Cross blend material based on polycarbonate and its prepn. method

A polycarbonate and blending technology, applied in the field of polycarbonate blended materials, can solve problems such as high melting point, low mechanical properties, and easy stress cracking of products, and achieve good surface finish, good mechanical properties, and good Effect of Boiling Water Aging Resistance

Inactive Publication Date: 2003-05-07
上海天原集团胜德塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In general, PC has excellent performance, but it has the disadvantages of high melting point, poor processing performance, easy stress cracking of products, sensitivity to notch, high price, and low boiling water aging resistance.
PC / ABS alloy solves some of the above-mentioned shortcomings of PC, but PC / ABS also has the disadvantages of poor aging resistance, especially low impact performance after boiling water aging
PC / PE alloy has good boiling water aging resistance, but the mechanical properties of PC / PE are lower than those of PC and PC / ABS. At the same time, PC and PE are two polymers with poor compatibility, and the products are easy to delaminate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1000 grams of polycarbonate (PC) after drying treatment (Makrolon 2858, produced by BAYER, Germany) is injected according to the ASTM test standard (the temperature of the injection molding machine is set as: one stage: 235 ° C, two stages: 240 ° C, three stages: 245 ℃ four sections: 245 ℃ nozzle: 250 ℃), prepare the test sample. The test of tensile strength and flexural modulus adopts the electronic tensile machine manufactured by INSTON Company, and the test of Izod notched impact strength adopts the impact experiment manufactured by Ray-Ran Company. The test results are shown in Table 1.

Embodiment 2

[0037] 800 grams of polycarbonate (PC) (Makrolon 2858, produced by BAYER, Germany) after the drying process, 200 grams of acrylonitrile-butadiene-styrene copolymer (ABS) (ABS757, produced by Chi Mei, Taiwan) are mixed uniformly, and then Pour the mixture into a twin-screw extruder (SHL-35 type) to melt and knead, cool and granulate to obtain blended pellets (the temperature settings of each section of the extruder are respectively, the first stage: 230 ° C, the second stage: 235°C three sections: 240°C four sections: 240°C die head: 235°C).

[0038] The blended pellets were dried in a common oven at 100°C for 10 hours and then cooled to room temperature naturally. Then according to the ASTM test standard, the blended pellets were injected, and the temperature of the injection molding machine was set as: one stage: 235°C, two stages: 240°C, three stages: 245°C, four stages: 245°C, nozzle: 250°C), and prepared into test samples . The test of tensile strength and flexural modul...

Embodiment 3

[0040] 800 grams of polycarbonate (PC) (Makrolon 2858, produced by BAYER, Germany) after the method of Example 1 is used for drying, and 200 grams of low-density polyethylene (LDPE) (Q200, produced by Shanghai Petrochemical Co., Ltd.) are mixed uniformly, and then Pour the mixture into a twin-screw extruder (SHL-35 type) to melt and knead, cool and granulate to obtain blended pellets (the temperature settings of each section of the extruder are respectively, the first stage: 230 ° C, the second stage: 235 ℃ three sections: 240℃ four sections: 240℃ die head: 235℃). The blended pellets were dried in a common oven at 100°C for 10 hours and then cooled to room temperature naturally. Then according to the ASTM test standard, the blended pellets were injected, and the temperature of the injection molding machine was set as: one stage: 235°C, two stages: 240°C, three stages: 245°C, four stages: 245°C, nozzle: 250°C), and prepared into test samples . The test of tensile strength and...

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Abstract

A polycarbonate-base mixture suitable for the engineering plastics in wet or hot water environment is prepared through mixing polyethene with maleic acid anhydride modified polyolefine or ionic polymer, kneading, granulating, mixing with polycarbonate and acrylonitrile-butadiene-styrene copolymer, and extruding out. Its advantages are high mechanical performance, size stability and refractory nature, and high antiageing nature in boiling water.

Description

technical field [0001] The invention relates to a blend material based on polycarbonate, in particular to a polycarbonate / polyethylene / acrylonitrile-butadiene-styrene copolymer polymer alloy material and a preparation method thereof. Background technique [0002] Polycarbonate is an engineering plastic with excellent performance. It has excellent mechanical properties, dimensional stability and heat resistance. It is widely used in manufacturing, electronics industry, automobile industry and other fields. However, due to the high melting point of PC, poor processing fluidity, easy stress cracking of products, strong sensitivity to notches, poor boiling water aging resistance, and high price, its application is limited to a certain extent. In order to solve the above problems, researchers have successively developed a series of polymer alloy materials based on polycarbonate, such as polycarbonate (PC) / acrylonitrile-butadiene-styrene copolymer disclosed in US patent [USP522357...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/20C08L69/00
Inventor 袁茂全李明黄风华章长明张勇李超勤
Owner 上海天原集团胜德塑料有限公司
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