01. The difference between fake hydroxypropyl methyl and high-quality hydroxypropyl methyl
Appearance: Pure starch HPCM appears too homogeneous, between 0.3 and 0.4 g/ml. Amylum binds to starch so HPCM is a liquid and less stressed than regular detoxifiers.
Conditions: starch full of starch, hpm powder, fiber under microscope or magnifying glass, HPCM a kind of starch that can control starch or starch and lentils.
Odor: Pure hydroxypropyl methylcellulose HPMC can’t smell ammonia, starch and alcohol; adulterated hydroxypropyl methylcellulose HPMC can smell all kinds of smells, even if it is tasteless, it will feel weaker Shen.
Aqueous solution: pure, HPMC methylcellulose demethoxypropyl brinzolamide aqueous solution is clear, light water retention rate ≥ 97%; diluted hydrolyzed cellulose-diluted HPMC hydrolyzed cellulose is more turbid, water retention rate barely reaches 80% .
02. The preservation of methyl cellulose at high temperature is an important indicator to determine the quality of methyl cellulose ether. Factors such as air temperature, air temperature and wind speed affect the volatility of cement slurry and gypsum products. Therefore, adding the same amount of HPMC products in different seasons, there are certain differences in water-saving efficiency. In the specific working process, the effect of moisturizing serosa can be corrected by reducing the amount of HPMC added. High-quality hydroxypropyl methylcellulose HPMC can effectively solve the problem of high temperature water retention.
High-quality methyl cellulose can be evenly and effectively distributed in cement mortar and plastering products, forming an all-solid film, which is gradually released from the base layer and forms a hydrophilic reaction with inorganic curling materials, thereby ensuring the strength and toughness. HPMC cellulose methyl propoxylate is qualitative and uniform, and the oxygen of ethyl bromide and propionic acid groups along the molecular cellulose chain is uniform, which improves the oxygen and hydrogen bonding of each key atom of hydroxyl and ether The low water can convert free water into leather-saving water, thereby effectively controlling water evaporation, generating heat, and high water-based moisture.
Due to the high temperature construction in summer, in order to achieve the effect of water saving, it is necessary to add high-quality HPMC products according to the formula, otherwise it will cause problems such as excessive drying, low strength, cracking, idle shock and dropout, and increase the difficulty of construction for workers. While lowering the temperature, it is possible to gradually reduce the amount of HPMC added and obtain the same water-saving effect.
Post time: Apr-21-2023