HEC (Hydroxyethyl cellulose）
Application Properties
1. High thickening efficiency and wide range of viscosity grades, to get any desired thickening efficiency.
2. Good compatibility with most inorganic salts and a wide range of gum and resin.
3. Anti-biodegradable HEC powder products have excellent stability, to ensure a nice shelf life for paint.
4. Good protective colloid activity, to prevent coagulation of solid particles in the coating.
5. Less insoluble matter, clear and transparent aqueous solution.
6. Small viscosity fluctuation.
7. High purity, low moisture content, low ash content.
For the preparation of aqueous solutions containing HEC, the following recommended procedure should be followed:
1. Begin by agitating water thoroughly to ensure uniformity in the solution. Gradually introduce HEC into the agitated water to prevent the formation of lumps.
2. Continue adding HEC powder until it is completely incorporated into the water, making sure to complete this step before any notable increase in solution viscosity occurs.
3. Maintain continuous agitation until all the added HEC is fully dissolved. To facilitate the dissolution of hydroxyethyl cellulose HEC, consider employing one of the following methods:
a. Wet hydroxyethyl cellulose HEC with a water-compatible alcohol before introducing it into the water.
b. Blend HEC with another powdered substance that is either immiscible with water or exhibits low solubility in water.
Advantages and Features
Anti- biodegradation performance
The use of an excellent HEC thickener with anti-biodegradable properties minimizes viscosity loss.
The solution properties l
HEC hydration time counts from the initial wetting to a moment when the solution starts to become viscous. Hydration time could be varied to meet a special requirement. HEC hydration time, apparently affected by the pH value.Typically ranges from 4 to 25 minutes.
The solution properties ll
In the actual conditions of industrial applications, shear rate is an important factor to consider when the amount of hydroxyethyl cellulose HEC required to achieve a certain viscosity. Generallyspeaking, the higher the shear rate, the lower the viscosity.
The solution properties lll
The most important property of hydroxyethyl cellulose powder is that it acts as a thickener, in creasing the viscosity of the liquid,and its thickening depends on its concentration . In addition, the effect of different viscosity grade on the thickening property can alsobe clearly seen, under the other constant parameters, the viscosity of HEC thickener increases with the increase of viscosity grade.
