Hydroxypropyl methyl cellulose can be distinguished from its water-holding capacity. The water retention of methyl cellulose ether at high temperature is an important target to distinguish the quality of methyl cellulose ether. Air temperature, temperature and wind pressure speed will affect the volatilization rate of water in cement mortar and gypsum-based commodities. Therefore, there are some differences in the water retention of commodities with the same amount of hydroxypropyl methyl cellulose added at different times. In the detailed construction, the water retention of slurry can be adjusted by increasing or decreasing the amount of hydroxypropyl methyl cellulose. Excellent hydroxypropyl methyl cellulose products can be useful for water retention at high temperatures. In the high temperature period, especially in the hot and dry area and the thin layer construction of the sunward surface, high quality hydroxypropyl methyl cellulose improves the water retention of the slurry. High-quality hydroxypropyl methyl cellulose has excellent homogeneity. Its methoxy and hydroxypropoxy groups distribute evenly along the cellulose molecular chain. It can improve the ability of oxygen atoms on hydroxyl and ether bonds to associate with water to form hydrogen bonds, make free water become bound water, and then control water transpiration caused by high temperature climate. To achieve high water retention. High-quality hydroxypropyl methyl cellulose can disperse evenly and usefully in cement mortar and gypsum-based commodities, and encapsulate all solid particles, and form a wet film. The moisture in the base gradually releases over a suitable period of time. It reacts with inorganic cementitious materials by hydration, and then ensures the bonding strength and compressive strength of the materials. Degree. Therefore, in high temperature summer construction, in order to achieve water conservation, high-quality hydroxypropyl methyl cellulose products need to be added in sufficient quantity according to the formula. Otherwise, the quality problems such as insufficient hydration, strength reduction, cracking, empty drum and drop caused by too fast dryness will appear, which will also increase the construction difficulty of workers. With the decrease of temperature, the addition of HPMC can be gradually reduced, and the same water retention effect can be achieved. Shanghai Rongou Chemical Technology Co., Ltd. mainly produces and manages various new environmentally friendly chemical additives such as cellulose ether, redispersible latex powder, lignocellulose and superplasticizer. Products are mainly used in dry mortar, decorative materials, road engineering, oil drilling, daily chemical and other fields. Welcome to inquire! |
