News Details
Room temperature paint crosslinking agent
2017-5-29 14:52:31
Room temperature paint crosslinking agent
TEM analysis of emulsion. The inside of the particle is white, and the edge of the particle is slightly darker, the shape of the particle is nearsighted and has a distinct double structure. Particles are irregular ellipsoid, particle sizes are uneven, and the surface of the particle is not smooth, and there is no visible double layer structure.
Some of the particles are linked together because of the slight cross-linking of the emulsion after ADH. Proved at the same time, through seed emulsion polymerization and the DAAM core-shell structure in the shell and add the aggregation method can effectively increase DAAM content on the surface of the colloidal particles, and utilization, improve the crosslinking density of the film, the emulsion has better comprehensive performance.
By seed emulsion polymerization, the core-shell structure can be obtained with a lively ketone group of hardcore soft shell structure acrylate emulsion, using the reaction of the keto group and hydrazine group, has been further room temperature crosslinking latex film.
Results show that when the compound emulsifier dosage of monomer mass fraction of 2% ~ 2.8%, and m (CO - 630) : m (CO - 436) : m (SDS) = (1 ~ 1.5), (0.8 ~ 1), (0.2 ~ 0.3), 1.5% ~ 2% of the amount of monomer DAAM quality, m (ADH) : m (DAAM) = 0.8 ~ 1, latex solid content up to 49.27%, the monomer conversion to a maximum of 99.35%, film hardness of 2 h, film bibulous rate is only 7.65% ~ 8.60%.
Increase the crosslinking temperature can significantly increase the reaction rate of hydrazide crosslinking, and only a relatively short time at high temperature can achieve a higher degree of crosslinking (> 90%), while at room temperature at least need crosslinking 3 d can achieve ideal performance.
The FTIR test showed that ketocarbonyl and acylhydryl group were associated with the formation of the hydrazone; The DSC curve indicates that the polymer emulsion has two distinct glass transition temperatures; The emulsion particle size and TEM analysis show that the reaction of the shell monomer occurs at the core layer of the emulsion, and the emulsion has a double shell structure. The addition of DAAM in the shell can effectively increase the content and utilization of DAAM on the surface of the gel, and improve the system crosslinking degree.
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.
Higher standard combination test. Optimization of emulsion condensation rate is low, high conversion rate, the viscosity is moderate, calcium ion stability, film-forming 7 d after determination of latex coating with low crosslinking degree, and as a membrane after 35 d, crosslinking degree increase obviously, this is related to the film-forming mechanism of emulsion. Due to the high molecular weight of the polymer, the length of the molecular chain and the membrane of the membrane are slow, and the extension of time can help the crosslinking degree of the high emulsion coating.
Superior combination emulsion performance. The tensile strength and elongation rate are two important performance indexes of waterproof coating. The self-crosslinking flexible emulsion, which was optimized by orthogonal test, and a domestic enterprise with acrylic emulsion, were prepared for waterproof coating, and the performance was determined.
Home-made emulsion preparation of acrylic elastic waterproof coating of tensile strength and elongation at break are more than the national standard, at the same time higher than commercial preparation of acrylic emulsion waterproof coating, coating film after the bibulous rate of close to commercial acrylic emulsion preparation of waterproof coating.
The addition of NMA can improve the stability, viscosity, and crosslinking of calcium ions of the self-crosslinked acrylic elastic emulsion.
Orthogonal test showed that when the dosage of the APS, composite emulsifier and NMA monomer quality of 0.7%, 3% and 0.7% respectively, the polymerization temperature is 75 ℃, the condensing rate can be obtained, high conversion rate, low viscosity and moderate crosslinking degree of the crosslinking acrylic elastic emulsion.
To optimize the experimental conditions are self crosslinking emulsion preparation of elastic waterproof coating film bibulous rate is low, the tensile strength and elongation at break, good performance, more than the national standard and commercially available product performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
TEM analysis of emulsion. The inside of the particle is white, and the edge of the particle is slightly darker, the shape of the particle is nearsighted and has a distinct double structure. Particles are irregular ellipsoid, particle sizes are uneven, and the surface of the particle is not smooth, and there is no visible double layer structure.
Some of the particles are linked together because of the slight cross-linking of the emulsion after ADH. Proved at the same time, through seed emulsion polymerization and the DAAM core-shell structure in the shell and add the aggregation method can effectively increase DAAM content on the surface of the colloidal particles, and utilization, improve the crosslinking density of the film, the emulsion has better comprehensive performance.
By seed emulsion polymerization, the core-shell structure can be obtained with a lively ketone group of hardcore soft shell structure acrylate emulsion, using the reaction of the keto group and hydrazine group, has been further room temperature crosslinking latex film.
Results show that when the compound emulsifier dosage of monomer mass fraction of 2% ~ 2.8%, and m (CO - 630) : m (CO - 436) : m (SDS) = (1 ~ 1.5), (0.8 ~ 1), (0.2 ~ 0.3), 1.5% ~ 2% of the amount of monomer DAAM quality, m (ADH) : m (DAAM) = 0.8 ~ 1, latex solid content up to 49.27%, the monomer conversion to a maximum of 99.35%, film hardness of 2 h, film bibulous rate is only 7.65% ~ 8.60%.
Increase the crosslinking temperature can significantly increase the reaction rate of hydrazide crosslinking, and only a relatively short time at high temperature can achieve a higher degree of crosslinking (> 90%), while at room temperature at least need crosslinking 3 d can achieve ideal performance.
The FTIR test showed that ketocarbonyl and acylhydryl group were associated with the formation of the hydrazone; The DSC curve indicates that the polymer emulsion has two distinct glass transition temperatures; The emulsion particle size and TEM analysis show that the reaction of the shell monomer occurs at the core layer of the emulsion, and the emulsion has a double shell structure. The addition of DAAM in the shell can effectively increase the content and utilization of DAAM on the surface of the gel, and improve the system crosslinking degree.
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.
Higher standard combination test. Optimization of emulsion condensation rate is low, high conversion rate, the viscosity is moderate, calcium ion stability, film-forming 7 d after determination of latex coating with low crosslinking degree, and as a membrane after 35 d, crosslinking degree increase obviously, this is related to the film-forming mechanism of emulsion. Due to the high molecular weight of the polymer, the length of the molecular chain and the membrane of the membrane are slow, and the extension of time can help the crosslinking degree of the high emulsion coating.
Superior combination emulsion performance. The tensile strength and elongation rate are two important performance indexes of waterproof coating. The self-crosslinking flexible emulsion, which was optimized by orthogonal test, and a domestic enterprise with acrylic emulsion, were prepared for waterproof coating, and the performance was determined.
Home-made emulsion preparation of acrylic elastic waterproof coating of tensile strength and elongation at break are more than the national standard, at the same time higher than commercial preparation of acrylic emulsion waterproof coating, coating film after the bibulous rate of close to commercial acrylic emulsion preparation of waterproof coating.
The addition of NMA can improve the stability, viscosity, and crosslinking of calcium ions of the self-crosslinked acrylic elastic emulsion.
Orthogonal test showed that when the dosage of the APS, composite emulsifier and NMA monomer quality of 0.7%, 3% and 0.7% respectively, the polymerization temperature is 75 ℃, the condensing rate can be obtained, high conversion rate, low viscosity and moderate crosslinking degree of the crosslinking acrylic elastic emulsion.
To optimize the experimental conditions are self crosslinking emulsion preparation of elastic waterproof coating film bibulous rate is low, the tensile strength and elongation at break, good performance, more than the national standard and commercially available product performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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