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High-fluidness PC/TPU (polycarbonate/thermoplastic urethane) alloy material and preparation method thereof

An alloy material and high fluidity technology, applied in the field of high fluidity PC/TPU alloy material and its preparation, can solve the problems of large melt viscosity processing, notch impact sensitivity, poor solvent resistance, etc., and achieve low cost and convenient operation , Excellent effect of solvent resistance

Inactive Publication Date: 2012-07-25
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because bisphenol A polycarbonate contains benzene rings in the molecular chain, the molecular chain is rigid, which makes its melt viscosity larger, inconvenient to process, prone to stress cracking and notch impact sensitivity, and it also has poor solvent resistance and poor wear resistance.

Method used

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  • High-fluidness PC/TPU (polycarbonate/thermoplastic urethane) alloy material and preparation method thereof
  • High-fluidness PC/TPU (polycarbonate/thermoplastic urethane) alloy material and preparation method thereof
  • High-fluidness PC/TPU (polycarbonate/thermoplastic urethane) alloy material and preparation method thereof

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preparation example Construction

[0028] The preparation method of above-mentioned PC / TPU alloy material, comprises the following steps:

[0029] S1: Weigh each component according to the weight percentage content mentioned above;

[0030] S2: Mix the weighed components uniformly to form a mixed material;

[0031] S3: extruding and granulating the mixed material to obtain the high fluidity PC / TPU alloy material.

[0032] Specifically, in the above S1 step, the formulation of the PC / TPU alloy material of the present invention includes the above-mentioned formulation without additives or the formulation of another preferred embodiment containing additives. Among them, before weighing each component according to the above formula, it is preferable to dry the polycarbonate at a temperature of 120 ° C for 3 hours, or after weighing each component and before mixing each component, the weighed polycarbonate The ester was dried at 120°C for 3 hours. The purpose of preferably drying treatment is to minimize the part...

Embodiment 1

[0038] In this embodiment, the formula composition of PC / TPU alloy material percentage by weight of the present invention is as follows:

[0039] Polycarbonate with a preferred molecular weight of 38,000 60%, thermoplastic polyurethane elastomer with a Shore A hardness of 85HA 30%, polycarbonate polyurethane copolymer 4.5%, polyethylene octene co-elastomer 5%, pentaerythritol stearate- Methacrylic acid binary copolymer 0.5%.

[0040] The preparation method of above-mentioned PC / TPU alloy material is as follows:

[0041] S11: first dry the polycarbonate at 120°C for 3 hours, and then weigh each component according to the above PC / TPU alloy material formula;

[0042] S12: Mix the weighed components and put them in a mixer for 5 minutes until they are evenly mixed to form a mixed material;

[0043] S13: Add the mixed material into the hopper of the twin-screw extruder, extrude, and granulate to obtain a high-fluidity PC / TPU alloy material; the temperature of each section of the...

Embodiment 2

[0045] In this embodiment, the formula composition of PC / TPU alloy material percentage by weight of the present invention is as follows:

[0046] Polycarbonate with a preferred molecular weight of 30,000 60%, thermoplastic polyurethane elastomer with a Shore A hardness of 90HA 20%, polycarbonate polyurethane copolymer 10%, EPDM rubber 9.2%, pentaerythritol stearate-methyl Acrylic acid binary copolymer 0.8%.

[0047] The preparation method of above-mentioned PC / TPU alloy material is as follows:

[0048] S11: first dry the polycarbonate at 120°C for 3 hours, and then weigh each component according to the above PC / TPU alloy material formula;

[0049] S12: Mix the weighed components and put them in a mixer for 5 minutes until they are evenly mixed to form a mixed material;

[0050] S13: Add the mixed material into the hopper of the twin-screw extruder, extrude, and granulate to obtain a high-fluidity PC / TPU alloy material; the temperature of the mixed material in each section of t...

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Abstract

The invention discloses a high-fluidness PC / TPU (polycarbonate / thermoplastic urethane) alloy material and a preparation method thereof. The high-liquidity PC / TPU alloy material comprises the following compositions in percentage by weight: 60-80% of polycarbonate, 10-30% of thermoplastic polyurethane elastomer, 3-10% of compatilizer, 5-10% of toughening agent, and 0.5-1% of fluidness improver. The high-liquidity PC / TPU alloy material prepared by using the method disclosed by the invention concurrently has the advantages of PC and TPU, and is good in low-temperature impact resistance, coating performance and solvent resistance and excellent in fluidness; and the preparation method can be implemented in one step through granulation by using a double-screw blending extrusion process, so that the preparation method is simple in process, convenient to operate, high in efficiency, low in cost, and suitable for being applied to industrial production.

Description

[technical field] [0001] The invention relates to the field of polymer materials, in particular to a PC / TPU alloy material with high fluidity and a preparation method thereof. [Background technique] [0002] PC (Polycarbonate, polycarbonate) is an engineering plastic with excellent comprehensive properties. It has high dimensional stability, good electrical insulation and creep resistance, etc., and is widely used in machinery and electronics industries. However, because bisphenol A polycarbonate contains benzene rings in the molecular chain, the molecular chain is rigid, which makes its melt viscosity larger, inconvenient to process, prone to stress cracking and notch impact sensitivity, and it also has poor solvent resistance and poor wear resistance. . TPU (Thermoplastic polyurethanes, thermoplastic polyurethane elastomer) has excellent wear resistance, oil resistance and cold resistance. [0003] If the alloy material of PC and TPU can be obtained, this alloy material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L75/04B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92
Inventor 徐东徐永潘明熙
Owner SHENZHEN KEJU NEW MATERIAL
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