THERMAL RECORDING MEDIUM FOR LASER MARKING AND PRINTING INK

• Main Authors: KOBAYAKAWA TADASHI, TSUCHIIDA SATORU, KIYONARI TOSHIYUKI, IWAMOTO AKIHIRO
• Format: Patent
• Language: English
• Published: 05.08.1997
• Edition: 6
• Subjects: ADHESIVES; ADVERTISING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; CRYPTOGRAPHY; DISPLAY; DISPLAYING; DYES; EDUCATION; FILLING PASTES; INKS; LABELS OR NAME-PLATES; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; PHYSICS; POLISHES; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SEALS; SIGNS; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To improve the waterproofness and chemical resistance of a texture part by adding a specific fluoran derivative and a specific phenol compound as a developer to a thermal recording layer on a support together with borates having a sensitization action and a texture coloring preventive action. SOLUTION: A thermal recording medium comprising a thermal color developing laser coupler layer which can be easily formed into an arbitrarily selected pattern by a printing method and marked using a laser beam with a high mark preservability contains a fluoran derivative as a basic leuco dye as shown by formula I for enhancing the waterproofness and chemical resistance of a recorded image, a phenol compound as a developer as shown by formula II and borates as a multifunctional additive. In the formula, R1 is a methyl group or an ethyl group; R is a methyl group, a phenyl group, a naphthyl group; and (n) is an integer of 0 or 1. The phenol compound shown in the formula II is such as 4-hydroxyphenylmethyl sulfon.