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MERCK PATENTS



Published August 11, 2005
MERCK PATENTS
OPALESCENT EFFECT PARTICLES
Patent No. U.S. 6,818,051 B2
Merck GmbH has received a
patent for particles with an opalescent
effect, which have a particle
size of five μm to 5000 μm, comprising
monodisperse polymer spheres
having a diameter of 50 nm two μm
with a standard deviation of less than
five percent in a closely packed and
regularly ordered structure which is
three-dimensional in terms of domains
and is mechanically stabilized by physical
or chemical modification.


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