Low-density polyurethane hot melt adhesive and preparation method thereof

• Main Authors: LIU BIN, WU SHINAN, CAO XUE, LIU LIZHONG, WANG ZIPING, HE CHANGSHENG
• Format: Patent
• Language: Chinese; English
• Published: 11.11.2022
• 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 discloses a low-density polyurethane hot melt adhesive and a preparation method thereof, and the hot melt adhesive is prepared from the following raw materials in parts by weight: 9-20 parts of isocyanate, 20-45 parts of polyether glycol, 10-40 parts of thermoplastic acrylic resin, 10-25 parts of poly (1, 6-hexanediol adipate), 3-10 parts of poly (neopentyl glycol adipate), 3-10 parts of poly (1, 6-hexanediol adipate), 3-10 parts of poly (1, 6-hexanediol adipate), 3-10 parts of poly (1, 6-hexanediol adipate), 3-10 parts of poly (1, 6-hexanediol The composite material is prepared from the following components in parts by weight: 2 to 10 parts of 1, 6-hexanediol ester glycol, 0.5 to 15 parts of hollow glass beads, 0.5 to 2 parts of silane coupling agent, 0.05 to 0.5 part of antioxidant 1010, 0.01 to 0.1 part of stabilizer and 0.01 to 0.5 part of dimorpholine diethyl ether. The adhesive provided by the invention has low density and good hot-melt fluidity, can realize roller coating, blade coating,