Preparation method of highly flame-retardant and environment-friendly thermoplastic polyurethane elastomer
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A thermoplastic polyurethane and elastomer technology, which is applied in the field of preparation of highly flame-retardant and environmentally friendly thermoplastic polyurethane elastomers, can solve the problems that the flame-retardant properties of TPU have not been satisfactorily resolved and restrict the application of TPU, so as to ensure excellent performance and less loss of mechanical properties , the effect of high oxygen index
Active Publication Date: 2016-04-06
SHANDONG INOV POLYURETHANE
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Problems solved by technology
For a long time, the flame retardant properties of TPU have not been satisfactorily resolved, which restricts the application of TPU in the fields of cable sheathing, auto parts and oil hoses.
Method used
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Embodiment 1
[0022] Preparation of high flame retardant and environmentally friendly thermoplastic polyurethane elastomer: polytetrahydrofuran diol (PTMG2000, M=2000), adding dimethyl methylphosphonate (DMMP), vacuum removal of moisture at 110 ° C, diphenylmethane diisocyanate (MDI ) and 1,4-butanediol (BDO) were incubated at 45°C and 40°C, respectively. PTMG2000: 200g, MDI: 89.7g, BDO: 22.8g, DMMP: 31.3g were mixed uniformly, and the isocyanate index was 1.01. The above materials are vigorously stirred, the mixed materials are injected into the twin-screw reactor, and TPU particles are obtained by continuous reaction.
[0023] Take 200 g of the prepared TPU pellets and add them to a plastic mill, and heat up to 180 °C for plasticizing for 1 min to melt uniformly. Add 18.8g of nanometer magnesium hydroxide (MgOH) and 25g of ammonium polyphosphate (APP) to the molten TPU, continue to masticate for 1min, unload the material to a 160°C flat vulcanizer, and press it into a TPU sheet of standa...
Embodiment 2
[0026] According to the preparation method of Example 1.
[0027] Preparation of high flame retardant and environmentally friendly thermoplastic polyurethane elastomer: PTMG2000: 200g, MDI: 105g, BDO: 28.3g, DMMP: 33.3g, nano-MgOH: 20g, APP: 26.7g.
[0028] Its performance testing method is the same as that of Example 1, and the results are shown in Table 1.
Embodiment 3
[0030] According to the preparation method of Example 1.
[0031] Preparation of high flame retardant and environmentally friendly thermoplastic polyurethane elastomer: PTMG2000: 200g, MDI: 122.6g, BDO: 34.6g, DMMP: 35.7g, nano-MgOH: 21.4g, APP: 28.6g.
[0032] Its performance testing method is the same as that of Example 1, and the results are shown in Table 1.
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Abstract
The invention belongs to the field of chemical synthesis technology, and specially relates to a preparation method of high flame-retardant environmental friendly thermoplastic polyurethane elastomers. According to the preparation method, thermoplastic polyurethane elastomer particles are prepared firstly, and then the high flame-retardant environmental friendly thermoplastic polyurethane elastomers are prepared. Oxygen index of the high flame-retardant environmental friendly thermoplastic polyurethane elastomers prepared via the preparation method is high; no droplet is observed in combustion test in the air, only a small amount of black smoke is generated, and self-extinguishment is observed; the high flame-retardant environmental friendly thermoplastic polyurethane elastomers is convenient for processing, a fire retardant can be directly mixed with the high flame-retardant environmental friendly thermoplastic polyurethane elastomer particles in a particle post processing process; mechanical property loss of the products is less; excellent low temperature resistance, flexibility and hydrolysis resistance are maintained. The composite halogen-free flame retardant is added, so that dosage of a single fire retardant is reduced, and excellent performance of the high flame-retardant environmental friendly thermoplastic polyurethane elastomers are maintained as far as possible. Gas, which is harmful to the environment, is not generated because of combustion of the high flame-retardant environmental friendly thermoplastic polyurethane elastomers, so that the high flame-retardant environmental friendly thermoplastic polyurethane elastomers can be widely used in fields such as cable sheaths, auto parts and oil delivery soft pipes.
Description
technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of a high flame-retardant environment-friendly thermoplastic polyurethane elastomer. Background technique [0002] Thermoplastic Polyurethane Elastomer (TPU) has a unique structure of soft and hard block copolymer, which makes TPU have high strength, high elasticity, good wear resistance, oil resistance, low temperature softness, high elongation, corrosion resistance Good and other excellent performance. TPU has both the high elasticity of rubber and the ease of processing of plastics, and has been widely used in shoe materials, sheets, pipes, films, cables, auto parts, medical and sports and leisure fields. Polyether TPU has good toughness, resilience, low temperature resistance and hydrolysis resistance, etc., and it has received extensive attention in the fields of cable jackets, auto parts and fire rescue. However, the oxygen inde...
Claims
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