News Details
Low toxicity, non-toxic paint crosslinking agent
2017-4-6 11:16:28
Low toxicity, non-toxic paint crosslinking agent,Modern people not only focus on crosslinking agent in the toxicity and pollution of the environment problems in the process of the production and use, and attaches great importance to the environmental pollution of the waste. Junior polyene polyamine, aromatic amine can use non-toxic or low toxic modified amine replaced.
Be coated on the surface of the air flow is another important influence factors of solvent evaporation rate. The specific construction conditions, solvents in coatings and must be selected. If use air spraying, solvent volatilization significantly faster than using airless spraying. In actual use, rarely with a single solvent for the preparation of coatings.
In order to better control of solvent volatilization rate, improve the ability to dissolve and balance on cost, with mixed solvent system. When using mixed solvent system, different solvents evaporate into the atmosphere ratio is not the same as the original solvent composition, with the volatile solvent, stay solvent composition in a constantly changing.
This change had a great influence on the performance of the coating, such as high dissolving capacity of polymer components (active solvent) relatively thinner, such as volatile solvent too fast may cause eventually dissolve ability is insufficient, make some coating pathological such as shrinkage, pinhole, white wait for a phenomenon.
Solvent for the polymer dissolution ability and the viscosity of the solvent itself had a great influence on coating viscosity finally. In general, the solvent for the stronger the solvency of the resin, resin solution which is formed by the lower viscosity.
In the coating system, filling of solvent viscosity to be higher than active solvent. Because in active solvent, resin molecules in solution can be at full stretch, although the intermolecular winding is more, but the molecular chain has good flexibility; In filling solvent, polymer chain flexibility is bad, not easy solution tangles, show the viscosity increased significantly. In addition, the coating resin is more polar, groups such as hydroxyl containing can form hydrogen bond or amino, etc. The presence of these groups make the association, each other between resin molecules tend to increase the viscosity of the solution. In order to reduce the tendency, and adding hydrogen bonding accept type solvents such as acetone, ether and alcohol system viscosity can be reduced effectively. Add pigment and filler and considerably increase the viscosity of the coating.
When compound coating, construction requirements, in order to satisfy the viscosity products should be comprehensive consideration of solvent viscosity and solvency, in order to achieve the best balance.
Not all solvent soluble polymer: we will have the ability to dissolve the organic polymer solvent called active solvent (solvent medium and strong hydrogen bonding), and the polymer does not have or only weak ability to dissolve organic solvents we called filled with solvent.
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.
Active solvent characteristics: most with polar groups, generally higher prices. Mainly has the following categories:
1. Ketone, acetone, butanone, methyl ketone and methyl isobutyl ketone, cyclohexanone, and so on.
2. Ester, ethyl acetate, butyl acetate, isopropyl acetate, and so on
3. Alcohol, ethanol, n-butyl alcohol, isopropyl alcohol, etc
4. With more than two functional groups of solvents: ethylene glycol butyl ether (BCs) and propylene glycol methyl ether acetate (PMA), etc.
Alcohols, ketones, esters and alcohol ether these four types of active solvent are often referred to as oxygen containing solvents. The so-called oxygenated solvent is molecular oxygen is contained in the solvent. They provide a wide range of solvency and volatile, a lot of resin can not soluble in hydrocarbon solvents, but soluble in oxygenated solvent.
Alcohol solvent: because alcohol with hydroxyl, highly strong polarity and hydrogen bonding. Nonpolar hydrocarbon chain and the relationship between the hydroxyl decided the solvent of alcohol. Lower alcohol on strong polarity resin such as alkyd resin, urea formaldehyde resin, nitrocellulose, etc. Have strong solvency. Alcohol resin of strong polarity of solvent increased with the increase of hydrocarbon chain length decreased, so the higher alcohols is not like nitrocellulose resin polarity solvent, but higher alcohol dissolve performance is moderate, very suitable solvent used as surface coating, because it will not bite bottom occur softening bottom paint.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Be coated on the surface of the air flow is another important influence factors of solvent evaporation rate. The specific construction conditions, solvents in coatings and must be selected. If use air spraying, solvent volatilization significantly faster than using airless spraying. In actual use, rarely with a single solvent for the preparation of coatings.
In order to better control of solvent volatilization rate, improve the ability to dissolve and balance on cost, with mixed solvent system. When using mixed solvent system, different solvents evaporate into the atmosphere ratio is not the same as the original solvent composition, with the volatile solvent, stay solvent composition in a constantly changing.
This change had a great influence on the performance of the coating, such as high dissolving capacity of polymer components (active solvent) relatively thinner, such as volatile solvent too fast may cause eventually dissolve ability is insufficient, make some coating pathological such as shrinkage, pinhole, white wait for a phenomenon.
Solvent for the polymer dissolution ability and the viscosity of the solvent itself had a great influence on coating viscosity finally. In general, the solvent for the stronger the solvency of the resin, resin solution which is formed by the lower viscosity.
In the coating system, filling of solvent viscosity to be higher than active solvent. Because in active solvent, resin molecules in solution can be at full stretch, although the intermolecular winding is more, but the molecular chain has good flexibility; In filling solvent, polymer chain flexibility is bad, not easy solution tangles, show the viscosity increased significantly. In addition, the coating resin is more polar, groups such as hydroxyl containing can form hydrogen bond or amino, etc. The presence of these groups make the association, each other between resin molecules tend to increase the viscosity of the solution. In order to reduce the tendency, and adding hydrogen bonding accept type solvents such as acetone, ether and alcohol system viscosity can be reduced effectively. Add pigment and filler and considerably increase the viscosity of the coating.
When compound coating, construction requirements, in order to satisfy the viscosity products should be comprehensive consideration of solvent viscosity and solvency, in order to achieve the best balance.
Not all solvent soluble polymer: we will have the ability to dissolve the organic polymer solvent called active solvent (solvent medium and strong hydrogen bonding), and the polymer does not have or only weak ability to dissolve organic solvents we called filled with solvent.
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.
Active solvent characteristics: most with polar groups, generally higher prices. Mainly has the following categories:
1. Ketone, acetone, butanone, methyl ketone and methyl isobutyl ketone, cyclohexanone, and so on.
2. Ester, ethyl acetate, butyl acetate, isopropyl acetate, and so on
3. Alcohol, ethanol, n-butyl alcohol, isopropyl alcohol, etc
4. With more than two functional groups of solvents: ethylene glycol butyl ether (BCs) and propylene glycol methyl ether acetate (PMA), etc.
Alcohols, ketones, esters and alcohol ether these four types of active solvent are often referred to as oxygen containing solvents. The so-called oxygenated solvent is molecular oxygen is contained in the solvent. They provide a wide range of solvency and volatile, a lot of resin can not soluble in hydrocarbon solvents, but soluble in oxygenated solvent.
Alcohol solvent: because alcohol with hydroxyl, highly strong polarity and hydrogen bonding. Nonpolar hydrocarbon chain and the relationship between the hydroxyl decided the solvent of alcohol. Lower alcohol on strong polarity resin such as alkyd resin, urea formaldehyde resin, nitrocellulose, etc. Have strong solvency. Alcohol resin of strong polarity of solvent increased with the increase of hydrocarbon chain length decreased, so the higher alcohols is not like nitrocellulose resin polarity solvent, but higher alcohol dissolve performance is moderate, very suitable solvent used as surface coating, because it will not bite bottom occur softening bottom 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