German technical background VOK-2164 Wetting dispersant Improve luster and color intensity replaces BYK-2164

German technical background VOK ®- Disper 2164 Wetting Dispersant

VOK ®- Disper 2164 is a wetting and dispersing agent for solvent based coatings and pigment concentrates. It's VOK ®- Dispatch 164 and VOK ®- Disper 167 is more economical.

Product Information

Chemical composition

Modified polyurethane solution

Typical Physicochemical Data The data given on this data page are only typical values, not technical indicators of the product.

Amine value: 14 mg KOH/g

Density (20 ° C): 1.03 g/ml

Non volatile matter (20 minutes, 150 ° C): 60%

Solvent: butyl acetate/propylene glycol methyl ether acetate 2/3

Flash point: 33 ° 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 may be used When applied to coil coatings, the interaction between the cationic promoter and acid catalyst must be considered. Free acid or epoxy blocked acid is more suitable than amine blocked acid. This problem can be solved by using VOK ®- Disper 170 series additives.

The deflocculating pigments have a stronger settling tendency, especially those inorganic pigments with a large proportion. Use of liquid rheological aids such as VOK in the grinding phase ®- 410 or VOK ®- 430 This problem can be avoided.

Application field

Coating industry

Features and Benefits

The additive makes the pigment deflocculate and stable through steric hindrance, and it also makes the pigment particles have the same charge. The resulting repulsive effect and steric stability prevent the pigment from co flocculation, so that the color without floating and blooming problems can be obtained in the system containing multiple pigments.

The flocculating property of the additive can improve the luster, color strength, transparency and hiding power, and reduce the viscosity of the abrasive.

Recommended use

Because of its high solid content and no aromatic solvent, the additive should be used preferentially in the new application formula. It is VOK in solvent based pigment concentrates and coatings ®- DF 164 and VOK ®- Alternative to DF 167.

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

Inorganic pigment: 12-15%

Titanium dioxide: 3-4%

Organic pigment: 20-35%

Carbon black: 60-70%

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

Adding method and processing guidance

In order to obtain good performance, additives must be added to the grinding material first, and then the pigment.

Premix the resin and solvent components in the abrasive, and then slowly add the auxiliary agent in the state of continuous stirring. Do not add pigments when the auxiliaries have not been completely dispersed evenly.

When it is used for post addition (to remedy defective batches), the additive should be added slowly under high shear force.