EFKA 3835 An isocyanate-terminated polysiloxane Efka Additives Antiblocking agent Flow / Levelling agent >> Silicone Slip control >> Silicone Polyurethane Coatings >> Solventborne Coatings >> Solvent-Free/ High-Solids Properties: EFKA-3835 is an isocyanate-terminated polysiloxane designed to crosslink with hydroxyl- or carboxyl groups, in order to give permanent slip and anti-blocking performance. It is compatible with most polyisocyanates e.g. Desmodur® N, L, IL, HL and similar products. EFKA-3835 exhibits diminished compatibility with polyisocyanates like Desmodur® N 3390. Application: EFKA-3835 is a cross-linking additive for all kinds of polyurethane coatings. It should be added to the hardener (polyisocyanate solution). Compared with common organically modified polysiloxanes such as our 3000 series, EFKA-3835 reacts to form part of the film and gives longterm slip and anti blocking properties. EFKA-3835 results in higher slip and anti-blocking performance compared with EFKA-3886 and EFKA-3888. Addition: 1 - 2% calculated on the polyol component, which should be added to the hardener component. The NCO-value of EFKA-3835 of 6.3 - 7.3% (based on solids) should be taken isocyanate-terminated polysiloxane designed to crosslink with hydroxyl- or carboxyl groups, in order to give permanent slip and anti-blocking performance. It is compatible with most polyisocyanates. Should be added to the hardener (polyisocyanate solution). Reacts to form part of the film and gives longterm slip and anti blocking properties. Recommended usage level: 1 - 2% calculated on the polyol component, which should be added to the hardener component. The NCO-value of EFKA-3835 of 6.3 - 7.3% (based on solids) should be taken into account in the isocyanate-hydroxyl calculation.