Polymeric microbeads and method of preparation

Details Polymeric microbeads and method of preparation Polymeric microbeads and method of preparation

1994-06-06

1996-12-10

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 61, 521 62, 521 63, 521 64, 521150, C08J 916, C08J 926, C08J 928, C08F 3600

Patent

active

055831621

ABSTRACT:
The present invention relates to porous crosslinked polymeric microbeads having cavities joined by interconnecting pores wherein at least some of the cavities at the interior of each microbead communicate with the surface of the microbead. Approximately 10% of the microbeads of the present invention are substantially spherical or substantially ellipsoid or a combination of the two. The present invention also relates to a process for producing a porous, crosslinked polymeric microbead as well as the product of this process. This process involves combining a continuous phase with an aqueous discontinuous phase to form an emulsion, adding the emulsion to an aqueous suspension medium to form an oil-in-water suspension of dispersed emulsion droplets, and polymerizing the emulsion droplets to form microbeads. Also included in the invention are modifications of the microbeads as well as methods for using the microbeads in a variety of applications.

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