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Thermoplastic polyurethane elastomer and polyurethane prepolymer material and preparation method thereof

A thermoplastic polyurethane and prepolymer technology, applied in the field of thermoplastic polyurethane elastomer and polyurethane prepolymer materials and their preparation, can solve the problems of easy softening, decomposition, mechanical performance degradation, and limited application range, etc., and achieve high mechanical performance , simple method, strong operational effect

Inactive Publication Date: 2016-03-09
CHENGDU DUOLIDUO NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor heat resistance, flammability, and easy softening and decomposition at high temperatures, the mechanical properties drop sharply, which greatly limits its application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 15 parts of 1,4-cyclohexane diisocyanate, 10 parts of nitrile rubber, 5 parts of catalyst, 2 parts of zinc stearate, 12 parts of polyester polyol, and 20 parts of polycarbonate, and add these raw materials into the mixer In the vacuum dehydration at 100°C for 30 minutes, then lower the temperature to 80°C; then pump it into the primary reactor, heat up to 95°C at a rate of 5°C / h and react for 1 hour, then send it to the secondary reactor and heat up to 105°C Down reaction 2h, made thermoplastic polyurethane prepolymer material;

Embodiment 2

[0025] Weigh 20 parts of 1,4-cyclohexane diisocyanate, 12 parts of nitrile rubber, 7 parts of catalyst, 5 parts of zinc stearate, 18 parts of polyester polyol, and 27 parts of polycarbonate, and add these raw materials into the mixer In vacuum dehydration at 110°C for 40 minutes, then lower the temperature to 85°C; then pump it into the primary reactor, heat up to 97°C at a rate of 8°C / h and react for 2 hours, then send it to the secondary reactor and raise the temperature to 107°C Under reaction 2.5h, made thermoplastic polyurethane prepolymer material;

Embodiment 3

[0027] Weigh 25 parts of 1,4-cyclohexane diisocyanate, 15 parts of nitrile rubber, 8 parts of catalyst, 7 parts of zinc stearate, 22 parts of polyester polyol, and 35 parts of polycarbonate, and put these raw materials into the mixer In the vacuum dehydration at 120°C for 50min, then lower the temperature to 90°C; then pump it into the primary reactor, heat up to 100°C at a rate of 10°C / h and react for 3.5h, then send it into the secondary reactor and raise the temperature to 110°C Reaction at ℃ for 3 hours to obtain a thermoplastic polyurethane prepolymer material;

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PUM

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Abstract

The invention relates to the fields of high polymer materials and production thereof and in particular relates to a thermoplastic polyurethane elastomer and polyurethane prepolymer material and a preparation method thereof. The thermoplastic polyurethane prepolymer material comprises the following components in parts by mass: 15-25 parts of 1,4-cyclohexane diisocyanate, 10-15 parts of nitrile rubber buna, 5-8 parts of a catalyst, 2-7 parts of zinc stearate, 12-22 parts of polyester polyol and 20-35 parts of polycarbonate. The thermoplastic polyurethane elastomer is prepared by performing extrusion pelletizing on the thermoplastic polyurethane prepolymer material and a mixture of polytetrahydrofuran and polystyrene. The prepared thermoplastic polyurethane prepolymer material has excellent mechanical property and ageing resistance, the prepared polyurethane elastomer is good in heat-resistant quality and high in mechanical property, the operating temperature can be more than or equal to 95 DEG C, and the method for preparing the thermoplastic polyurethane elastomer and thermoplastic polyurethane prepolymer material is simple and high in operability.

Description

technical field [0001] The invention relates to the field of polymer materials and its production field, in particular to a thermoplastic polyurethane elastomer and polyurethane prepolymer material and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (also known as TPU, hereinafter referred to as TPU) new material is called "epoch-making new polymer material" and is one of the six most promising synthetic materials in the world. TPU has high hardness and elasticity, good oil resistance, ozone resistance and excellent low temperature performance, and is widely used in light industry, textile, vehicle, civil engineering, electromechanical, shipbuilding and aviation and other fields. However, due to its poor heat resistance, flammability, and easy softening and decomposition at high temperatures, the mechanical properties drop sharply, which greatly limits its application range. Contents of the invention [0003] The invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/69C08G18/44C08G18/42C08K5/098C08G18/48C08G18/62C08G18/12
CPCC08G18/751C08G18/12C08G18/4241C08G18/44C08G18/698C08K5/098
Inventor 刘华昆
Owner CHENGDU DUOLIDUO NEW MATERIAL
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