BAYHYDUR® BL 5335
Water-Dispersed Blocked Polyisocyanate
Description
Bayhydur BL 5335 is water-dispersed blocked
aliphatic polyisocyanate resin based on
dicyclohexylmethane diisocyanate (H12MDI)
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 (Viscoeg;C), sec. 10 - 30
Non-Volatile Content, % 34 - 36
pH veg;C 4.4 - 6.0
Typical Properties*
Property Value
Blocked NCO Content, % 2.5
Equivalent wt., avg. (as supplied) 1680
Specific graeg;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 rece
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 working with any product mentioned
in this publication, you must read and become
familiar with available information concerning its
hazards, proper use, and handling. This cannot be
overemphasized. Information is available 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 H12MDI
polyisocyanate/prepolymer and/or monomeric
H12MDI 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
MaterialScience to determine whether this publication has been revised.
Bayer MaterialScience LLC
100 Bayer Road • Pittsburgh, PA • Phone: 1- •
The manner in which you use and the purpose to which you put and utilize our products, technical assistance and information (whether verbal, written or by
way of production evaluations), including any suggested formulations and recommendations are beyond our control. Therefore, it is imperative that you test
our products, technical assistance and information to determine to your own satisfaction whether they are suitable for your intended uses and applications.
This application-specific analysis must at least include testing to determine suitability from a technical as well as health, safety, and environmental
standpoint. Such testing has not necessarily been done by us. Unless we otherwise agree in writing, all products are sold strictly pursuant to the terms of our
standard conditions of sale. All information and technical assistance is given without warranty or guarantee and is subject to change without notice. It is
expressly understood and agreed that you assume and hereby expressly release us from all liability, in tort, contract or otherwise, incurred in connection with
the use of our products, technical assistance, and information. Any statement or recommendation not contained herein is unauthorized and shall not bind us.
Nothing herein shall be construed as a recommendation to use any product in conflict with patents covering any material or its use. No license is implied or
in fact granted under the claims of any patent.
