Patent ID: 6248849
Filing Date: 2001-06-19
Classification: B01J,C08F,C09K,Y10S,Y10T

Abstract:
A microporous and oil sorbent micro-particle comprising a polymer comprising at least about 60% by weight polyunsaturated monomers and less than about 40% by weight monounsaturated monomers, said particle characterized by having a mean unit diameter of less than about 80 microns, a bulk density of about 0.02 to about 0.04 g/cm.sup.3, and a total adsorption capacity for mineral oil that is 80% by weight or greater, based on the total weight of polymer and adsorbed oil,wherein the polyunsaturated monomer is selected from the group consisting of divinyl benzene, divinyl toluene, divinyl ether, divinyl naphthalene, trivinyl benzene, an alkyldivinyl benzene having 1 to 4 alkyl groups of 1 to 2 carbon atoms substituted on the benzene nucleus, an alkyltrivinyl benzene having 1 to 3 alkyl groups of 1 to 2 carbon atoms substituted on the benzene nucleus, a trivinyl naphthalene, a polyvinyl anthracene, divinyl diphenyl, divinyl cyclohexane, divinyl pyridine, divinyl piperidine, divinyl ethylene, and mixtures thereof,and the monounsaturated monomer is selected from the group consisting of para-amino styrene, ortho-amino styrene, 2-amino-4-vinyl toluene, 2-vinyl pyridine, 3-vinyl pyridine, 4-vinyl pyridine, 2-ethyl-5-vinyl pyridine, diethylaminoethyl vinyl ether, and mixtures thereof.