RESIN COMPOSITION FOR THERMOSETTING COATING

A resin composition for thermosetting coating, which comprises (a1) an acrylic copolymer having a particular acid value and/or (a2) an acrylic copolymer having a particular acid value and a particular hydroxyl value, (b) an acrylic copolymer having a particular epoxy equivalent, (c) a monobasic acid...

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Bibliographische Detailangaben
Hauptverfasser:	KANO, TAISAKU, MIYAZAKI, EIICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	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 METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	A resin composition for thermosetting coating, which comprises (a1) an acrylic copolymer having a particular acid value and/or (a2) an acrylic copolymer having a particular acid value and a particular hydroxyl value, (b) an acrylic copolymer having a particular epoxy equivalent, (c) a monobasic acid having a dissociation constant (pKa) of 3 or less, and, as necessary, (d) an amino resin and (e) a quaternary phosphonium salt, and wherein the equivalent ratio of the acid group of (a1) and/or (a2) and the epoxy group of (b) is 1:0.5 to 0.5:1 and the amounts of (c), (d) and (e) are 0.01-5 parts by weight, 1-25 parts by weight and 0.01-3 parts by weight, respectively, per 100 parts by weight of the total of (a1) and/or (a2) and (b). Said resin composition, when used as a clear coating for automobiles, is superior in film appearance, acid resistance, solvent resistance, water resistance, weatherability, storage stability and low temperature curing.