News Details
Waterborne polyurethane flame retardant
2017-11-4 11:21:54
Waterborne polyurethane flame retardant
Waterborne polyurethane coatings are one of the fastest developing varieties in waterborne coatings due to their superior comprehensive properties. Waterborne polyurethane flame retardant has been studied.
In order to further improve the properties of waterborne polyurethane flame retardant, it is necessary to modify the waterborne polyurethane flame retardant.
Water borne coating is a kind of coating with water as dispersing medium. It has the advantages of low consumption of resources, low volatile organic compounds (VOC), no toxicity and no pollution. Waterborne polyurethane coating waterborne polyurethane curing agent to synthesis of high solid content polyurethane coatings, corrosion resistance, strong mechanical properties, low VOC content and good adhesion of coating and water-based paint combination, reduce the harm to the environment.
With the gradual enhancement of people's awareness of environmental protection, environmental protection and national regulations on paint containing volatile organic compounds were strictly controlled, making the development of waterborne polyurethane coatings with high performance and low pollution has become a hot spot. Earlier application of waterborne polyurethane coatings, with low curing degree, high elongation, drying at room temperature compared to features. With the traditional solvent based polyurethane coatings, waterborne polyurethane coating chemical resistance, solvent resistance, coating feel bad, low gloss, through modification for improving its performance. This paper reviews the progress in the study of waterborne polyurethane curing agent modification in recent years.
Epoxy resin has excellent physical and chemical properties, high bonding strength, high thermal stability and other advantages, in the reaction of epoxy resin and polyurethane, branching into the main chain, forming part of network structure, the formation of curing, improve the molecular weight of the polymer, thereby improving the mechanical properties of waterborne polyurethane, water resistance and adhesion etc..
Wang Xiaorong through the emulsion to waterborne polyurethane / polyacrylate (WPUA) in the introduction of glycidyl methacrylate (GMA) and emulsifier allyloxy hydroxypropyl sodium sulfonate (AHPS), prepared solid content about waterborne polyurethane / polyacrylate 43%.
The double bond and the epoxy group GMA, carboxyl reaction, epoxy group and DMPA were cured; AHPS can reduce the emulsion interfacial energy, the groups contained in the binding to the surface of polymer particles can improve the solid content. The results show that the water resistance, modified coating hardness and adhesion are improved.
By Li Bing KH550 in the first open primary amine epoxy group, and then modified the waterborne polyurethane as chain extender, street waterborne polyurethane prepolymer, the successful preparation of aqueous polyurethane emulsion stability. Structure of the resin used for instrument were characterized, results show that KH550 successfully opened the epoxy group, and connected to the silicone functional material, the contact angle of the synthetic resin is greatly improved.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
Acrylate has good water resistance and weatherability, by UV yellowing etc., acrylic resin and polyurethane resin composite can play a complementary role, waterborne polyurethane coatings were prepared with the comprehensive performance of the two.
ZHU study showed that under UV irradiation, aliphatic polyurethane coating resistance decreased, coating capacitance and porosity increased higher than that of the acrylic polyurethane, reduced aliphatic polyurethane coating resistance to 106 ohm Cm2? 28d, and acrylic polyurethane composite coating to 35d fracture, which is mainly attributed to the acrylic polyurethane C = O bond breaking slowly. From this we can see the advantages compared with the same type of polyurethane acrylate polyurethane.
The flame retardant curing agent was obtained by adding three bromo phenyl glycidyl ether or bromo cresol type diglycidyl ether with low aliphatic amine, such as two ethylene three amine, the bromine content is more than 25%, and the flame retardant has certain flame retardancy after curing.
Phenyl glycidyl ether colorless transparent liquid, soluble in ether, benzene, insoluble in water, can evaporate with water vapor. A drain or sewer stored in shady places. Separate with strong oxidant, alkali, acid and amine. Save in the dark. Used as a reactive diluent of epoxy adhesive, the intermediate of organic synthesis.
Phenyl glycidyl ether by phenol; epichlorohydrin in the presence of sodium hydroxide and condensation. Adding phenol, sodium hydroxide, mixing and stirring to all dissolve, cooling to 5-6 DEG C, adding epoxy chloropropane slowly. After mixing, 45h was stirred at 25 DEG C, the reaction was extracted with ether, and the extract was dried with anhydrous potassium carbonate. The ether was recovered from the filtrate, and the 120-123 - (1.46kPa) fraction was obtained by vacuum distillation, which was an epoxy propyl phenyl ether.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Waterborne polyurethane coatings are one of the fastest developing varieties in waterborne coatings due to their superior comprehensive properties. Waterborne polyurethane flame retardant has been studied.
