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TPU (thermoplastic polyurethane) elastomer composition with high crystallization capacity and preparation method of TPU elastomer composition

A thermoplastic polyurethane and elastomer technology, which is applied in the field of thermoplastic polyurethane elastomer composition with high crystallization ability and its preparation, can solve the problems of poor crystallization ability and low crystallinity of TPU, achieve Vicat softening point improvement, and preparation process Simple, the effect of improving the tensile strength

Inactive Publication Date: 2018-06-01
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a thermoplastic polyurethane elastomer (TPU) composition with high crystallization ability and its preparation method, to solve the problem that the crystallization ability of TPU itself is not strong and the degree of crystallinity is not high, in order to improve the mechanical properties of TPU. Strength and heat resistance, broadening its field of application

Method used

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  • TPU (thermoplastic polyurethane) elastomer composition with high crystallization capacity and preparation method of TPU elastomer composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Select 0.5 parts of unmodified montmorillonite with an average sheet size of 0.02 micron, interlayer spacing of 0.3nm, and ion exchange capacity of 100mmol / 100g,

[0037] Mix with 100 parts of polyether thermoplastic polyurethane elastomer (purchased from Wanhua Chemical Group Co., Ltd., brand WHT-8170) with a hardness of 70A on a high-speed mixer, and extrude the mixture at a temperature of 160-180 ° C The montmorillonite-TPU composite material is obtained by melt blending and extruding on an extruder.

Embodiment 2

[0039]Select montmorillonite with an average sheet size of 0.02 microns, a layer spacing of 0.3 nm, and an ion exchange capacity of 100 mmol / 100 g, and disperse it in water, ultrasonically treat and stir to form a suspension. After standing still, remove the bottom sediment and take the upper layer suspension. Add C8 alkyl primary amine hydrochloride (octylamine hydrochloride) to the montmorillonite suspension, heat to 60°C and stir for 1 hour. After the reaction, the precipitate is washed with deionized water and dried to obtain Organic montmorillonite with modifier content of 30wt%. Take 0.5 part of organic montmorillonite and 100 parts of polyether thermoplastic polyurethane elastomer (same as Example 1) with a hardness of 70A and mix uniformly on a high-speed mixer. The mixture is melted, blended and extruded on an extruder with an extrusion temperature of 160-180° C. to obtain a montmorillonite-TPU nanocomposite material.

Embodiment 3

[0041] Select montmorillonite with an average sheet size of 1 micron, interlayer distance of 2 nm, and ion exchange capacity of 190 mmol / 100 g, disperse it in water, ultrasonically treat and stir to form a suspension. After standing still, remove the bottom sediment and take the upper layer suspension. Add C12 alkyl secondary amine hydrochloride (dilaurylamine hydrochloride) to the montmorillonite suspension, heat to 70°C and stir for half an hour. After the reaction, the precipitate is washed with deionized water and dried. An organic montmorillonite with a modifying agent content of 35 wt % was obtained. Take 1 part of organic montmorillonite and 100 parts of polyether thermoplastic polyurethane elastomer with a hardness of 95A (purchased from Wanhua Chemical Group Co., Ltd., brand WHT-8195) and mix them evenly on a high-speed mixer. The mixture is melted, blended and extruded on an extruder with an extrusion temperature of 180-200° C. to obtain a montmorillonite-TPU nanoco...

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Abstract

The invention relates to TPU (thermoplastic polyurethane) elastomer composition with high crystallization capacity. The composition is characterized by being prepared from 100 parts by weight of TPU elastomers and 0.1-20 parts by weight of layered inorganic compounds, wherein preferably, the layered inorganic compounds are modified layered inorganic compounds treated with an organic ion intercalation modifier, and the dosage of the organic ion intercalation modifier is 10wt%-60wt%, preferably, 30wt%-50wt%, of the modified layered inorganic compounds. The crystallization peak temperature of theTPU composition with high crystallization capacity can be increased by 10 DEG C or more, and degree of crystallinity is increased by 10% or higher.

Description

technical field [0001] The invention belongs to the field of thermoplastic elastomer composite materials, in particular to a thermoplastic polyurethane elastomer composition with high crystallization ability and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a thermoplastic elastomer that can be melt-processed. It can maintain high elasticity in a wide range of hardness, has good mechanical strength and excellent wear resistance, in addition, TPU also has excellent oil resistance, aging resistance and low temperature resistance. Therefore, it is widely used in automobile industry, machinery industry, medical industry, transportation, sporting goods and so on. [0003] TPU is a linear block macromolecule. The microstructure is a microphase-separated structure composed of hard segment phase and soft segment phase, wherein the hard segment phase is formed by the reaction of chain extender and diisocyanate, and the sof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08K7/00C08K3/34C08K9/04C08K3/30C08K3/26
CPCC08K3/26C08K3/30C08K3/34C08K3/346C08K7/00C08K9/04C08K2003/3009C08K2201/005C08L75/08C08L75/06
Inventor 张元珂付小亮黄岐善翟志斌陈玉兵咸鹤武
Owner WANHUA CHEM GRP CO LTD
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