Bayhydrol A XP 2770
Solubility / thinnability Bayhydrol® A XP 2770 can be thinned with water in
any ratio.
Compatibility Suitable co-reactants for the formulation of
aqueous two-component polyurethane systems include
Desmodur® N 3400, N 3600, N 3800 or N 3900,
Bayhydur® 3100, 304, 305, 401-70, XP 2487/1,
XP 2655 or XP 2759.
Properties / Applications Bayhydrol® A XP 2770 is a hydroxyfunctional
polyacrylic dispersion which can be thinned with
water to application viscosity. Bayhydrol® A XP
2770 combined with aliphatic polyisocyanates
yields high-gloss top coats which can be dried
at room temperature or force-dried, e.g.at 80℃
The cured paint films are hard and flexible with
outstanding resistance to solvents and water and
excellent weatherability.
When properly formulated, e.g.in combination with
Bayhydur® 304 in an NCO / OH ratio of 1.5 : 1,
the pot life is approx. 4 hours.
Bayhydrol® A XP 2770 has good pigment wetting
properties and high shear stability. Bead mills
have proved suitable as grinding equipment. Only
pigments and extenders with a minimum water-soluble
content should be used. Given the many pigments
and extenders available, compatibility testing
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