 match with big F520 resin with 1:1 ratio, low as high solid coating, best performance, the construction period of 2 to 3 h activation, coating surface drying time of 1 h, the move smoothly to solve the construction problems of poly (aspartic acid ester coatings.
Resistance to ultraviolet radiation (QUV) test: test basis: ASTMD4587-2005; Test instrument, including the QUV accelerated aging test chamber, SM - 4-2 computer color, gloss meter UGV - 5 d type
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Salt spray test: stroke, 3% neutral salt spray test, the test according to GB/T1771-2007; Testing instrument SQ - 500 - S salt spray test chamber.
D2925 resin is 60% solids aggregation type macromolecule poly (aspartic acid ester compounds, gel time is longer, better flexibility, suitable for crosslinking agent to cooperate do with elastic coating, appropriate to add can better improve the physical and mechanical properties of coating and construction performance. In the coating formula dosage is approximately 10%.
Even if these solvents as cosolvent could also play a role in synergy, significantly improve coating construction, and other comprehensive performance. Of course, we should fully consider the resources available and cost and other factors.
Diacetone alcohol its molecule contains a ketone and one hydroxyl group. So are many resin such as alkyd resin, epoxy resin, poly vinyl acetate resin and good solvent of cellulose acetate. Its boiling point is 166 ℃, due to the strong hydrogen bonding interaction, relative evaporation rate of 0. 15. Diacetone alcohol applies only to vinyl resin coating is not enough, other plastics coatings and coil coatings can also be used in great quantities, in fact, diacetone alcohol for cellulose ether, acrylic resin, benzene, oxygen resin and epoxy resin has very strong solvency.
Ethanol solvent is a kind of oxygenated solvent, mainly low carbon alcohol ether glycol and propylene glycol. As well as composition of ether bond, another hydroxyl. , the former has a hydrophilic soluble hydrophobic compounds, which is hydrophilic, the solubility of water-soluble compounds. Ethanol solvent in solvent mixed with other solvents used in the coating, the characteristic is in most remained after solvent evaporation coating flow property.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Selection of poly (aspartic acid ester resin has a decisive influence on the coating performance. Resin is a kind of traditional F520 poly (amino resin, the resin is characteristic of good compatibility, coating appearance appear a plump, activation of construction period is long.
Because F520 - NH groups in the molecular structure of coronary alkyl side chain, combined with its ortho methyl steric hindrance effect of naphthenic chain, prevented the NHR groups and isocyanate - NCO group after reaction film formed by the molecular chain of free rotation, causes the coating glass transition temperature (Tg), high impact resistance is poor.
Research has shown that with the HDI 3 get together the system into a film, began to brittle under 10 ℃, and adhesion to the base material lost entirely. Therefore its performance must be modified.
One of the traditional modification method is to join the hydroxyl acrylic resin, and join the amount to be very big, this method is equivalent to use F520 poly (aspartic acid ester modified acrylic resin, limited effect, lost the actual meaning.
The second approach is to join F420 (or bayer NH1420), can achieve the goal of brittleness is greatly improved. But F420 alone with HDI trimer reaction, activation period 20 min or less, when match with F520 resin 1:1 ratio, activation period is less than 30 min, and coating surface drying time more than 3 h, is to focus on the two shortcomings, hard to accepted by users, this should be a poly (aspartic acid ester as a kind of excellent high polymer material, but hard to root cause of the smooth promotion in the coating industry.
And the compatibility with organic silicon fertilizer is far better than F420, greatly improve the coating appearance. F524 match with big F520 resin with 1:1 ratio, low as high solid coating, best performance, the construction period of 2 to 3 h activation, coating surface drying time of 1 h, the move smoothly to solve the construction problems of poly (aspartic acid ester coatings.
Resistance to ultraviolet radiation (QUV) test: test basis: ASTMD4587-2005; Test instrument, including the QUV accelerated aging test chamber, SM - 4-2 computer color, gloss meter UGV - 5 d type
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Salt spray test: stroke, 3% neutral salt spray test, the test according to GB/T1771-2007; Testing instrument SQ - 500 - S salt spray test chamber.
D2925 resin is 60% solids aggregation type macromolecule poly (aspartic acid ester compounds, gel time is longer, better flexibility, suitable for crosslinking agent to cooperate do with elastic coating, appropriate to add can better improve the physical and mechanical properties of coating and construction performance. In the coating formula dosage is approximately 10%.
Even if these solvents as cosolvent could also play a role in synergy, significantly improve coating construction, and other comprehensive performance. Of course, we should fully consider the resources available and cost and other factors.
Diacetone alcohol its molecule contains a ketone and one hydroxyl group. So are many resin such as alkyd resin, epoxy resin, poly vinyl acetate resin and good solvent of cellulose acetate. Its boiling point is 166 ℃, due to the strong hydrogen bonding interaction, relative evaporation rate of 0. 15. Diacetone alcohol applies only to vinyl resin coating is not enough, other plastics coatings and coil coatings can also be used in great quantities, in fact, diacetone alcohol for cellulose ether, acrylic resin, benzene, oxygen resin and epoxy resin has very strong solvency.
Ethanol solvent is a kind of oxygenated solvent, mainly low carbon alcohol ether glycol and propylene glycol. As well as composition of ether bond, another hydroxyl. , the former has a hydrophilic soluble hydrophobic compounds, which is hydrophilic, the solubility of water-soluble compounds. Ethanol solvent in solvent mixed with other solvents used in the coating, the characteristic is in most remained after solvent evaporation coating flow property.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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