Used in construction materials—such as putty powders, anti-crack mortars, and lightweight partition boards—that require high bonding strength, excellent water retention, and a certain level of anti-sagging resistance.
Commonly Used Specifications: e.g., 100,000, 150,000, and 200,000 mPa·s.
Dissolution Characteristics: Rapidly disperses upon contact with cold water; initially exhibits no viscosity, then gradually forms a transparent solution, ultimately dissolving into a uniform colloid.
Application Scenarios: Suitable for liquid adhesives, laundry detergents, fountain solutions (printing), glass cleaners, eye drops, wet-mix mortars, etc.
2. Slow-Dissolving HPMC
Dissolution Characteristics: Disperses relatively slowly upon contact with water; initially exhibits viscosity, then gradually forms a transparent solution; typically requires hot water to dissolve completely into a uniform colloid.
Application Scope: Suitable for dry-mix mortars, putty powders, gypsum blocks, lightweight partition boards, fire-retardant coatings, etc.
Third: Classified by Application Scenario and Performance Requirements
Based on specific application scenarios and performance demands, HPMC can be broadly categorized into three major grades: Construction Grade, Food Grade, and Pharmaceutical Grade. These different grades exhibit significant distinctions in terms of compositional purity, manufacturing processes, and functional characteristics.
