A kind of synthetic method of thermoplastic polyurethane elastomer that can be crosslinked by ultraviolet light
A technology of thermoplastic polyurethane and synthesis method, which is applied in the field of thermoplastic polyurethane elastomer synthesis, can solve the problems of only about two weeks, increased cost, high price, etc., and achieves the effect of low deformation and improved swelling resistance.
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Synthetic example 1
[0025] (1) Melt 10KG of polyadipate-1,4-butylene glycol and 2.5KG of hydroxyl-terminated poly-1,4-butadiene into the reactor F, heat to 110°C, and After dehydration at -0.095MPa for 2 hours, cool down to 90°C and stir evenly for use. Take 7.4KG of pure MDI and heat it to melt and control the temperature to 70°C, then add the pure MDI at 70°C to the stirred reactor F in 3 times, and control the temperature of the material in the reactor to 80°C to 90°C. After 2.5 hours, take a sample and titrate the NCO content with the di-n-butylamine method. After reaching the design value, stop the reaction and control the temperature to 80°C to obtain a thermoplastic polyurethane prepolymer.
[0026] (2) Take 2.06KG of chain extender 1,4-butanediol, 0.01g of organic bismuth and 80°C thermoplastic polyurethane prepolymer at a melting temperature of 70°C, and quickly mix them in a vacuum mixer for 30 seconds, then put them into the prepolymer Heat it in a tray at 160°C for curing and molding...
Synthetic example 2
[0029] (1) Melt 10KG of polyadipate-1,4-butylene glycol and 2.5KG of hydroxyl-terminated poly-1,4-butadiene into the reactor F, heat to 110°C, and After dehydration at -0.095MPa for 2 hours, cool down to 90°C and stir evenly for use. Take 5.4KG of pure MDI and heat it to melt and control the temperature to 70°C, then add the pure MDI at 70°C to the stirred reactor F in 3 times, and control the temperature of the material in the reactor to 80°C to 90°C. After 2.5 hours, take a sample and titrate the NCO content with the di-n-butylamine method. After reaching the design value, stop the reaction and control the temperature to 80°C to obtain a thermoplastic polyurethane prepolymer.
[0030] (2) Take 2.92KG of chain extender hydroquinone dihydroxyethyl ether, 0.1g of organic bismuth, and thermoplastic polyurethane prepolymer heated to 95°C at a melting temperature of 120°C and quickly mix them in a vacuum mixer for 30 seconds Then put it into a preheated tray at 160°C for curing a...
Synthetic example 3
[0033] (1) Melt 10KG of polycaprolactone diol and 2.5KG of hydroxyl-terminated poly-1,4-butadiene into the reactor F, heat to 110°C, dehydrate under vacuum -0.095MPa for 2 hours and then cool down Stir evenly at 90°C and set aside. Take 5.4KG of pure MDI and heat it to melt and control the temperature to 70°C, then add the pure MDI at 70°C to the stirred reactor F in 3 times, and control the temperature of the material in the reactor to 80°C to 90°C. After 2.5 hours, take a sample and titrate the NCO content with the di-n-butylamine method. After reaching the design value, stop the reaction and control the temperature to 80°C to obtain a thermoplastic polyurethane prepolymer.
[0034] (2) Take 2.92KG of chain extender hydroquinone dihydroxyethyl ether, 0.1g of organic bismuth, and thermoplastic polyurethane prepolymer heated to 95°C at a melting temperature of 120°C and quickly mix them in a vacuum mixer for 30 seconds Then pour it into a tray preheated at 160°C for curing an...
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