POLYVINYL ACETAL MICROPARTICLES FOR WATER-BASED DISPERSION

• Main Author: NAGAI YASUHARU
• Format: Patent
• Language: English; Korean
• Published: 10.06.2015
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

본 발명은 물을 함유하는 분산매에 대한 분산 안정성이 우수하면서, 도포막으로 했을 때에 보이드 및 요철 등의 불균일성이 발생하지 않고, 충분한 기계적 강도, 및 유연성을 갖는 막을 제작할 수 있는 수계 분산액용 폴리비닐아세탈 미립자, 그리고 그 수계 분산액용 폴리비닐아세탈 미립자를 사용한 수계 분산액을 제공한다. 본 발명은, 수계 분산액의 분산질로서 사용되는 수계 분산액용 폴리비닐아세탈 미립자로서, 이온성 관능기를 갖는 폴리비닐아세탈 수지로 이루어지고, 체적 평균 입자 직경이 10 ㎚ ∼ 100 ㎛, 또한 체적 입자 직경 분포의 CV 값이 40 ％ 이하인 수계 분산액용 폴리비닐아세탈 미립자이다. The present invention provides polyvinyl acetal fine particles for an aqueous dispersion which exhibit excellent dispersion stability in a water-containing dispersion medium, and allow for formation of a film having sufficient mechanical strength and flexibility without voids and nonuniform structures such as irregularities, and an aqueous dispersion of the polyvinyl acetal fine particles for an aqueous dispersion. The polyvinyl acetal fine particles for an aqueous dispersion, adapted for use as dispersoids in an aqueous dispersion, the polyvinyl acetal fine particles including a polyvinyl acetal resin with an ionic functional group, and having a volume average particle size of 10 nm to 100 µm, and a CV value of a volume-based particle size distribution of at most 40%.