News Details
Water-based acrylic resin coating crosslinking agent
2017-6-1 11:03:50
Water-based acrylic resin coating crosslinking agent
With the increasing consciousness of the human environment, the development of the environment-friendly coating has become the main direction of the development of the coating industry.
From the perspective of development of water-based acrylic resin coating is water-based paint in the fastest growing, most varieties of environmentally friendly coatings, its color shallow, light color, weather resistance, corrosion resistance, etc. However, the normal acrylic emulsion is not good in water, and it is not good. Therefore people mainly use organic silicon, organic fluorine, polyurethane, etc. [6-8] to be modified, so as to improve the water resistance of latex film contamination resistance, weather resistance, etc.
The acetyl methacrylate (AAEM) is a methacrylate monomer that can be used to synthesize acrylic latex for low-voc industry and building coatings. The AAEM improves the elasticity and toughness of the coating, reducing the glass transition temperature. At the same time, the coating has excellent elasticity and corrosion resistance, the synthetic resin is more resistant and hydrolyzed. Its molecular formula (1).
In this work, acrylate monomers (MMA, BA) the introduction of AAEM, monomer pre emulsification method and semi-continuous seed emulsion polymerization, was prepared with the properties of room temperature curing reactive acrylic emulsion. At the end of the emulsion polymerization, the silane coupling agent db-550 was introduced, and the self-crosslinking silicone emulsion was prepared.
Experimental raw materials and instruments: methyl methacrylate, butyl methacrylate: the analytical pure, the above monomer is distilled by the former decompression and refrigerated in the refrigerator; Acetoacetic acid ethyl methacrylate (AAEM); Ammonium sulphate, sodium bicarbonate, sodium lauryl sulfate (SDS) : analytical; Op-10 (polyethylene glycol octyl phenyl ether) : analytical pure; DB - 550 (gamma-aminopropyl triethoxysilane); Hh-1 smart digital display thermostatic water bath pot; Jb90-s digital display speed electric mixer.
The preparation of room temperature self-crosslinked silicone emulsion. Monomer preemulsion. In 250 mL flask three, 40 g deionized water and emulsifier (OP - 10 0.63 g and 0.31 g) of SDS, under 45 ℃, 30 min to 300 r/min mixing, join in turn AAEM 5.0 g and 25.0 g MMA, BA 25.0 g, continue to stir for 30 min, a quick pre emulsion.
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.
The preparation of silicone emulsion. Equipped with three flask of mixer, condenser pipe, adding deionized water 30 g, emulsifier OP - 10 0.30 g and 0.15 g) of SDS, stirring evenly dispersed, and in turn add buffer 0.21 g, 15 g of pre emulsified monomers and initiator ammonium persulfate solution 5 g ammonium persulfate in 10 g water (0.25 g). At the same time to heat up to 80 ℃, speed control in 220 r/min. After the emulsion is a bit blue, the droplet is added to the remaining pre-emulsified monomer, controlling the acceleration of the droplet, the 2 h drop is complete, and the control speed is 190 r/min. In addition, the supplement is 2.5 g.
After the monomer is added, add the remaining initiator. Continue to 1 h reaction, and tended to heat up to 85 ℃. End of the reaction, cooling to room temperature, adding the right amount of DB - 550, mixing 0.5 h filter the material, can be self - crosslinking acrylic emulsion, water emulsion obviously pan blue light.
Emulsion performance testing. Centrifugal stability test: the ld5-2a centrifuge is used to determine the layer and precipitation of 30 min for 3, 000 r/min at room temperature.
Determination of water absorption of eta: latex film emulsion coating on the teflon plate, put in oven, 60 ℃ drying 4 h, completely dry film after weighing (quality of M0). Immersed in deionized water (24 ~ 25 ℃), after a period of time, absorb with filter paper on the surface of the water, quickly said quality (M).
Infrared spectrum testing: the coating of the emulsion on the polytetrafluoroethylene plate is dried into the membrane and the Nicolet 380 Fourier infrared spectrometer is used.
Thermal reanalysis test (TGA) : a Q50 thermograph produced by the U.S. TA company to direct the emulsion membrane.
