MATECEL® is classified into pure and modified grades. Pure grades are also divided into HPMC(Hydroxypropyl Methyl Cellulose) and HEMC(Hydroxyethyl Methyl Cellulose).

PMK-150ZS(HPMC, Degree of subsituion K, Viscosity 150000mPa·s, Delayed Solubility)

GMK grades are finely modified to improve the rheological properties of cellulose ethers in accordance with various application requirements such as additional thickening, betier workability, less stickiness, longer open time, etc.

Modified grades are especially produced through chemical reactions, physical blending of organic or inorganic additives. The viscosity range varies from under 400mPa·s to over 200,000mPa·s.

SOLUBILITY

Dissolution of MATECEL®

When it comes to water solubility levels and speed, the general dissolution mechanism of MATECEL® is shown in the graph below.

Non-surface treated MATECEL®

The viscosity measuring of non-surface treated MATECEL® is impossible in cold water due to lump formations. The retardation time of surface-treated MATECEL® Approximates to about 20 minutes at HP 7. However, the higher the PH of the solution is, the shorter the retardation time will be.

The effect of pH on MATECEL® dissolving times

The viscosity development time is dependent upon the pH of the solution fie surface-treated grades. The higher the pH of the solutions is, the shorter the retardation time will be. For paint applications, long-regarded grades are more suitable because of the high pH conditions (CaCO₃,ammonia,etc.) of the applications.