Primer-spraying-free polyurea material and preparation method thereof

• Main Authors: WANG WEI, SHAO CHUNYAN, WANG DEWEI, LI CANGANG, WANG BAOZHU, WEN XIMEI
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2022
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention provides a primer spraying-free polyurea material and a preparation method thereof, and belongs to the technical field of paint spraying polyurea materials.The primer spraying-free polyurea material is composed of a component A and a component B, and the volume ratio of the component A to the component B is 1: 1; the component A comprises isocyanate, modified polyol and a reactive diluent; the component B comprises a chain extender, a modified chain extender, amine-terminated polyether, color paste, an antioxidant, an ultraviolet light absorber and a light stabilizer; the modified polyol is a grafted copolymer of a silane coupling agent containing an isocyanate group and a trifunctional polyol; the modified chain extender is a copolymer containing an epoxy group silane coupling agent and a secondary amino chain extender. The primer spraying-free polyurea material disclosed by the invention can have excellent adhesive force on various metals without matched primer, also has excellent physical and