| abstract |
The invention discloses a B1-grade flame-retardant rigid polyurethane foam insulation board and a preparation method and application thereof, which comprise a component A and a component B with a mass ratio of 1:(0.8-1.5), wherein: the component A comprises The following components in parts by weight: 40-80 parts of polyether polyol, 20-60 parts of polyester polyol, 0.1-3 parts of foaming catalyst, 0.1-5 parts of gel catalyst, 0.5-3 parts of trimerization catalyst, 1 part of silicone oil -3 parts, 5-50 parts of modified graphite flame retardant, 5-25 parts of synergistic flame retardant, 5-20 parts of foaming agent, 2-10 parts of stabilizer; Component B is isocyanate and/or polymerized isocyanate . In the present invention, modified graphite flame retardant is added on the one hand, and synergistic flame retardant is added on the other hand, which can react with isocyanate to enhance the mechanical properties of polyurethane rigid foam; It is simple, the process is simple and controllable, and it can meet the needs of industrialization. |