Differential scanning calorimetry (DSC) : the Q20 differential scanning calorimeter produced by the U.S. TA company was directly determined by the emulsion membrane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
With the increasing consciousness of the human environment, the development of the environment-friendly coating has become the main direction of the development of the coating industry.
From the perspective of development of water-based acrylic resin coating is water-based paint in the fastest growing, most varieties of environmentally friendly coatings, its color shallow, light color, weather resistance, corrosion resistance, etc. However, the normal acrylic emulsion is not good in water, and it is not good. Therefore people mainly use organic silicon, organic fluorine, polyurethane, etc. [6-8] to be modified, so as to improve the water resistance of latex film contamination resistance, weather resistance, etc.
The acetyl methacrylate (AAEM) is a methacrylate monomer that can be used to synthesize acrylic latex for low-voc industry and building coatings. The AAEM improves the elasticity and toughness of the coating, reducing the glass transition temperature. At the same time, the coating has excellent elasticity and corrosion resistance, the synthetic resin is more resistant and hydrolyzed. Its molecular formula (1).
In this work, acrylate monomers (MMA, BA) the introduction of AAEM, monomer pre emulsification method and semi-continuous seed emulsion polymerization, was prepared with the properties of room temperature curing reactive acrylic emulsion. At the end of the emulsion polymerization, the silane coupling agent db-550 was introduced, and the self-crosslinking silicone emulsion was prepared.
Experimental raw materials and instruments: methyl methacrylate, butyl methacrylate: the analytical pure, the above monomer is distilled by the former decompression and refrigerated in the refrigerator; Acetoacetic acid ethyl methacrylate (AAEM); Ammonium sulphate, sodium bicarbonate, sodium lauryl sulfate (SDS) : analytical; Op-10 (polyethylene glycol octyl phenyl ether) : analytical pure; DB - 550 (gamma-aminopropyl triethoxysilane); Hh-1 smart digital display thermostatic water bath pot; Jb90-s digital display speed electric mixer.
The preparation of room temperature self-crosslinked silicone emulsion. Monomer preemulsion. In 250 mL flask three, 40 g deionized water and emulsifier (OP - 10 0.63 g and 0.31 g) of SDS, under 45 ℃, 30 min to 300 r/min mixing, join in turn AAEM 5.0 g and 25.0 g MMA, BA 25.0 g, continue to stir for 30 min, a quick pre emulsion.
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.
The preparation of silicone emulsion. Equipped with three flask of mixer, condenser pipe, adding deionized water 30 g, emulsifier OP - 10 0.30 g and 0.15 g) of SDS, stirring evenly dispersed, and in turn add buffer 0.21 g, 15 g of pre emulsified monomers and initiator ammonium persulfate solution 5 g ammonium persulfate in 10 g water (0.25 g). At the same time to heat up to 80 ℃, speed control in 220 r/min. After the emulsion is a bit blue, the droplet is added to the remaining pre-emulsified monomer, controlling the acceleration of the droplet, the 2 h drop is complete, and the control speed is 190 r/min. In addition, the supplement is 2.5 g.
After the monomer is added, add the remaining initiator. Continue to 1 h reaction, and tended to heat up to 85 ℃. End of the reaction, cooling to room temperature, adding the right amount of DB - 550, mixing 0.5 h filter the material, can be self - crosslinking acrylic emulsion, water emulsion obviously pan blue light.
Emulsion performance testing. Centrifugal stability test: the ld5-2a centrifuge is used to determine the layer and precipitation of 30 min for 3, 000 r/min at room temperature.
Determination of water absorption of eta: latex film emulsion coating on the teflon plate, put in oven, 60 ℃ drying 4 h, completely dry film after weighing (quality of M0). Immersed in deionized water (24 ~ 25 ℃), after a period of time, absorb with filter paper on the surface of the water, quickly said quality (M).
Infrared spectrum testing: the coating of the emulsion on the polytetrafluoroethylene plate is dried into the membrane and the Nicolet 380 Fourier infrared spectrometer is used.
Thermal reanalysis test (TGA) : a Q50 thermograph produced by the U.S. TA company to direct the emulsion membrane.
Differential scanning calorimetry (DSC) : the Q20 differential scanning calorimeter produced by the U.S. TA company was directly determined by the emulsion membrane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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