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Shanghai Na Long Tech Co., Ltd

Curing Agent for Waterborne two-component PU Coating

Curing Agent for Waterborne two-component PU Coating

Payment Type: L/C,T/T
Incoterm: FOB,CIF
Min. Order: 10 Barrel/Barrels
Delivery Time: 14 Days

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Basic Info

    Model No.: YL-W6500

    Appearance: Liquid

    Application: Appliance Paint, Building Coating, Car Paint, Furniture Paint, Paper Coating, Plastic Coating, Rubber Coating

    Property: Water-Solution

    Auxiliary System: Water Type Coating Auxiliary Agent

    Usage Stage: Reaction Stage

Additional Info

    Packaging: 200L barrel

    Transportation: Ocean

Product Description

YL-W6500 is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate(HMDI); it is used as curing agent of waterborne two-component polyurethane coating system.



Water white or yellowish transparent liquid

Isocyanate content /%


HDI monomer content /%


Viscosity /(cps, 25℃)


Other data

The following are typical features of YL-W6600 and should not be considered as product specifications.


Typical data

Average mol wt

About 565

Relative density /g/cm325℃)


Flash point /

About 165


Yl-W6500 is compatible with ester, ether ester, xylene and naphtha 100 solvents; however, solubility and compatibility should be tested for each solvent. Only polyurethane grade solvents should be used. The water content shall not exceed 0.05%.


Yl-W6500 is a crosslinking agent suitable for water-based system. Although the hydrophilicity of the curing agent is relatively weak, it is easy to emulsify and disperse in aqueous phase due to its very low viscosity; The coating prepared with this product has good matting property and physical and chemical properties, so it is recommended to be used in semi gloss or flat waterborne coating system.

Yl-W6500 can also be used as crosslinking agent of water-borne polyols and crosslinking agent of most neutral water-borne polymer dispersions (such as polyurethane, polyvinyl acetate resin, polyacrylate and synthetic rubber dispersion) to improve their properties. After adding YL-W6500, the two-component coating to be used must be used within the activation period. The activation period is affected by polymer content and other components (e.g. resins, thickeners, plasticizers, etc.). In many dispersions, the end point of activation period (usually several hours) does not show gelation.

Packaging and storage

Package specification

200L small mouth iron barrel, other packaging specifications can also be agreed


Please keep it away from light, cool and dry place. The storage temperature should be 5~30 ℃ to keep the package intact and sealed well. The shelf life of this product is 6 months from the date of production. It is recommended to evaluate the performance before use after more than 6 months.


This product contains polyisocyanate, so you should be very careful when using it. Skin contact with this product may cause allergic reaction; all YL-W series products are very sensitive to moisture and react with water to form carbon dioxide and insoluble urea. Therefore, the packaging container must be well sealed to avoid reaction with moisture, solvent and moisture in the container. The carbon dioxide produced will increase the pressure of the container, thus increasing its risk.

Looking for ideal HMDI Based Polyisocyanate Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Cross-linker for Waterborne Coating are quality guaranteed. We are China Origin Factory of Cross Linking Agent for Flat Coating. If you have any question, please feel free to contact us.

Product Categories : Waterborne Polyurethane Product > Waterborne Polyurethane Hardener

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