Construction grade Hydroxypropyl Methyl Cellulose

Construction grade Hydroxypropyl Methyl Cellulose

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Construction grade Hydroxypropyl Methyl Cellulose uses refined cotton as raw material to produce cellulose ether through a series of chemical processing. Mainly used in the construction industry-cement mortar, water-resistant putty powder, putty paste, paint glue and other dry building materials; good water retention effect, easy construction, good brightness. HPMC produced by MST has stable performance, viscosity and gel time can be customized according to customer needs.

Construction grade Hydroxypropyl Methyl Cellulose improves the dispersion of cement-sand in cement mortar, greatly improves the plasticity and water retention of the mortar, has an effect on preventing cracks, and can enhance the strength of cement;

Water retention of construction grade Hydroxypropyl Methyl Cellulose to cement mortar:

1、The viscosity, dosage, ambient temperature and molecular structure of Construction grade Hydroxypropyl Methyl Cellulose have a great influence on its water retention performance. Under the same conditions, the higher the viscosity of Construction grade Hydroxypropyl Methyl Cellulose, the better the water retention; the higher the content, the better the water retention, and the higher the ambient temperature, the water retention of cellulose ether usually decreases, but some modified Construction grade Hydroxypropyl Methyl Cellulose also has better water retention under high temperature conditions; Construction grade Hydroxypropyl Methyl Cellulose with a lower degree of substitution has better water retention.

2、The hydroxyl group on the Construction grade Hydroxypropyl Methyl Cellulose molecule and the oxygen atom on the ether bond will associate with the water molecule to form a hydrogen bond, turning the free water into bound water, thus playing a good water retention effect; the water molecule and the hydroxypropyl methyl group The mutual diffusion between cellulose molecular chains allows water molecules to enter the hydroxypropyl methyl cellulose macromolecular chain, and is subject to a strong binding force, thereby forming free water, entangles the water, and improves the water retention of cement slurry;

Therefore, in the production of building materials, especially dry mortar, Construction grade Hydroxypropyl Methyl Cellulose plays an irreplaceable role and is an indispensable and important part.