News Details
Composition of paint crosslinking agent
2017-5-31 17:14:54
Composition of paint crosslinking agent:When active monomers containing methyl acrylic acid copolymer on the surface of the carboxyl increases, can not only improve the hydrophilicity of copolymer, and to increase the electronegative, emulsion stability, also can increase the attraction between the molecules of the fiber, improve the color fastness. This experiment adopts the active monomers G and methylacrylic acid as mixed crosslinking agent, the dosage of crosslinking agent was higher than 7.0%, the dosage increase, adhesive fastness changed little, and the stability is poor. Therefore, choose crosslinking agent is 6.0% ~ 7.0% (quality of comonomer) is appropriate.
The performance of the individual monomer can be made up for short supply, optimized for the match, and can obtain the paint printing with excellent performance. This experiment with butyl acrylate and isooctyl acrylate as soft monomer, styrene, methyl methacrylate and acrylonitrile as hard monomer, active monomers G and methylacrylic acid as crosslinking monomer test, determine the best ratio for: soft monomer 65% ~ 73%, hard monomer 27% ~ 35%.
The varieties and dosage of emulsifier directly affect the stability of the emulsion and the polymerization reaction. Because of the acrylate emulsion polymerization in O/W emulsion, so the requirement of emulsifier close water oil balance (HLB) value in 10 ~ 18, with nonionic emulsifier consider phase transformation temperature PIT, O/W emulsion PIT is the most appropriate nonionic emulsifier should be higher than the emulsion preserved temperature 20 ~ 60 ℃, the emulsion that has the most stable when stored.
Through the test, using nonionic emulsifier alone or anionic emulsifier, emulsion all cannot achieve good emulsification effect. The above two kinds of compound emulsifier used, through the synergy of both can make the polymer emulsion with good stability. [8] filtered, sodium dodecyl sulfate and OS - 15 compound emulsifier consisting of the best effect.
Too little dosage of emulsifier, emulsion stability, monomer polymerization was prone to storm gather and condense (no critical polymer produced in the process of test, but after the completion of the reaction with 120 mesh filter bag filter can get critical polymer); Excessive dosage, the stability of emulsion is good, but its application performance is decreased. Emulsifier optimal dosage is 3.5% ~ 4.5% (to copolymer quality).
Add moisturizer in adhesive emulsion delay the water loss of adhesive film, is the purpose of preventing the blocked in printing network, embedded cylinder. [10] moisturizing factor besides moisturizing effect, also can increase the pattern printing clarity. This test at the same time using urea and moisturizing factor, glycerin dosage is too little, cannot achieve good moisturizing effect; The best dose of moisturizers is 0.3 to 0.5 percent (for copolymer quality).
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Environmental protection polyacrylic ester high performance since the application of crosslinking pigment printing binder FL performance good. Best ratio of monomer to synthesis: soft monomer 65% ~ 73%, hard monomer 27% ~ 35%; The best use of emulsifiers is 3.5 to 4.5 percent. The best dose of crosslinking agent was 6.0% ~ 7.0%. The best use of moisturizers is between 0.3 and 0.5 percent.
Functional unit AA is affected by the method of joining. Add a small amount of in the emulsion polymerization formula containing carboxyl, hydroxyl, amino and unsaturated monomers, epoxy group and other functional groups can enhance the interaction between the copolymer molecular chain, even slight crosslinking reaction to generate a certain degree of network structure, thus improve the cohesion strength and mechanical properties of paint film, increase the adhesion between coating and substrate. By adding AA to improve the stability and bonding of the emulsion, determine AA dosage as 2%, and examine the effect of the method on emulsion performance.
In CPAE7, all other conditions are similar to CPAE3 except for AA, which is full of monomer, but the membrane performance of the emulsion is poor, the MFT is higher than the CPAE3, and the performance of the heat resistance is decreased. However, when the AA is fully integrated with shell monomer, the MFT is lower and the viscosity of the emulsion is greater, so the addition of AA can affect the emulsion performance greatly.
This is because the AA for hydrophilic monomer, polymerization reaction in aqueous phase, the join in a different way, carboxyl functional groups in the distribution of latex particles between the inner and outer will change too.
AA as shell monomer and join in and way, carboxyl functional groups will be more evenly distributed in exterior surface layer of latex particles, improve the latex particle surface polarity, curing film increased when the latex particle interactions that make MFT is reduced; The distribution of the carboxylic group on the surface of the emulsion, the chemical crosslinking reaction between ADH and ketocarbonyl group has also been promoted, and the resistance to heat and pressure has improved.
