News on November 25, 2023, according to the announcement of the State Intellectual Property Office, Beijing Gaomeng New Materials Co., Ltd. applied for a project called "A vegetable oil-based flame retardant two-component polyurethane adhesive and its preparation Method", Publication No. CN117106406A, application date is August 2023.
The patent abstract shows that the invention relates to a vegetable oil-based flame retardant two-component polyurethane adhesive and its preparation method. First, the vegetable oil polyol is reacted with isocyanate to prepare a hydroxyl-terminated polyurethane prepolymer; secondly, a silane coupling agent is used at a certain temperature and rotation speed. The linking agent is used to dry-modify fillers and flame retardants. Then, the prepared hydroxyl-terminated prepolymer, modified filler and modified flame retardant are mixed with a flame retardant, chain extender, cross-linking agent, catalyst, etc. to prepare component A; component B is the isocyanate component. Mix component A and component B uniformly in a ratio of 3 to 5:1 to obtain a flame-retardant polyurethane adhesive. The adhesive has a wide range of bonding base materials, including SMC, metal, PVC, etc., and has excellent bonding performance. The aluminum sheet/aluminum sheet bonding strength reaches more than 15MPa, and the adhesive has excellent flame retardant properties, with a limiting oxygen index of up to More than 30, after igniting for 10 seconds, it will be extinguished within 5 seconds of leaving the fire, and no molten droplets will be generated. The flame retardant grade reaches UL94 V0 level.
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