TWO-LIQUID TYPE ADHESIVE, LAMINATE, MOLDED BODY, AND PACKAGING MATERIAL

• Main Authors: KASORI RYOSUKE, ITO TAKAYUKI, NAKAMURA HIDEMI, YAMADA SHINJIRO, KOIKE MIOKA
• Format: Patent
• Language: English; Japanese
• Published: 18.06.2024
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; DYES; ELECTRICITY; HANDLING THIN OR FILAMENTARY MATERIAL; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PAINTS; PERFORMING OPERATIONS; POLISHES; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

To provide a packaging material which has excellent moldability and is free from deterioration of adhesive strength and poor appearance even after thermal fusion of the sealant layer.SOLUTION: A two-liquid type adhesive comprises: a polyol composition (A) and a polyisocyanate composition (B), where the polyol composition (A) comprises a polyester polyol (A1) which is a reaction product of a polyvalent carboxylic acid and a polyhydric alcohol and in which 30 mole% or more of the polyfunctional carboxylic acid is an aromatic polyfunctional carboxylic acid. The polyisocyanate composition (B) comprises: a urethane prepolymer (B1) which is a reaction product of a polyol (b1-1) including a polyether polyol and a polyisocyanate (b1-2); and a trimethylolpropane adduct (B2) of toluene diisocyanate, where a ratio of the trimethylolpropane adduct (B2) of toluene diisocyanate in the solid content of the polyisocyanate composition (B) is 10 mass% to 85 mass%.SELECTED DRAWING: Figure 1 【課題】 成型性に優れ、シーラント層の熱融着後も接着強度の低下、外観不良の無い包装材を提供する。【解決手段】 ポリオール組成物（Ａ）と、ポリイソシアネート組成物（Ｂ）とを含み、ポリオール組成物（Ａ）が多価カルボン酸と多価アルコールとに反応生成物であり、多価カルボン酸の３０モル％以上が芳香族多価カルボン酸であるポリエステルポリオール（Ａ１）を含み、ポリイソシアネート組成物（Ｂ）がポリエーテルポリオールを含むポリオール（ｂ１－１）とポリイソシアネート（ｂ１－２）との反応生成物であるウレタンプレポリマー（Ｂ１）と、トルエンジイソシアネートのトリメチロールプロパンアダクト体（Ｂ２）とを含み、ポリイソシアネート組成物（Ｂ）の固形分に占める前記トルエンジイソシアネートのトリメチロールプロパンアダクト体（Ｂ２）の割合が１０質量％以上８５質量％以下である２液硬化型接着剤。【選択図】 図１