Using core-shell emulsion polymerization technology, the introduction of DAAM and ADH in polyacrylate emulsion, not only reduces the film-forming temperature of latex, and significantly improved the resistance to high temperature of latex paint sticky back, DAAM with AA to join has important influence on the performance of the emulsion. A suitable formula and process for: m (MMA) : m (St) : m (BA) : m (AA) : m (DAAM) = 34:36:28:2:3, DAAM with AA more by shell monomer to join as well.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The performance of the individual monomer can be made up for short supply, optimized for the match, and can obtain the paint printing with excellent performance. This experiment with butyl acrylate and isooctyl acrylate as soft monomer, styrene, methyl methacrylate and acrylonitrile as hard monomer, active monomers G and methylacrylic acid as crosslinking monomer test, determine the best ratio for: soft monomer 65% ~ 73%, hard monomer 27% ~ 35%.
The varieties and dosage of emulsifier directly affect the stability of the emulsion and the polymerization reaction. Because of the acrylate emulsion polymerization in O/W emulsion, so the requirement of emulsifier close water oil balance (HLB) value in 10 ~ 18, with nonionic emulsifier consider phase transformation temperature PIT, O/W emulsion PIT is the most appropriate nonionic emulsifier should be higher than the emulsion preserved temperature 20 ~ 60 ℃, the emulsion that has the most stable when stored.
Through the test, using nonionic emulsifier alone or anionic emulsifier, emulsion all cannot achieve good emulsification effect. The above two kinds of compound emulsifier used, through the synergy of both can make the polymer emulsion with good stability. [8] filtered, sodium dodecyl sulfate and OS - 15 compound emulsifier consisting of the best effect.
Too little dosage of emulsifier, emulsion stability, monomer polymerization was prone to storm gather and condense (no critical polymer produced in the process of test, but after the completion of the reaction with 120 mesh filter bag filter can get critical polymer); Excessive dosage, the stability of emulsion is good, but its application performance is decreased. Emulsifier optimal dosage is 3.5% ~ 4.5% (to copolymer quality).
Add moisturizer in adhesive emulsion delay the water loss of adhesive film, is the purpose of preventing the blocked in printing network, embedded cylinder. [10] moisturizing factor besides moisturizing effect, also can increase the pattern printing clarity. This test at the same time using urea and moisturizing factor, glycerin dosage is too little, cannot achieve good moisturizing effect; The best dose of moisturizers is 0.3 to 0.5 percent (for copolymer quality).
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Environmental protection polyacrylic ester high performance since the application of crosslinking pigment printing binder FL performance good. Best ratio of monomer to synthesis: soft monomer 65% ~ 73%, hard monomer 27% ~ 35%; The best use of emulsifiers is 3.5 to 4.5 percent. The best dose of crosslinking agent was 6.0% ~ 7.0%. The best use of moisturizers is between 0.3 and 0.5 percent.
Functional unit AA is affected by the method of joining. Add a small amount of in the emulsion polymerization formula containing carboxyl, hydroxyl, amino and unsaturated monomers, epoxy group and other functional groups can enhance the interaction between the copolymer molecular chain, even slight crosslinking reaction to generate a certain degree of network structure, thus improve the cohesion strength and mechanical properties of paint film, increase the adhesion between coating and substrate. By adding AA to improve the stability and bonding of the emulsion, determine AA dosage as 2%, and examine the effect of the method on emulsion performance.
In CPAE7, all other conditions are similar to CPAE3 except for AA, which is full of monomer, but the membrane performance of the emulsion is poor, the MFT is higher than the CPAE3, and the performance of the heat resistance is decreased. However, when the AA is fully integrated with shell monomer, the MFT is lower and the viscosity of the emulsion is greater, so the addition of AA can affect the emulsion performance greatly.
This is because the AA for hydrophilic monomer, polymerization reaction in aqueous phase, the join in a different way, carboxyl functional groups in the distribution of latex particles between the inner and outer will change too.
AA as shell monomer and join in and way, carboxyl functional groups will be more evenly distributed in exterior surface layer of latex particles, improve the latex particle surface polarity, curing film increased when the latex particle interactions that make MFT is reduced; The distribution of the carboxylic group on the surface of the emulsion, the chemical crosslinking reaction between ADH and ketocarbonyl group has also been promoted, and the resistance to heat and pressure has improved.
Using core-shell emulsion polymerization technology, the introduction of DAAM and ADH in polyacrylate emulsion, not only reduces the film-forming temperature of latex, and significantly improved the resistance to high temperature of latex paint sticky back, DAAM with AA to join has important influence on the performance of the emulsion. A suitable formula and process for: m (MMA) : m (St) : m (BA) : m (AA) : m (DAAM) = 34:36:28:2:3, DAAM with AA more by shell monomer to join as well.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian