AQUEOUS GEL-CONTAINING RESIN PARTICLE EMULSION AND METHOD FOR PREPARING SAID AQUEOUS GEL-CONTAINING RESIN PARTICLE EMULSION

• Main Authors: KANEDAI Shuichi, KIJIMA Kenji, KOZUKA Junpei
• Format: Patent
• Language: English; French; German
• Published: 13.03.2019
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

There is provided an aqueous gel-encapsulating resin particle emulsion which is excellent in storage stability such that the tendency to cause separation and sedimentation is suppressed even though the emulsion has particle diameters of 500 nm or larger, or further, 1000 nm or larger, and which can be utilized industrially effectively, and there is further provided a production method that is capable of stably producing the aqueous gel-encapsulating resin particle emulsion having the excellent properties by a simple method that is excellent in polymerization stability. An aqueous gel-encapsulating resin particle emulsion containing a particle that contains an alkali-swellable core portion containing a (meth) acrylic copolymer having an acid value of 200 to 400 mgKOH/g and a resin portion encapsulating the core portion and having a non-alkali-swellable outermost layer of the particle, the non-alkali-swellable outermost layer formed using a hydrophobic monomer, wherein the core portion is an aqueous gel encapsulating a solvent, the resin portion has a thickness of 5% or less of a diameter of the particle, and the particle has an average particle diameter of 500 nm or larger and 5000 nm or smaller, and a method for producing the emulsion.