German Technical Background VOK-166 Wetting Dispersant Reduce the Viscosity of Abrasive Replaces BYK-166

German technical background VOK ®- Disper 166 Wetting Dispersant

VOK ®- Disper 166 is a high molecular weight wetting and dispersing agent used for dispersing organic pigments in solvent based coatings.

Product Information

Chemical composition

Modified polyurethane solution

Typical Physicochemical Data

The data given in this data page are only typical values, not technical indicators of the product.

Amine value: 20 mg KOH/g

Density (20 ° C): 0.97 g/ml

Non volatile matter (20 min., 150 ° C): 29.5%

Solvent: butyl acetate/propylene glycol methyl ether acetate

Flash point: 24 ° C

Special reminder

The post-treatment of some organic pigments will have a negative impact on the performance of the additive. In this case, the same type of untreated pigment can be used.

Application field

Coating industry

Features and Benefits

VOK ®- Disper 166 makes the pigment de flocculate and stabilize through the steric hindrance, thus preventing the pigment from co flocculating, so as to obtain the color without floating color and blooming in the system containing multiple pigments. The flocculating property of the additive can improve the luster, color strength, transparency or hiding power, and reduce the viscosity of the abrasive.

Recommended use

This additive is especially recommended for automotive coatings and is suitable for pigments that are difficult to disperse (such as DPP type).

Recommended dosage

The amount of additives (purchase form) is based on:

Titanium dioxide: 5-6%

Organic pigment: 50-80%

The above recommended dosage is for reference, and the appropriate dosage shall be determined through a series of tests.

Adding method and processing guidance

Wetting dispersants should normally be added to the abrasive, which is the only way to make them fully effective.

Pre mix the resin and solvent components in the abrasive, and then slowly add the auxiliary agent under stirring. The pigment can be added only after the auxiliary agent is completely dispersed and uniform. VOK can be used simultaneously in baking paint ®- 331 to improve leveling and prevent Bernard vortex.