Premixed polyether for ocean buoys, polyurethane raw material composition, polyurethane foam and preparation method of polyurethane foam
A polyurethane foam and raw material composition technology, applied in the field of polyurethane, can solve the problems of low rigidity and strength of FRP, attenuation of FRP strength, insufficient rigidity, etc., and achieve the effect of light weight, excellent waterproof performance, and insensitivity to humidity and temperature
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Embodiment 1-3
[0068] The parts by weight of the raw material composition of combined polyether and each component of isocyanate in embodiment 1-3 are specifically as shown in table 1:
[0069] Table 1 Combination of polyether and isocyanate components by weight.
[0070] Raw materials (Part A and Part B) Example 1 Example 2 Example 3 Example 4 Example 5 Polyether polyol NJ-6249 45 50 55 50 55 Polyether polyol NJ-8206H 30 35 25 25 30 Polyester polyol PEB-175 25 15 20 25 15 Foam stabilizer M-88608 2 2.5 2.5 2.5 3 pentamethyldiethylenetriamine 0.5 0.5 0.55 0.6 0.55 N, N-dimethylcyclohexylamine 1.0 1.0 0.9 0.7 0.8 N, N-dimethylbenzylamine 1.1 1.0 1.1 1.1 1.2 BX405 0.9 1.0 0.8 0.8 0.7 Deionized water 1.5 1.55 1.6 1.65 1.7 Cyclopentane 21 19 20 21 19 Combined polyether total components 128 125.55 127.45 129.35 126.95 Isocyanate PM200 153.6 150.66 152.94 155.22 ...
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