News Details
Water-based acrylic paint crosslinking agent
2017-6-3 15:42:03
Water-based acrylic paint crosslinking agent
With acrylic monomers as the main monomers, methacrylic acid (MAA), acrylic acid glyceride, SD nitrogen functional monomer as crosslinking monomer, such as core-shell emulsion polymerization technology on preparation of core-shell waterborne acrylic emulsion, then under alkaline conditions in polyamide epichlorohydrin diplomatic agent for crosslinking reaction, cationic branched end group. Nuclear shell composite emulsion polymerization is an important emulsion polymerization new technique.
Monomer B recipe for nuclear monomer, monomer C formula for shell monomer, the glass transition temperature is less than the shell monomer, nuclear monomer synthetic latex particles inside the nucleus and the outer shell of enrichment in the soft hard outside the different components of composite emulsion, endowed with core and shell of different functions, different performance of the composite emulsion polymer.
The inner layer of the shell is softer, ensuring the coating's toughness and adhesion. Outer contain methyl acrylic acid, acrylic acid glyceride, SD nitrogen functional monomer, such as functional monomer, make coating have foreign characteristics, can guarantee the stability of its mixes with foreign league curing agent and longer activation period.
To join the diplomatic agent in the coating polyamide epichlorohydrin make the function crosslinking emulsion coating depth, increase the crosslink density, also is advantageous to the coating and substrate, such as eliminating the ordinary acrylic coating "hot sticky cold short" phenomenon, greatly enhance the coating adhesion, hardness, wear resistance, water resistance and solvent resistance and other properties.
In the chain of acrylate on introducing carboxyl polymer emulsion can be endowed with stability, alkali thickening, and provides the junction, join the crosslinking monomer, crosslinking density can improve the coating to improve the comprehensive performance of the coating. Different units will give different properties to the emulsion.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Synthesis of nuclear shell emulsion. Stirring speed effect on the properties of emulsion in the process of emulsion polymerization, mixing role is an important monomer dispersed into the single bead drip, and beneficial to mass transfer and heat transfer. But too low or too high is not appropriate.
The mixing rate is too low, the emulsion is uneven and the wall of the flask is sticky. But stirring intensity is high, on the one hand can reduce number of latex particles, the latex particle diameter increases and the polymerization reaction rate is reduced, at the same time can make produce gel emulsion, emulsion breaking even; In addition, stirring intensity, mixed with emulsion polymerization system increases, the air in the air is the oxygen free radical reaction inhibitor, therefore, can make the polymerization reaction rate is reduced. Too severe mechanical action also can make the latex particles and increase friction between the water phase, the hydration layer thinning, can make the emulsion to produce gel or demulsification, stability. The optimum mixing speed is 200 ~ 300r/min.
The choice of reaction temperature. The reaction temperature has a large effect on the speed of polymerization and the performance of coating. Generally speaking, as the reaction temperature rises, the reaction speeds up. The reaction temperature is too low, the initiator decomposes slowly, the active free radical is low, the reaction rate is slow, the conversion rate is low, the reaction period is too long.
Reaction temperature is too high, the latex particles Brownian motion, make between latex particle collision and coalescence rate increase, will make the latex particle on the surface of the hydration layer thinning, results in the decrease of the emulsion stability, especially when the reaction temperature to equal to or greater than the cloud point of emulsifiers, emulsifier lost stability, produce demulsification. Appropriate emulsion polymerization temperature is 80 ℃, the reaction is stable.
The mechanism of crosslinking of diplomatic couplets. Crosslinking agent is to have two or more compounds of reactive groups, extremely easy to groups such as hydroxyl and amine, amide, carboxylic crosslinked, form a mesh shape structure, improve its chemical properties. To make the function of water-borne acrylic latex coatings system has better performance, also need to join hydrazide class, n propyl organism or polyamide epichlorohydrin foreign league modifier acrylic resin for effective crosslinking modification at room temperature.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
With acrylic monomers as the main monomers, methacrylic acid (MAA), acrylic acid glyceride, SD nitrogen functional monomer as crosslinking monomer, such as core-shell emulsion polymerization technology on preparation of core-shell waterborne acrylic emulsion, then under alkaline conditions in polyamide epichlorohydrin diplomatic agent for crosslinking reaction, cationic branched end group. Nuclear shell composite emulsion polymerization is an important emulsion polymerization new technique.
Monomer B recipe for nuclear monomer, monomer C formula for shell monomer, the glass transition temperature is less than the shell monomer, nuclear monomer synthetic latex particles inside the nucleus and the outer shell of enrichment in the soft hard outside the different components of composite emulsion, endowed with core and shell of different functions, different performance of the composite emulsion polymer.
The inner layer of the shell is softer, ensuring the coating's toughness and adhesion. Outer contain methyl acrylic acid, acrylic acid glyceride, SD nitrogen functional monomer, such as functional monomer, make coating have foreign characteristics, can guarantee the stability of its mixes with foreign league curing agent and longer activation period.
To join the diplomatic agent in the coating polyamide epichlorohydrin make the function crosslinking emulsion coating depth, increase the crosslink density, also is advantageous to the coating and substrate, such as eliminating the ordinary acrylic coating "hot sticky cold short" phenomenon, greatly enhance the coating adhesion, hardness, wear resistance, water resistance and solvent resistance and other properties.
In the chain of acrylate on introducing carboxyl polymer emulsion can be endowed with stability, alkali thickening, and provides the junction, join the crosslinking monomer, crosslinking density can improve the coating to improve the comprehensive performance of the coating. Different units will give different properties to the emulsion.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Synthesis of nuclear shell emulsion. Stirring speed effect on the properties of emulsion in the process of emulsion polymerization, mixing role is an important monomer dispersed into the single bead drip, and beneficial to mass transfer and heat transfer. But too low or too high is not appropriate.
The mixing rate is too low, the emulsion is uneven and the wall of the flask is sticky. But stirring intensity is high, on the one hand can reduce number of latex particles, the latex particle diameter increases and the polymerization reaction rate is reduced, at the same time can make produce gel emulsion, emulsion breaking even; In addition, stirring intensity, mixed with emulsion polymerization system increases, the air in the air is the oxygen free radical reaction inhibitor, therefore, can make the polymerization reaction rate is reduced. Too severe mechanical action also can make the latex particles and increase friction between the water phase, the hydration layer thinning, can make the emulsion to produce gel or demulsification, stability. The optimum mixing speed is 200 ~ 300r/min.
The choice of reaction temperature. The reaction temperature has a large effect on the speed of polymerization and the performance of coating. Generally speaking, as the reaction temperature rises, the reaction speeds up. The reaction temperature is too low, the initiator decomposes slowly, the active free radical is low, the reaction rate is slow, the conversion rate is low, the reaction period is too long.
Reaction temperature is too high, the latex particles Brownian motion, make between latex particle collision and coalescence rate increase, will make the latex particle on the surface of the hydration layer thinning, results in the decrease of the emulsion stability, especially when the reaction temperature to equal to or greater than the cloud point of emulsifiers, emulsifier lost stability, produce demulsification. Appropriate emulsion polymerization temperature is 80 ℃, the reaction is stable.
The mechanism of crosslinking of diplomatic couplets. Crosslinking agent is to have two or more compounds of reactive groups, extremely easy to groups such as hydroxyl and amine, amide, carboxylic crosslinked, form a mesh shape structure, improve its chemical properties. To make the function of water-borne acrylic latex coatings system has better performance, also need to join hydrazide class, n propyl organism or polyamide epichlorohydrin foreign league modifier acrylic resin for effective crosslinking modification at room temperature.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian