model strong> pu-655

type strong> hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (hdi)

used as a water-based two-component curing agent component of polyurethane system

introduction strong>

pu-655 is a crosslinker for aqueous systems; such aqueous systems need to be characterized by good bond stability and chemical resistance.

usage strong>

because of moderate hydrophilicity the balance between high performance and high functionality, waterborne two-component polyurethane coatings prepared with pu-655 have the characteristics of fast drying and fast curing, and the formed film has high final hardness and excellent chemical resistance. . pu-655 can also be used as a cross-linking aid for water-based polyols and as a cross-linking agent for most neutral water-based polymer dispersions such as polyurethane, polyvinyl acetate, polyacrylate and synthetic rubber dispersions.

product specifications

physical properties	value
nco content (%)	20.3-21.3
viscosity (23℃, mpa .s)	3500±1000
hazen color value	<60
hdi monomer content (% )	<0.1
density (g/cm³)	about 1.16
flash point (℃)	about 192

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stored in secretin a sealed container

recommended storage temperature: 0- 30 °c.

resists moisture, heat and foreign substances

general information: hydrophilic isocyanates are very sensitive to moisture and react with water to form

carbon dioxide and water insoluble urea. it must therefore be stored in airtight containers. water in various forms (humid air, solvents, wet containers)

must be blocked because co2 the generation of will lead to the increase of pressure and cause danger. high temperature storage will cause a slight increase in viscosity and color.

material safety

material safety data sheet for this product sheets are available upon request.