Powder rubber preparation method

Abstract

The invention discloses a powder rubber preparation method, and relates to the technical field of rubber preparation. The powder rubber preparation method comprises three process steps of performing ball milling, stirring and performing spray-drying. According to the method disclosed by the invention, the hydrophilicity of carbon black can be improved through wet ball milling processing; sodium dodecyl benzene sulfonate serving as a surfactant is favorable to the diffusion of the carbon black in natural latex; the carbon black and the natural latex are mixed and are fully stirred, so that a carbon black / natural latex suspension in a stable state is favorably prepared; under similar conditions, compared with mechanically mixed rubber material, the curability of the powder rubber prepared by the spray-drying method is greatly improved, the peak value of the torque of a vulcanization curve is improved by about one time, the scorch time in rubber preparation can be effectively shortened, and the preparation process is simple.

Description

technical field [0001] The invention relates to the technical field of rubber preparation, in particular to a method for preparing powdered rubber. Background technique [0002] Powdered rubber has the advantages of easy metering, automatic and continuous processing, shortened mixing time and prolonged scorch time, etc. In the field of polymer modification and polymer modification, a variety of preparation methods have been formed based on block rubber (raw rubber block and vulcanizing agent), latex, glue liquid and suspension, and based on powder forming technology and isolation technology. The drying method is the main method for forming latex and glue into powder. The powder rubber particles prepared are small and round. The application number is CN201310263094.7. A preparation method of powder rubber is disclosed, that is, the release agent and the coagulant aqueous solution are added to the In an organic solvent, at room temperature, fully stir to form a dispersion sys...

AI Technical Summary

Problems solved by technology

[0002] Powdered rubber has the advantages of easy metering, automatic and continuous processing, shortened mixing time and prolonged scorch time, etc. In the field of polymer modification and polymer modification, a variety of preparation methods have been formed based on block rubber (raw rubber block and vulcanizing agent), latex, glue liquid and suspension, and based on powder forming technology and isolation technology. The drying method is the main method for forming latex and glue into powder. The powder rubber particles prepared are small and round. The application number is CN201310263094.7. A preparation method of powder rubber is disclosed, that is, the release agent and the coagulant aqueous solution are added to the In an organic solvent, at room temperature, fully stir to form a dispersion system; then continue to stir, and slowly add rubber emulsion, and then separate, wash, dehydrate, and dry to obtain powdered rubber. The obtained powdered rubber particles are uniform and the particles are not bonded. No agglomeration during storage, fast powder formation, high production efficiency, and non-toxic or low-toxic organic solvents, which can be effectively recycled and reused after use, with little loss and harmless to the environment. The powdering process of rubber latex with high Mooney viscosity and low Mooney viscosity, but the powder rubber produced by this method has low vulcanization performance, prolongs the scorch time during rubber preparation, and the preparation process is complicated