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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 accumulated on the surface of the product may bring difficulties to the molding operation and affect the quality of the product; it may also seriously affect the appearance of the product and the appearance of the product in an ultra-clean environment (such as operating room, computer room, precision instrument room, etc.) application

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
Effect test

Embodiment 1

[0036] Take 30 g of imidazole (441 mmol) in a flask, dissolve imidazole with 882 mmol of methanol, add 37.96 g (441 mmol) of methyl acrylate after the imidazole is completely dissolved, stir the reaction at 0 °C for 72 h, and distill off the methanol under reduced pressure solvent and excess methyl acrylate to obtain imidazole methylated derivatives.

[0037] The obtained methylated imidazole and 54.68 g (441 mmol) of 2-bromoethanol were dissolved in 882 mmol of acetone, reacted at a temperature of 60 °C for 1 h, and the acetone solvent and excess 2-bromoethanol were distilled off under reduced pressure to obtain the terminal hydroxymethyl Esterified imidazolium ionic liquid. Take 11.67 g (50 mmol) of hydroxy-terminated methylated imidazolium ionic liquid and 50 g (25 mmol) of polyethylene glycol with a molecular weight of 1000 at a temperature of 200 ℃ for 1 h to obtain a dihydroxy-terminated imidazolium cationic antistatic polyether glycol.

[0038]Take 1 mol of the obtain...

Embodiment 2

[0040] Take 47 g (691 mmol) of imidazole in a flask, dissolve the imidazole with 41 mol of methanol, add 442 g (3455 mmol) of butyl acrylate after the imidazole is completely dissolved, stir the reaction at 70 °C for 1 h, and distill off the methanol under reduced pressure Solvent and excess butyl acrylate to obtain imidazobutin esterified derivatives.

[0041] Dissolve the obtained butylated imidazole and 428.48 g (3455 mmol) 2-bromoethanol in 41 mol acetone, react at a temperature of 0 °C for 72 h, and distill off the acetone solvent and excess 2-bromoethanol under reduced pressure to obtain terminal hydroxybutyrate Esterified imidazolium ionic liquid. Take 25 g (90 mmol) of hydroxy-terminated butyl esterified imidazolium ionic liquid and 90 g (45 mmol) of double-terminated hydroxyl polycaprolactone with a molecular weight of 4000, and stir and react at a temperature of 80 °C for 42 h to obtain a dihydroxy-terminated imidazolium cationic Antistatic polyester diol.

[0042]...

Embodiment 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 the reaction at 45 °C for 56 h, and distill off the methanol under reduced pressure Solvent and excess butyl acrylate to obtain imidazobutin esterified derivatives.

[0045] Dissolve the obtained butylated imidazole and 44.7 g (361 mmol) 2-bromoethanol in 1.31 mol acetone, react at a temperature of 30°C for 40 h, and distill off the acetone solvent and excess 2-bromoethanol to obtain hydroxy-terminated butyl ester imidazolium ionic liquid. 35 g (127 mmol) of hydroxy-terminated butyl esterified imidazolium ionic liquid and 63.5 g (63.5 mmol) of double-terminated hydroxyl polycaprolactone with a molecular weight of 1000 were stirred and reacted at 160 °C for 10 h to obtain a dihydroxy-terminated imidazolium cationic antibiotic Electrostatic polyester diol.

[0046] Get 3 mol of gained pol...

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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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