News Details
Measures to improve coating crosslinking agent
2017-5-8 15:43:00
Measures to improve coating crosslinking agent.The powder produced by beta-haa is susceptible to yellow change in the TGIC system, which is caused by two factors: the first is caused by the import of the deodorant benzoa; The second is the failure of the common resins to adapt to the beta-haa system. For the first case we can adopt benzoin and other additives used to overcome or reduce, can also be used to receive beta HAA with special functions.
For the second case, we must choose the suitable resin to match, in fact, now there are many designed for beta HAA development of resin to choose from, such as UCB 7617763 0, DSM P865, p838, excalibur, 5122, 5101, etc., the benefits of using these special resin is yellow degeneration can be greatly reduced.
Beta HAA energy-efficient and crosslinking agent, can satisfy 180 ℃ under the condition of normal/crosslinking requirements of 15 min, so reduce the baking temperature can be greatly reduced in the process of application of yellow degeneration caused by baking.
Antioxidants are also one way to reduce the yellow degeneration of beta-haa in the baking process, and the right choice or use of antioxidants can effectively reduce yellow degeneration. The variety and dosage of the antioxidant machines will have an impact on the final performance.
Hindered phenol and phosphite antioxidants or some antioxidants have some widely used new, sometimes will be some different types of antioxidant effect after combination would be better.
Degassing in the crosslinking process. Beta HAA there is water in the process of crosslinking molecules escape, so easily reminiscent of surface will produce the discontinuous layer of porous coating and corrosion resistance of coating produce bigger effect.
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
Water molecules escape from the biggest problem is that the coating surface has a lot of pinhole, which affect the appearance and to cause a decline in water resistance and chemical resistance, therefore how to increase the degassing effect of water or low molecular volatiles escape becomes extremely important. Common solution is to join a special compounds can change the surface tension can also produce sublimation make it easier for small molecules escape, benzoin is one of the most commonly used.
The introduction of benzoin can obviously eliminate the smoothness of the coating on the surface of the coating. In the process of a large number of water molecules escape inevitably need to add a lot of benzoin to solve, but unfortunately the benzoin import coating is very easy to cause yellowing, which brings great inconvenience to the production of light color powder. See section 3.1 of this handout on non-yellow degasifier.
The effect of extrusion temperature on beta-haa. Beta HAA is one who has a polar compounds, uneven homogenization is easy to produce surface tension is poor, so based on beta HAA powder is easy to produce pinhole or fog.
Beta - HAA is harder and pigment and pigment dispersed, so good dispersion and appropriate extrusion effect on the final surface larger impact performance and chemical resistance. Too low an extrude temperature is not appropriate, too high temperature may result in partial predelivery. So according to the specific conditions and environment evaluation, generally between 115 ~ 115 ℃ is suitable, appropriate surface defects can be greatly reduced by the extrusion temperature also.
All types of polyethylene additives make the powder coating reapply when adding up to 0.3 per cent (as per the total amount of powder). In addition, because the surface of lacquer film is difficult to wet, can also have better protection light sex, and can improve the anti-fouling sex of lacquer membrane and resistance to chemical performance. They are also an important part of the anti-graffiti coating, although the resin and crosslinking density play a very important role.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
For the second case, we must choose the suitable resin to match, in fact, now there are many designed for beta HAA development of resin to choose from, such as UCB 7617763 0, DSM P865, p838, excalibur, 5122, 5101, etc., the benefits of using these special resin is yellow degeneration can be greatly reduced.
Beta HAA energy-efficient and crosslinking agent, can satisfy 180 ℃ under the condition of normal/crosslinking requirements of 15 min, so reduce the baking temperature can be greatly reduced in the process of application of yellow degeneration caused by baking.
Antioxidants are also one way to reduce the yellow degeneration of beta-haa in the baking process, and the right choice or use of antioxidants can effectively reduce yellow degeneration. The variety and dosage of the antioxidant machines will have an impact on the final performance.
Hindered phenol and phosphite antioxidants or some antioxidants have some widely used new, sometimes will be some different types of antioxidant effect after combination would be better.
Degassing in the crosslinking process. Beta HAA there is water in the process of crosslinking molecules escape, so easily reminiscent of surface will produce the discontinuous layer of porous coating and corrosion resistance of coating produce bigger effect.
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
Water molecules escape from the biggest problem is that the coating surface has a lot of pinhole, which affect the appearance and to cause a decline in water resistance and chemical resistance, therefore how to increase the degassing effect of water or low molecular volatiles escape becomes extremely important. Common solution is to join a special compounds can change the surface tension can also produce sublimation make it easier for small molecules escape, benzoin is one of the most commonly used.
The introduction of benzoin can obviously eliminate the smoothness of the coating on the surface of the coating. In the process of a large number of water molecules escape inevitably need to add a lot of benzoin to solve, but unfortunately the benzoin import coating is very easy to cause yellowing, which brings great inconvenience to the production of light color powder. See section 3.1 of this handout on non-yellow degasifier.
The effect of extrusion temperature on beta-haa. Beta HAA is one who has a polar compounds, uneven homogenization is easy to produce surface tension is poor, so based on beta HAA powder is easy to produce pinhole or fog.
Beta - HAA is harder and pigment and pigment dispersed, so good dispersion and appropriate extrusion effect on the final surface larger impact performance and chemical resistance. Too low an extrude temperature is not appropriate, too high temperature may result in partial predelivery. So according to the specific conditions and environment evaluation, generally between 115 ~ 115 ℃ is suitable, appropriate surface defects can be greatly reduced by the extrusion temperature also.
All types of polyethylene additives make the powder coating reapply when adding up to 0.3 per cent (as per the total amount of powder). In addition, because the surface of lacquer film is difficult to wet, can also have better protection light sex, and can improve the anti-fouling sex of lacquer membrane and resistance to chemical performance. They are also an important part of the anti-graffiti coating, although the resin and crosslinking density play a very important role.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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