News Details
Water system coating crosslinking agent
2017-6-12 19:51:29
Water system coating crosslinking agent
Similar to oil wood lacquer, the following factors are helpful for the orientation of water-based wood lacquer: 1. Appropriate rheological curves; 3, flow property; 4) thin spray; 5, good dispersion.
Unlike oil system, water system, the biggest difficulty is the lack of special packing orientation additives, such as water system is very difficult to find similar to oily polyamide wax or CAB this has effects of additives on packing orientation, water-based formula workers must therefore filtered more patience of additives on the market, to meet the above 5 factors.
The choice of film agent. It is similar to the solvent and solvent in solvent, and it can be classified according to the role of the film agent in the water system. For water-based paint drying, there is a classic evaluation: solvent coating drying is the temperature leading, humidity interference; Water-based coating is the dominant humidity, temperature interference.
The selection and collocation of the film agent are crucial to the performance of the coating, if the formula is good, it is because of the film agent; And vice versa. But it is extremely complex, especially with a mixture of solvents, to be made from the system, and it is impossible to give an accurate description.
For coating engineer care about most is the practical application effect, many researchers have carried out research, wrote books, articles, and there is even a special software, so now you can at least roughly the qualitative description of these volatile process, and can through effective selection and collocation to solve some practical problems, it has basic enough for coating formula engineer.
In the case of water-based wood paint system, the selection of film additives is based on the following considerations:
Good film ability: it can reduce the amount of film aid, and the formula is more flexible.
Quick-drying: the importance of this to the packing orientation, the importance of early performance;
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Appropriate volatilization gradient: a moderate amount of slow-volatilizing film agent is very helpful for membrane density and preventing shrinkage.
The main ingredients of the present mainstream are propylene glycol methyl ether (PM), ethylene glycol butyl ether (BCS), diethylene glycol ether (DEE) and diethylene glycol butyl ether (DEB).
In order to achieve faster drying speed, it is even possible to choose ethanol, acetone, benzyl methanol, and other rapidly volatilizing solvents.
In the ethanol solvent, the choice of the PM - mainly because of its rapid evaporation ability, only as a cosolvent, BCS, DEE and DEB is aimed to establish a suitable volatile gradient, glycol ethers solvent at the same time also has under different concentrations of surface tension can keep unchanged basic ability, thus help to get a better operability, and has certain coupling, easy packing wetting dispersing. In addition, there is also literature showing that in a relatively long dry time, the same volatilizing velocity, the hydrophilic film agent has a lower residual in the system.
There are certain limitations to the selection of such a membrane auxiliaries. Main problem is that in order to guarantee a membranous, medium and slow evaporation rate of film forming additives usage slants big, eventually lead to film reflect slower performance, this also is at present a lot of customers are faced with the problem. Therefore began to look for new film-forming agent, can quickly evaporate from the system, and has a good help into membranous, then quickly locked the EEP, n - pentyl Propionate, dipropylene glycol dimethyl ether, and has made the preliminary test of EEP.
Explanation: dry environment: about 15 degrees Celsius; Humidity: before
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Similar to oil wood lacquer, the following factors are helpful for the orientation of water-based wood lacquer: 1. Appropriate rheological curves; 3, flow property; 4) thin spray; 5, good dispersion.
Unlike oil system, water system, the biggest difficulty is the lack of special packing orientation additives, such as water system is very difficult to find similar to oily polyamide wax or CAB this has effects of additives on packing orientation, water-based formula workers must therefore filtered more patience of additives on the market, to meet the above 5 factors.
The choice of film agent. It is similar to the solvent and solvent in solvent, and it can be classified according to the role of the film agent in the water system. For water-based paint drying, there is a classic evaluation: solvent coating drying is the temperature leading, humidity interference; Water-based coating is the dominant humidity, temperature interference.
The selection and collocation of the film agent are crucial to the performance of the coating, if the formula is good, it is because of the film agent; And vice versa. But it is extremely complex, especially with a mixture of solvents, to be made from the system, and it is impossible to give an accurate description.
For coating engineer care about most is the practical application effect, many researchers have carried out research, wrote books, articles, and there is even a special software, so now you can at least roughly the qualitative description of these volatile process, and can through effective selection and collocation to solve some practical problems, it has basic enough for coating formula engineer.
In the case of water-based wood paint system, the selection of film additives is based on the following considerations:
Good film ability: it can reduce the amount of film aid, and the formula is more flexible.
Quick-drying: the importance of this to the packing orientation, the importance of early performance;
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Appropriate volatilization gradient: a moderate amount of slow-volatilizing film agent is very helpful for membrane density and preventing shrinkage.
The main ingredients of the present mainstream are propylene glycol methyl ether (PM), ethylene glycol butyl ether (BCS), diethylene glycol ether (DEE) and diethylene glycol butyl ether (DEB).
In order to achieve faster drying speed, it is even possible to choose ethanol, acetone, benzyl methanol, and other rapidly volatilizing solvents.
In the ethanol solvent, the choice of the PM - mainly because of its rapid evaporation ability, only as a cosolvent, BCS, DEE and DEB is aimed to establish a suitable volatile gradient, glycol ethers solvent at the same time also has under different concentrations of surface tension can keep unchanged basic ability, thus help to get a better operability, and has certain coupling, easy packing wetting dispersing. In addition, there is also literature showing that in a relatively long dry time, the same volatilizing velocity, the hydrophilic film agent has a lower residual in the system.
There are certain limitations to the selection of such a membrane auxiliaries. Main problem is that in order to guarantee a membranous, medium and slow evaporation rate of film forming additives usage slants big, eventually lead to film reflect slower performance, this also is at present a lot of customers are faced with the problem. Therefore began to look for new film-forming agent, can quickly evaporate from the system, and has a good help into membranous, then quickly locked the EEP, n - pentyl Propionate, dipropylene glycol dimethyl ether, and has made the preliminary test of EEP.
Explanation: dry environment: about 15 degrees Celsius; Humidity: before
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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