Fluorine-cation-containing WPU (waterborne polyurethane) and preparation method thereof

A water-based polyurethane and cationic technology, applied in the field of chemical materials, can solve the problems of high fluorine content and high production cost, and achieve the effects of stable performance, improved solvent resistance and mechanical properties, and controllable raw materials

Active Publication Date: 2013-04-17
无锡智慧兴宜信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods require a relatively large amount of fluorine in the

Method used

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  • Fluorine-cation-containing WPU (waterborne polyurethane) and preparation method thereof
  • Fluorine-cation-containing WPU (waterborne polyurethane) and preparation method thereof
  • Fluorine-cation-containing WPU (waterborne polyurethane) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1:

[0037] (1) Preparation of fluorine-containing block acrylate copolymer: the molecular weight is 10,000, and the block mass ratio is 9:1. Preparation of the block copolymer of hydroxy-terminated butyl methacrylate and dodecafluoroheptyl methacrylate

[0038] Add 0.498g (0.002mol) initiator α-bromoisobutyric acid (4-hydroxybutanediol ester), 18g (0.127mol) butyl methacrylate monomer, 0.183g (0.00127) in a 100mL four-necked flask mol) Catalyst CuBr, 0.439g (0.00254mol) ligand PMDETA, 7.2g solvent toluene, mix well. The system was evacuated and filled with nitrogen, and the reaction was stirred in an oil bath at 60°C. After 8 hours, add 2g (0.005mol) dodecafluoroheptyl methacrylate, 0.0072g (0.00005mol) CuBr, and 0.0173g (0.0001mol) ligand PMDETA into the flask. After pumping and filling with nitrogen again, it is heated at 80℃. Stirring and reacting under the bath for 12 hours, the reaction is over, after removing the catalyst and solvent, a light yellow solid pr...

Example Embodiment

[0042] Example 2:

[0043] (1) Preparation of fluorine-containing block acrylate copolymer: the molecular weight is 10,000, and the block mass ratio is 7:3. Preparation of hydroxy-terminated butyl methacrylate and hexafluorobutyl methacrylate block copolymer

[0044] Add 0.37g (0.002mol) initiator 1-bromoethylbenzene, 14g (0.0986mol) butyl methacrylate monomer, 0.1415g (0.000986mol) catalyst CuBr, 0.2291g (0.001972mol) in a 100mL four-neck flask ) Ligand tetramethylethylenediamine, 6.02g solvent anisole, mix well. The system was evacuated and filled with nitrogen, and the reaction was stirred in an oil bath at 30°C. After 24 hours, add 6g (0.024mol) hexafluorobutyl methacrylate, 0.0238g (0.00024mol) CuCl, and 0.05578g (0.00048mol) ligand tetramethylethylenediamine into the flask. After pumping and filling with nitrogen again, Stirring and reacting in an oil bath at 50°C for 24 hours, the reaction is over, after removing the catalyst and solvent, a light yellow solid product can b...

Example Embodiment

[0047] Example 3:

[0048] (1) Preparation of fluorinated block acrylate copolymer: molecular weight 5000, block mass ratio of 9:1 preparation of hydroxy-terminated butyl methacrylate and hexafluorobutyl methacrylate block copolymer

[0049] In a 100mL four-neck flask, add 0.724g (0.004mol) of the initiator 0-ethyl bromopropionate, 18g (0.127mol) of butyl methacrylate monomer, 0.183g (0.00127mol) catalyst CuBr, 0.5852g ( 0.00254mol) ligand tris-(N,N-dimethylaminoethyl)amine (Me6 TREN), 7.2g solvent toluene, mix well. The system was evacuated and filled with nitrogen, and the reaction was stirred in an oil bath at 50°C. After 18 hours was added 2g (0.008mol) hexafluorobutyl methacrylate, 0.0115g (0.00008mol) CuBr, 0.03686g (0.00016mol) ligand tri-(N,N-dimethylaminoethyl) Amine (Me6 TREN), after pumping and filling with nitrogen again, continue to stir and react for 8 hours at 120°C in an oil bath. After the reaction is over, after removing the catalyst and solvent, a light yellow ...

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Abstract

According to the invention, hydroxyl-containing and fluorine-containing acrylic ester block copolymers synthesized with an ATRP (Atom Transfer Radical Polymerization) method and provided with a molecular weight ranging from 1,000 to 20,000 serve as a raw material, and react with isocyanates, polyols and hydrophilic chain extenders in the presence of a certain amount of solvent or no solvent to prepare fluorine-cation-containing WPU with good surface properties. Chemical stabilities, mechanical properties, oil and water resistance and other performance of the fluorine-cation-containing WPU can be improved; and simultaneously, the usage amount of fluorine is reduced greatly and the cost is decreased.

Description

technical field [0001] The invention belongs to the field of chemical materials and relates to the preparation of fluorine-containing cationic water-based polyurethane by utilizing a hydroxyl-containing fluorine-containing acrylate block copolymer synthesized by atom transfer radical polymerization (ATRP). technical background [0002] Water-based polyurethane uses water as the medium, which has the advantages of low toxicity, non-flammability, low odor, no pollution to the environment, energy saving, convenient operation and processing, etc. At the same time, it also has some properties of solvent-based polyurethane. The polyurethane coating has high hardness, strong adhesion, and durability. Combining the advantages of good abrasiveness and flexibility with the low pollution of water-based coatings, and effectively controlling the composition and structure of coatings, it is widely used in coatings for fabrics and leather, adhesives for wood and PVC, water-based paints, and...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/63C08G18/12C08F293/00
Inventor 李坚张旸任强孙建平
Owner 无锡智慧兴宜信息技术有限公司
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