News Details
Polyurethane coating resin crosslinking agent
2017-3-12 22:56:58
Polyurethane coating resin crosslinking agent,In weathering powder coating, polyurethane coating production in the world after polyester powder coatings. Due to its excellent physical and chemical properties, as well as the very good adornment sex, comprehensive and balanced performance, wide application range, is mainly used in outdoor decorative painting, such as bicycles, motorcycles, cars, etc.
In addition, the characteristics of easy to thin layer makes it particularly suitable for the application of metal coating material (PCM). Now in the market of polyurethane powder paint are composed of hydroxyl polyester and closed isocyanate. By the different of closed isocyanate and hydroxyl polyester powder coating its physical and chemical properties are very different.
The purpose of this study is through the test data to find the right the best formula of polyurethane powder paint, in order to achieve the best cost performance, at the same time discusses the various parts and test conditions on the properties of coating.
Got behind in polyurethane powder coating film polyester resin is the main chemical reaction of hydroxyl (OH) with closed reaction between isocyanate base (NCO).
Of polyurethane powder paint coating degradation speed control mainly depends on the hydroxyl polyester main chain decomposition, choosing the appropriate hydroxyl polyester for the chemical resistance of polyurethane powder coating has a crucial influence, in the choose several hydroxyl polyester made a contrast test of various physical and chemical performance, but different manufacturer of hydroxyl polyester polyurethane powder coating made of physical and chemical properties are quite different.
Will be in strict accordance with the reference formulation weighing and mixing raw materials, use SLJ - 30 extruder extrusion (area at 105 ℃, temperature control area control the temperature of 110 ℃), the oven temperature of (200 + 2) ℃, setting standards testing samples, testing standards, in accordance with the recommended national standards, testing in different saturated hydroxy polyester made of polyurethane powder paint coating performance.
Crosslinking agent for polyurethane powder coating has great effect on physical and chemical properties, if choose crosslinking agent and crosslinking reaction resin not well, so the physical and chemical properties of polyurethane powder coating will be greatly affected.
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
By test can select the best resin and crosslinking agent, but by the results of the test, you can see that coating aging resistance performance wasn't up to the best, in order to improve the aging resistance of coating, choosing the right auxiliaries became the optimization formula of the key.
For this choice of polyurethane coating with catalyst, it is a kind of used for to the free flow of lauric acid tin catalyst, the adding amount of coating aging resistance and impact resistance.
As BT - 71, with the increase of adding amount of polyurethane powder paint coating to increase rigidity, will reduce the resistance to impact, at the same time, the gloss of coating will have varying degrees of decline, through test to add quantity in 3 ‰ ~ 3.5 ‰, the coating in light rate above 20% when the aging resistance of 800 h, both positive and negative impact of 50 kg not appear tiny crack.
Polyurethane coating is obtained by the above test may be optimal formula is BT - 71 it is advisable to add quantity 3 ‰ ~ 3.5 ‰.
In the process of test of extrusion, extrusion machine cleaning is very important, it is best to have a special production of polyurethane coating of extrusion machine and grinding machine, extrusion machine and grinding machine of coating if any of the residue, production of polyurethane powder paint will have particles, shrinkage cavity, etc.
As a result of polyurethane powder coating in baking got behind in membrane process, to release the sealants and other small molecule compounds, test sample of coating can't be too thick, otherwise easy to produce the ills such as pinhole, bubble; At the same time, due to the blocking isocyanate deblocking temperature requirements high, determines the low temperature crosslinking polyurethane powder coatings can do about it. Oven temperature is too high or baking time is too long can cause yellow coating, which will influence the gloss of the film.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
In addition, the characteristics of easy to thin layer makes it particularly suitable for the application of metal coating material (PCM). Now in the market of polyurethane powder paint are composed of hydroxyl polyester and closed isocyanate. By the different of closed isocyanate and hydroxyl polyester powder coating its physical and chemical properties are very different.
The purpose of this study is through the test data to find the right the best formula of polyurethane powder paint, in order to achieve the best cost performance, at the same time discusses the various parts and test conditions on the properties of coating.
Got behind in polyurethane powder coating film polyester resin is the main chemical reaction of hydroxyl (OH) with closed reaction between isocyanate base (NCO).
Of polyurethane powder paint coating degradation speed control mainly depends on the hydroxyl polyester main chain decomposition, choosing the appropriate hydroxyl polyester for the chemical resistance of polyurethane powder coating has a crucial influence, in the choose several hydroxyl polyester made a contrast test of various physical and chemical performance, but different manufacturer of hydroxyl polyester polyurethane powder coating made of physical and chemical properties are quite different.
Will be in strict accordance with the reference formulation weighing and mixing raw materials, use SLJ - 30 extruder extrusion (area at 105 ℃, temperature control area control the temperature of 110 ℃), the oven temperature of (200 + 2) ℃, setting standards testing samples, testing standards, in accordance with the recommended national standards, testing in different saturated hydroxy polyester made of polyurethane powder paint coating performance.
Crosslinking agent for polyurethane powder coating has great effect on physical and chemical properties, if choose crosslinking agent and crosslinking reaction resin not well, so the physical and chemical properties of polyurethane powder coating will be greatly affected.
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
By test can select the best resin and crosslinking agent, but by the results of the test, you can see that coating aging resistance performance wasn't up to the best, in order to improve the aging resistance of coating, choosing the right auxiliaries became the optimization formula of the key.
For this choice of polyurethane coating with catalyst, it is a kind of used for to the free flow of lauric acid tin catalyst, the adding amount of coating aging resistance and impact resistance.
As BT - 71, with the increase of adding amount of polyurethane powder paint coating to increase rigidity, will reduce the resistance to impact, at the same time, the gloss of coating will have varying degrees of decline, through test to add quantity in 3 ‰ ~ 3.5 ‰, the coating in light rate above 20% when the aging resistance of 800 h, both positive and negative impact of 50 kg not appear tiny crack.
Polyurethane coating is obtained by the above test may be optimal formula is BT - 71 it is advisable to add quantity 3 ‰ ~ 3.5 ‰.
In the process of test of extrusion, extrusion machine cleaning is very important, it is best to have a special production of polyurethane coating of extrusion machine and grinding machine, extrusion machine and grinding machine of coating if any of the residue, production of polyurethane powder paint will have particles, shrinkage cavity, etc.
As a result of polyurethane powder coating in baking got behind in membrane process, to release the sealants and other small molecule compounds, test sample of coating can't be too thick, otherwise easy to produce the ills such as pinhole, bubble; At the same time, due to the blocking isocyanate deblocking temperature requirements high, determines the low temperature crosslinking polyurethane powder coatings can do about it. Oven temperature is too high or baking time is too long can cause yellow coating, which will influence the gloss of the film.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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