German technical background VOK-4509 Adhesion promoter For solvent-based and water-based systems replaces BYK-4509

German technical background VOK®-AP 4509 adhesion promoter

Adhesion promoter for metal substrates for solvent-based and water-based systems

Product information

chemical composition 

Salt of polymer containing acid group

Typical physical and chemical data

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

Amine value: 29 mg KOH/g

Acid value: 29 mg KOH/g

Density (20 ℃): 1.11 g/ml

Non-volatile matter (10 minutes, 150 ℃): 80%

Solvent: propylene glycol methyl ether

Flash point: 45 ℃

Application information

Coating industry

Features and advantages

The additive is an adhesion promoter without organic silicon and contains neutralized acid groups. The additive has good affinity, especially for metal substrate, and can improve the adhesion to steel, galvanized steel, aluminum and glass. German technical background VOK®- AP 4509 can react with melamine resin and polyisocyanate and cross into the resin system. This additive is compatible with most base materials and is the ideal choice for general additives. German technical background VOK®- AP 4509 can be used for water-based and solvent-based coatings, especially recommended for baking systems and two-component systems. This additive will not affect the curing rate of solvent-based acid catalytic system. When used in water-based systems, German technical background  VOK®- AP 4509 shows good pH stability.