Blocked, aliphatic polyisocyanate based on HDI.
In combination with Desmophen® grades to formulate lightfast,one-component polyurethane stoving coatings; as an additive in conventional stoving systems to improve flexibility and adhesion.
| Supplier | |
|---|---|
| Additive Classification | Curing Agent |
| Industry | Adhesives, Automotive & Transportation, Building & Construction, Electrical & Electronics, HI&I Care, Home Renovation, Marine Vessels, Paints & Coatings, Petrochemical, Wind Energy |
Generally speaking, Desmodur® BL 3175 SN has good compatibility with the solvents listed. However, the solutions formed must be tested for their storage stability. Desmodur® BL 3175 SN can be thinned to a solids content of 40 % by wt. with ketones, esters, ether esters and aromatics. It can be thinned to a solids content of 60 % by wt. with mixtures of higher boiling aromatics such as solvent naphtha® 100 and 150. Aliphatic hydrocarbons cannot be used.
Given equivalent crosslinking (NCO/OH = 1.0), Desmodur® BL 3175 SN is generally compatible with Desmophen® 651, 670, 680, 690, RD 181, A 160, various polyacrylates and with Desmophen®
T 1665. It can also be combined with various plasticisers, e.g. phosphoric acid, sulphonic acid, adipic acid and phthalic acid esters. The combinations should always be tested for their
compatibility
Desmodur® BL 3175 SN can be used as the hardener in colorfast and weather-stable, one-component polyurethane coatings. The stoving temperature can be significantly reduced by the addition of a catalyst, e.g. dibutyltin dilaurate (DBTL), without reducing the storage stability.The product is used in high-grade industrial finishes (electrical appliances, small
components, can coatings, coil coatings, etc.) and in primer surfacers and topcoats for automative finishing. Desmodur® BL 3175 SN can also be used as an additive in conventional stoving systems to improve the flexibility and adhesion.
Brand: COVESTRO
Form supplied：approx. 60 % in butyl acetate
NCO content：10.5 ± 0.5 %
Non-volatile content：60.0 ± 2.0 %
Viscosity (23 °C)：2,200 ± 1,000 mPa·s
Iodine color value：≤ 4
Monomeric TDI + HDI：< 0.5%
Brand: COVESTRO
Form supplied：approx. 51 % in butyl acetate
NCO content：7.4 ± 0.2 %
Non-volatile content(0.2 g / 60 min / 120°C)：51.0 ± 2.0 %
Viscosity (23 °C)：250 ± 75 mPa·s
Color value (Iod)：≤ 1.0
Monomeric content：< 0.50%
Brand: COVESTRO
Form supplied：approx. 51 % in butyl acetate
NCO content：8.0 ± 0.3 %
Non-volatile content(0.2 g / 60 min / 120°C)：51.0 ± 2.0 %
Viscosity (23 °C)：1,300 ± 450 mPa·s
Color value (Iod)：≤ 1.0
Monomeric content：< 0.10%
