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Method for producing wax with co-cracking of multiple plastics and resins

A plastic resin and co-pyrolysis technology, applied in the field of dewaxing, can solve the problem of high price, achieve the effect of simple production operation, good comprehensive performance and wide range of uses

Inactive Publication Date: 2009-04-08
上海五将化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, due to the limitation of technical level, the quality of domestic polyolefin wax still has a certain gap with that of foreign similar products, so foreign products still occupy a large part of the market despite their high prices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) cracking method:

[0045] (1) 40% polyethylene, 30% polypropylene and 30% EVA three raw materials are put into the reactor;

[0046] (2) The reactor is evacuated and filled with nitrogen to 100kPa;

[0047] (3) Use an oil bath to heat the raw materials in the kettle;

[0048] (4) stir while heating until the raw materials are completely melted;

[0049] (5) The temperature is controlled at 300-400°C and kept at constant temperature for 7 hours;

[0050] (6) Stop heating and when the temperature drops below 200°C, the released product is a wax product;

[0051] (7) Test product performance.

[0052] (2) The properties of cracking products are:

[0053] Dropping melting point, ℃ 144.5

[0054] Penetration, 25°C, 100g, 0.1mm 3.72

[0055] Viscosity average molecular weight, 135°C 4320

[0056] Impurities, % <1.8

Embodiment 2

[0058] (1) cracking method:

[0059] (1) 50% polyethylene and 50% polyamide two raw materials are put into the reactor;

[0060] (2) The reactor is evacuated and filled with nitrogen to 100kPa;

[0061] (3) Use an oil bath to heat the raw materials in the kettle;

[0062] (4) stir while heating until the raw materials are completely melted;

[0063] (5) The temperature is controlled at 350-450°C and kept at constant temperature for 8 hours;

[0064] (6) Stop heating and when the temperature drops below 200°C, the released product is a wax product;

[0065] (7) Test product performance.

[0066] (2) The properties of cracking products are:

[0067] Dropping melting point, ℃ 102

[0068] Penetration, 25°C, 100g, 0.1mm 4.13

[0069] Viscosity average molecular weight, 135°C 3925

[0070] Impurities, % <1.8

Embodiment 3

[0072] (1) cracking method:

[0073] (1) 50% polypropylene, two kinds of raw materials of polyvinyl chloride of 50% are put into reactor;

[0074] (2) The reactor is evacuated and filled with nitrogen to 100kPa;

[0075] (3) Use an oil bath to heat the raw materials in the kettle;

[0076] (4) stir while heating until the raw materials are completely melted;

[0077] (5) The temperature is controlled at 300-400°C and kept at constant temperature for 7 hours;

[0078] (6) Stop heating and when the temperature drops below 200°C, the released product is a wax product;

[0079] (7) Test product performance.

[0080] (2) The properties of cracking products are:

[0081] Dropping melting point, ℃ 139

[0082] Penetration, 25°C, 100g, 0.1mm 3.94

[0083] Viscosity average molecular weight, 135°C 4150

[0084] Impurities, % <1.8

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Abstract

The invention discloses a method for preparing wax from multiple plastic resins by copyrolysis. Raw material of polyolefin is put into a reaction kettle; the reaction kettle is vacuumized and then filled with nitrogen until the pressure reaches 100kPa; raw material in the kettle is heated by a method of oil-bath or infrared ray until the raw material comes to a total fusion; the temperature is controlled between 300 DEG C to 450 DEG C and maintained constant for 0.5 hour to 10 hours; heating is stopped, the temperature is reduced below 200 DEG C and the raw material which is the wax is discharged; and the performance of the product is tested. The method has the advantages of high heat distortion point, high rigidity, high tenacity, lubricating property, wet fastness and the like; and the method also has simple production operation and wide application.

Description

【Technical field】 [0001] The invention relates to the field of decomposing wax, in particular to a method for co-cracking multiple plastic resins to produce wax. 【Background technique】 [0002] Polyolefin wax (such as polyethylene wax, polypropylene wax, EVA wax, etc.) is a low molecular weight polyolefin, which is a non-toxic, odorless, non-corrosive white or light yellow wax, usually with a molecular weight of 500 ~10000. Polyolefin wax has good chemical stability, thermal stability and moisture resistance, low melt viscosity and excellent electrical properties, so it is widely used as a good processing aid in rubber, plastics, fibers, coatings, inks, pharmaceuticals , additives for food processing and casting of precision instruments. The multiple uses of polyolefin waxes such as polyethylene wax, polypropylene wax and EVA wax have greatly increased their consumption. However, there are not many manufacturers of polyolefin waxes such as polyethylene wax, polypropylene w...

Claims

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Application Information

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IPC IPC(8): C08F8/50C08J11/10
CPCY02W30/62
Inventor 张硕鹏杨慧英陈盛郑义红李慧慧段翠翠王瑾李红张建雨
Owner 上海五将化工科技有限公司
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