WorléePur VP Si 2031

Application and Properties
WorléePur VP-Si 2031 is a silane-modified polyurethane. It is suitable for the formulation of clear- and topcoats, forced drying or at room temperature. The formulation of stoving enamels is also possible. In any case, paints based on WorléePur VP Si 2031 dry very quickly and achieve very good resistance properties within shortest time.

For optimal crosslinking a catalyst is needed. For this purpose acids are suitable. Especially good results are achieved with WorléeAdd VP 2100, Nacure 5076 (King Industries), or Nacure 4000 (King Industries). In stove enamels blocked catalysts can be used.

WorléePur VP Si 2031 is compatible with amino resins. Due to the large number of products available on the market, this compatibility should be checked before. Polyurethane / melamine resin ratios of 4 : 1 to 3 : 1 are recommended, when melamine resins are used. The optimum stoving conditions are between 20 min 130 °C and 10 min at 160 °C.

To controll the rheological properties, polyurea-thixotropic binders as e. g. WorléeThix A 1420 or WorléeThix A 2126 are suitable. These are thixotropic binders based on OH functional acrylates. When used as a combination partner, these OH groups need not be crosslinked. The resistance properties are not negatively affected by usual additives.

Catalyst
2.0 – 4 % WorléeAdd VP 2100
1.0 – 2 % Nacure 4000
1.0 – 2 % Nacure 5076
each on solid binder.
In very highly filled systems (e. g. primers) the needed catalyst quantity can be higher.

Handling and Storage
Preferably waterfree solvents should be used. WorléePur VP Si 2031 is delivered in an inflammable solvent. Therefore protect from heat and keep away from open fire. After longer storage WorléePur VP Si 2031 tends to crystallisation. This crystallisation disappears after heating at approx. 50 °C and has no influence on the product properties. In some systems the use of molecular sieves is recommended.