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Zhengzhou hydroxypropyl methyl ether manufacturer
Zhengzhou hydroxypropyl methyl ether manufacturer
Zhengzhou hydroxypropyl methyl ether manufacturer. [Jilang building materials] hydroxypropylmethylcellulose endows the wet mortar with excellent viscosity, which can significantly increase the bonding ability between the wet mortar and the base, and improve the anti sagging performance of the mortar. It is widely used in plastering mortar, exterior wall external insulation system and brick bonding mortar. The thickening effect of cellulose ether can also increase the homogeneity and anti dispersion ability of fresh cement-based materials, prevent the stratification, segregation and bleeding of mortar and concrete, and can be used in fiber concrete, underwater concrete and self compacting concrete. Hydroxypropyl methylcellulose can not be used in which fields. Hydroxypropyl methylcellulose is a kind of chemical substance. In the process of use, it should be prevented from reacting with other chemical substances, affecting its own properties, resulting in its abnormal use. Where HPMC can not be used? Generally speaking, there are: strong acid solution, soluble iron salt solution, some metal solutions, etc. When it is uncertain whether hydroxypropylmethylcellulose will react with a certain chemical raw material, a small amount of experiments can be used to avoid the situation that hydroxypropylmethylcellulose cannot be used due to chemical reaction. The development and market trend of HPMC: HPMC is a sub industry of fine chemical fiber industry. If it is deeply connected with the downstream demand, there will be great development space in the future. In order to break through the application bottleneck, the hydroxypropyl methylcellulose industry, and strive to meet and meet the emerging demand, is just the breakthrough point for the further development of the hydroxypropyl methylcellulose industry. At present, cement mortar, tile cement, asbestos and other refractory coating, gypsum concrete, joint cement, latex putty, latex, electronic materials, refractory mortar, water-based ink and other industries have an inestimable role. The demand for building materials is large. In 2015, the development of building materials industry and the development of land market have a great impact on the supply and demand of HPMC, which is also directly related to its price trend.
Before painting the wall in winter, first apply putty and rubber powder, generally 1-3 times, during which the normal drying time is 1-2 days. However, when applying putty in rainy days, dry cloth shall be used to wipe the water vapor on the wall to keep the wall as dry as possible. At the same time, the drying time of putty shall be extended as much as possible according to the actual weather conditions, generally 2-3 days. Before applying putty and rubber powder, the preparation work shall ensure that the wall surface is solid and flat, and the wall surface shall be cleaned with steel brush or other tools to make the cement wall surface free of floating soil as much as possible. Roll the concrete interface agent once on the wall, try to be even, after it is dry (generally more than 2 hours), you can scrape the putty. The flatness of the wall shall also be measured (with a measuring ruler of more than 2m) to determine the method of puttying. Generally, the wall can be puttied on two sides, which can not only level, but also cover the background color.
Carboxymethylcellulose manufacturers tell us that carboxymethylcellulose is a non-toxic and tasteless flocculent substance, which is mostly milky white powder, and although it is a chemical, it is very mild in nature, and different from cellulose, carboxymethylcellulose can be soluble in water, and it can show a more viscous state in water, because of this Point, we often use carboxymethylcellulose as a viscous agent. According to the cellulose manufacturer, it is precisely because the carboxymethylcellulose is in a viscous state when dissolved in water that it is often used in the oil and natural gas industries, because the use of carboxymethylcellulose in mud can make the well wall hard and reduce water loss, and carboxymethylcellulose can also be used as a well fluid treatment agent in mud, which can effectively reduce various kinds of Pollution of soluble salts. Moreover, the stable carboxymethylcellulose is stable even when it is used as mortar, which can reduce the evaporation of water and ensure the firmness of the object. Because of its wide use, carboxymethylcellulose has become an indispensable chemical substance in modern life.
Generally speaking, the higher the viscosity, the better the water retention effect. However, the higher the viscosity, the higher the molecular weight of HPMC, and the lower its solubility, which has a negative impact on the strength and construction performance of mortar. The higher the viscosity is, the more obvious the thickening effect of mortar is, but it is not proportional. The higher the viscosity is, the higher the viscosity of the wet mortar will be, and it will show a high adhesion to the base and the blade when applied. However, it is not helpful to increase the structural strength of wet mortar itself. During the construction, the anti sagging performance is not obvious. On the contrary, some low viscosity but modified hydroxypropylmethylcellulose have excellent properties to improve the structural strength of wet mortar. The more amount of cellulose ether HPMC is added to wet mixed mortar, the better the water retention performance, and the higher the viscosity, the better the water retention performance. Fineness is also an important performance index of HPMC. The fineness of HPMC also has a certain effect on its water retention. Generally speaking, for HPMC with the same viscosity and different size, the finer the size, the smaller the size. The effect of water conservation is better. In the wet mixed mortar, the addition of cellulose ether HPMC is very low, but it can significantly improve the construction performance of the wet mixed mortar, which is the main additive affecting the construction performance of the mortar. The right choice of HPMC has a great influence on the performance of wet mixed mortar.
3.1 the installation and operation of the instrument shall be carried out according to the instruction manual of the instrument, and the appropriate rotor and rotation speed shall be selected according to the viscosity range of the test article and the provisions of the Pharmacopoeia under the main item of the variety. 3.2 adjust the temperature of constant temperature water according to the measurement under each drug. 3.3 place the test sample in the container specified by the instrument, and measure the deflection angle (α) according to the law after holding for 30 minutes. Turn off the motor and restart the machine for measurement once. The difference between the measured value and the average value shall not exceed ± 3 of the average value. Otherwise, the third measurement shall be made. 3.4 take the average value of the two determinations and calculate according to the formula, that is, the dynamic viscosity of the test article. 3. Record and calculate 4.1 record the model of the rotary viscometer, the rotor number and speed used, the viscometer constant (k value), the measured temperature, and the α value measured each time. 4.2 calculated dynamic viscosity (MPA? S) = K in K α is the viscometer constant α measured with the standard solution of known viscosity is the deflection angle