Views:5 Author:Site Editor Publish Time: 2019-11-28 Origin:Site
HPMC is widely used in building materials, coatings, synthetic materials, ceramics, medicine, food, textile, agriculture, cosmetics, tobacco and other industries. Domestic HPMC is practically building grade. In building grade, putty powder is used In a large amount, about 90% of which is used for putty powder, and the rest is used for cement mortar and glue.The content and viscosity of hydroxypropyl group are two indicators that most users are concerned about. High hydroxypropyl content, water retention is generally better. Viscosity, water retention, relative (rather than absolute) is better, and viscous, better in cement mortar.HPMC is a multi-functional medicinal auxiliary, can be used as thickener, dispersant, emulsifier and film forming agent.As a film coating and adhesive in oral solid preparation, it can significantly improve the stability and dissolution of drugs, and enhance the water-resistance of tablets.
It can also be used as suspension aid for suspension, as matrix material for ophthalmic preparation, as skeleton material for hydrophilic gel skeleton sustained release tablets and gastric floating tablets.HPMC, combined with other macromolecular compounds or colloidal drugs, can prevent the separation of water or ethanol from transparent colloidal drugs, and has the effect of water retention.
HPMC can also be used as thickener and emulsifier in food industry and daily chemical industry to improve the rheological properties of products.
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Industrial-grade hydroxypropyl methyl cellulose used in mortar is distinguished by viscosity. Generally, the following types are commonly used Low viscosity: 400 is mainly used for self-leveling mortar. Reason: low viscosity, good leveling, high mortar density. Medium and low viscosity: 20000-400000
Hydroxypropyl methyl cellulose ether-HPMC, as an auxiliary additive widely used in the field of building materials, is mainly used for water retention, thickening and improving the workability of the finish product. Water retention rate is often one of the core indicators for selecting high-quality