Patent ID: 7655305

Claim:
An adhesive nonspherical microobject having a size ranging from 1 to 1,000 μm and comprising at least one noncoalescent solid phase covered, over at least a part of its surface, with at least one adhesive organic polymer; wherein the noncoalescent solid phase comprises at least one organic polymer having a class transition temperature greater than 40° C. chosen from polystyrene, poly(vinyl acetate), poly(-methylstyrene), poly(acrylamide), poly(acrylonitrile), poly(vinyl chloride), copolymers based on styrene and on a C 1 -C 4 alkyl (meth)acrylate, copolymers based on styrene and on acrylamide, copolymers based on styrene and on acrylonitrile, copolymers based on styrene and on vinyl acetate, copolymers based on acrylamide and on a C 1 -C 4 alkyl (meth)acrylate, copolymers based on acrylonitrile and on a C 1 -C 4 alkyl (meth)acrylate, copolymers based on acrylonitrile and on acrylamide, terpolymers based on styrene, on acrylonitrile and on acrylamide, poly(methyl methacrylate), poly(ethyl methacrylate) and styrene/butadiene, styrene/acrylic acid, styrene/vinylpyrrolidone and butadiene/acrylonitrile copolymers.