초록 ▼

An improved in-situ polymerization method is provided for easily producing a good slurry of strong, dense, water-resistant and anti-hygroscopic microcapsules made of an amino resin of either of melamine-formaldehyde series or the ureaformaldehyde series, in a high concentration of microcapsules, and

An improved in-situ polymerization method is provided for easily producing a good slurry of strong, dense, water-resistant and anti-hygroscopic microcapsules made of an amino resin of either of melamine-formaldehyde series or the ureaformaldehyde series, in a high concentration of microcapsules, and a low viscosity.

대표청구항 ▼

A method of producing a slurry of microcapsules having wall membranes comprised of an amino resin, the method comprising: (a) providing an acidic aqueous solution comprised of water and an anionic polyelectrolyte which is an anionic terpolymer of acrylic acid, acrylonitrile, and polyethyleneglycol m

A method of producing a slurry of microcapsules having wall membranes comprised of an amino resin, the method comprising: (a) providing an acidic aqueous solution comprised of water and an anionic polyelectrolyte which is an anionic terpolymer of acrylic acid, acrylonitrile, and polyethyleneglycol methacrylate phosphate, and which is water soluble and has a high molecular weight; (b) mixing an amino compound and an aldehyde into the acidic aqueous solution in quantities sufficient to undergo polycondensation and provide an amino resin; (c) adding a hydrophobic core material into the acidic aqueous solution before, during or after step (b) to emulsify and disperse the hydrophobic core material therein; and (d) encapsulating the hydrophobic core material to form a slurry of microcapsules by polycondensing the amino compound and the aldehyde into an amino resin and depositing the amino resin around the hydrophobic core material to form the slurry of microcapsules.