KOBOND™ 4023 — Epoxy Phosphate Ester Adhesion Promoter

Product Overview

KOBOND™ 4023 promotes interaction between coatings and difficult metal surfaces. Its high-molecular-weight structure contains multiple anchoring groups, while hydroxyl functionality can participate in crosslinking with suitable resins. The supplied TDS describes adhesion, flexibility, impact resistance and color stability during high-temperature baking.

Key Features

• Promotes adhesion to aluminum, zinc, stainless steel and plated metal surfaces.
• Hydroxyl functionality can participate in suitable resin crosslinking.
• Can improve film flexibility and impact resistance.
• Supports color stability during baking, as described in the TDS.

Physical Properties

Selected values from the original TDS. Refer to that document for conditions and whether values are typical or specification limits.

Typical Applications

• Acrylic/melamine, alkyd/melamine and polyester/melamine baking coatings.
• Two-component polyurethane coatings.
• Coil coatings and other industrial coatings on aluminum, zinc, stainless steel and plated metals.

Technical Considerations

The TDS recommends 0.1–5.0% based on the total formulation. Determine the optimum level through laboratory trials. This product is not recommended for conventional air-drying coating systems.

Reported properties are typical, not specifications. Store tightly closed in a cool, dry, ventilated place. The stated unopened shelf life is 24 months from manufacture. Consult the current SDS before handling.

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