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Low-glossiness thermoplastic polyurethane composition and preparation method and application thereof

A technology of thermoplastic polyurethane and thermoplastic polyester, which is applied in the field of low-gloss thermoplastic polyurethane composition and its preparation, and can solve the problems of poor processability, reduced mechanical properties, and poor uniformity of matting effect of cross-linked elastomers

Active Publication Date: 2017-07-07
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main means to solve the above needs is to add rubber powder with poor compatibility or elastomers that can form cross-linked structures, etc., such as patent CN102199343A by adding a certain amount of SEBS to achieve the purpose of extinction; patent CN103450662A by adding a certain amount of EPDM To achieve the purpose of matting, due to the poor compatibility between the matting agent and TPU, its addition amount is relatively high, resulting in a decrease in the mechanical properties of the material. Generally, a certain amount of compatibilizer needs to be added; at the same time, the rubber powder or cross-linked structural elastomer Poor processing performance, poor mixing uniformity, poor uniformity of matting effect, and there are problems such as rough surface and non-melting colloidal particles

Method used

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  • Low-glossiness thermoplastic polyurethane composition and preparation method and application thereof
  • Low-glossiness thermoplastic polyurethane composition and preparation method and application thereof

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preparation example Construction

[0090] The composition is prepared by melt blending with a twin-screw extruder, and the physical property test samples are processed and prepared by a conventional injection molding machine.

[0091] 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.

[0092] Mechanical properties were tested according to ASTM D412.

[0093] Test the hardness of the test piece according to ASTM D2240.

Embodiment 1

[0095] According to mass percentage, 95% of thermoplastic polyester polyurethane (1185EC), 3% of polybutylene terephthalate and 2% of nanometer calcium carbonate are uniformly mixed. the mixed composition in the Melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-235°C. The extruded strip is cooled by water, air-dried, and pelletized to obtain composition particles. After the pellets were dried at 80 °C for 16 h, test samples were prepared and their related properties were tested.

Embodiment 2

[0097] According to mass percentage, 85% of thermoplastic polyester polyurethane (1185EC), 10% of polybutylene terephthalate and 5% of nanometer calcium carbonate are uniformly mixed. the mixed composition in the Melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-235°C. The extruded strip is cooled by water, air-dried, and pelletized to obtain composition particles. After the pellets 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 low-glossiness thermoplastic polyurethane composition and a preparation method and application thereof. The low-glossiness thermoplastic polyurethane composition comprises, by mass percentage, 50-95% preferably 70-85% of thermoplastic polyurethane elastomer, 3-45% preferably 10-20% of thermoplastic polyester polymer and 1-20% preferably 5-10% of inorganic filler. The preparation method includes: melting and blending the components according to a certain proportion to obtain composition granules, and using melt extrusion equipment to extrude sheets of about 1mm. The low-glossiness thermoplastic polyurethane composition has the advantages that standard ASTM D523 tests show that the 60-degree-angle surface glossiness of the composition is lower than 30Gs, and the composition is good in mechanical performance and machining performance, even and fine and smooth in surface dulling effect, smooth in touch and suitable for being used for producing cables, pipes, belts and thin film products.

Description

technical field [0001] The invention relates to a thermoplastic polyurethane composition and its preparation method and application, in particular to a low-gloss thermoplastic polyurethane composition and its preparation method and application. 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 weather resistance, is not easy to age, harden and crack, and has the same characteristics of wear resistance, softness and good weather resistance as rubber, but its processing technology is much simpler than rubber. It can be processed repeatedly like plastic materials 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, automotive cables, geolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L67/02C08K3/34C08K3/26
CPCC08K2201/011C08L75/06C08L75/08C08L2205/02C08L67/02C08K2003/265C08K3/34C08K3/346
Inventor 杨永柱黄岐善付小亮翟志斌李栋
Owner WANHUA CHEM GRP CO LTD
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