Preparation method of imidazole-containing cationic antistatic polyurethane

A technology containing imidazolium cations and ions, which is applied in the field of polymer material preparation and can solve problems such as static electricity accumulation, affecting product quality, and disasters

Active Publication Date: 2013-09-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The volume resistivity of polyurethane is generally between 10 13 ~10 15 Ω·cm, has good electrical insulation, but it is easy to generate static electricity accumulation through friction during use, electrostatic discharge and electromagnetic wave interference will cause a series of disasters
The static electricity accumulat

Method used

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  • Preparation method of imidazole-containing cationic antistatic polyurethane
  • Preparation method of imidazole-containing cationic antistatic polyurethane
  • Preparation method of imidazole-containing cationic antistatic polyurethane

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0035] Example 1

[0036] Take 30 g of imidazole (441 mmol) in a flask, dissolve the imidazole with 882 mmol of methanol, add 37.96 g (441 mmol) of methyl acrylate after the imidazole is completely dissolved, stir and react at 0 ℃ for 72 h, and distill off the methanol under reduced pressure Solvent and excess methyl acrylate give imidazole methyl ester derivatives.

[0037] The obtained methylated imidazole and 54.68 g (441 mmol) of 2-bromoethanol were dissolved in 882 mmol of acetone, and reacted at a temperature of 60 ℃ for 1 h. The acetone solvent and excess 2-bromoethanol were removed by distillation under reduced pressure to obtain hydroxyl-terminated methyl Esterified imidazole ionic liquid. Take 11.67 g (50 mmol) hydroxyl-terminated methyl ester imidazole ionic liquid and 50 g (25 mmol) polyethylene glycol with a molecular weight of 1000 to react with stirring at 200 ℃ for 1 h to obtain a dihydroxy-terminated imidazole cationic antistatic polyether Dihydric alcohol.

[003...

Example Embodiment

[0039] Example 2

[0040] Take 47 g (691 mmol) of imidazole and place it in the flask. Dissolve the imidazole with 41 mol of methanol. After the imidazole is completely dissolved, add 442 g (3455 mmol) of butyl acrylate. Stir and react at 70 ℃ for 1 h. Distill under reduced pressure to remove the methanol. Solvent and excess butyl acrylate to obtain imidazole butyl esterified derivative.

[0041] The obtained butyl esterified imidazole was dissolved in 41 mol acetone with 428.48 g (3455 mmol) 2-bromoethanol, and reacted at a temperature of 0 ℃ for 72 h. The acetone solvent and excess 2-bromoethanol were removed by distillation under reduced pressure to obtain hydroxy-terminated butyl Esterified imidazole ionic liquid. Take 25 g (90 mmol) of hydroxy-terminated imidazole ionic liquid and 90 g (45 mmol) of hydroxy-terminated polycaprolactone with a molecular weight of 4000, stir and react at a temperature of 80 ℃ for 42 h, to obtain a dihydroxy-terminated imidazole cationic Antistat...

Example Embodiment

[0043] Example 3

[0044] Take 20 g of imidazole (294 mmol) in a flask, dissolve the imidazole with 1.2 mol of methanol, add 45.1 g (352 mmol) of butyl acrylate after the imidazole is completely dissolved, stir and react at 45 ℃ for 56 h, and distill under reduced pressure to remove the methanol Solvent and excess butyl acrylate to obtain imidazole butyl esterified derivative.

[0045] The obtained butyl esterified imidazole and 44.7 g (361 mmol) 2-bromoethanol were dissolved in 1.31 mol of acetone, and reacted at a temperature of 30°C for 40 h. The acetone solvent and excess 2-bromoethanol were removed by distillation under reduced pressure to obtain hydroxy-terminated butyl ester. Chemical imidazole ionic liquid. Take 35 g (127 mmol) of hydroxy-terminated imidazole ionic liquid and 63.5 g (63.5 mmol) of double-ended hydroxy-polycaprolactone with a molecular weight of 1000 to react with stirring at a temperature of 160 ℃ for 10 h to obtain a bis-hydroxy-terminated imidazole catio...

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Abstract

The invention discloses a preparation method of imidazole-containing cationic antistatic polyurethane. The preparation method provided by the invention is characterized by comprising the following steps: carrying out a reaction between imidazole and an acrylic acid ester compound at the mole ratio of 1:1-5 to obtain an esterified imidazole derivative; carrying out a reaction between the imidazole ester derivative and 2-bromoethanol at the mole ratio of 1:1-5 to obtain a hydroxyl-terminated imidazole ionic liquid, performing ester interchange between the hydroxyl-terminated imidazole ionic liquid and polyester or polyether glycol so as to obtain dihydroxy-terminiated imidazole cationic polyester or polyether glycol; and finally carrying out a reaction between 1-10 mol of dihydric alcohol with the molecular weight being 90-2000, 1-10 mol of dihydroxy-terminiated imidazole cationic antistatic long-chain dihydric alcohol and 1-20 mol of diisocyanate in a solvent in the presence of a catalyst so as to obtain the cationic antistatic polyurethane with the main chain containing imidazole. The imidazole-containing cationic polyurethane is prepared in the invention. The polyurethane has excellent antistatic performance. Electric property of the polyurethane will not be damaged by alkalinity or acidity, and electroconductibility of the polyurethane is not dependent on environment humidity. Thus, the polyurethane has a wider application field.

Description

technical field [0001] The invention relates to a preparation method of imidazole-containing cationic antistatic polyurethane, which belongs to the field of polymer material preparation. Background technique [0002] The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeating unit carbamate groups (-NHCOO-) in the main chain. Polyurethane is made from raw materials such as polyisocyanate and polyether polyol or polyester polyol and small molecule polyol. By changing the type and composition of raw materials, the morphology and properties of polyurethane can be greatly changed, so as to obtain end products from soft to hard. At present, the world's polyurethane industry has entered a period of "stable development" and "high-tech development". The volume resistivity of polyurethane is generally between 10 13 ~10 15 Between Ω·cm, it has good electrical insulation, but it is easy to generate static electricity accu...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/46C08G18/50C08G63/91C08G65/00
Inventor 雷景新胡泽宇向均张焱焱李昌兵
Owner SICHUAN UNIV
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