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Preparation method of heat-resistant polyester plastic polyurethane elastomer

A thermoplastic polyurethane, polyester polyurethane technology, applied in the field of thermoplastic polyurethane elastomer preparation, can solve the problems of limited wide application, softening deformation, weakened mechanical properties, etc., achieves high thermal decomposition temperature, improves heat resistance, and thermal stability good effect

Active Publication Date: 2014-09-03
苏州奥斯汀新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyurethane elastomer has excellent properties such as good mechanical properties, wear resistance, oil resistance, tear resistance, chemical corrosion resistance, radiation resistance, good adhesion, etc., but its service temperature generally does not exceed 80°C, and materials above 100°C will soften Deformation, the mechanical properties are obviously weakened, and the short-term temperature does not exceed 120 ° C, which seriously limits its wide application

Method used

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  • Preparation method of heat-resistant polyester plastic polyurethane elastomer
  • Preparation method of heat-resistant polyester plastic polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 500g of polyhydric alcohol formed by polycondensation of adipic acid and 1,6-hexanediol into a 2-liter reactor, add 2g of n-butyl orthotitanate, slowly raise the temperature at a rate of 5°C / min, pump while heating Vacuum to vacuum degree 0.04MPa, vacuum dehydration 2h. 280g of dehydrated polyol, 173g of 1,5-naphthalene diisocyanate and 35g of 2-methylbutanediol were respectively heated to 50°C and mixed by a pouring machine and then entered into a twin-screw extruder. Extrude while reacting. In this embodiment, the temperatures of each zone of the screw are set as follows: 80°C, 120°C, 180°C, 200°C, 180°C, 150°C, and the entire reaction extrusion time is 55 seconds.

[0026] Add 65g of E-51 and 650g of the above elastomer and ultrasonically disperse for 3 minutes in an ultrasonic instrument with a power of 1200w to obtain a heat-resistant thermoplastic polyurethane elastomer.

Embodiment 2

[0028] Add 500g of polyols formed by polycondensation of suberic acid and 1,4-butanediol into a 2-liter reactor, add 1.9g of n-butyl orthotitanate, and slowly raise the temperature at a rate of 5°C / min. While evacuating to a vacuum degree of 0.04 MPa, the temperature was raised to 220° C., and the reaction was carried out at this temperature for 1.5 hours.

[0029] 300g of dehydrated polyol, 190g of 1,5-naphthalene diisocyanate and 40g of 4-ethyl heptanediol were heated to 50°C respectively, mixed by pouring machine and then entered into twin-screw extruder. Extrude while reacting. In this embodiment, the temperature settings for each zone of the screw are as follows: 80°C, 120°C, 180°C, 200°C, 180°C, 150°C, and the entire reaction extrusion time is 58 seconds.

[0030] Add 44g of E-51 and 550g of the above elastomer in an appropriate amount of solvent N, N-dimethylformamide (DMF) and stir for 5 minutes while heating with a magnetic stirrer, then pour it into a clean and dry ...

Embodiment 3

[0032] Add 500g of polyols formed by polycondensation of adipic acid and 1,4-butanediol into a 2-liter reactor, add 2.1g of propyl titanate, and 20g of organic bentonite, and slowly heat up at a rate of 6°C / min. While raising the temperature, evacuate to a vacuum degree of 0.045 MPa, and at the same time, the temperature rises to 210° C., and react at this temperature for 2 hours.

[0033] Heat 288g of the above reaction product, 160g of 1,5-naphthalene diisocyanate and 43g of 3-methyl hexanediol to 50°C respectively, mix them with a pouring machine, and then enter the twin-screw extruder, and react in the twin-screw extruder while extrude. In this embodiment, the temperatures set in each zone of the screw are as follows: 80°C, 150°C, 190°C, 220°C, 180°C, 150°C, and the entire reaction extrusion time is 45 seconds.

[0034] 72g of E-51 and 600g of the above elastomer were extruded while reacting in a twin-screw extruder. In this embodiment, the temperatures set in each zone ...

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Abstract

The invention discloses a preparation method of a heat-resistant polyester plastic polyurethane elastomer, which comprises the following steps: 1) adding polyester polyol and a catalyst into a reaction kettle, and dehydrating under the conditions of heating and vacuum to obtain a component A; respectively heating 1,5-naphthyldiisocyanate and a chain extender, evenly mixing with the component A, and carrying out extrusion reaction with a double screw extruder to obtain a polyester polyurethane elastomer; and 2) blending an epoxy resin with the polyester polyurethane elastomer obtained in the step 1) to obtain a blend, and drying the blend at 80-150 DEG C under the pressure of -0.08 to -0.1 MPa for 4-24 hours to obtain the heat-resistant polyester thermoplastic polyurethane elastomer. The heat-resistant polyester thermoplastic polyurethane elastomer prepared by the method is mainly used in the field of application of TPU (thermoplastic polyurethane) at higher temperature.

Description

technical field [0001] The invention relates to a preparation method of a thermoplastic polyurethane elastomer, in particular to a preparation method of a heat-resistant polyester type thermoplastic polyurethane elastomer. Background technique [0002] Thermoplastic polyurethane elastomer (also known as TPU) new material is called "epoch-making new polymer material" and is one of the six most promising synthetic materials in the world. [0003] Polyurethane elastomer has excellent properties such as good mechanical properties, wear resistance, oil resistance, tear resistance, chemical corrosion resistance, radiation resistance, good adhesion, etc., but its service temperature generally does not exceed 80°C, and materials above 100°C will soften Deformation, the mechanical properties are obviously weakened, and the short-term temperature does not exceed 120 ° C, which seriously limits its wide application. Contents of the invention [0004] The technical problem to be solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08G18/58
CPCC08G18/4045C08G18/4238C08G18/58C08G18/664C08G18/7678
Inventor 杨廷廷艾玲汪泽恒陈海风
Owner 苏州奥斯汀新材料科技有限公司
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