| abstract |
The patent of the present invention relates to a mixed foaming agent combining polyether and polyurethane rigid foam, which belongs to the technical field of polymer materials. The mixed foaming agent combined polyether comprises the following raw materials in parts by weight: 30-50 parts of polyester polyol I; 30-40 parts of polyester polyol II; 10-40 parts of polyester polyol III; 10-15 parts of mixed foaming agent; 2.5-3.5 parts of catalyst I; 1.5-2.0 parts of catalyst II; 2.5-3.0 parts of foam stabilizer; 15-30 parts of flame retardant; a total of 100 parts of polyester polyols I, II and III. It can achieve zero DOP, low GWP, low cost, and environmental protection; the present invention also provides a rigid polyurethane foam prepared from the mixed foaming agent and polyether, which has good dimensional stability, excellent mechanical properties, and thermal conductivity. Low coefficient, low feed density, high output rate, and better cost savings. |