Modified thermoplastic polyurethane elastomer and preparation method thereof
A thermoplastic polyurethane and elastomer technology, applied in the field of modified thermoplastic polyurethane elastomer and its preparation, can solve the problems of poor compatibility, multi-step, doping of compatibilizers, etc., and achieve the effect of improving hardness and strength
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[0023] Example 1
[0024] Modified thermoplastic polyurethane elastomer, made of raw materials including the following parts by weight:
[0025] 70.0 parts of styrene grafted polyester polyol;
[0026] Diphenylmethane diisocyanate MDI 24.4 parts;
[0027] Butylene glycol 5.6 parts.
[0028] The preparation method of modified thermoplastic polyurethane elastomer includes the following steps:
[0029] (1) Dehydrate the styrene grafted polyester polyol and butylene glycol in vacuum at 120°C and 100°C for 3-5h;
[0030] (2) Weigh 70 parts by weight of dried styrene grafted modified polyester diol and 24.4 parts of diphenylmethane diisocyanate into the reaction vessel, and heat up to the temperature at a stirring speed of 260r / min 80℃, vacuum reaction for 2h;
[0031] (3) Release the vacuum, add 5.6 parts of the dried chain extender butanediol into the reaction vessel, stir quickly, the temperature of the material gradually rises to 120°C, the viscosity increases obviously, stop stirring, and ...
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[0032] Example 2
[0033] Modified thermoplastic polyurethane, made of raw materials including the following weight percentages:
[0034] 60.0 parts of styrene grafted polyester polyol;
[0035] Diphenylmethane diisocyanate MDI 31.6 parts;
[0036] Butylene glycol 8.4 parts.
[0037] The preparation method of modified thermoplastic polyurethane elastomer includes the following steps:
[0038] (1) Dehydrate the styrene grafted polyester polyol and butylene glycol in vacuum at 120°C and 100°C for 3-5h;
[0039] (2) Weigh 60 parts by weight of dried styrene grafted polyester polyol and 31.6 parts of diphenylmethane diisocyanate into the reaction vessel, and heat up to 80°C at a stirring speed of 260r / min. Vacuum reaction for 2h;
[0040] (3) Release the vacuum, add 8.4 parts of the dried chain extender butanediol into the reaction vessel, stir quickly, the temperature of the material gradually rises to 120℃, the viscosity increases obviously, stop stirring, and pour it into the polytetrafluo...
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[0041] Example 3
[0042] Modified thermoplastic polyurethane, made of raw materials including the following weight percentages:
[0043] Styrene grafted polyester polyol 50.0
[0044] Diphenylmethane diisocyanate MDI 38.7
[0045] Butylene glycol 11.3
[0046] The preparation method of modified thermoplastic polyurethane elastomer includes the following steps:
[0047] (1) Dehydrate the styrene grafted polyester polyol and butylene glycol in vacuum at 120°C and 100°C for 3-5h;
[0048] (2) Weigh 50 parts by weight of dried styrene grafted polyester polyol and 38.7% diphenylmethane diisocyanate into the reaction vessel, and heat up to 80°C at a stirring speed of 260r / min. Vacuum reaction for 2h;
[0049] (3) Release the vacuum, add 11.3 parts of the dried chain extender butanediol into the reaction vessel, stir quickly, the temperature of the material gradually rises to 120°C, the viscosity increases obviously, stop stirring, and pour it into the polytetrafluoroethylene pan , Cured for 9...
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