Application Of Soap Free Adhesive Emulsion In Electrostatic Flocking

In order to overcome the shortcomings of the presence of free emulsifiers in traditional emulsion polymerization, the emulsifier acrylate emulsion was synthesized by using polymerizable emulsifier, maleic anhydride fatty alcohol polyoxyethylene ether mono esterified material, and optimized. Soap free adhesive emulsion The polymerization process was characterized by FT-IR, laser particle size analyzer, TEM and DSC. The results show that the particle size distribution of emulsion particles is uniform, and the emulsion has good electrolyte resistance, and the water resistance of emulsion film is improved. The emulsion was applied to electrostatic flocking, and the relationship between flocking technology factors and flocking fastness was analyzed. The results showed that the adhesive property of the soap free adhesive was good, and the flocking fastness of the flocking fabric was more than 2000 times, which accords with the fastness requirement of the flocking fabric.

Electrostatic flocking is a process in which a short fiber pre treated is planted on the surface of the substrate coated with adhesives in a high pressure electrostatic field. Flocking adhesive is one of the key materials in flocking production, and polyacrylate emulsion adhesive is a very important variety in emulsion adhesive. It is widely used in coatings, textiles, leather, building seals and other fields. In general, polymerization of acrylic emulsion adhesives must be dispersed in water and other media in the presence of emulsifiers to form a stable emulsion. The emulsifier [4] is often retained in the product obtained by this method, which reduces the adhesion of emulsion adhesive on the substrate surface, and also has a negative effect on the surface properties, compactness, friction resistance and water resistance of emulsion adhesive. [5] For these reasons, soap free emulsion polymerization has been studied in recent years.

Soap free acrylate adhesive emulsion was prepared by using polymerizable emulsifier - maleic anhydride fatty alcohol polyoxyethylene ether esterification. Electrostatic flocking The application performance is studied. Maleic anhydride fatty alcohol polyoxyethylene ether mono esterification (homemade), butyl acrylate (BA) (analytical pure), methyl methacrylate polymerizable emulsifier synthesis process. The amount of fatty alcohol polyoxyethylene ether was added to four flasks containing thermometers, stirring rods and condensing pipes. After vacuum distillation, water was removed to the reaction temperature under the protection of nitrogen, and maleic anhydride and catalyst were added to the reaction at a certain time to neutralize the maleic anhydride fatty alcohol polyoxyethylene ether esterification.

Emulsion polymerization method: part of polymerizable emulsifier and deionized water into the emulsifier, stirring at room temperature to dissolve; the mass ratio of 6: 6: 1 monomer, MMA, BA, St monomer into the above aqueous solution, stirring the 30min, make pre emulsion; add residual polymerizable emulsifier, part of the initiator water solution, residual deionized water, pH value regulator and 10% of the pre emulsion to add to the reactor, heating and stirring, heating up to 75 degrees centigrade; when the emulsion appears blue, after the temperature falls, the remaining pre emulsion and initiator water solution is added in the 2H, and then continue to heat preservation 1H, until the temperature falls below 50 degrees Celsius, adjust the emulsion pH value to neutral. The emulsion polymerization process is pre emulsified.

The flocking process is slowly mixed with thickening agent HIT to the binder emulsion in the mixing process. After reaching the desired viscosity, the flocking is applied to the flocking base cloth, and is carried out in nylon wool. Flocking The 5min was dried at 80 C and then baked at high temperature.