| The product, Hydroxyethyl Cellulose (HEC), is a free flowing and white or light yellow powder, whose screen residue after sifting through the 40-meshes sieve is smaller than 1%. the softening temperature of the product is 135℃--140℃ and apparent density 0.4-0.7g/ml . It can be dissolved in either could or hot water and its viscosity varies little with its PH over the range of 2-12. The HEC through surface treatment can be dispersed in cold water and free from agglomeration, but the dissolution spend more time, namely , more than 30 minutes. If it is heated up or its PH is heightened to 8 above, it is dissolved speedily. The viscosity of the water-solution of HEC decreases with an increase of its temperature and it comes back when the temperature returns to original position, that is to say, it is freeze-thaw-stable. No deposition happens when the aqueous solution of HEC is getting hot and even seething .it is compatible with a huge array of other water-soluble polymers, which are applied as surfactants, and salts. |
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