BYK 163

On-Product Information of BYK 163

Chemical composition

Modified polyurethane solution

Typical materialized data

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

Amine value: 10 mgkoh/g

Density (20° c): 0.99 g / ml

Non-volatile fraction (20 min, 150 ° c): 45%

Solvent: Xylene / butyl acetate / propylene glycol methyl ether acetate 3 / 1 / 1

Flash point: 28° c

Storage and transportation

Stratification or turbidity May occur at temperatures below 0 ° c, heated to 20 ° c and fully mixed. 

Special attention

Surface treatment of some organic pigments has adverse effects on the effectiveness of this wetting dispersant.

In this case, the same type of untreated pigment can be tried out. When used in coil coatings, the interaction between the cationic additives and the acid catalyst shall be considered.

Free acids or epoxy- closed acids are more applicable than amine-closed acids. This problem can be avoided by using the disperbyk-170 series.

Application Message of BYK 163

Features and advantages

The high molecular weight aid unfloccles and stabilizes the pigment by steric hindrance.

DISPERBYK-163 provides the same charge to the pigment particles.

The resulting repulsive force and position resistance stability can effectively avoid the possible common flocculation, so that the multiple pigment system will not produce floating color and flowers.

The unflocculation performance of the aid can increase the luster, color strength, transparency and covering force of the coating, while reducing the viscosity of the abrasive.

Recommended application

DISPERBYK-163 has broad compatibility and can be used in various solvent formulations. It can also be used for the late remediation of problem coatings. For some new applications, newer additives such as disperbyk-2163 and dISPERBYK-2164 are recommended.

Recommended dosage

Auxiliarydosage (purchased)based onpigment:

Inorganic pigment: 15-20%

Titanium dioxide: 4-5%

Organic pigments: 30-60%

Carbon black: 80-100%

The above data are the empirical dosage, and the optimal dosage needs to be determined through a series of tests.

Add method and processing instruction

For the optimal performance, the additives should be added to the abrasive, and then the pigment. 

First, the arbrasive resin and solvent components are premixed, and then the additives is slowly added under constant stirring. Pigments cannot be added until the additives are well mixed. 

The defective coating can be remedied by postaddition, which needs to be added slowly under high shear force conditions.