| abstract |
The invention discloses a UV-moisture dual-curing polyurethane sealant which comprises the following components in parts by weight: 100 parts of polyurethane prepolymer, 10-50 parts of dioctyl phthalate diluent, 50-100 parts of filler, 0-10 parts of titanium dioxide, 2-4 parts of thixotropic agent, 2-5 parts of oxazolidine water remover, 2-5 parts of adhesion promoter, 1-3 parts of catalyst and 1-3 parts of photoinitiator. The UV-moisture dual-curing polyurethane sealant can be cured by UV radiation or moisture, combines the advantages of UV radiation curing and moisture curing, solves the problems of complex operation and short application period of a two-component polyurethane sealant, overcomes the defects of low curing speed and easiness in foaming of the traditional one-component moisture curing polyurethane sealant, simultaneously overcomes the defect that the traditional UV-moisture light-blocking area cannot be cured, realizes rapid curing, and effectively widens the application range. |