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Thermoplastic polyurethane composition and preparation method thereof

A thermoplastic polyurethane and composition technology, applied in the field of low-gloss thermoplastic polyurethane composition and its preparation, can solve the problems of rough surface, low-gloss thermoplastic polyurethane, poor plasticizing effect and the like

Active Publication Date: 2017-05-03
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the defects of poor surface matting effect, poor plasticizing effect and rough surface in the prior art, and provide a low-gloss thermoplastic polyurethane composition and its preparation method

Method used

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  • Thermoplastic polyurethane composition and preparation method thereof

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Comparison scheme
Effect test

preparation example Construction

[0074] The preparation method of the thermoplastic polyurethane composition: through the melt blending of a twin-screw extruder, and the physical property test sample is processed and prepared through a conventional injection molding machine.

[0075] The test of gloss is measured by extruding a sheet with a thickness of about 1mm and a width of about 40mm by a single-screw extruder. According to ASTM D523, the surface gloss of the sheet was tested with a MN268 gloss meter.

[0076] Mechanical properties were tested according to ASTM D412.

[0077] Hardness was tested according to ASTM D2240.

Embodiment 1

[0079] According to the mass percentage, 90% of WHT-8185RV, 7% of SEBS (the number average molecular weight is 60,000) and 3% of FG1901GT were evenly mixed. the mixed composition in the The melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 180-210°C. The extruded strip is cooled by water, air-dried, and pelletized to obtain composition particles. After the particles were dried at 80 °C for 16 h, test samples were prepared and their related properties were tested.

Embodiment 2

[0081] According to the mass percentage, 88% of WHT-8185RV, 10% of SEBS (the number average molecular weight is 60,000) and 2% of FG1901GT were evenly mixed. the mixed composition in the The melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 180-210°C. The extruded strip is cooled by water, air-dried, and pelletized to obtain composition particles. After the particles were dried at 80 °C for 16 h, test samples were prepared and their related properties were tested.

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Abstract

The invention relates to a thermoplastic polyurethane composition and a preparation method thereof. The composition comprises the following substances by the mass percentage: (a) 55-90% of a thermoplastic polyurethane elastomer, (b) 7-40% of a copolymer, and (c) 2-8% of a compatilizer. The copolymer is selected from one or more of the following polymers: SBS, SEBS, SIS and SEPS with the number-average molecular weight of 50 thousand-100 thousand. In addition, EPDM with the weight-average molecular weight of 100 thousand-400 thousand can be added and can cooperate with the copolymer, and in the premise of relatively low copolymer amount, better extinction effect is achieved. According to the ASTM D523 standard, the surface glossiness of the angle of 60 degrees is tested to be less than 10 Gs, and the lowest reaches 0; and the material has good mechanical properties and processing performance, and is suitable for preparation of wire cables, pipes, belts and thin film products.

Description

technical field [0001] The invention relates to a thermoplastic polyurethane composition and a preparation method thereof, in particular to a low gloss thermoplastic polyurethane composition and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane is widely used in wire and cable sheathing below 1KV, and it has good physical and mechanical properties. In the process of use, polyurethane has many advantages. It has good environmental resistance, is not easy to age, harden and crack, and has the same characteristics of wear resistance, softness and weather resistance as rubber, but its processing technology is simpler than rubber. Much, it can be processed repeatedly like a plastic material without vulcanization. At the same time, it has excellent toughness, oil resistance, low temperature flexibility, thermal stability, etc. Therefore, it is widely used in power energy cables, communication cables, automobile cables, geological exploration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L53/02C08L23/16C08L51/06C08L51/00
Inventor 杨永柱黄岐善翟志斌李栋
Owner WANHUA CHEM GRP CO LTD
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