Properties of Hydroxypropyl Methyl Cellulose
As Hydroxypropyl Methyl Cellulose is also a non-ionic ether, so it will not be ionized in the medium of water, unlike other ionic cellulose ethers, such as Sodium carboxymethyl cellulose, which shall react with the metal ions to precipitate in the solution. Adding a certain amount of salt can more economically achieve thickening effects in the application. so in some applications, rather a mixture of cellulose ethers and salts, rather than ether solution of higher concentration to achieve thickening effect . So in some applications, a mixture of cellulose ethers and salts, rather than the ether solution of higher concentration can be used to achieve thickening effect .
Acid and Alkali Resistance of Hydroxypropyl Methyl Cellulose
In general, Hydroxypropyl Methyl Cellulose is stable in acids and bases. When the pH value is between 2 and 12, it will not be affected. It can withstand a certain amount of concentrated acid, but the concentrated acid may have the effect of reducing the viscosity. Bases such as caustic soda, caustic potash and lime water, have no effect on it.
Compatibility of Hydroxypropyl Methyl Cellulose
Hydroxypropyl Methyl Cellulose solution can be mixed with water-soluble polymers to form a uniform and transparent solution of higher viscosity. These polymers include polyethylene glycol, polyvinyl acetate, silicone, poly-methyl vinyl siloxane and hydroxy ethyl cellulose, and methyl cellulose. Natural polymers such as Arabic gum, locust bean gum, karaya gum, xanthan gum, also have good compatibility with its solution.
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