BAYER PATENTS
PIGMENT PREPARATIONS
Patent No. U.S. 6,881,255 B2
Bayer Chemicals AG has received
a patent for pigment preparations
comprising at least one pigment, at
least one polyethyleneimine which is
alkoxylated, and at least one condensation
product based on sulphonated
aromatics, aldehydes and/or ketones
and optionally a compound selected
from the group consisting of nonsulphonated
aromatics, urea and
urea derivatives. CW