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A low-gloss thermoplastic polyurethane composition and its preparation method and application

A thermoplastic polyurethane and thermoplastic polyester technology, applied in the field of thermoplastic polyurethane composition and its preparation, can solve the problems of poor processing performance of cross-linked structural elastomer, poor uniformity of matting effect, poor compatibility of matting agent, etc., and achieve excellent mechanical properties. , The matting effect is uniform and delicate, and the processing is easy.

Active Publication Date: 2022-04-22
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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  • A low-gloss thermoplastic polyurethane composition and its preparation method and application

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0073] The composition is prepared by melt blending of a twin screw extruder, and the physical property test specimen is prepared by conventional injection molding machine processing.

[0074] The gloss test is measured by extruding a thin sheet with a thickness of about 1 mm and a width of about 40 mm by a single screw extruder. According to ASTM D523, the surface gloss of the sheet is tested with the MN268 gloss meter.

[0075] Mechanical properties tested according to ASTM D412.

[0076] Test the hardness of the specimen according to ASTM D2240.

Embodiment 1

[0078] Mix 95% thermoplastic polyester polyurethane (1185EC), 3% nylon 6 and 2% magnesium silicate according to the mass percentage. The mixed composition is melted and blended in a φ42mm co-rotating twin screw extruder at a blending temperature of 175-230 °C. Extruded splines are cooled by water and air-dried, pelletized to obtain composition particles. After drying the pellets at 80 °C for 16 h, test samples are prepared and their relevant properties are tested.

Embodiment 2

[0080] According to the mass percentage, 85% of the thermoplastic polyester polyurethane (1185EC), 10% of nylon 1010 and 5% of the sodium phosphate of the methyl bran bis (2,4-diltetylphenoxy) were mixed evenly. The mixed composition is melted and blended in a φ42mm co-rotating twin screw extruder at a blending temperature of 175-220 °C. Extruded splines are cooled by water and air-dried, pelletized to obtain composition particles. After drying the pellets at 80 °C for 16 h, test samples are prepared and their relevant properties are tested.

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Abstract

The invention relates to a thermoplastic polyurethane composition with low gloss and its preparation method and application. The composition comprises the following components in mass percentage, (A) 50%-95% thermoplastic polyurethane elastomer; (B) 3%-45% thermoplastic polyamide polymer or thermoplastic polyamide and thermoplastic polyester polymer Blend; (C) 1%-20% of the third component, the third component is selected from one or more of inorganic filler, polycarbonate powder, PTFE powder, organic (hypo)phosphate. According to the standard ASTM D523 test, the composition of the present invention has a 60° surface gloss of less than 30Gs, and the material has good mechanical properties and processing properties, the surface matting effect is uniform and delicate, and the hand feels smooth. It is suitable for preparing cables, pipes, belts and films. product.

Description

Technical field [0001] The present invention relates to a thermoplastic polyurethane composition and preparation method and application thereof, in particular to a low gloss thermoplastic polyurethane composition and preparation method and application thereof. Background [0002] Thermoplastic polyurethane (TPU) is widely used in wire and cable sheaths below 1kV, which have good physical and mechanical properties. In the process of use, polyurethane has many advantages, it has good weather resistance, not easy to age and harden and crack, has the same wear resistance, softness, weather resistance as rubber, but its processing technology is much simpler than rubber, can be repeatedly processed like plastic materials, without vulcanization. At the same time, it has excellent toughness, oil resistance, low temperature and gentleness, thermal stability and so on. Therefore, it is widely used in power energy cables, communication cables, automotive cables, geological exploration cabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08L75/04C08L75/08C08L77/02C08L77/06C08L67/02C08L67/00C08L27/18C08K3/34C08K3/22C08K5/04
CPCC08J5/18C08L75/04C08L75/06C08L75/08C08J2375/04C08J2375/06C08J2375/08C08L2205/03C08L2203/16C08L2203/18C08L2203/202C08K2201/003C08J2477/02C08J2477/06C08L2207/04C08L77/02C08L77/06C08L67/02C08L67/00C08L27/18C08K3/34C08K3/346C08K2003/222C08K5/04
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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