Flame-retardant polyurethane rigid foam plastic and preparation method and application thereof
A rigid foam plastic and polyurethane technology, applied in the field of polymer materials, can solve the problems of insufficient flame retardant effect, poor comprehensive performance, and great harm to human body, and achieve the effects of uniform cells, good mechanical properties, and excellent comprehensive performance.
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[0047] Example 1
[0048] Weigh the polyethylene oxide polyol, flame retardant, stannous octoate, silicone oil, n-pentane (if the foaming agent is already contained in the commercial polyol, it may not be added), put it into the mixing kettle, and stir for 5 minutes to make it Mix uniformly to obtain combined polyol (material A). Weigh polymethylene polyphenyl polyisocyanate (material B) and add it to material A, stir quickly for 20 seconds to make it evenly mixed, then pour the above-mentioned reaction liquid into a mold for foaming, and cure at room temperature for 20 hours to obtain flame-retardant polyurethane Rigid foam material. The LOI value is 30.
[0049] The flame retardant is: 40 parts of ammonium polyphosphate and 25 parts of coated red phosphorus.
Example Embodiment
[0050] Example 2
[0051] Weigh polypropylene oxide polyol, flame retardant, stannous octoate, silicone oil, fluorodichloroethane (if the commercial polyol already contains foaming agent, it may not be added), put it into the mixing kettle, and stir for 25 minutes Make it evenly mixed to obtain a combined polyol (material A). Weigh polymethylene polyphenyl polyisocyanate (material B) and add it to material A, stir quickly for 35 seconds to make it evenly mixed, then pour the above-mentioned reaction liquid into a mold for foaming, and cure at room temperature for 20 hours to obtain flame-retardant polyurethane Rigid foam material. The LOI value is 32.
[0052] Among them, the flame retardant is: 10 parts of hollow glass beads and 25 parts of coated red phosphorus.
Example Embodiment
[0053] Example 3
[0054] Weigh polyhexamethylene adipate diol, flame retardant, stannous octoate, silicone oil, monofluorodichloroethane (if the commercial polyol already contains foaming agent, it may not be added), and put it into the mixing kettle , Stir for 5 minutes to make it evenly mixed to obtain a combined polyol (material A). Weigh polymethylene polyphenyl polyisocyanate (material B). Use spraying equipment to spray material A and material B and cure them at room temperature for 18 hours to obtain a flame-retardant polyurethane rigid foam material. The LOI value is 32.
[0055] The flame retardant is: 15 parts of phenyl phosphite and 35 parts of coated red phosphorus.
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