Stable low molecular weight dispersing agent

Abstract

A low molecular weight dispersant with stable molecular weight relates to a chemical compound, in particular to a low molecular weight dispersant with stable molecular weight, which uses water as a solution with a weight percent of 30 percent to 70 percent, uses acrylics or salts thereof as reactive monomers with a weight percent of 30 percent to 70 percent, uses a water soluble photoinitiator as an initiated medium with a molecular fraction of 0.05 percent to 2 percent of the acrylics or salts thereof to compound a low molecular weight dispersant with stable molecular weight with the effect of ultraviolet light. The product of the invention can be taken as dispersants for inorganic particles that include magnesium oxide, cement, calcium carbonate superfine powder, plaster, ceramics, jade powder and clay powder and so on, which is particularly suitable for water-based inorganic dispersing system like magnesium oxychloride cement and so on, not only having excellent dispersing effect, but also having great dispersing stability.

Description

technical field [0001] The invention relates to a chemical composition, in particular to a low molecular weight dispersant with stable molecular weight. Background technique [0002] In order to uniformly and stably disperse the solid particles in the liquid, it is necessary to add a dispersant, so the dispersant is widely used in materials, medicine, food, paint, construction, papermaking, ink, metallurgy and other fields, which makes the use of high-efficiency dispersants appears to be very important. [0003] The acrylic polymer involved in the present invention is used as a dispersant when preparing magnesium oxychloride cement, and its molecular weight is generally not high, about several thousand to tens of thousands. The latest research results show that such dispersants with a molecular weight of three thousand to five thousand Acrylics have the best dispersion effect, and because acrylics are highly reactive, it is difficult to make low molecular weight products. ...

AI Technical Summary

Problems solved by technology

[0005] 1. Control the molecular weight by adding chain transfer agent isopropanol, etc., and then remove isopropanol (boiling point 82.5°C). This method not only consumes a lot of energy, but also has residual isopropanol, which affects the stability of product quality

[0006] 2. Initiate the polymerization of acrylic monomers by adding a redox initiator. After the reaction is over, since this type of initiator can continue to initiate polymerization at room temperature, the molecular weight of the aqueous solution of the product will change with the storage time during storage. The extension increases, thus affecting the dispersion effect

[0007] 3. If the molecular weight is controlled by using a mercapto compound with an unpleasant smell as a chain transfer agent, it will pollute the environment and the production cost will be high

[0008] In conclusion, the currently prepared low molecular weight acrylic dispersants are of unstable product quality, high production cost or unfriendly to the environment

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