Thermoplastic polyether ester elastomer composition as well as preparation method and application thereof

A thermoplastic polyetherester and polyetherester elastomer technology, applied in the field of thermoplastic polyetherester elastomer composition and its preparation, can solve the problem that polyetherester elastomers cannot meet the requirements of low price, high quality, low tensile strength, Insufficient resilience and other problems, to achieve the effect of improving processing performance and mechanical properties, high elongation at break, and low production cost

Active Publication Date: 2014-05-14
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when polyether ester elastomers are used as elastic gaskets for rail transit, there is a defect of insufficient resilience. In addi

Method used

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  • Thermoplastic polyether ester elastomer composition as well as preparation method and application thereof
  • Thermoplastic polyether ester elastomer composition as well as preparation method and application thereof
  • Thermoplastic polyether ester elastomer composition as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] Preparation of polycaprolactone polyol (B-PCL):

[0050] Heat a clean and dry four-necked flask in an oil bath at 120°C, and at the same time pass nitrogen to remove impurities such as moisture and oxygen in the flask; raise the temperature of the oil bath to 140°C~160°C, and add caprolactone monomer , Initiator trimethylolpropane or pentaerythritol and catalyst butyl titanate, under nitrogen protection, temperature control and stirring reaction for 6 h ~ 8 h, stop heating, continue stirring with nitrogen, stop when the temperature of the reactant drops below 60 °C The reacted polycaprolactone is cooled under the protection of nitrogen, dissolved in chloroform, reprecipitated with methanol, vacuum-dried at 40°C after suction filtration, and the number-average molecular weight is 2000.

[0051] Synthesis of polyetherester elastomer (TPEE):

[0052] According to the formula shown in Table 1, add DMT, BDO and B-PCL, polytetrahydrofuran diol (Mn=1000) into the reaction ...

Embodiment 1-9、 comparative example 1-3

[0056] According to the proportions of the components shown in Table 2, add TPEE, isocyanate compounds, antioxidants, processing aids, etc. Extruded and granulated to obtain thermoplastic elastomer TPEE modified material, the performance test results are shown in Table 2.

[0057] Table 2 embodiment 1-9 and comparative example 1-3 concrete proportioning and test performance result

[0058]

[0059] From the comparison of the results of Example 1 and Comparative Example 1, Example 4 and Comparative Example 2, it can be seen that adding a small amount of MDI or TDI to the polyetherester elastomer can significantly reduce the melt index of the composition and improve the tensile strength of the material. Tensile strength, its elongation at break is also more appropriate, and has better resilience.

[0060] From the comparison of Example 6 and Comparative Example 3, it can be seen that the addition of excessive isocyanate compounds in Comparative Example 3 greatly reduces the ...

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Abstract

The invention discloses a thermoplastic polyether ester elastomer composition as well as a preparation method and application thereof. The thermoplastic polyether ester elastomer composition comprises 80-100 parts of polyether ester elastomer and 0.2-5 parts of isocyanate compound. The preparation method comprises the steps of adding the components to a high-speed mixer so as to be mixed at a high speed, and then adding the mixture to a double-screw extruder so as to be subjected to extruding granulation at 210-250 DEG C, thus obtaining the thermoplastic polyether ester elastomer composition. The thermoplastic polyether ester elastomer composition and the preparation method have the beneficial effects that by adding the isocyanate compound to modify the polyether ester elastomer, the melt index of the material can be obviously reduced, the tensile strength of the material can be improved, the elongation at break of the material is relatively high, and the material has good resilience effect and good dynamic/static stiffness; the process is simple, and the production cost is relatively low; the thermoplastic polyether ester elastomer composition can be used in the fields such as track traffic gaskets and the like.

Description

technical field [0001] The invention belongs to the field of plastic modification, and in particular relates to a thermoplastic polyether ester elastomer composition and its preparation method and application. Background technique [0002] Thermoplastic polyetherester elastomer (TPEE) has the characteristics of both rubber and thermoplastic engineering plastics. It exhibits the characteristics of rubber at room temperature and the characteristics of thermoplastics at high temperatures. It can be plasticized and molded, and it is easy to process. Its molecular structure consists of two parts: hard segment (aromatic polyester) and soft segment (polyether / polyester). The rigidity, polarity and crystallinity of the hard segment make it have good high temperature performance and oil and solvent resistance, and the low glass transition temperature and saturation of the soft segment polyether make it have excellent low temperature performance and anti-aging sex. Widely used as pa...

Claims

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Application Information

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IPC IPC(8): C08L67/00C08K5/29C08G63/66C08G63/78B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 欧阳春平焦建赵巍苑仁旭徐依斌曾祥斌蔡彤旻夏世勇
Owner KINGFA SCI & TECH CO LTD
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