News Details
Coating with unsaturated bond crosslinking agent
2017-4-11 22:30:06
Coating with unsaturated bond crosslinking agent, unsaturated bond crosslinking is one of the most ancient application in alkyd resin crosslinking technology, now, through research and innovation to its application in water-based coatings.
Double bond crosslinking process, first is oxidized to form oxygen radicals, and intermolecular crosslinking, drier (cobalt salt) catalytic crosslinking reaction. But the traditional alkyd resin is relying on the fatty acids in the double bond crosslinking, there are serious shortcomings, a crosslinking reaction time is long, will continue to release harmful gases (aldehyde, ketone); Second, with the sustained and crosslinking of paint film, film hair and yellowing.
Improvement in the resin, such as acrylic resin, using vinyl monomers, such as ene propyl methacrylate (AL2MA), can be used in pure c or styrene acrylic resin, especially the deposit in to ALMA copolymerization of styrene. Can also drier (such as cobalt salt) catalytic allyl crosslinking.
Novel resin synthesis method is mainly on the main chain of polymer containing carboxyl by way of the vinyl side base on the main chain of the carboxyl and nitrogen c group, epoxy group, carbon 2 amino methyl acrylate reaction of the unsaturated double bond is introduced into the main chain.
In the solidification process of paint film, through oxidative cross-linking side base double bond, and can be used drier promote curing.
Coating color mixing technique. Need to be careful when including color, generally try small kind, preliminary obtained should be the number of color coating, then according to the results of small sample preparation details. In a small container first will pair of color and color set respectively.
To join the main color (in color usage, tinting strength, small color), dyeing force large dark (or color) slowly and continuously to join, and constantly stirring, observe the change of color. "1", especially when joining tinting strength strong pigment, avoid by all means is too much.
In color, coating and drying after the coating color is slightly different. All kinds of coating color when wet film generally shallow, after coating is dry, color burn. Therefore, if the samples are dry sample, the color paint to dry and then compare color measurement; If samples are wet sample, can sample a drop in the color paint, observe two colors are the same.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Should know in advance in multicolor paint color floating degree as well as the change of the paint, especially amino paint and coating of chlorinated polyvinyl chloride, more attention should be paid.
Deployment of multicolor coating, should choose to allocate each other of the same nature coating, solvent system should also be miscibility, otherwise due to the bad mixing soluble coatings, affect the quality of stratification, precipitation or gel occur, even not be able to use.
Because color often with all sorts of different color, if the match is green, the general use of yellow with yellow and green head with head of blue; With purple, blue with blue with a red head should be adopted for the red; With orange, should be used with yellow head of red and yellow with red.
Attention should be paid to in the process of color, which will add auxiliary materials, such as the color of the drier, curing agent, thinner, etc, so as not to affect the color.
In the deployment of the multicolor paint such as gray, green, due to a variety of mixture of pigment, the density of paint, oil absorption, likely "floating color" "hair flower" wait for a phenomenon, when appropriate, to join the trace of surfactant or flow ping agent, anti floating color agent to solve. Add 0.1% silicone oil to control as usual, foreign company producing all kinds of surface active agent, to distinguish used in what kind of solvent system, add content is in commonly 0.1% ~ 0.1%.
Advantage of the characteristics of paint film is slightly transparent, choose appropriate color can make the color of the paint color more than the original coating is bright, this is according to the principle of natural light reflection absorption, color and color overlay to produce a kind of color, coating project called "color".
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Double bond crosslinking process, first is oxidized to form oxygen radicals, and intermolecular crosslinking, drier (cobalt salt) catalytic crosslinking reaction. But the traditional alkyd resin is relying on the fatty acids in the double bond crosslinking, there are serious shortcomings, a crosslinking reaction time is long, will continue to release harmful gases (aldehyde, ketone); Second, with the sustained and crosslinking of paint film, film hair and yellowing.
Improvement in the resin, such as acrylic resin, using vinyl monomers, such as ene propyl methacrylate (AL2MA), can be used in pure c or styrene acrylic resin, especially the deposit in to ALMA copolymerization of styrene. Can also drier (such as cobalt salt) catalytic allyl crosslinking.
Novel resin synthesis method is mainly on the main chain of polymer containing carboxyl by way of the vinyl side base on the main chain of the carboxyl and nitrogen c group, epoxy group, carbon 2 amino methyl acrylate reaction of the unsaturated double bond is introduced into the main chain.
In the solidification process of paint film, through oxidative cross-linking side base double bond, and can be used drier promote curing.
Coating color mixing technique. Need to be careful when including color, generally try small kind, preliminary obtained should be the number of color coating, then according to the results of small sample preparation details. In a small container first will pair of color and color set respectively.
To join the main color (in color usage, tinting strength, small color), dyeing force large dark (or color) slowly and continuously to join, and constantly stirring, observe the change of color. "1", especially when joining tinting strength strong pigment, avoid by all means is too much.
In color, coating and drying after the coating color is slightly different. All kinds of coating color when wet film generally shallow, after coating is dry, color burn. Therefore, if the samples are dry sample, the color paint to dry and then compare color measurement; If samples are wet sample, can sample a drop in the color paint, observe two colors are the same.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Should know in advance in multicolor paint color floating degree as well as the change of the paint, especially amino paint and coating of chlorinated polyvinyl chloride, more attention should be paid.
Deployment of multicolor coating, should choose to allocate each other of the same nature coating, solvent system should also be miscibility, otherwise due to the bad mixing soluble coatings, affect the quality of stratification, precipitation or gel occur, even not be able to use.
Because color often with all sorts of different color, if the match is green, the general use of yellow with yellow and green head with head of blue; With purple, blue with blue with a red head should be adopted for the red; With orange, should be used with yellow head of red and yellow with red.
Attention should be paid to in the process of color, which will add auxiliary materials, such as the color of the drier, curing agent, thinner, etc, so as not to affect the color.
In the deployment of the multicolor paint such as gray, green, due to a variety of mixture of pigment, the density of paint, oil absorption, likely "floating color" "hair flower" wait for a phenomenon, when appropriate, to join the trace of surfactant or flow ping agent, anti floating color agent to solve. Add 0.1% silicone oil to control as usual, foreign company producing all kinds of surface active agent, to distinguish used in what kind of solvent system, add content is in commonly 0.1% ~ 0.1%.
Advantage of the characteristics of paint film is slightly transparent, choose appropriate color can make the color of the paint color more than the original coating is bright, this is according to the principle of natural light reflection absorption, color and color overlay to produce a kind of color, coating project called "color".
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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