Views:2 Author:Site Editor Publish Time: 2020-08-24 Origin:Site
Hydroxypropyl methyl cellulose (HPMC), is a cellulose carboxymethyl group substituted products. According to their molecular weight or degree of substitution, can be completely soluble or insoluble polymer, which can be used as a weak acid cation exchange agent, for the separation of neutral or alkaline protein. Carboxymethyl cellulose can form colloidal solution, high viscosity, adhesion, thickening, emulsifying, flow, shaped, water retention, protective colloid, film forming, acid resistance, salt tolerance, suspension and other characteristics, and the physiological harm, so it has been widely used in food, medicine, daily chemical, petroleum, papermaking, textile, construction and other fields in production.
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