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Hydroxypropyl methyl cellulose, is a nonionic cellulose mixed ether. It is a semi-synthetic, inactive, viscoelastic polymer commonly used as a lubricant in ophthalmology, or as an excipient or excipient in oral medicine.

First of all, the raw material for the preparation of PCE Powder is the mother liquor of polycarboxylic acid water-reducing agent, and the mother liquor prepared by each manufacturer is different. To study its principle, in addition to external factors such as environmental temperature and manual operation, the process of polymerization monomer is also different. Therefore, if a manufacturer cannot control the production of polycarboxylic acid mother liquor, he can only purchase the mother liquor with different performance from other manufacturers and the quality of each batch can not be guaranteed to spray powder, resulting in the quality of PCE Powde produced.

VAE Re-dispersible Polymer Powder to improve the adhesion and mechanical properties of putty.

In recent years, with the continuous development of external insulation technology, hydroxypropyl methyl cellulose production technology progress, as well as hydroxypropyl methyl cellulose HPMC itself has excellent characteristics, hydroxypropyl methyl cellulose HPMC in the construction industry has been widely used. In order to investigate the interaction mechanism between HPMC and cement-based materials, this paper focuses on the improvement effect of HPMC on the cohesion of cement-based materials.

1. VAE Re dispersible Polymer Powder is a water-soluble redispersible powder, which can be divided into ethylene/vinyl acetate copolymer, vinyl acetate/ethylene tert carbonate copolymer, acrylic acid copolymer, etc. The powder adhesive made by spray drying uses polyvinyl alcohol as a protective adhesive.

High-quality HPMC can be evenly and effectively dispersed in cement mortar and gypsum based products, and wrap all solid particles, and form a layer of wetting film. The moisture in the base is gradually released over a long period of time, and hydrates with inorganic cementitious materials, thus ensuring the bonding strength and compressive strength of the materials. Therefore, in high temperature summer construction, in order to achieve the water retention effect, it is necessary to add enough high-quality HPMC products according to the formula, otherwise, quality problems such as insufficient hydration, strength reduction, cracking, hollowing and falling off caused by drying too fast will occur, and the construction difficulty of workers will also be increased. As the temperature decreases, the amount of HPMC can be gradually reduced, and the same water retention effect can be achieved.

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Enhance the adhesion with the masonry surface, and can enhance the water retention, so that the strength of mortar can be improved. Improve the lubricity and plasticity to improve the construction performance, save time and improve the cost efficiency.

Cold water instant HPMC can be used for putty powder, mortar, liquid glue, liquid paint and daily chemical products. Hot melt HPMC is usually used in dry powder products and directly mixed with dry powder for uniform application, such as putty powder and mortar. Hydroxypropyl methyl cellulose can be widely used to improve the performance of cement, gypsum and other hydrate building materials. In cement-based mortar, it can improve water retention, extend correction time and opening time, and reduce flow suspension.

1. High water reduction rate: it has excellent water reduction rate and plasticity, and it still has excellent water reduction performance at low dosage, especially in cement-based mortar, gypsum based mortar and high-grade concrete, with a high water reduction rate of 40%;