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Method for preparing functionalized polyethylene wax

A polyethylene wax and functionalization technology, applied in the field of preparation of functionalized polyethylene wax, can solve the problems of high monomer activity, difficulty in large-scale production, low grafting temperature, etc., and achieve simple operation, convenient operation and wide application Effect

Inactive Publication Date: 2011-08-31
张燕妮 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solution grafting temperature is low and grafting efficiency is high, but there are problems such as solvent recovery and treatment, so it is difficult to carry out industrial production
[0009] Acrylic acid (AA) has strong polarity and is also a good modifier, but due to the high activity of the monomer, melt grafting is easy to cause self-polymerization, so it is difficult to produce on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 120

[0027] Example 120 parts of PEW and 100 parts of petroleum ether with a boiling point of 90-120°C were added to the reactor, under nitrogen protection, heated to 100°C for about 15 minutes, PEW melted and dispersed in petroleum ether. 7 parts of acrylic acid were added dropwise to the reactor, and the speed was controlled to complete the dropwise addition within 1 hour. 1 part of BPO was added three times at the beginning of the reaction, 30min, and 1h, and the reaction time was 3h to obtain a white emulsion. After cooling to room temperature (about 20°C), the white emulsion was allowed to stand for a period of time to separate layers, the supernatant liquid was taken out for recovery, and the white solid in the lower layer was vacuum-dried at 50°C to obtain the white product PEW-g-AA.

[0028] The product was extracted with acetone for 24 hours, 0.5 g was dissolved in hot xylene, then neutralized by adding NaOH-ethanol solution, using phenolphthalein as indicator, hydrochlori...

Embodiment 220

[0029] Example 220 parts of PEW and 100 parts of petroleum ether with a boiling point of 90-120°C were added to the reactor, under nitrogen protection, heated to 110°C for about 10 minutes, PEW melted and dispersed in petroleum ether. 8 parts of methacrylic acid were added dropwise to the reactor, and the rate was controlled to complete the dropwise addition within 1 hour. 1.1 parts of BPO were added three times at the beginning of the reaction, 30min, and 1h, and the reaction time was 4h to obtain a white emulsion. After cooling to room temperature (about 20°C), the white emulsion was allowed to stand for a period of time to separate layers, the supernatant liquid was taken out for recovery, and the white solid in the lower layer was vacuum-dried at 50°C to obtain the white product PEW-g-MAA.

[0030] The product was extracted with acetone for 24 hours, 0.5 g was dissolved in hot xylene, then neutralized by adding NaOH-ethanol solution, using phenolphthalein as indicator, hyd...

Embodiment 320

[0031] Example 320 parts of PEW and 100 parts of petroleum ether with a boiling point of 90-120°C were added to the reactor, under nitrogen protection, heated to 100°C for about 15 minutes, PEW melted and dispersed in petroleum ether. 7 parts of GMA were added dropwise to the reactor, and the rate was controlled to complete the dropwise addition within 1 h. 0.5 parts of BPO were added three times at the beginning of the reaction, 30 minutes and 1 hour respectively, and the reaction time was 3 hours to obtain a white emulsion. After cooling to room temperature (about 20°C), the white emulsion was allowed to stand for a period of time to separate layers, the supernatant liquid was taken out for recovery, and the white solid in the lower layer was vacuum-dried at 50°C to obtain the white product PEW-g-GMA.

[0032] The product was extracted with acetone for 24h, 0.5g was dissolved in hot xylene, then added hydrochloric acid-acetone solution, with phenolphthalein as indicator, NaO...

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Abstract

The invention discloses a method for functionalizing polyethylene wax. Petroleum ether is used as a solvent, and functionalized monomers are grafted in a solution. The polyethylene wax can be dissolved and dispersed in the petroleum ether at the temperature of between 90 DEG C and 120 DEG C and is completely separated out when cooled to room temperature; products can be conveniently separated by using difference in solubility; and the solvent can be recycled. Polyethylene wax-grafted-acrylic acid (PEW-g-AA), polyethylene wax-grafted-methacrylic acid (PEW-g-MAA), polyethylene wax-grafted-glycidyl methacrylate (PEW-g-GMA), polyethylene wax-grafted-maleic anhydride (PEW-g-MAH), polyethylene wax-grafted-acrylamide (PEW-g-AM), polyethylene wax-grafted-N-methylol acrylamide (PEW-g-NMAM) and products obtained by neutralization, namely polyethylene wax-grafted-acrylic acid sodium (PEW-g-AAS) and polyethylene wax-grafted-methacrylic acid sodium (PEW-g-AAS), are obtained. The grafting products can be applied to the aspects of polyolefin modification, polyethylene wax emulsion, ink coating and the like. The method has a simple process and can be applied to industrial production.

Description

technical field [0001] The invention relates to a preparation method of functionalized polyethylene wax, which belongs to the field of polymer modification. Background technique [0002] Polyethylene wax (PEW) is polyethylene with a low degree of polymerization, the molar mass is generally between 2000 and 10000g / mol, it has good chemical stability, and it has excellent temperature resistance, chemical resistance and electrical properties at room temperature. Relatively wide, it can be used as raw material of chlorinated polyethylene, plastic modifier, ink and coating, etc. In recent years, in order to improve the performance of PEW and broaden its application range, extensive research has been done on the modification of PEW. For example, after polyethylene wax is grafted with maleic anhydride, it can be applied to LDPE / CaCO3 system, which has a good coupling effect and improves the mechanical properties of the filling system [0003] Polyolefin has the advantages of low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08L23/00C08L51/06
Inventor 张燕妮许祥
Owner 张燕妮
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