Patent ID: 6387385
Filing Date: 2002-05-14
Classification: B01J

Abstract:
A composition comprising a suspension of particles of a chemical agent in an aqueous solvent wherein the particles are encapsulating agent selected from the group consisting of polyanhydrides, and acids, salts, and esters thereof; polysaccharides; polymers of acrylic acids; copolymers of acrylic acid; polymers of acrylamide; copolymers of acrylamide; acrylic polymers and copolymers; hydrophobically-modified polyacrylic acids; polymers formed from simultaneous or sequential hydrolysis and neutralization of styrene maleic anhydride copolymers; the ammonium salt of the amic acid derived from styrene maleic anhydride copolymer; poly(methyl vinyl ether-co-maleic anhydride; N-methylacrylamide; (vinyl chloride/vinyl acetate/hydroxyl acrylate) copolymer; and polyisocyanates; and the encapsulated particles are coated with a second encapsulating agent selected from the group consisting of a formaldehyde copolymer, a polyacrylamide, and a phenoxy resins.