LASER PRINTING COMPOSITION AND PRODUCING METHOD OF THE SAME, AS WELL AS MOLDED BODY FOR LASER PRINTING

• Main Authors: AKAMATSU TADASHI, MIZUTANI TATSUYA, HASHIMOTO AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 28.05.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a laser printing composition for readily preparing a compact that does not develop color even when undergoing a kneading process or a molding process, has a function capable of developing color of a chromatic color by laser irradiation, and is capable of suppressing bleed-out of a laser coloring agent.SOLUTION: A laser printing composition according to the present invention contains at least one kind of laser coloring agent (B) selected from a group consisting of a polymer (A), a laser coloring agent (B1) containing a compound having a lactone skeleton and a laser coloring agent (B2) containing a compound having a triarylmethane skeleton, and a compound (C) having a first acid dissociation constant (pKa) of 9 or larger, in which the laser coloring agent (B) is contained by 0.05 pts.mass or larger and 25 pts.mass or smaller relative to 100 pts.mass of the polymer (A).SELECTED DRAWING: Figure 1 【課題】混練工程や成形工程を経ても発色せず、レーザー照射により有彩色を発色し得る機能を有し、かつ、レーザー発色剤のブリードアウトを抑制できる成形体を容易に作成するためのレーザー印字用組成物を提供すること。【解決手段】本発明に係るレーザー印字用組成物は、重合体（Ａ）と、ラクトン骨格を有する化合物を含むレーザー発色剤（Ｂ１）及びトリアリールメタン骨格を有する化合物を含むレーザー発色剤（Ｂ２）よりなる群から選択される少なくとも１種のレーザー発色剤（Ｂ）と、第一酸解離定数（ｐＫａ）が９以上である化合物（Ｃ）と、を含有し、前記重合体（Ａ）１００質量部に対して、前記レーザー発色剤（Ｂ）を０．０５質量部以上２５質量部以下含有する。【選択図】図１