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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 implementation process, and the production cost is relatively high

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

Embodiment 1

[0037] (1) Preparation of fluorine-containing block acrylate copolymer: preparation of block copolymer with molecular weight of 10,000 and block mass ratio of 9:1 terminal hydroxyl butyl methacrylate and dodecafluoroheptyl methacrylate

[0038] In a 100mL four-necked flask, add 0.498g (0.002mol) initiator α-bromoisobutyric acid (4-hydroxybutylene glycol ester), 18g (0.127mol) of butyl methacrylate monomer, 0.183g (0.00127 mol) catalyst CuBr, 0.439g (0.00254mol) ligand PMDETA, 7.2g solvent toluene, mix well. The system was evacuated and filled with nitrogen, and stirred and reacted in an oil bath at 60°C. After 8 hours, add 2 g (0.005 mol) dodecafluoroheptyl methacrylate, 0.0072 g (0.00005 mol) CuBr, 0.0173 g (0.0001 mol) ligand PMDETA to the flask. The stirring reaction was continued under the bath for 12 hours. After the reaction was completed, the catalyst and solvent were removed to obtain a light yellow solid product with a product quality of 14.96 g and a yield of 74.8%....

Embodiment 2

[0043] (1) Preparation of fluorine-containing block acrylate copolymer: preparation of block copolymer with molecular weight of 10,000 and block mass ratio of 7:3 terminal hydroxyl butyl methacrylate and hexafluorobutyl methacrylate

[0044] In a 100mL four-necked flask, add 0.37g (0.002mol) initiator 1-bromoethylbenzene, 14g (0.0986mol) of butyl methacrylate monomer, 0.1415g (0.000986mol) catalyst CuBr, 0.2291g (0.001972mol) ) ligand tetramethylethylenediamine, 6.02g solvent anisole, mix well. The system was evacuated and filled with nitrogen, and stirred and reacted in an oil bath at 30°C. After 24 hours, add 6 g (0.024 mol) hexafluorobutyl methacrylate, 0.0238 g (0.00024 mol) CuCl, 0.05578 g (0.00048 mol) ligand tetramethylethylenediamine to the flask, and pump again to fill with nitrogen. Stirring and reaction were continued for 24 hours in an oil bath at 50°C. After the reaction was completed, the catalyst and solvent were removed to obtain a light yellow solid product w...

Embodiment 3

[0048] (1) Preparation of fluorine-containing block acrylate copolymer: preparation of block copolymer with a molecular weight of 5000 and a block mass ratio of 9:1 terminal hydroxyl butyl methacrylate and hexafluorobutyl methacrylate

[0049] Add 0.724g (0.004mol) initiator 0-ethyl bromopropionate in 100mL four-necked flask, the butyl methacrylate monomer of 18g (0.127mol), 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 stirred and reacted in an oil bath at 50°C. After 18 hours, 2 g (0.008 mol) of hexafluorobutyl methacrylate, 0.0115 g (0.00008 mol) of CuBr, 0.03686 g (0.00016 mol) of the ligand tris-(N,N-dimethylaminoethyl) were added to the flask Amine (Me6 TREN), after vacuuming again and filling with nitrogen, continue to stir and react in an oil bath at 120°C for 8 hours. After the reaction is completed, after removing th...

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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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