This type of thickening agent whose thickening aqueous solution depends on the distribution is mainly used for the thickening effect of various brands of toothpaste, hair conditioner, cosmetic lotion and antiperspirant. The consistency generally increases rapidly with the increase of the concentration and then tends to be smooth, and the rheological form is thixotropic. (Pyrrolidone) also stabilizes emulsion and suspension in the system. The modified product is mainly quaternary ammonium salt, which has lipophilicity after modification, and can be used in systems with high oil content. Polyoxyethylene: Generally, products with a relative molecular mass greater than 25,000 are called polyoxyethylene, and those with a relative molecular mass of less than 25,000 are called polyethylene glycols. The aqueous solution of polyoxyethylene is a pseudoplastic fluid when the mass fraction is a few percent, and the aqueous solution tends to be viscous.
For example, the object immersed in it is pulled out of the solution to form a long wire drawing and a film. The greater the relative molecular mass and the wider the relative molecular mass distribution, the greater the viscosity. (Pyrrolidone) the viscosity of its solution increases with the increase in relative molecular mass and concentration, and with the increase in temperature (10℃～90℃) And it dropped sharply. The rheological properties of an aqueous solution with a relative molecular mass of lXl05 are close to that of Newtonian fluid.
Thickening comes from the dissolution of polymer chains into the surfactant system. The thickening mechanism is mainly related to the polymer chains and does not depend on the surfactant system. The aqueous solution of polyoxyethylene will automatically oxidize and degrade under the action of ultraviolet rays, strong acids and transition metal ions (especially Fe3+, Cr3+ and Ni2+) and lose its viscosity. (Pyrrolidone) Other: PVM/MA decadiene cross-linked polymer (polyvinyl methyl ether/methyl acrylate and decadiene cross-linked polymer) is a new family of thickeners, personal care in the past 3 years It is quickly recognized in product industrial applications.
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They can stabilize and thicken emulsions, give excellent skin feel, and hardly feel sticky. It can be formulated into transparent styling gel, hair spray and latex. It can be used to thicken alcoholic solutions, glycerin and other non-aqueous systems. It can suspend active ingredients without emulsifiers. It can also be used in toothpaste. Clean and pure synergistic effect. PVP (Polyvinylpyrrolidone) is a kind of polyamide that is soluble in water and most solvents. The appearance is white or light yellow powder, or a transparent liquid, with good water solubility, and is a green chemical. PVP is widely used in industries such as medicine, cosmetics, detergents, beverages, textiles, papermaking, pesticides and printing.