Low viscosity high solid content wax emulsion, preparation method and emulsifier thereof

Abstract

The invention relates to a wax emulsion with low viscosity and high solid content, a preparation method thereof and an emulsifier thereof. The emulsifier of the invention is prepared from raw materials containing the following mass parts ratio: 3-8 parts of sodium lauryl diphenyl ether disulfonate; 2-8 parts of sorbitol fatty acid ester; 1-9 parts of polyoxyethylene ether sorbitol fatty acid ester; 12-30 parts of A165 self-emulsifying monoglyceride; 4-12 parts of Brij-30 or brij-35; 1-6 parts of stearic acid. The high solid content wax emulsion of the invention is prepared from raw materials containing the following mass percentages: 50-55% of paraffin wax; 5-5.5% of that above emulsifier; 3-8% of assistant emulsifier; 0.1-0.5% of fluoropolymer; 0.2% of silicone oil defoamer; water allowance.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a wax emulsion with low viscosity and high solid content, a preparation method thereof and an emulsifier. Background technique [0002] Paraffin wax emulsion is one of the most important special wax products. It is a stable emulsion of solid-oil-water multiphase dispersion system produced by emulsification reaction of paraffin wax with emulsifiers of different types and performances and appropriate regulators. This emulsion has the advantages of stable performance, non-toxicity, non-corrosion, easy storage, and convenient use. At the same time, water is used to replace organic solvents in the preparation of paraffin wax emulsions, which greatly reduces the cost of wax products. Paraffin wax emulsions have broad application prospects. [0003] Wax emulsions with high solid content (generally referring to wax content higher than 40%) have the advantages of energy saving a...

AI Technical Summary

Problems solved by technology

However, the wax emulsions with good fluidity and stability on the market are generally low in solid content, and high solid content wax emulsions, especially wax emulsions with a solid content higher than 50%, usually have the following deficiencies: (1) the emulsifier The dosage is relatively high, usually higher than 20%, and the cost of emulsifier dosage is too high accordingly; (2) the viscosity is often relatively large, the fluidity is relatively large, and the particles are easy to become coarse, so the quality of the product is greatly reduced; ( 3) When the wax content is higher than 50%, the system is prone to instability and layered demulsification. For this, the current production practice is generally to add polymers such as polyvinyl alcohol and polyvinylpyrrolidone to strengthen the stability of the interfacial film. However, these polymers increase the viscosity of the dispersed phase to a certain extent, so it is easy to make the fluidity of the system worse

[0004] In addition, in the preparation process of wax emulsion, a single method is used for preparation or complex machinery and equipment are used for preparation. Wax emulsion prepared by a single method may have shortcomings such as insufficient fine particles and poor dispersibility. Machines and equipment such as homogenizers, colloid mills or ultrasonics and other high-shear dispersion methods, these machines and equipment are costly and the preparation process is more complicated

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