OPTAPIX C 25 G LIANT COLLE DEFLOCULENTE

OPTAPIX C 25 G

Binder for glazes and engobes

Purified sodium carboxymethylcellulose

Appearance:yellowish granulate

Moisture content:8 % maximum

Solubility:readily water-soluble

Bulk density: approx. 600 g/l

pH (1 %): approx. 7

CMC content dry:approx. 99 %

Viscosity(2 %, 25 °C):approx. 130 mPas

Labelling according to EC directives: not relevant

Safety data:12 months when stored properly and drybags of 25 kg

OPTAPIX C types differ by their degrees of polymerization and hence the viscosities of theiraqueous solutions.

OPTAPIX C types are used in glazes and engobes as viscosity adjusting, non-foaming bindingagents.

They improve the abrasion resistance, give glazes or engobes a good fit and prevent running.

Sodium CMC being a polyelectrolyte, the low viscosity, i.e. short-chain types like OPTAPIXC 12 G / C 25 G, have a deflocculating effect besides their binding property.

As far as the sodium CMC types with a medium degree of polymerization, such as OPTAPIXC 50 G, are concerned their electrolytic effect is to a large extent compensated by their increasedintrinsic viscosity; they, therefore, have a rather neutral effect on the viscosity of the glaze slip,at the usual addition quantities.

High polymer types such as OPTAPIX C 200 G / C 1000 G have a thickening effect on the glaze slip.

In general, an increasing degree of polymerization will lead to better binding properties andto an improved dehydration, this means a longer drying time.

Further advantages of OPTAPIX C types are their plasticizing effect on ceramic bodies andan improved dry breaking strength.

The optimum addition quantity ranges between 0.05 and 1.0 % and depends on the individualworking conditions.

They are either milled with the glaze constituents or added as aqueousstock solution.

The granulate form improves their water-solubility.

Note:Solutions of OPTAPIX C are relatively resistant to decomposition.

However, if they are to bestored over longer periods, they should be preserved with one of our NOVAL-types.