The CMC Story
WATER SOLUBLE...
9 MINUTES, 10 SECONDS-First drop of water percolates the raw starch-sand mixture. Cloudy appearance of water in this vessel is caused by immediate dispersion of starch.
ZERO H O U R - L e f t : 10% CMC, 90% sand; Right: 10% raw starch, 90% sand. An equal amount of water was added to each vessel. Water penetrates the raw-starch mixture instantaneously.
What can CMC The above demonstration dramatizes the versatility of Hercules® CMC sodium carboxymethylcellulose. Add CMC to water in the right percentage, stir and CMC dissolves completely. Other percentages will change the viscosity to any desired degree all the way to a complete gel. Or—as shown above—dry CMC can act as a water barrier.
Hercules offers the widest range of CMC's on the market, insuring that there is a right grade for you Whether you require a thixotropic type or nonthixo tropic, whether you require a variation in viscosity degree of substitution, particle size, solubility—what ever your need, Hercules has a CMC grade for you The superiority of CMC to other water-soluble
yet a WATER BARRIER
3 9 MINUTES, 2 0 SECONDS-By this time, starch-sand mixture has allowed almost all of the water to escape. CMC-sand mixture still completely resists penetration of water.
5 3 MINUTES, 15 SECONDS-The last of the water has penetrated the starch-sand mixture. The CMC-sand mixture still had not permitted a drop to pass after 72 hours when test was discontinued.
do for you ? & polymers in many uses has resulted in an ever increasing number of applications for this material. Perhaps it holds the key to the solution of one of your own problems. Full technical data on CMC and assistance in evaluating its usefulness in your formulation are available from Hercules. Why not write for information on how Hercules CMC can help you.
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