Bayer Desmodur DN-aqueous solvent-free polyisocyanate

Desmodur DN-aqueous solvent-free polyisocyanate (1) Type: Low volatile aliphatic polyisocyanates. (2) forms: solvent-free light yellow liquid viscosity. (3) use of Desmodur DN is a solvent-free aqueous emulsion type polyisocyanate, which can be used as many intermediate polymer emulsion PH value crosslinker, such as polyurethane, polyvinyl acetate, acrylic and synthetic rubber latex. This cross-linking can improve the performance of the adhesive to heat, water, plasticizers and solvents. (4) Indicators: NCO content 21.8 ± 0.5% (DIN EN ISO 11909, Annex A) Viscosity (23 ℃) 1,250 ± 300mPas (DIN EN ISO 3219 A.3 Rotation) (5) Other data * solids content of about 100% Density (20 ℃, PIW51757) about 1.15g / cm3 Lightning (DIN51757) about 180 ℃ * data makes use of standard products. (6) Applications: To ensure Desmodur DN can be sufficiently dispersed in the adhesive should be mechanically stirred. Not stirred by hand to form a uniform solution, especially when low viscosity of the adhesive dispersion, stir it becomes particularly important. Insufficient stirring easy to form a gel particle in a binder. After addition of Desmodur DN, the two-component adhesive must be used in the applicable period. The length of the applicable period concerned not only with the content of the polymer, but also with the other components (such as resins, thickeners, plasticizers, etc.). After a suitable period (usually several hours), the gel state is not always present. It can be reflected by measuring the heat and water resistance. Desmodur? DN added in an amount of 3% -10% 100 parts by weight of the binder dispersion of (polymer content of 40% -60%) (7) Packing: 60 kilos of metal containers (8) Storage at 10-25 ℃ sealed original save, stable for six months. The product is very sensitive to moisture, water reaction to form carbon dioxide and insoluble urea. So containers shall at all times remain sealed. Should avoid moisture reacting with moisture, solvents and moisture in the container. Produce carbon dioxide will build pressure, thereby increasing their risk. (9) Disposal residue incinerated according to local regulations. Uncrosslinked residue should pay special attention and note the EWC number NO.080406. The residue after crosslinking is marked with NO.080102. (10) safe before removing the pollution can not be thrown off the tag of dangerous goods. Polyisocyanates products require special attention to safety of their operations. The high sensitivity of guinea pig tests showed that the product is easy to make skin allergies. However, long-term results aliphatic poly isocyanates and easy experience and conditions of use show that their risk of skin allergies should be minimal. Shall comply with the operational safety of the product description. Its content involves marking, transportation, storage, handling, product safety and ecology