German technical background VOK-4500 Adhesion promoter For water-based and solvent based systems replaces BYK-4500

German technical background VOK?- AP 4500 adhesion promoter

Adhesion promoter for water-based and solvent based systems.

Product Information

Chemical composition: solution of high molecular weight block copolymer

Typical Physicochemical Data

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

Amine value: 28 mg KOH/g

Density (20 ℃): 1.00 g/ml

Non volatile matter (20 minutes, 150 ℃): 40%

Solvent: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate

Flash point: 103 ℃

application area 

Coating industry

Product features and advantages

The additive without organic silicon is attracted by the coating interface, and its role as an adhesion promoter is mainly due to special adhesion groups. In water-based systems, it can improve adhesion, especially wet adhesion on harsh substrates, such as aged coatings, oxidized steel, galvanized steel, and polar plastics, such as ABS and glass fiber reinforced polyester. It also increases early water resistance. Applicable systems include emulsion paint, alkyd lotion, mixed system and water diluted alkyd resin system.

In the solvent based system (thermoplastic acrylate, epoxy ester, melamine resin cross-linking baking system), improve the adhesion on oxidized steel and galvanized steel. It has no adverse effect on hardness, flexibility, luster and yellowing tendency. In some cases, the adhesion of subsequent coatings can also be improved.

The additive is stable even at high baking temperature (above 280 ℃ for a short time) and will not cause yellowing.