CN102101923B - Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene - Google Patents
Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene Download PDFInfo
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- CN102101923B CN102101923B CN 201010159027 CN201010159027A CN102101923B CN 102101923 B CN102101923 B CN 102101923B CN 201010159027 CN201010159027 CN 201010159027 CN 201010159027 A CN201010159027 A CN 201010159027A CN 102101923 B CN102101923 B CN 102101923B
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- polyethylene wax
- polyethylene
- fusing point
- byproduct
- melting
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Abstract
The invention provides a method for raising the melting point of polyethylene wax which is byproduct in preparation of polyethylene. After polyethylene wax as the byproduct is recrystallized by adopting a method of adding a nucleating agent high-melting-point polyethylene and then recrystallizing, the melting point of an obtained product is raised to 100.7-129.2 DEG C. The obtained product can be applied to machining of color master batches and ink and can serve as high-grade polishing wax for automobiles and fur clothing, therefore, the application field of polyethylene wax is expanded, the added value of the product is increased, and economic value is greatly increased.
Description
Technical field
The invention belongs to technical field of polymer materials, particularly relate to polyethylene byproduct polyethylene wax through auxiliary agent and recrystallization modification and improve the method for its fusing point.
Background technology
At present, the fusing point of polyethylene by product low-melting-point polyethylene wax is generally 69-85 ℃, utilization to polyethylene by product low-melting-point polyethylene wax, only be to make wax disk(-sc) after its processing of simply decolouring, as low side purposes such as the insulating compound of the lubricant of plastic working and electrical condenser, transformer winding and non-blushing thinners, can not satisfy the processing of Masterbatch and printing ink uses the fusing point of polyethylene wax in the requirement of the high heat resistance more than 100 ℃ and high workability, therefore use range is narrow, price is low, product of poor benefits.Chinese patent CN200410043806.5 provides a kind of method of cutting apart polyethylene wax, polyethylene wax can be divided into the various piece of different molecular-weight average, although the polyethylene wax fusing point after cutting apart increases, but its solvent for use toxicity is large, complex operation step, cost is high, the industrialization difficulty.
Summary of the invention
The present invention is intended to solve the deficiencies in the prior art, and a kind of method that improves the polyethylene byproduct polyethylene wax fusing point is provided.
A kind of method that improves the polyethylene byproduct polyethylene wax fusing point, its step and condition are as follows:
1), nucleator is carried out pre-treatment: after the nucleator porphyrize is become particle diameter 100-200 order, carry out drying treatment at 80 ℃ of constant temperature;
2), in the device with agitator, add fusing point and be 69-85 ℃ polyethylene wax and be that the high melting-point polyolefins of the 0-7.0% of polyethylene wax quality carries out melting, the fusion time is 30min, temperature is 180 ℃;
3), after the complete melting of raw material, under 180 ℃ of constant temperatures, are nucleators of polyethylene wax quality 0.1-0.5% minutes 2 times average addings, add the quality optimization 0.2-0.4% of nucleator;
4), molten mass is stirred;
5), the temperature of molten system dropped to 140 ℃ with 5 ℃/minutes speed carry out crystallization, keep 100min, obtain the polyethylene wax recrystallization product that fusing point improves;
Described nucleator is calcium stearate, Zinic stearas, 1,3; 2,4-dibenzal sorbitol (production of Switzerland Ciba company) and stearic acid are one kind of;
Described high melting-point polyolefins is that fusing point is the polypropylene that 140-180 ℃ polyethylene or fusing point are 155-165 ℃.
Obtain the fusing point of the polyethylene wax recrystallization product of fusing point raising, match the accurate micro melting point apparatus mensuration of X-6 that hundred AudioCodes skill company limiteds produce, intensification voltage 100v with Beijing.
Beneficial effect: the method that adopts raising polyethylene byproduct polyethylene wax fusing point provided by the invention, the by-product polyethylene wax is carried out after recrystallization processes, the fusing point of product is brought up to 100.7-129.2 ℃, it can be applied to Masterbatch and printing ink processing, the high-grade polishing wax of automobile and fur clothing, price per ton increases Renminbi 1000-3000 unit.
Embodiment
Embodiment 1
1), nucleator is carried out pre-treatment: after nucleator stearic acid porphyrize is become particle diameter 100 orders, carry out drying treatment at 80 ℃ of constant temperature;
2), in the device with agitator, polyethylene wax (the Jilin connection power industry and trade company limited produces) 20.00g that adds fusing point and be 69-85 ℃ carries out melting, the fusion time is 30min, temperature is 180 ℃;
3), after the complete melting of raw material, under 180 ℃ of constant temperatures, are nucleator stearic acid 0.04g through pre-treatment of polyethylene wax quality 0.2% minutes 2 times average addings;
4), molten mass is stirred;
5), the temperature of molten system dropped to 140 ℃ with 5 ℃/minutes speed carry out crystallization, keep 100min, obtain fusing point and be 102.7-105.2 ℃ polyethylene wax recrystallization product;
The nucleator of embodiment 2 0.1-0.5%, the quality optimization 0.2-0.4% of adding nucleator;
Concrete operation step is identical with embodiment 1, and just nucleator is 120 purposes, and quality is the zinc stearate of polyethylene wax quality 0.1%, and the melting range scope that obtains polyethylene wax recrystallization product is 101.1-114.3 ℃.
Embodiment 3
Concrete operation step is identical with embodiment 1, and just nucleator is 140 purposes, and quality is the calcium stearate of polyethylene wax quality 0.2%, and the melting range scope that obtains polyethylene wax recrystallization product is 100.5-110.4 ℃.
