HPMC (Hydroxypropyl Methyl Cellulose), or hypromellose, is a versatile, non-ionic cellulose ether derived from natural cellulose, appearing as a white powder that dissolves in water to form viscous solutions, widely used for thickening, water retention, binding, and film-forming in construction, pharma (drugs, cosmetics), food, and paints due to its stability and safety. It's produced by chemically modifying cellulose and offers excellent water solubility, salt resistance, and thermal gelation, making it a crucial additive for improving product performance across many industries.
What it is:
A semi-synthetic polymer made from natural cellulose (wood pulp/cotton).
A non-ionic ether, meaning it doesn't carry an electrical charge in water.
Tasteless, odorless, and non-toxic, approved for food and medicine.
Key Properties:
Water Solubility: Dissolves in cold water, forming clear, viscous solutions.
Thickening: Provides significant thickening in aqueous systems.
Water Retention: Prevents rapid water loss in building materials.
Film-Forming: Creates flexible, transparent films.
Thermal Gelation: Gels upon heating and re-dissolves upon cooling.
Stability: Stable across a wide pH range (3-11) and resistant to ionic interference.
Common Applications:
Construction: Tile adhesives, renders, putties (improving workability, water retention).
Pharmaceuticals: Tablet coatings, controlled-release drugs, eye drops, binders.
Food: Stabilizer, thickener, fat replacer.
Cosmetics: Thickener, emulsifier in creams and lotions.
Paints & Coatings: Thickener, dispersant, stabilizer.
Other: Adhesives, ceramics, textiles, agriculture.
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