PAINT FILM FOR TIME DISCOLORATION

• Main Authors: TAGUCHI MITSUYOSHI, SHIMAMOTO KOICHIRO
• Format: Patent
• Language: English
• Published: 06.04.1992
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PEST REPELLANTS OR ATTRACTANTS; PHYSICS; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; TESTING; TRAPPING

PURPOSE:To facilitate the identification of shapes, thicknesses, densities application irregularity and the like by fixing the discolored coloring matter having a lactone ring or a lactam ring and a solid acidic material, forming a colored paint film, and laminating a paint film comprising a polar organic solvent and a binder on the colored paint film. CONSTITUTION:At least one solid or acidic material is selected out of the groups comprising powder wherein oxide or hydroxide in group III - IV elements of the periodic table is present on the surface of a particle, solid phenols, solid organic acids and solid organic sulfonic acids. The main components of a colored film are the solid acid material described above, discolored coloring matter having a lactone ring or lactan ring and a binder resin. A polar organic solvent has at least one atomic group which is selected from groups comprising hydroxide groups, aldehyde groups, amide groups, ether bonded groups, ketone groups and ester groups. A paint film whose main components are the polar organic solvent and a binder resin is overlapped and formed on the colored paint film. Thus the shapes thicknesses, densities, application irregularity and the like of the films can be readily identified by visual inspection.