C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
47/1, 402/372, 4
C08F 220/54 (2006.01) A01G 31/00 (2006.01)
Patent
CA 1239000
Abstract of the Disclosure A process for producing a granular, water-swel- lable crosslinked acrylic copolymer, which comprises copolymerizing in an aqueous medium in the presence of a radical polymerization initiator a monomeric mixture comprising (a) at least one acrylic amide monomer selected from the group consisting of acrylamide, methacrylamide and N-methyl substitution products of these amides and (b) at least one acrylic crosslinkable comonomer selected from the group consisting of N,N'-alkylene- or arylene-bis- acrylamides, N,N'-alkylene-bismethacrylamides, alkylene- bisacrylates, alkylene-bismethacrylates, alkylene glycol- bisacrylates, polyalkylene glycol-bisacrylates, alkylene glycol-bismethacrylates and polyalkylene glycol-bismeth- acrylates, the proportion of the comonomer (b) being 0.01 to 5 moles per 100 moles of the acrylic amide monomer (a), and forming a granular copolymer; and (i) drying the resulting granular copolymer at a temperature of 105 to 150°C, or (ii) heat-treating the resulting granular copolymer in the presence of moisture under substantially sealed conditions at a temperature of 100 to 160°C; and a method of hydroponically growing a plant, which com- prises growing the plant in artificial soil composed of a granular, water-swellable crosslinked acrylic copolymer.
451977
Honda Narimichi
Nakano Takayuki
Wakumoto Hiroshi
Mitsui Petrochemical Industries Ltd.
Smart & Biggar
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