Flame-retardant thermoplastic polyurethane elastomer and preparation method thereof
A thermoplastic polyurethane and elastomer technology, applied in the field of polyurethane elastomers, can solve the problems of limited application and poor flame retardancy, and achieve the effects of low tensile permanent deformation, excellent flame retardancy, and uniform stress
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Embodiment 1
[0034] Synthesis of flame retardant TPU:
[0035] In terms of weight percentage,
[0036]
[0037]
[0038] The catalyst is organic tin and organic bismuth with a mass ratio of 3:1.
[0039] The anti-aging agent is 1076 and UV-531 with a mass ratio of 7:1.
[0040] The functionality of polyether polyol is 2.02;
[0041] The molecular weight of the polyether polyol is 1000.
[0042] The nitrogen-based halogen-free flame retardant is melamine.
[0043] The chain extender is ethylene glycol.
[0044] Mix the formulated amount of polyhexamethylene adipate diol, polyether polyol, nitrogen-based halogen-free flame retardant, expandable microspheres, catalyst, anti-aging agent and chain extender, and dehydrate at 110°C for 2 hours , then lower the temperature to 80°C, add metered MDI-100, mix at 4000r / min for 2min, pour into a flat mold coated with a release agent, and mature in an oven at 90°C for 24h, and the obtained flakes are broken into Uniform particles with a part...
Embodiment 2
[0046] Synthesis of flame retardant TPU:
[0047] In terms of weight percentage,
[0048]
[0049]
[0050] The catalyst is organic tin and organic bismuth with a mass ratio of 5:1.
[0051] The anti-aging agent is 1076 and UV-531 with a mass ratio of 4:1.
[0052] The functionality of polyether polyol is 2.10;
[0053] The molecular weight of the polyether polyol is 200.
[0054] The nitrogen-based halogen-free flame retardants are melamine and dicyandiamide.
[0055] The chain extenders are ethylene glycol and 1,2-propanediol.
[0056]Mix the formulated amount of polyhexamethylene adipate diol, polyether polyol, nitrogen-based halogen-free flame retardant, expandable microspheres, catalyst, anti-aging agent and chain extender, and dehydrate at 110°C for 2 hours , then lower the temperature to 80°C, add metered MDI-100, mix at 4000r / min for 2min, pour into a flat mold coated with a release agent, and mature in an oven at 90°C for 24h, and the obtained flakes are br...
Embodiment 3
[0058] Synthesis of flame retardant TPU:
[0059] In terms of weight percentage,
[0060]
[0061]
[0062] The catalyst is organic tin and organic bismuth with a mass ratio of 4:1.
[0063] The anti-aging agent is 1076 and UV-531 with a mass ratio of 10:1.
[0064] The functionality of polyether polyol is 2.2;
[0065] The molecular weight of the polyether polyol is 500-600.
[0066] The nitrogen-based halogen-free flame retardants are melamine, dicyandiamide and melamine cyanurate.
[0067] The chain extenders are ethylene glycol, 1,2-propanediol and 1,4-butanediol.
[0068] Mix the formulated amount of polyhexamethylene adipate diol, polyether polyol, nitrogen-based halogen-free flame retardant, expandable microspheres, catalyst, anti-aging agent and chain extender, and dehydrate at 110°C for 2 hours , then lower the temperature to 80°C, add metered MDI-100, mix at 4000r / min for 2min, pour into a flat mold coated with a release agent, and mature in an oven at 90°...
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