ROLFLEX® BK 40

ROLFLEX® BK 40 by Lamberti acts as a crosslinking agent in coating pastes. It is a non-ionic/slightly anionic, aliphatic blocked polyurethane free of pyrrolidone, formaldeyde, ketoxime and pyrazole derivative. It improves fastness to washing, rubbing and dry cleaning. It can be formulated with waterborne polyurethane or acrylic resins to obtain compound with long pot-life.

• It doesn't cause yellowing due to light, temperature, or atmospheric agents exposure.
• It can be applied by padding, coating or printing.
• It is a booster for water-repellent treatments.
• The recommended dosage level is 5 to 10% for coating paste and for digital pigment printing 10 to 50 g/l.
• ROLFLEX® BK 40 has a shelf life of 12 months.