LOW VOC OR ZERO VOC AQUEOUS COATING COMPOSITION CONTAINING ENCAPSULATION OR POLYMER ADSORPTIVE PIGMENT AND DILUTION BINDER

• Main Authors: FU ZHENWEN, WANG WENQIN, HERMES ANN R
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2016
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PREPARATION OF CARBON BLACK; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide an aqueous composition useful as a zero VOC coating composition providing a coated film having high hardness and good blocking property.SOLUTION: There is provided an aqueous composition having opacification pigment volume concentration % (OPVC%) of 2 to 25 and containing (i) an opaquer composition selected from an opaquer at least partially encapsulated into a polymer, a polymer opacification pigment composite or a mixture thereof and having measurement glass transition temperature (measurement Tg) of 5°C or less as encapsulation in at least one soft polymer and/or a composite with at least one soft polymer and (ii) a hard binder polymer having at least measure Tg of 30°C and weight average particle diameter of 120 nm or less with a ratio of weight average particle diameter of the opaquer composition and weight average particle diameter of the hard binder polymer of 2:1 to 12:1 and a volume ratio of the opacification pigment and the soft polymer solid component in the opaquer composition of 2:5 to 1:1.SELECTED DRAWING: None 【課題】高い硬度及び良好なブロック性の塗膜を与えるゼロＶＯＣコーティング組成物として有用な水性組成物の提供。【解決手段】２〜２５の不透明化顔料容積濃度％（ＯＰＶＣ％）を有し、（ｉ）少なくとも部分的にポリマーにカプセル化された不透明化顔料、ポリマー不透明化顔料複合体、またはそれらの混合物から選択され、不透明化顔料が、少なくとも１つの軟質ポリマー中にカプセル化及び／又は少なくとも１つの軟質ポリマーとの複合体として、５℃以下の測定ガラス転移温度（測定Ｔｇ）を有する、不透明化剤組成物と、（ｉｉ）少なくとも３０℃の測定Ｔｇ及び１２０ｎｍ以下の重量平均粒径を有する硬質結合剤ポリマーと、を含み、不透明化剤組成物の重量平均粒径と硬質結合剤ポリマーの重量平均粒径との比が、２：１〜１２：１であり、不透明化剤組成物中の不透明化顔料と軟質ポリマー固形分との容積比が、２：５〜１：１である水性組成物。【選択図】なし