BAYHYDURBL5335

BAYHYDUR? BL 5335
Water-Dispersed Blocked Polyisocyanate
Deion
Bayhydur BL 5335 is water-dispersed blocked
aliphatic polyisocyanate resin based on
dicyclohexylmethane diisocyanate (H12)
dissolved in water/MPA/xylene, 56 : 4.5 : 4.5
Application
Bayhydur BL 5335 polyisocyanate is used as the
hardener component for 1K-waterborne coatings.
Bayhydur BL 5335 is used as a crosslinking agent
for hydroxyl-functional water-borne resins, such as
Bayhydrol U XP 2239. The crosslinking reaction
occurs at 150°C for 30 minutes. The properties of
the coating based on Bayhydur BL 5335 are related
to the crosslink density that is dependent on the
polyol used. When reacted with Bayhydrol U XP
2239, coatings with very good water and chemical
resistance can be formulated. Because of excellent
adhesion to glass, systems based on Bayhydur BL
5335 polyisocyanate and Bayhydrol U XP 2239
hydroxy-functional polyurethane dispersion are
especially suitable for glass coatings. As with any
product, use of Bayhydur BL 5335 in a given
application must be tested (including but not limited
to field testing) in advance by the user to determine
suitability.
Product Specifications
Property Value
Flow Time (Viscosity @ 23°C), sec. 10 - 30
Non-Volatile Content, % 34 - 36
pHlue @ 20°C 4.4 - 6.0
Typical Properties*
Property Value
Blocked NCO Content, % 2.5
Equivalent wt.,g. ( supplied) 1680
Specific grity @ 25°C 1.04
Solubility
Bayhydur BL 5335 polyisocyanate is water reducible.
Glycol ethers and alcohols are partially compatible.
Storage
Bayhydur BL 5335 polyisocyanate should be stored
between 5°C and 23°C. With appropriate storage,
this product is stable for six months after receipt ofmaterial by customer
Health and Safety Information
Appropriate literature has been assembled which
provides information pertaining to the health and
safety concerns that must be observed when handling
Bayhydur BL 5335 polyisocyanate. For materials
mentioned that are not Bayer products, appropriate
industrial hygiene and other safety precautions
recommended by their manufacturer should be
followed. Before wong with any product mentioned
in this publication, you must read and become
familiar with ailable information concerning its
hazards, proper use, and handling. This cannot be
overemphasized. Information is ailable in several
forms such as material safety data sheets and
product labels. For further information contact your
Bayer MaterialScience representative or the Product
Safety and Regulatory Affairs Department in Pittsburgh,
Pa.
This product contains reactive H12
polyisocyanate/prepolymer and/or monomeric
H12 and should only be handled using appropriate
protective measures. Please review this
product’s Material Safety Data Sheet for a summary
of such protective measures. These products are
suitable only for and should only be sold for use by
industrial or trade (commercial) professionals. These
products are not suitable for Do-It-Yourself applications.
Note: The information contained in this bulletin is current as of June 2010. Please contact Bayer

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MaterialScience to determine whether this publication has been revised.