| abstract |
PROBLEM TO BE SOLVED: To provide a novel organic solvent swellable microgel and a method for producing the same. A copolymer obtained by polymerizing a specific polyethylene oxide macromonomer, a specific hydrophobic monomer, and a specific crosslinkable monomer, comprising the following (A), (B), (C): An organic solvent swellable microgel comprising a copolymer obtained by radical polymerization of the monomers (1) to (3) in a water-ethanol mixed solvent under the above conditions. (A) The charged amount of polyethylene oxide macromonomer and hydrophobic monomer is polyethylene oxide macromonomer: hydrophobic monomer = 1: 10 to 1: 250 (molar ratio) (B) The charged amount of crosslinkable monomer is It is 0.1-1.5 mass% with respect to the preparation amount of a hydrophobic monomer. (C) Water-ethanol mixed solvent is water: ethanol = 90-30: 10-70 (20 degreeC volume ratio). [Selection] Figure 1 |