Core/Shell Polymeric Particles

August 10, 2005

Core/Shell Polymeric Particles
● Patent No. Europe 1 208 137 A
3M Innovative Properties Company
has patented core/shell polymeric particles,
that can be used as dry powders
or waterborne compositions for dirtresistant
topcoats on signs and other
outdoor applications. They are comprised
of a polymeric reaction of polymerizable
UV absorber, Tg is less than
40°C, optionally with ethyl acrylate, a
crosslinker and dispersed UV
absorber and a (thermoplastic) polymeric
shell, based on five-30 parts per
weight ethyl acrylate and 70-95
weight percent methyl methacrylate.