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High-heat-resistance thermoplastic polyurethane elastomer composition, preparation method and application thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of thermoplastic polyurethane elastomer composition and its preparation, can solve the problems of molecular chain scission, other adverse effects on performance, inability to guarantee the long-term thermal aging characteristics of TPU, etc., and achieves improved thermal aging resistance. performance effect

Active Publication Date: 2020-06-16
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned method of introducing unsaturated active functional groups into the TPU molecular chain through the synthesis method can prepare cross-linkable TPU. However, a large number of molecular chains will still be broken under long-term heat bombardment, which cannot guarantee the long-term thermal aging characteristics of TPU.
In addition, changes in the molecular structure of TPU may have adverse effects on other properties, and the large limitations of the molecular structure make it impossible to impart a cross-linked structure to ordinary TPU materials

Method used

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  • High-heat-resistance thermoplastic polyurethane elastomer composition, preparation method and application thereof
  • High-heat-resistance thermoplastic polyurethane elastomer composition, preparation method and application thereof
  • High-heat-resistance thermoplastic polyurethane elastomer composition, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]87wt% polyether thermoplastic polyurethane elastomer (WHT-8185RV, hardness 85A, Wanhua Chemical Group Co., Ltd.) and 10wt% sensitizer TMPTMA (RYOJI TMPTMA, RYOJI Organic Chemicals), 3% heat-resistant additive 4- Vinylbenzocyclobutene (ChemTarget 4-vinylbenzocyclobutene, Mianyang Dagot Technology Co., Ltd.) was granulated by a co-rotating twin-screw extruder at an extrusion temperature of 190°C. The obtained composition was formed into a test piece with a thickness of 2 mm by using an injection molding machine, and the injection molding temperature was 180° C.

[0035] The obtained test piece was irradiated with an electron beam to induce cross-linking, and the irradiation dose was 150 kGy (GJ-2 accelerator, Sichuan Institute of Atomic Energy), and a cross-linked TPU test piece was obtained.

Embodiment 2

[0037] The preparation method is the same as that in Example 1, except that the sensitizer is TMPTA (Agisyn 2811, DSM, Netherlands).

Embodiment 3

[0039] The preparation method is the same as in Example 1, except that the sensitizer is TAIC (purity ≥ 98%, Shanghai Addition Chemical Co., Ltd.).

[0040] The obtained test piece was irradiated with an electron beam to induce crosslinking, and the irradiation dose was 50 kGy.

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Abstract

The invention relates to a thermoplastic polyurethane elastomer composition with high heat resistance, wherein the composition comprises (a) 75-95 wt% of a thermoplastic polyurethane elastomer, (b) 0.1-20 wt% of a sensitizer, and (c) 0.1-10 wt% of a heat-resistant auxiliary agent which can be cross-linked at a certain temperature, has excellent thermal aging resistance, and is suitable for wires,cables, pipe profiles, films and various molded products.

Description

technical field [0001] The invention belongs to the field of thermoplastic elastomer composite materials, and in particular relates to a thermoplastic polyurethane elastomer composition with high heat resistance and its preparation method and application. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a thermoplastic elastomer that can be melt-processed. It can maintain high elasticity, good mechanical strength and excellent wear resistance in a wide range of hardness, so it is widely used in the automotive industry , machinery industry, medical industry, transportation, sporting goods, etc. However, for TPU products exposed to chemicals, solvents and / or high temperatures, poor chemical resistance, heat resistance and oxidation resistance lead to a greatly shortened service life, and even cannot meet the needs of some fields Require. [0003] In response to the above problems, technicians have tried various solutions such as filling inorganic f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F222/14C08F212/32C08F226/06C08F230/08C08F2/54
CPCC08F283/006C08F2/54C08F212/32C08F226/06C08F230/08
Inventor 张晓亮付小亮黄岐善翟志斌戚大彬
Owner WANHUA CHEM GRP CO LTD