News

　Hydroxypropyl methylcellulose, abbreviated as HPMC. The appearance is white or almost white powder; the main purpose is to be a dispersant in the production of polyvinyl chloride, the main auxiliary for the preparation of PVC by suspension polymerization.

Accurately weigh and measure the hydroxypropyl methylcellulose sample. Cover the crucible with a half cap with hydroxypropyl methylcellulose, and calculate the iron salt content: the mass of the plastic iron 1000 is measured for several times,

The wet-mixed mortar is cement, fine aggregate, additives and water, and various components are determined according to the performance. After measuring and mixing in a certain proportion at the mixing station, the mixture is transported to the place of use in a special container for storage, and the wet mix is ​​used within the specified time.

Adding hydroxypropyl methylcellulose to cement can slow down the hydration of cement. So what do you know about its principle? Let’s take a look at hydroxypropyl methyl cellulose to delay the hydration of cement. principle.

The viscosity of hydroxypropyl methylcellulose HPMC, which we usually say, refers to the result of its 2% aqueous solution at a temperature of 20 degrees Celsius. The viscosity of hydroxypropyl methyl cellulose is mainly divided into four categories: low viscosity, medium and low viscosity, medium viscosity and high viscosity. Different viscosities have different uses.

The shallow admixture, which plays a key role in improving the performance of building dry-mix mortar, accounts for more than 40% of the material cost in dry-mix mortar. Most additives in the domestic market are supplied by foreign manufacturers, and the reference dosage of products is also provided by the suppliers.

The characteristics and benefits of hydroxypropyl methylcellulose used in building materials are many. Sleochem gives you a detailed introduction:
Characteristics of hydroxypropyl methyl cellulose

1. The pure hydroxypropyl methylcellulose HPMC has a fluffy visual state and a small bulk density in the range of 0.3–0.4/ml; the adulterated hydroxypropyl methylcellulose HPMC has better fluidity and feel more Shen, there is a clear difference from the authentic appearance.

Hydroxypropyl methylcellulose is a cellulose ether derivative, and its production currently has two process routes: horizontal kettle dry method and vertical kettle solvent method;