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DS: the substituent of HPMC is Hydroxypropyl and Methoxy. The ratio of them affects HPMC properties. The higher the hydroxypropyl content, the better the water retention effect. The lower the methoxy content, the higher the gel temperature. The DS of HPMC is 1.2-2.0. But HEC substituent is Hydroxyethyl substituent. Its DS is 1.5-2.0.
1. Pharmaceuticals HEC is commonly used as a thickening agent and stabilizer in oral suspensions, tablets, and capsules Pharmaceuticals HEC is commonly used as a thickening agent and stabilizer in oral suspensions, tablets, and capsulesIn tile adhesives and self-leveling compounds, HPMC enhances adhesion, ensuring a strong bond between the substrate and the applied material.
HPMC is used as a binder, water retention agent, and plasticizer in cement-based products, such as mortars, plasters, and grouts. It is also used as a water-soluble polymer in the production of gypsum board and as a rheology-modifying agent in paint and coatings.