In order to further improve the properties of waterborne polyurethane flame retardant, it is necessary to modify the waterborne polyurethane flame retardant.
Water borne coating is a kind of coating with water as dispersing medium. It has the advantages of low consumption of resources, low volatile organic compounds (VOC), no toxicity and no pollution. Waterborne polyurethane coating waterborne polyurethane curing agent to synthesis of high solid content polyurethane coatings, corrosion resistance, strong mechanical properties, low VOC content and good adhesion of coating and water-based paint combination, reduce the harm to the environment.
With the gradual enhancement of people's awareness of environmental protection, environmental protection and national regulations on paint containing volatile organic compounds were strictly controlled, making the development of waterborne polyurethane coatings with high performance and low pollution has become a hot spot. Earlier application of waterborne polyurethane coatings, with low curing degree, high elongation, drying at room temperature compared to features. With the traditional solvent based polyurethane coatings, waterborne polyurethane coating chemical resistance, solvent resistance, coating feel bad, low gloss, through modification for improving its performance. This paper reviews the progress in the study of waterborne polyurethane curing agent modification in recent years.
Epoxy resin has excellent physical and chemical properties, high bonding strength, high thermal stability and other advantages, in the reaction of epoxy resin and polyurethane, branching into the main chain, forming part of network structure, the formation of curing, improve the molecular weight of the polymer, thereby improving the mechanical properties of waterborne polyurethane, water resistance and adhesion etc..
Wang Xiaorong through the emulsion to waterborne polyurethane / polyacrylate (WPUA) in the introduction of glycidyl methacrylate (GMA) and emulsifier allyloxy hydroxypropyl sodium sulfonate (AHPS), prepared solid content about waterborne polyurethane / polyacrylate 43%.
The double bond and the epoxy group GMA, carboxyl reaction, epoxy group and DMPA were cured; AHPS can reduce the emulsion interfacial energy, the groups contained in the binding to the surface of polymer particles can improve the solid content. The results show that the water resistance, modified coating hardness and adhesion are improved.
By Li Bing KH550 in the first open primary amine epoxy group, and then modified the waterborne polyurethane as chain extender, street waterborne polyurethane prepolymer, the successful preparation of aqueous polyurethane emulsion stability. Structure of the resin used for instrument were characterized, results show that KH550 successfully opened the epoxy group, and connected to the silicone functional material, the contact angle of the synthetic resin is greatly improved.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
Acrylate has good water resistance and weatherability, by UV yellowing etc., acrylic resin and polyurethane resin composite can play a complementary role, waterborne polyurethane coatings were prepared with the comprehensive performance of the two.
ZHU study showed that under UV irradiation, aliphatic polyurethane coating resistance decreased, coating capacitance and porosity increased higher than that of the acrylic polyurethane, reduced aliphatic polyurethane coating resistance to 106 ohm Cm2? 28d, and acrylic polyurethane composite coating to 35d fracture, which is mainly attributed to the acrylic polyurethane C = O bond breaking slowly. From this we can see the advantages compared with the same type of polyurethane acrylate polyurethane.
The flame retardant curing agent was obtained by adding three bromo phenyl glycidyl ether or bromo cresol type diglycidyl ether with low aliphatic amine, such as two ethylene three amine, the bromine content is more than 25%, and the flame retardant has certain flame retardancy after curing.
Phenyl glycidyl ether colorless transparent liquid, soluble in ether, benzene, insoluble in water, can evaporate with water vapor. A drain or sewer stored in shady places. Separate with strong oxidant, alkali, acid and amine. Save in the dark. Used as a reactive diluent of epoxy adhesive, the intermediate of organic synthesis.
Phenyl glycidyl ether by phenol; epichlorohydrin in the presence of sodium hydroxide and condensation. Adding phenol, sodium hydroxide, mixing and stirring to all dissolve, cooling to 5-6 DEG C, adding epoxy chloropropane slowly. After mixing, 45h was stirred at 25 DEG C, the reaction was extracted with ether, and the extract was dried with anhydrous potassium carbonate. The ether was recovered from the filtrate, and the 120-123 - (1.46kPa) fraction was obtained by vacuum distillation, which was an epoxy propyl phenyl ether.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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