News Details
Water-based saturated polyester and amino coating crosslinking agent
2017-6-14 10:55:31
Water-based saturated polyester and amino coating crosslinking agent
The performance of water-based saturated polyester and amino coil coatings is quite good. The gloss can meet the level of oil saturated polyester resin; Because of the presence of carboxyl group, it is good for various materials, not inferior to solvent saturated polyester resin. The hardness and flexibility of the saturated polyester and amino coil coatings can achieve a good balance.
Wipe MEK resistance is quite good, because the water of carboxyl of the catalytic curing of unsaturated polyester resin, the curing reaction even without additional catalyst can under the lower temperature, so under the condition of the same baking, water saturated polyester - amino crosslinking reaction activity of coil coatings is higher than the solvent, wipe MEK resistance is better. Weather-resistant water saturated polyester - amino coil coating is comparable to solvent.
The effect of solvent on saturated polyester polyester. Cosolvent on water saturated unsaturated polyester not only role to play in balancing, solubility and viscosity, but also to the whole coating system mixing solubility, viscosity, wettability and the rheological properties of film forming process.
With ethylene glycol monobutyl ether (BCS) as an example, the water in the saturated polyester dispersion cosolvent (BCS) dosage, the greater the same solid content the higher the viscosity will be, will also cause the final construction of dilution ratio is increased. The solid content of the saturated polyester should be raised as high as possible, the solid content is too low, while the solid portion of the final coating is too low.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
To this end, we also introduced the solid form of water dispersible saturated polyester resin, customers can adjust the formula is very flexible, you can get a lower VOC coating. The addition of n-butanol to the paint formula can improve the viscosity of the coating and the overall surface tension of the coating will decrease.
The speed of the NBA is much bigger than water, the paint is coated, the NBA is volatilizing rapidly, which can reduce the viscosity of the paint, thereby improving the overall level of the coating.
By using highly active water saturated polyester resin and water-based amino resin, preparation of both environmental protection and energy saving can be high processability and chemical resistance water saturated polyester - amino coil coatings, thus greatly promote the use and development of water-based coatings. With the improvement of environmental protection and health awareness, safe, non-toxic, low-voc water-based coatings will gradually replace the solvent coatings, and have great development prospects.
The preparation of the coating. Choose 150 mm x 70 mm x 0.35 mm galvanized sheet, after passivation coating on coated sticks above water saturated polyester amino coil coatings, and obtained a certain film thickness of coating, quickly in the 270 ℃ high temperature oven bake 60 s (plate temperature 224 ℃), immediately remove cooling, get coating model, various properties of paint film at room temperature test.
The performance tests. According to gb9286-1998, the adhesion method was used in the test. The coating thickness is determined according to GB/t1348-2005. The coating is measured according to GB/t1-88. Pencil hardness based on GB/t6739-1996 According to the ecca-t11.1999 test, the MEK wipes performance. According to the ECCA - T7.1996, the T bending of the film is generally required. According to ecca-t5, impact resistance is determined.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The performance of water-based saturated polyester and amino coil coatings is quite good. The gloss can meet the level of oil saturated polyester resin; Because of the presence of carboxyl group, it is good for various materials, not inferior to solvent saturated polyester resin. The hardness and flexibility of the saturated polyester and amino coil coatings can achieve a good balance.
Wipe MEK resistance is quite good, because the water of carboxyl of the catalytic curing of unsaturated polyester resin, the curing reaction even without additional catalyst can under the lower temperature, so under the condition of the same baking, water saturated polyester - amino crosslinking reaction activity of coil coatings is higher than the solvent, wipe MEK resistance is better. Weather-resistant water saturated polyester - amino coil coating is comparable to solvent.
The effect of solvent on saturated polyester polyester. Cosolvent on water saturated unsaturated polyester not only role to play in balancing, solubility and viscosity, but also to the whole coating system mixing solubility, viscosity, wettability and the rheological properties of film forming process.
With ethylene glycol monobutyl ether (BCS) as an example, the water in the saturated polyester dispersion cosolvent (BCS) dosage, the greater the same solid content the higher the viscosity will be, will also cause the final construction of dilution ratio is increased. The solid content of the saturated polyester should be raised as high as possible, the solid content is too low, while the solid portion of the final coating is too low.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
To this end, we also introduced the solid form of water dispersible saturated polyester resin, customers can adjust the formula is very flexible, you can get a lower VOC coating. The addition of n-butanol to the paint formula can improve the viscosity of the coating and the overall surface tension of the coating will decrease.
The speed of the NBA is much bigger than water, the paint is coated, the NBA is volatilizing rapidly, which can reduce the viscosity of the paint, thereby improving the overall level of the coating.
By using highly active water saturated polyester resin and water-based amino resin, preparation of both environmental protection and energy saving can be high processability and chemical resistance water saturated polyester - amino coil coatings, thus greatly promote the use and development of water-based coatings. With the improvement of environmental protection and health awareness, safe, non-toxic, low-voc water-based coatings will gradually replace the solvent coatings, and have great development prospects.
The preparation of the coating. Choose 150 mm x 70 mm x 0.35 mm galvanized sheet, after passivation coating on coated sticks above water saturated polyester amino coil coatings, and obtained a certain film thickness of coating, quickly in the 270 ℃ high temperature oven bake 60 s (plate temperature 224 ℃), immediately remove cooling, get coating model, various properties of paint film at room temperature test.
The performance tests. According to gb9286-1998, the adhesion method was used in the test. The coating thickness is determined according to GB/t1348-2005. The coating is measured according to GB/t1-88. Pencil hardness based on GB/t6739-1996 According to the ecca-t11.1999 test, the MEK wipes performance. According to the ECCA - T7.1996, the T bending of the film is generally required. According to ecca-t5, impact resistance is determined.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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