Waterborne polyurethane-acrylate interpenetrating polymer network copolymer emulsion continuous production method and device

Abstract

The invention discloses a waterborne polyurethane-acrylate interpenetrating polymer network copolymer emulsion continuous production method and device. The method comprises carrying out polyol manufacture or polyol dehydration through a high temperature reactor, putting the product into a prepolymerization reactor, carrying out performed polymer synthesis, hydrophilic chain extension and primary acrylate grafting insertion into the polyurethane performed polymer, transferring the performed polymer into a high-speed dispersion kettle, carrying out neutralization, adding water into the high-speed dispersion kettle, carrying out high-speed dispersion to obtain a uniform dispersion liquid, transferring the dispersion liquid into a solvent removal or polymerization kettle, carrying out secondary chain extension, carrying out reduced pressure removal on the solvent in the dispersion liquid, reducing water in the gaseous solvent through a cyclone separator and carrying out acrylate pre-emulsion-polyurethane copolymerization in an emulsification kettle to obtain a high-quality waterborne polyurethane-acrylate interpenetrating polymer network copolymer emulsion. The method and device greatly reduce labor intensity, reduce material adhesion caused by fault of a pipe device such as a pump, greatly improve production efficiency, reduce a formula material loss and reduce a production cost.

Description

technical field [0001] The invention relates to the technical field of chemical adhesive production, in particular to a continuous production method and equipment for water-based polyurethane acrylate interpenetrating polymer network copolymerization emulsion. Background technique [0002] In recent years, with the increasingly stringent environmental protection regulations in various countries, water-based adhesives have developed rapidly. Water-based polyurethane has good wear resistance, flexibility, low temperature resistance and fatigue resistance, etc., but has poor water resistance, solvent resistance, low solid content, and poor self-thickening property. [0003] Water-based acrylate emulsion: excellent adhesion, low price, excellent color retention, weather resistance, oil resistance. However, it tends to become brittle at low temperature and sticky at high temperature. [0004] Therefore, scientific researchers at home and abroad have modified them with complemen...

AI Technical Summary

Problems solved by technology

[0007] (1) The production process adopts "better soldiers and simpler administration" --- there are only one or two reactors in total, and there are more or less residues, cross-infection, and by-products in the reactor between the upper and lower processes or between production batches The ratio is increased, and the deviation from the formula design is large

(2), and because the reaction temperature sections required by each process flow are not exactly the same, the reaction is carried out in the same kettle, the temperature control is not timely, the side reactions increase, the molecular weight distribution is wide, the product purity is low, and the performance declines

(3), or add a few more sets of equipment, lack of system, increase pumps and pipelines and transport materials over many bends or long distances, temperature and flow do not match, materials are easy to block or leak in pumps or pipelines and other equipment, labor High strength, more equipment failures, material adhesion, large loss, low production yield and reduced production efficiency, the product deviates from the original design of the formula

(4) In the process of removing the solvent from the dispersion, the traditional process has no cyclone separator, the recovered solvent has a high water content, the recovered solvent has a narrow use area, low-cost treatment, and is allocated to the production cost of the emulsion, and the production cost of the emulsion increases.

Images