Desmodur N 3600 wannate HT-600 TPA-100 HDMI Hardener

Desmodur N 3600 wannate HT-600 TPA-100 HDMI Hardener

A hardener is a component of certain types of mixtures. ... In other mixtures a hardener is used as a curing component. A hardener can be either a reactant or a catalyst in the chemical reaction that occurs during the mixing process. A hardener may also be known as an accelerator.

Hardeners are almost always necessary to make an epoxy resin useful for its intended purpose. Without a hardener, epoxies do not achieve anywhere near the impressive mechanical and chemical properties that they would with the hardener. The correct type of hardener must be selected to ensure the epoxy mixture will meet the requirements of the application. Research should always be done on both the resin and the hardener to make sure the final epoxy mixture will perform satisfactorily. Common examples of epoxy hardeners are anhydride-based, amine-based, polyamide, aliphatic and cycloaliphatic.

1.Characterization

Aliphatic polyisocyanate (HDI trimer).

As the hardener component for lightfast polyurethane coating systems.

2.Specification

3.Solubility

Desmodur® N 3600 can be thinned with esters, ketones and aromatic hydrocarbons such as ethyl acetate, butyl acetate, propylacetate, , methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene,xylene, solvent naphtha® 100 and mixtures thereof.

Generally speaking, it has good compatibility with the solvents listed. However, the solutions formed must be tested for their storage stability. Only PU grade solvents should be used (max. 0.05 % water, absence of reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are unsuitable as solvents.

4.Thinnability

Desmodur® N 3600 should not be thinned to below a solids content of 40 %. Prolonged storage of a solution with a lower binder content may result in turbidity and sedimentation.

5.Compatibility

Generally speaking, Desmodur® N 3600 can be mixed with the following products: Aliphatic polyisocyanates like Desmodur® N 100, N 75, N 3200, ultra N 3300, N 3400 and Desmodur® Z 4470; aromatic polyisocyanates like Desmodur® L/ultra L, HL and IL/ultra IL; polyester polyols such as Desmophen® 670 and polyacrylates. However, the compatibility of the combinations used should be tested.

Desmodur® N 3600 is not compatible with branched polyester polyols such as Desmophen® 651 or poly polyols such as Desmophen® 1380 BT.

6.Properties

Desmodur® N 3600 is used primarily as the hardener component for lightfast two-component polyurethane coatings with high resistance to chemicals and weathering, very good gloss retention and outstanding mechanical properties. Preferred co-reactants are polyacrylate or polyester polyols.

7.Applications

The main applications for systems based on Desmodur® N 3600 are air- and force-drying coatings for automotive OEM, automotive refinishing, transportation, industrial finishing and plastics.

On account of its low viscosity, Desmodur® N 3600 is particularly suitable for the formulation of high-solids coatings and can also be used as the hardener for aqueous two-component polyurethane coatings.

8.Storage

- Storage in original sealed Covestro container.

- Recommended storage temperature: 10 - 30 °C.

- Protect from moisture, heat and foreign material.

General information: The product is sensitive to moisture and should therefore be stored in tightly sealed containers. Storage at elevated temperatures will lead to an increase in viscosity and a reduction of the NCO content.