Applications of fast-dissolving hydroxypropyl methylcellulose - HPMC

The difference between fast-dissolving and slow-dissolving hydroxypropyl methylcellulose (HPMC)is the exact opposite of what we might expect. Fast-dissolving HPMC increases viscosity quickly, while slow-dissolving HPMC increases viscosity even faster. This is because the cold-water fast-dissolving type of HPMC undergoes glyoxal surface treatment. When added to cold water, HPMC disperses rapidly, but it doesn't truly dissolve; the viscosity increases and the aqueous solution becomes clear, indicating complete dissolution. The hot-dissolving type does not undergo glyoxal surface treatment. Higher glyoxal concentrations result in faster dispersion but slower viscosity increases, while lower concentrations have the opposite effect.

Fast-dissolving HPMC products are mainly used in construction adhesives, water-based latex coatings, wet-mix mortars, spraying, and detergents. Qingquan's fast-dissolving HPMC is used in coatings. Rapidly soluble HPMC, due to its more uniform and complete distribution of substituents, strong antibacterial properties, and relatively stable viscosity, is being widely promoted in the coatings industry as a substitute for HEC. Its main advantages lie in its processing and raw materials, resulting in a significantly lower cost compared to HEC. It also offers rapid solubility, low splashing, good film-forming properties, good flow and leveling, low sagging, high brush viscosity, excellent pigment performance, and excellent biological stability.

Qingquan's rapidly soluble hydroxypropyl methylcellulose (HPMC) can be added to water-based emulsion coatings as a thickener and film-forming agent, improving product storage stability, uniform color development, good rheological properties, and ease of mechanical application. It also helps improve the coating's flexibility and gloss. An expert from the former Soviet Union stated that waterproof coatings obtained by adding uniformly distributed hydroxypropyl methylcellulose can rapidly form a film on any type of surface with excellent performance. They also exhibit good elasticity, airtightness, and water resistance. Qingquan instant hydroxypropyl methylcellulose (HPPMC) is widely used in wet-mixed mortars, primarily for its thickening and water-retention properties. Instant HPMC exhibits significantly better dispersion than slow-dissolving HPPMC, and the rate of viscosity increase can be controlled over time. It is also easier to mix and apply.

Qingquan instant HPMC performs exceptionally well in detergents and chemical products. Its high transparency, better water solubility, and controllable viscosity make it ideal as a thickener and water-retaining agent in these products.