Double-component solvent-free polyurethane structural adhesive coated at normal temperature, as well as preparation method and application method thereof

The invention provides a double-component solvent-free polyurethane structural adhesive coated at normal temperature, as well as a preparation method and an application method thereof. The double-component solvent-free polyurethane structural adhesive comprises a component A and a component B, wherein the component A contains aromatic and/or aliphatic and/or alicyclic diisocyanate, polyester polyol and/or polyether polyol and/or plant oil modified polyol with two or more functionality degrees, and/or polyol of which the carbon chain length is smaller than C12; the component B contains at least one polyol a of which the carbon chain length is smaller than C12, polyol b with at least two or more functionality degrees, plant oil modified polyol c, aromatic and/or aliphatic and/or alicyclic diisocyanate d, a solid powder filler e, a siloxane coupling agent f and a curing speed regulating agent g. The double-component solvent-free polyurethane structural adhesive is applicable to adhesion of metals, woods, plastics and hard foam materials. The double-component solvent-free polyurethane structural adhesive has the advantages of being simple to operate, convenient to use, good in safety, free of solvent, friendly to environment, excellent in adhesive property and stripping resistance and relatively good in thermal impact resistance.