Embodiment 4
Concrete operation step is identical with embodiment 1, and just nucleator is 200 purposes, and quality is 1 of polyethylene wax quality 0.4%,
3; 2,4-dibenzal sorbitol, the melting range scope that obtains polyethylene wax recrystallization product is 110.6-122.6 ℃.
Embodiment 5
1), nucleator is carried out pre-treatment: with nucleator 1,3; After 2,4-dibenzal sorbitol porphyrize becomes particle diameter 200 orders, carry out drying treatment at 80 ℃ of constant temperature;
2), in the device with agitator, add fusing point and be 69.3-82.5 ℃ polyethylene wax (Jilin connection power industry and trade company limited produces) 20.00g and be that 3.0% high-melting-point polypropylene 0.6g of polyethylene wax quality carries out melting, fusion time is 30min, and temperature is 180 ℃;
3), after the complete melting of raw material, under 180 ℃ of constant temperatures, are nucleators 1,3 through pre-treatment of polyethylene wax quality 0.2% minutes 2 times average addings; 2,4-dibenzal sorbitol 0.04g;
4), molten mass is stirred;
5), the temperature of molten system dropped to 140 ℃ with 5 ℃/minutes speed carry out crystallization, keep 100min, obtain fusing point and be 100.7-110 ℃ polyethylene wax recrystallization product;
Embodiment 6
Concrete operation step is with embodiment 5, and just the polyacrylic adding proportion of high-melting-point is 5%, and adding is the nucleator through pre-treatment of polyethylene wax quality 0.3%, and the melting range that obtains polyethylene wax recrystallization product is 103.1-125.5 ℃.
Embodiment 7
Concrete operation step is with embodiment 5, concrete operation step is with embodiment 5, just the polyacrylic adding proportion of high-melting-point is 7%, and adding is the nucleator through pre-treatment of polyethylene wax quality 0.3%, and the melting range that obtains polyethylene wax recrystallization product is 102.9-129.2 ℃.
Be to add high melting point polyethylene, adding proportion is 6%, and adding is the nucleator through pre-treatment of polyethylene wax quality 0.5%, and the melting range that obtains polyethylene wax recrystallization product is 102.3-124.6 ℃.
Embodiment 8
Concrete operation step is with embodiment 5, and just the polyacrylic adding proportion of high-melting-point is 7%, and adding is the nucleator through pre-treatment of polyethylene wax quality 0.3%, and the melting range that obtains polyethylene wax recrystallization product is 102.9-129.2 ℃.
Claims (2)
1. a method that improves the polyethylene byproduct polyethylene wax fusing point is characterized in that, its step and condition are as follows:
1), nucleator is carried out pre-treatment: after the nucleator porphyrize is become particle diameter 100-200 order, carry out drying treatment at 80 ℃ of constant temperature;
2), in the device with agitator, add fusing point and be 69-85 ℃ polyethylene wax and be that the high melting-point polyolefins of the 0-7.0% of polyethylene wax quality carries out melting, the fusion time is 30min, temperature is 180 ℃;
3), after the complete melting of raw material, under 180 ℃ of constant temperatures, are nucleators of polyethylene wax quality 0.1-0.5% minutes 2 times average addings;
4), molten mass is stirred;
5), the temperature of molten system dropped to 140 ℃ with 5 ℃/minutes speed carry out crystallization, keep 100min, obtain the polyethylene wax recrystallization product that fusing point improves;
Described nucleator is calcium stearate, Zinic stearas, 1,3; 2,4-dibenzal sorbitol and stearic acid are one kind of;
Described high melting-point polyolefins is that fusing point is the polypropylene that 140-180 ℃ polyethylene or fusing point are 155-165 ℃;
Described polyethylene byproduct polyethylene wax fusing point is brought up to 100.7-129.2 ℃.
2. a method that improves the polyethylene byproduct polyethylene wax fusing point is characterized in that, described step 3), are nucleators of polyethylene wax quality 0.2-0.4% minute 2 average addings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010159027 CN102101923B (en) | 2010-04-29 | 2010-04-29 | Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010159027 CN102101923B (en) | 2010-04-29 | 2010-04-29 | Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene |
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| Publication Number | Publication Date |
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| CN102101923A CN102101923A (en) | 2011-06-22 |
| CN102101923B true CN102101923B (en) | 2013-02-20 |
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| CN 201010159027 Expired - Fee Related CN102101923B (en) | 2010-04-29 | 2010-04-29 | Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030075457A (en) * | 2002-03-19 | 2003-09-26 | 한국화학연구원 | The preparation of low molecular weight polyethylene wax particle by emulsion crystallization |
| CN1597716A (en) * | 2004-08-13 | 2005-03-23 | 刘喜军 | Method of separating polyethylene wax |
| CN101333414A (en) * | 2008-08-05 | 2008-12-31 | 无锡信达胶脂材料有限公司 | Coatings wax of high melting point and method for preparing same |
-
2010
- 2010-04-29 CN CN 201010159027 patent/CN102101923B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030075457A (en) * | 2002-03-19 | 2003-09-26 | 한국화학연구원 | The preparation of low molecular weight polyethylene wax particle by emulsion crystallization |
| CN1597716A (en) * | 2004-08-13 | 2005-03-23 | 刘喜军 | Method of separating polyethylene wax |
| CN101333414A (en) * | 2008-08-05 | 2008-12-31 | 无锡信达胶脂材料有限公司 | Coatings wax of high melting point and method for preparing same |
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| CN102101923A (en) | 2011-06-22 |
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Granted publication date: 20130220 Termination date: 20140429 |