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HPMC The Aqueous Solution Was Neutral
Nov 01, 2017

HPMC The aqueous solution was neutral

Carboxymethyl cellulose is a tasteless five-pronged white powder with stable performance, soluble in water, neutral or alkaline transparent viscous liquid, soluble in water and soluble in other water Plastic and resin, can not be dissolved in organic solvents such as ethanol. In the oil, natural gas drilling, drilling works in the following applications:

1, if the mud containing carboxymethyl cellulose can make the formation of thin and dry shaft, a lower permeability of the cake, reduce water loss.

2, the addition of carboxymethyl cellulose in the mud, the drill can be a lower initial shear force, so that the gas wrapped in the mud is easy to be released, and can be quickly discharged into the mud pit.

3, mud and other suspension of the same dispersion, the existence of a certain period, adding carboxymethyl cellulose can make it stable, so that the existence of extended.

4, if the mud containing carboxymethyl cellulose, the mold is very small, therefore, do not need to maintain a high PH value, do not need to use preservatives.

5, the use of carboxymethyl cellulose-containing drilling mud washing fluid treatment agent, which can effectively avoid a variety of soluble salts pollution.

6, containing carboxymethyl cellulose mud, with good stability, even if the temperature above 150 ℃ can still reduce water loss. Cellulose ether HPMC in the cement mortar and gypsum-based slurry, mainly from the role of water retention and thickening, can effectively improve the pulp adhesion and anti-dullness.

Air temperature, temperature and wind pressure and other factors will affect the cement mortar and gypsum-based products in the evaporation rate of water. So in different seasons, add the same amount of HPMC product water retention effect there are some differences. In the specific construction can increase or decrease the amount of HPMC, adjust the water retention effect of the slurry. Methyl cellulose ether under high temperature water retention, is an important indicator of the quality of methyl cellulose ether. Excellent HPMC series of products can effectively solve the problem of water retention at high temperatures. In the hot season, especially in hot and dry areas and Xiangyang side of the thin layer of construction, the need for high-quality HPMC to improve the water retention of the slurry. High-quality HPMCs are very homogeneous, and their methoxy and hydroxypropoxy groups are evenly distributed along the cellulose chain to improve the ability of hydroxyl groups and ether bonds to form hydrogen bonds with water , So that free water into a combination of water, so as to effectively control the evaporation of water caused by high temperature weather, to achieve high water retention.

High-quality cellulose HPMC can be uniformly and effectively dispersed in the cement mortar and gypsum-based products, and wrapped all the solid particles, and the formation of a layer of wetting film, the water in the base for a long time to gradually release, and inorganic glue Coagulation material hydration reaction, so as to ensure the bonding strength of materials and compressive strength. Therefore, in the high temperature summer construction, in order to achieve water retention effect, according to the formula enough to add high-quality HPMC products, otherwise, there will be too fast drying caused by insufficient hydration, reduced strength, cracking, hollowing and shedding quality Problem, but also increase the difficulty of construction workers. And with the temperature drop, you can gradually increase the amount of HPMC added, and can achieve the same water retention effect.

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