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6. A simple test method for the ash content of cellulose ether: weigh one to two grams of cellulose ether, ignite it with a lighter, weigh the ash residue left by the combustion of cellulose ether, and when the ash residue / cellulose ether is ≥ 5%, the quality of cellulose ether is basically unqualified. (there are sometimes errors in this method. First, the manufacturer compounded the products suitable for specific customers for customers before leaving the factory; second, the agents or manufacturers added flammable substances with low ash content when adulterating)

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white powder hpmc for wall putty


  • Tylos HPMC - High-Performance Hydroxypropyl Methylcellulose Solutions
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  • In recent studies we have investigated the water retention behavior of hydroxyethyl cellulose (HEC) and carboxymethyl hydroxyethyl cellulose (CMHEC) in oil well cement, respectively. We found that the working mechanism of HEC relies on a dual effect, namely its enormous intramolecular water sorption (binding) capacity and a concentration dependent formation of hydrocolloidal associated polymer networks [23]. Contrary to this, the working mechanism of CMHEC changes with dosage. At low dosages (up to ~ 0.3% by weight of cement), adsorption presents the predominant mode of action, whereas above a certain threshold concentration (the “overlapping” concentration), formation of associated polymer networks is responsible for its effectiveness [24].

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