Hydroxypropyl Methyl Cellulose (HPMC), known chemically by CAS 9004-65-3, is a fascinating polymer with a remarkable range of functionalities across various industries. Understanding its scientific underpinnings is key for researchers and product developers seeking to harness its full potential. As a leading HPMC manufacturer in China, we are committed to providing high-quality materials and detailed technical insights.

HPMC is a semisynthetic, inert, and non-ionic polymer derived from cellulose. Its structure is characterized by ether linkages and the presence of both methoxy and hydroxypropyl groups, which impart unique solubility and thermal properties. These modifications allow HPMC to dissolve in cold water, unlike its precursor cellulose, and exhibit reversible gelation upon heating.

Key Chemical Properties:

  • Solubility: HPMC is readily soluble in cold water, forming clear to slightly hazy colloidal solutions. Its solubility is influenced by the degree of substitution of its functional groups. Lower viscosity grades generally exhibit higher solubility.
  • Thermal Gelation: A distinctive property of HPMC solutions is their ability to undergo thermal gelation. Upon heating to a specific temperature range, the solution becomes cloudy and forms a gel. This process is reversible; the gel reverts to a solution upon cooling. The gelation temperature is dependent on the HPMC grade and solution concentration.
  • Surface Activity: HPMC solutions display surface activity, contributing to their effectiveness as emulsifiers and suspending agents.
  • Viscosity: The viscosity of HPMC solutions is a critical parameter, often used to classify different grades. Viscosities can range from a few centipoise to tens of thousands, significantly impacting its performance as a thickener or binder. Our HPMC is available in a wide viscosity range, such as the 40-60 mPa.s USP grade.

Applications Driven by Properties:

These properties make HPMC exceptionally versatile. In pharmaceuticals, it’s used for controlled-release matrices and tablet coatings. In construction, it improves water retention and workability in mortars and tile adhesives. In food, it functions as a thickener and emulsifier, while in cosmetics, it enhances texture and stability. For those looking to buy HPMC, understanding these property-application relationships is paramount.

Sourcing HPMC from a reliable manufacturer like us ensures you receive products with consistent chemical properties and performance. We offer competitive industrial HPMC pricing and can provide the technical data you need to select the optimal grade for your application. Partner with us to leverage the scientific advantages of HPMC for your product development.