| abstract |
(57) [Abstract] [Purpose] A method for producing a polyurethane / polyurea / elastomer laminate for corrosion protection, protection and weather resistance by spray molding. [Constitution] As the component A, a mixture of a polyisocyanate in which an NCO group is not directly connected to an aromatic ring and a polyisocyanate in which the NCO group is directly connected is used as a prepolymer, and at least two OH groups are used as a component B. Multilayer spray molding of a mixture containing a polyol, an active aromatic polyamine (chain extender) having at least one alkyl group having 1 to 5 carbon atoms in an aromatic ring, and an organometallic catalyst using a high-pressure two-component spraying device. To react. [Effect] Even after a long time has passed after spraying the lower layer, the lower layer and the upper layer do not peel off, and excellent adhesive strength is exhibited. |