Polymerization process for making porous polymeric particles

Details Polymerization process for making porous polymeric particles Polymerization process for making porous polymeric particles

1993-02-01

1994-07-12

Zitomer, Fred

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 32, 521 33, 521 38, 521 62, 521 64, 521 72, 526173, 526178, 526181, 526201, 526208, 526210, 5262321, 526278, 526336, 526340, 5263401, 5263403, 526347, 5263471, 526910, 526911, C08J 928, C08F 220, C08F 836

Patent

active

053289366

ABSTRACT:
A process for making porous polymeric particles having high surface area includes suspending a discontinuous organic phase in an continuous aqueous phase, wherein the organic phase includes an ethylenically unsaturated monomer, a water soluble phase extender and a surfactant in an amount effective to solubilize the water soluble phase extender in the monomer and wherein the aqueous phase includes a diffusion barrier agent for limiting mass transfer of the phase extender from the organic phase to the aqueous phase, and then polymerizing the ethylenically unsaturated monomer to form the porous polymeric particles.

REFERENCES:
patent: 3357158 (1967-12-01), Hollis
patent: 3367889 (1988-02-01), Oline
patent: 3976629 (1976-08-01), Hayward
patent: 4052343 (1977-10-01), Cunningham
patent: 4191812 (1980-03-01), Chong
patent: 4256840 (1981-03-01), Meitzner
patent: 4382124 (1983-05-01), Meitzner et al.
patent: 4972000 (1990-11-01), Kawashima

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