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Preparation method of quickly formed thermoplastic polyurethane elastomer

A thermoplastic polyurethane and elastomer technology, which is applied in the field of rapid prototyping thermoplastic polyurethane elastomer preparation, can solve problems such as the inability to meet the requirements of output rate, and achieve the effects of rapid hardening molding speed and excellent mechanical properties

Inactive Publication Date: 2014-08-06
奥斯汀新材料(张家港)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rapid hardening molding thermoplastic polyurethane elastomer materials are widely used in general injection molding materials such as polyurethane rubber wheels, polyurethane sheets, rubber rollers and other products. Because thermoplastic polyurethane elastomer (TPU) is injection molded, the speed of hardening molding is more important. The faster hardening molding speed can increase the output rate of products, thereby reducing production costs and saving energy. However, the molding time of general injection molding thermoplastic polyurethane materials is ≥ 45S, which cannot meet the customer's requirements for output rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] In the reaction kettle, add antioxidant 1010 accounting for 6‰ of the quality of polyester polyol, stannous octoate accounting for 200ppm of polyester polyol quality, and the number-average molecular mass formed by condensation of adipic acid and 1,4-butanediol 2500 polyester polyol, dehydrated, melted and mixed at 95°C and -0.08~-0.1MPa vacuum for 5 hours, then put it into the metering tank, opened the metering tank, stirred and evacuated to -0.085MPa, then stopped the vacuum and filled with nitrogen , forming component A for standby;

[0034] Melt diphenylmethane diisocyanate at 43.5°C and vacuum pump it into a metering tank to form component B for later use;

[0035] Melt 1,4-butanediol at 40°C, vacuum pump it into a metering tank, and dehydrate at -0.08~-0.1MPa vacuum for 4 hours to form component C for later use;

[0036] After mixing C22 higher fatty alkanes, C36 higher fatty alcohols and octanoic acid monobutyl ester with a high-efficiency mixer at a mass ratio ...

Embodiment 2

[0040] Add antioxidant 1010 accounting for 6‰ of the quality of polyester polyol to the reactor, stannous octoate accounting for 200ppm of the quality of polyester polyol, and the number average molecular mass formed by condensation of adipic acid and 1,4-butanediol It is 2500 polyester polyol, dehydrated, melted and mixed for 5 hours under the temperature condition of 95°C and vacuum degree of -0.08~-0.1MPa, then put it into the metering tank, open the metering tank to stir and vacuumize to -0.085MPa, then stop the vacuum and fill Nitrogen, component A spare;

[0041] Melt diphenylmethane diisocyanate at 43.5°C and vacuum pump it into the metering tank, component B for later use;

[0042] Melt 1,4-butanediol at 40°C and pump it into a metering tank under vacuum, dehydrate at -0.08~-0.1MPa vacuum for 4 hours, and form component C for later use;

[0043] Mix C22 higher aliphatic alkanes, C36 higher aliphatic alcohols, and monobutyl octanoate in a mass ratio of 2:1:6 with a hig...

Embodiment 3

[0047] In the reactor, add antioxidant 1010 accounting for 6‰ of the polyol mass, stannous octoate accounting for 200ppm of the polyol mass, and a polymer with a number average molecular weight of 2500 formed by condensation of adipic acid and 1,4-butanediol. Ester polyols are dehydrated, melted and mixed for 5 hours at a temperature of 95°C and a vacuum of -0.08 to -0.1MPa, and then put into a metering tank. Open the metering tank to stir and vacuumize to -0.085MPa, then stop the vacuum and fill with nitrogen to form a compound Part A is spare;

[0048] Melt diphenylmethane diisocyanate at 43.5°C and vacuum pump it into a metering tank to form component B for later use;

[0049] Melt 1,4-butanediol at 40°C and vacuum pump it into a metering tank, dehydrate it under vacuum at -0.08~-0.1MPa for 4 hours, and form component C for later use;

[0050] After mixing C22 higher fatty alkanes, C36 higher fatty alcohols and octanoic acid monobutyl ester with a high-efficiency mixer at ...

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PUM

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Abstract

The invention discloses a preparation method of a quickly formed thermoplastic polyurethane elastomer. The preparation method comprises the following steps: 1) mixing a compound molecular lubricant by a special efficient mixer for later use; 2) adding polyester polyol, an antioxidant and a catalyst into a reaction kettle to be melted, mixed and dehydrated for later use; and 3) increasing the proportion of a mixed section of a twin-screw extruder from 25% to 35%, and meanwhile, reducing the screw pitch of screws in the reaction section by 4-14%. The polyester polyol, a small molecular polyester polyol, an antioxidant and a catalyst and diisocyanate are respectively poured into the twin-screw extruder through a high precision gear pump for reaction and mixing, and meanwhile, the compound molecular lubricant is added into the twin-screw extruder in the middle part of the twin-screw extruder to be melted and mixed with polyurethane elastomer melt to be sliced underwater to obtain the quickly formed thermoplastic polyurethane elastomer. The quickly formed thermoplastic polyurethane elastomer obtained by the preparation method disclosed by the invention has fast hardening and forming rate and excellent mechanical property in injection molding and processing.

Description

technical field [0001] The invention relates to a preparation method of thermoplastic polyurethane elastomer, in particular to a preparation method of rapid molding thermoplastic polyurethane elastomer. Background technique [0002] Rapid hardening molding thermoplastic polyurethane elastomer materials are widely used in general injection molding materials such as polyurethane rubber wheels, polyurethane sheets, rubber rollers and other products. Because thermoplastic polyurethane elastomer (TPU) is injection molded, the speed of hardening molding is more important. The faster hardening molding speed can increase the output rate of products, thereby reducing production costs and saving energy. However, the molding time of general injection molding thermoplastic polyurethane materials is ≥ 45S, which cannot meet the customer's requirements for output rate. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08G18/76C08G18/66C08G18/42
Inventor 汪泽恒杨廷廷艾玲陈海风
Owner 奥斯汀新材料(张家港)有限公司