Humidity-heat-resistant two-component polyurethane adhesive and application thereof

• Main Authors: FENG SIYANG, WANG XIN, BAO JIANNAN, TENG YUN, FU HONG'E
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; 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; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

The invention relates to an adhesive suitable for compounding polyolefin, fluorinated polyolefin, polyester, polyamide and polyimide films and metal foils, and particularly relates to a damp-heat-resistant two-component polyurethane adhesive with excellent damp-heat resistance and weather resistance. The adhesive is composed of a main agent and a curing agent, the main agent is composed of a polyol mixture and an auxiliary agent, and the curing agent is an isocyanate-terminated polyurethane prepolymer generated by reaction of polyol and isocyanate. Wherein the mass ratio of hydroxyl in the main agent to isocyanate group in the curing agent is 1: (1.3-1.7). The composite film prepared by using the adhesive disclosed by the invention can tolerate PCT aging at 121 DEG C for 144 hours or more, and almost has no yellowing phenomenon after ultraviolet aging for 2000 hours. 本发明涉及适用于聚烯烃类、氟化聚烯烃类、聚酯类、聚酰胺类、聚酰亚胺类薄膜及金属箔的复合所使用的粘接剂，具有极好的耐湿热、耐候性能，具体的说是一种耐湿热双组分聚氨酯胶粘剂。该胶粘剂由主剂、固化剂组成，所述主剂由多元醇混合物及助剂组成，固化剂为多元醇与异氰酸酯反应生成的异氰酸酯封端的聚氨酯预