WATER SOLUBLE COPOLYMER

• Main Authors: IYANAGI KOICHI, NIO ATSUSHI, KAJI MEGUMI, TSUYUKI MOE, TAKEYAMA YUICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 16.03.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a coating agent excellent in quick drying property, providing a coated film flexible and excellent in water resistance and suitable for use in an aqueous composition.SOLUTION: There is provided a copolymer by copolymerizing an acryl ester-based monomer having an alkyl group with a specific branched structure of 1 to 35 mass% and a hydrophilic acrylic monomer with a specific structure of 30 to 95 mass%. The copolymer is preferably obtained by radical polymerization in a mixed solvent of a solution having a buffer effect and an aqueous solvent mixed with water at any ratio at 25°C. There is provided a water soluble copolymer suitable as a coating agent for an aqueous composition such as an aqueous coating.SELECTED DRAWING: None 【課題】速乾性に優れ、柔軟で耐水性に優れた被膜を与える、水性組成物に使用するのに好適な被膜剤の提供。【解決手段】特定の分岐構造のアルキル基を有するアクリルエステル系モノマーと１〜３５質量％、特定の構造を有する親水性アクリル系モノマー３０〜９５質量％と、を重合させたコポリマー。また、該コポリマーは、緩衝作用を有する水溶液と２５℃で水と任意の割合で混和する水性溶媒との混合溶媒中で、ラジカル重合して得ることが好ましい。水性塗料などの水性組成物用の被膜剤として好適である水溶性コポリマー。【選択図】なし