The invention discloses a
flame-retardant
adhesive. The
adhesive is prepared from the following components, in parts by weight, 100 parts of a phenolic resin composition, 15-70 parts of liquid-state
polyurethane, and 0.05-0.5 part of a catalyst, wherein the phenolic resin composition comprises phenolic resin and a
fire retardant, and the
fire retardant is preferably an inorganic
fire retardant; and a preparation method for the
flame-retardant
adhesive comprises the following steps: step 1, preparing the phenolic resin composition, step 2, preparing the liquid-state
polyurethane, step 3, adding the phenolic resin composition obtained in the step 1 to a reaction kettle, introducing a protective gas, wherein the protective gas is preferably
nitrogen gas, then adding the liquid-state
polyurethane obtained in the step 2, and performing stirring for 0.5-1h, and step 4, adding the catalyst to the reaction kettle, performing stirring for 5-10h, discharging the prepared adhesive, and then allowing the adhesive to be directly used for bonding or subpackaging the adhesive in containers for storage, wherein the storage is preferably performed at the
atmosphere of
nitrogen gas. The
flame-retardant adhesive is an
environmentally friendly material, can be solidified at
room temperature, has excellent
toughness, bonding performance and flame-retardant performance, and is suitable for the bonding of bamboo materials, wood materials and straws.