This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not be construed as guaranteeing specific properties or suitability for a particular application
ORGAL® PR 667 is a styrene acrylic copolymer emulsion with very fine particles, developed as a primer for mineral substrates or formulations for impregnating wood stains. Such low particle size emulsions are also referred to as “Hydrosols”.
ORGAL® PR 667 is supplied as a low-viscosity emulsion with a bluish to clear appearance. The emulsion dries to give a slightly tacky, elastic, and clear film. Due to the very small particle size, it has excellent penetration and adhesion properties.
| Property | Value |
|---|---|
| Appearance | Opal emulsion |
| Solid Content | 34% ± 1 |
| Viscosity (Brookfield LVT 1/60) | 100 cps max |
| pH | 8.0 – 8.5 |
| MFFT (Minimum Film Formation Temperature) | 0°C |
| Tg (Glass Transition Temperature) | 1°C |
| Storage Stability | Protect from freezing |
ORGAL® PR 667, with its extremely small particle size, is especially suitable for the production of aqueous high-penetration primers for substrates like plaster, concrete, and asbestos cement. The penetration power increases with decreasing solid contents, while the reinforcing effect increases with the dry binder amount. An optimum dilution should be determined by pretests. Small quantities of surfactants enhance the penetration power. The product is highly resistant to alkaline media, making it compatible with gypsum and gypsum board.
