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High-performance thermoplastic elastomer and processing method thereof

A thermoplastic elastomer and processing method technology, applied in the field of thermoplastic elastomers, can solve the problems of easy discoloration of products, poor weather resistance and yellowing resistance, material decomposition, etc., so as to improve softness and peel strength, and have excellent weathering and yellowing resistance. , the effect of reducing the melt temperature

Active Publication Date: 2014-12-10
安特普工程塑料(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, thermoplastic polyurethane TPU and its alloy elastomers are usually used to achieve the purpose of encapsulating ABS, PC / ABS, PMMA and PC, etc., but TPU and its alloy products have the following shortcomings: poor weather resistance and yellowing resistance, and products are easy to change color , can not meet the requirements of outdoor and product color applications; TPU processing parameters have a great impact on the performance of the product, TPU and its alloys are sensitive to heat and moisture during processing, easy to decompose, and cause air marks on the surface of the product
However, the processing temperature range of TPU and its alloys is only 190 degrees to 220 degrees, which cannot be applied to some complex products and thin-walled products
If the processing temperature of TPU and its alloys is too high, or the residence time in the barrel is too long, it will also cause the material to decompose, resulting in surface air marks, yellowing, and even a serious decline in the physical properties of the material.
The yellowing resistance of TPU and its alloys is very poor, and it can hardly be used in outdoor products, light-colored products and places with high color stability requirements

Method used

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  • High-performance thermoplastic elastomer and processing method thereof

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specific Embodiment 1

[0014] A high-performance thermoplastic elastomer and its processing method. After fully mixing 10 parts by weight of high molecular weight SEBS and 10 parts by weight of paraffin-based rubber filler oil and absorbing the oil for 30 minutes, because the kinematic viscosity of the rubber filler oil affects the appearance and feel. With a decisive effect, it needs to fully absorb oil with high molecular weight SEBS before mixing with other ingredients, then add 70 parts by weight of polyester elastomer, 5 parts by weight of maleic anhydride grafted SEBS, and 5 parts by weight of stabilizer, Put it into the mixer and mix evenly, then put the above mixed material into the feeding hopper of the extruder for extrusion processing. For screw extruders, the screw speed is moderate, too low speed is not conducive to the uniform dispersion of the product, and too high speed will cause too strong shear and cause the risk of physical property degradation of the product. The processing temp...

specific Embodiment 2

[0015] The raw materials and their proportioning in specific embodiment 1 are changed into the following ratios, and the components and parts by weight are: polyester elastomer TPEE: 35 parts; high molecular weight SEBS: 30 parts; maleic anhydride grafted SEBS: 2 parts; Paraffin-based rubber filler oil: 20 parts; calcium carbonate: 13 parts. Processing step is with reference to specific embodiment 1.

specific Embodiment 3

[0016] The raw materials and their proportioning in specific embodiment 1 are changed into the following ratios, and the components and parts by weight are: polyester elastomer TPEE: 50 parts; SEPS: 20 parts; maleic anhydride grafted SEBS: 5 parts; naphthene Base rubber filler oil: 20 parts; talcum powder: 2.5 parts; stabilizer 2.5 parts. Processing step is with reference to specific embodiment 1.

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Abstract

The invention provides a high-performance thermoplastic elastomer and a processing method thereof. The high-performance thermoplastic elastomer comprises the following components in parts by weight: 20-100 parts of polyether elastomer TPEE, 0-70 parts of styrene elastomer, 0-30 parts of maleic anhydride-grafted SEBS, 0-50 parts of rubber filling oil, 0-40 parts of mineral powder and 0-5 parts of a stabilizer. The thermoplastic elastomer with high strength and stable performance can be produced by virtue of different raw materials and proportions; a processing process temperature (190-260 DEG C) of the high-performance thermoplastic elastomer is wider in range in comparison with that of the conventional TPU (thermoplastic polyurethane) and an alloy product thereof. The adopted extruder screw head can be used for lowering the melt temperature, lowering the material decomposition and promoting the materials to uniformly mix, so that obtained high-performance thermoplastic elastomer is high in strength, stable in performance, excellent in weather resistance and yellowing resistance, and excellent in rubber coating effect.

Description

technical field [0001] The invention belongs to the technical field of new polymer material manufacturing, and in particular relates to a thermoplastic elastomer with stable performance, high strength and excellent weather resistance and yellowing resistance. Background technique [0002] At present, thermoplastic polyurethane TPU and its alloy elastomers are usually used to achieve the purpose of encapsulating ABS, PC / ABS, PMMA and PC, etc., but TPU and its alloy products have the following shortcomings: poor weather resistance and yellowing resistance, and products are easy to change color , can not meet the requirements of outdoor and product color; TPU processing parameters have a great impact on the performance of the product, TPU and its alloys are sensitive to heat and moisture during processing, easy to decompose, and cause air marks on the product surface. Specifically, the suitable processing temperature of TPU and its alloys is very narrow, usually between 190 deg...

Claims

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Application Information

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IPC IPC(8): C08L67/00C08L53/02C08L51/00C08K13/02C08K3/26C08K3/34B29C47/92B29C48/92
Inventor 刘道龙
Owner 安特普工程塑料(苏州)有限公司
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