News Details
2 kpu coating crosslinking agent
2017-6-2 16:11:12
2 kpu coating crosslinking agent
2KPU is one of the most common coatings. The specific operation of the method of gels is as follows: 1, 1.1-1.5 g coated in the filter, weighing m0; (2) under 60 ℃ condenser, the solvent of methanol, acetone is 1:1 placed in 5 h. (3) remove the film bag, bake at 105 ℃ for 30 min after weighing the m1; The percolation rate of the coating was (m1 / m0) x 100%, the gel ratio test method evaluated the cross-linking density of the coating.
The method of potassium permanganate titration was applied to the surface of the film coated with potassium permanganate, and after a certain period of time, the color difference of the discoloration was observed. The coating performance test also reflects the high and low levels of the coating. For example, hardness, solvability, good quality and good quality are also indirectly reflected in the degree of membrane crosslinking.
In this paper, in order to quickly compare, use 5 mol/L NaOH titration in coating surface, under 25 ℃ and 70% relative humidity for 24 h, then observe and coating on the surface of the white light.
Test instruments and reagents, DISPERMAT high-speed dispersion machine (VMA - GETZMANN); The gloss and fog shadow instrument, 25 mu m fine plate (byk-gardner); DisperserDAS200 oscillation dispersion instrument (LauGmbH). Acrylic resin, crosslinking agent, antiphotic agent, dispersant, flux, various solvents (industrial grade), dabco-12 (gas chemical) etc.
Increase the amount of crosslinking agent. Combine the varnish, cross-linking agent and diluent, let stand for 5 min after spraying, and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
To adjust the type of crosslinking agent. Change with different crosslinking agent with lacquer, after paint, let stand for 5 min after spraying, and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
Experiment with the length of time after painting. According to varnish, crosslinking agent, diluent mixed ratio of 100:33:50 paint, let stand for different time after spraying, and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
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).
The effect of film thickness on coating properties
According to varnish, crosslinking agent, diluent mixed ratio of 100:33:50 paint, let stand for 5 min, spraying different number, different film thickness control (dry film), and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
The test of the addition of the drier. Fill to join a certain amount of T - 12 drier, match after paint, let stand for 5 min model, spray and bake at 70 ℃ oven 75 min, take out after cooling and drying 60 min.
The effect of crosslinking agent on the alkali resistance of the coating. Too many crosslinking agents may react with water vapor in the air to affect the membrane crosslinking.
The alkali-resistance of the coating can be improved by an excess of the amount of the crosslinking agent, but the resistance of the coating is decreased when the crosslinking agent overdose.
The effect of baking time on the alkali resistance of the coating. Extending the baking time, the crosslinking density of the coating increased and the alkali resistance of the coating was obviously improved. But the baking time is too long, the coating may have a small amount of decomposing in the heat, and the alkalinity is slowly declining. The coating of the coating that is forced to dry is better than that of natural drying.
The effect of different time on the alkali resistance of coating. After the coating is made up, it is sprayed and dried after a different time, and it is alkaline (strengthened to 84h).
Synthesis of room temperature crosslinking aqueous polyurethane resin meet the manufacturing process of water-based coating eligibility, construction work eligibility and quality using eligibility requirements, the coating of high water resistance, quick drying, strong adhesion, non-toxic non-flammable, excellent weather resistance, viscous easy to control, it is a good environmentally friendly water-based paint.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
2KPU is one of the most common coatings. The specific operation of the method of gels is as follows: 1, 1.1-1.5 g coated in the filter, weighing m0; (2) under 60 ℃ condenser, the solvent of methanol, acetone is 1:1 placed in 5 h. (3) remove the film bag, bake at 105 ℃ for 30 min after weighing the m1; The percolation rate of the coating was (m1 / m0) x 100%, the gel ratio test method evaluated the cross-linking density of the coating.
The method of potassium permanganate titration was applied to the surface of the film coated with potassium permanganate, and after a certain period of time, the color difference of the discoloration was observed. The coating performance test also reflects the high and low levels of the coating. For example, hardness, solvability, good quality and good quality are also indirectly reflected in the degree of membrane crosslinking.
In this paper, in order to quickly compare, use 5 mol/L NaOH titration in coating surface, under 25 ℃ and 70% relative humidity for 24 h, then observe and coating on the surface of the white light.
Test instruments and reagents, DISPERMAT high-speed dispersion machine (VMA - GETZMANN); The gloss and fog shadow instrument, 25 mu m fine plate (byk-gardner); DisperserDAS200 oscillation dispersion instrument (LauGmbH). Acrylic resin, crosslinking agent, antiphotic agent, dispersant, flux, various solvents (industrial grade), dabco-12 (gas chemical) etc.
Increase the amount of crosslinking agent. Combine the varnish, cross-linking agent and diluent, let stand for 5 min after spraying, and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
To adjust the type of crosslinking agent. Change with different crosslinking agent with lacquer, after paint, let stand for 5 min after spraying, and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
Experiment with the length of time after painting. According to varnish, crosslinking agent, diluent mixed ratio of 100:33:50 paint, let stand for different time after spraying, and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
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).
The effect of film thickness on coating properties
According to varnish, crosslinking agent, diluent mixed ratio of 100:33:50 paint, let stand for 5 min, spraying different number, different film thickness control (dry film), and bake at 70 ℃ oven 70 min, take out after cooling and drying 60 min.
The test of the addition of the drier. Fill to join a certain amount of T - 12 drier, match after paint, let stand for 5 min model, spray and bake at 70 ℃ oven 75 min, take out after cooling and drying 60 min.
The effect of crosslinking agent on the alkali resistance of the coating. Too many crosslinking agents may react with water vapor in the air to affect the membrane crosslinking.
The alkali-resistance of the coating can be improved by an excess of the amount of the crosslinking agent, but the resistance of the coating is decreased when the crosslinking agent overdose.
The effect of baking time on the alkali resistance of the coating. Extending the baking time, the crosslinking density of the coating increased and the alkali resistance of the coating was obviously improved. But the baking time is too long, the coating may have a small amount of decomposing in the heat, and the alkalinity is slowly declining. The coating of the coating that is forced to dry is better than that of natural drying.
The effect of different time on the alkali resistance of coating. After the coating is made up, it is sprayed and dried after a different time, and it is alkaline (strengthened to 84h).
Synthesis of room temperature crosslinking aqueous polyurethane resin meet the manufacturing process of water-based coating eligibility, construction work eligibility and quality using eligibility requirements, the coating of high water resistance, quick drying, strong adhesion, non-toxic non-flammable, excellent weather resistance, viscous easy to control, it is a good environmentally friendly water-based paint.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian