Flame retardant type thermoplastic polyurethane elastomer and preparation method thereof
A thermoplastic polyurethane and elastomer technology, used 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 distribution of micropores
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[0031] Example 1
[0032] Synthesis of flame retardant TPU:
[0033] In percent by weight,
[0034]
[0035]
[0036] The catalyst is organotin and organobismuth whose mass ratio is 3:1.
[0037] The anti-aging agent is 1076 and UV-531 in a mass ratio of 7:1.
[0038] The weight average molecular weights of the polytetrahydrofuran diol and the polyoxypropylene diol are independently 1200-1300.
[0039] The nitrogen-based halogen-free flame retardant is melamine.
[0040] The chain extender is ethylene glycol.
[0041] Mix the formula amount of polyethylene 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 lowered the temperature to 80°C, added a metered amount of MDI-100, mixed at 4000r / min for 2 minutes, poured it into a flat mold pre-coated with a release agent, and aged in a 90°C oven for 24 hours, the obtained flakes were...
Example Embodiment
[0042] Example 2
[0043] Synthesis of flame retardant TPU:
[0044] In percent by weight,
[0045]
[0046]
[0047] The catalyst is organotin and organobismuth whose mass ratio is 5:1.
[0048] The anti-aging agent is 1076 and UV-531 in a mass ratio of 4:1.
[0049] The weight-average molecular weights of the polytetrahydrofuran diol and the polyoxypropylene diol are independently 1700-1800.
[0050] The nitrogen-based halogen-free flame retardants are melamine and dicyandiamide.
[0051] The chain extenders are ethylene glycol and 1,2-propanediol.
[0052]Mix the formula amount of polyethylene 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 lowered the temperature to 80°C, added a metered amount of MDI-100, mixed at 4000r / min for 2min, poured it into a flat mold pre-coated with a release agent, and aged in a 90°C oven fo...
Example Embodiment
[0053] Example 3
[0054] Synthesis of flame retardant TPU:
[0055] In percent by weight,
[0056]
[0057] The catalyst is organotin and organobismuth whose mass ratio is 4:1.
[0058] The anti-aging agent is 1076 and UV-531 in a mass ratio of 10:1.
[0059] The weight average molecular weights of the polytetrahydrofuran diol and the polyoxypropylene diol are independently 1400-1500.
[0060] The nitrogen-based halogen-free flame retardants are melamine, dicyandiamide and melamine cyanurate.
[0061] The chain extenders are ethylene glycol, 1,2-propanediol and 1,4-butanediol.
[0062] Mix the formula amount of polyethylene 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 lowered the temperature to 80°C, added a metered amount of MDI-100, mixed at 4000r / min for 2min, poured it into a flat mold pre-coated with a release agent, ...
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