Products

Bayhydrol  U XP 2750

Properties / Applications 

Bayhydrol   U  XP  2750  is  a  hydroxyfunctional  polycarbonate
ester-polyurethane  dispersion  which  can  be  thinned  with  water  to
application  viscosity.  In  combination  with  hydrophobic  polyisocyanates
(e.g.  Desmodur   N  3600,  N  3900  ,  XP  2730)  and/or  with  hydrophilic
polyisocyanates  (e.g.  Bayhydur  304,  305,  XP  2655)  high  performance  ,
hard-elastic two-component polurethane-hydrocoatings can be formulated.
Two-component polyurethane hydrocoatings based on Bayhydrol  U XP 2750
are characterized by high weathering resistance (gloss-retention , resistance
to cracking) , good appearance ( high gloss , low haze value) and very high
reflow-behavior after dry- or weet-scratching.
Bayhydrol  U XP 2750 is compatible with various polyacrylic dispersions (e.g.
Bayhydrol  A 145, A 2470, A 2601, XP 2645 , XP 2695, XP 2770, XP 2801).
On account of the many potential co-reactants, compatibility testing should
always be carried out.
Cleaning

After  use,  formulation  and  application  equipment  should  be  cleaned
immediately or left to soak in water. Warm water, alkaline cleaning agents or
alkaline isopropyl alcohol are suitable for cleaning.
Storage

- Storage in original sealed Bayer MaterialScience containers.
- Recommended storage temperature: 5 - 30 °C.
- Protect from frost, heat and foreign material.
General information: The product is sensitive to frost. Prologed freezin can
damage the product irreversibly. Prolonged storage at higher temperatures
may result in a decrease of viskosity and/or an increase of average particle
size, possibly resulting in sedimentation of coagulation.
The viscosity of the product is largely governed by the pH. As the pH may
decrease during storage, a decrease in viscosity is also to e expected. The
viscosity can be restored to its original value by the addition of small amounts
of an aqueous 10 % solution of dimethyl ethanol amine.
Contamination with certain bacteria, fungi or algae may render the product
unusable.

Storage time

Bayer MaterialScience represents that, for a period of six months following the
day of shipment as stated in the respective transport documents, the product
will meet the specifications or values set forth in section "specifications or
characteristic data" above, what ever is applicable, provided that the product is
stored in full compliance with the storage conditions set forth in and referenced
under section "storage" above and is otherwise handled appropriately.
The lapse of the six months period does not necessarily mean that the product
no longer meets specifications or the set values. However, prior to using
said product, Bayer MaterialScience recommends to test such a product if it
still meets the specifications or the set values. Bayer MaterialScience does
not make any representation regarding the product after the lapse of the six
months period and Bayer MaterialScience shall not be responsible or liable in
any way for the product failing to meet specifications or the set values after
the lapse of the six months period.
Safety

Hazards identification
Not  a  hazardous  substance  or  preparation  according  to  EU-directives
2006/121/EC or 1999/45/EC.
The safety data sheet should be observed. This contains information on
labeling, transport and storage as well as on handling, product safety and
ecology.
Important

This is a Trial Product of which we do not yet have extensive experience.
No guarantee can therefore be given regarding the behaviour of the
product during processing or use.