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Fluorine-containing aqueous polyurethane and preparation method and application thereof

A water-based polyurethane and polyurethane technology, applied in polyurea/polyurethane coatings, chemical instruments and methods, textiles and papermaking, etc., can solve problems such as health pollution, increased danger, and flammability, so as to prolong the service life and solve the waste of resources , The effect of saving construction costs

Inactive Publication Date: 2007-09-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional polyurethanes are mostly solvent-based polyurethanes, which volatilize a large amount of organic solvents during the construction process, causing great pollution and damage to the environment and the health of construction workers, and because organic solvents are easy to burn, it increases the cost of transportation, hazards in storage and use

Method used

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  • Fluorine-containing aqueous polyurethane and preparation method and application thereof
  • Fluorine-containing aqueous polyurethane and preparation method and application thereof
  • Fluorine-containing aqueous polyurethane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add tribromoneopentyl alcohol (20.0 g, 61.5 mmol), NaOH (20 g), phase transfer catalyst TBAB (0.79 g, 2.46 mmol) and CH in a 250 mL three-necked flask equipped with a reflux condenser and a thermometer. 2 Cl 2 (100 mL), stirred evenly by magnetic force, then raised the temperature to 35°C for 12 hours, stopped the reaction, and cooled to room temperature. The layers were allowed to stand, the organic matter in the lower layer was removed, the aqueous layer was extracted with dichloromethane, the organic layers were combined, and dried over anhydrous magnesium sulfate. The organic solvent was removed under vacuum. Distilled under reduced pressure to obtain bromobutylene oxide as a colorless liquid (10.5 g, yield 70%).

[0043] The relevant data are as follows: 1 H NMR (300MHz, CDCl 3 )δ: 3.9(s, 4H), 4.4(s, 4H).

[0044] Under the protection of nitrogen, the compound bromobutylene oxide (10.0 g, 40.9 mmol) was added into a 100 mL three-necked flask equipped with a re...

Embodiment 2

[0052] Under nitrogen protection, PFOX, IPDI ([IPDI] / [PFOX]=3.1 / 1, mol) and DBTDL ([DBTDL] / [monomers]=0.001 / 1, mol) were added to dry 500mL in a three-neck flask. Heating to 50°C for 3 hours, then adding the prepolymer to triethylenetetramine and epichlorohydrin ([triethylenetetramine] / [epichlorohydrin] / [prepolymer]=1:1.2 : 1, mol) in the acetone solution, heated to 50 ℃ after adding and continued to react for 3 hours. Finally, add acetic acid aqueous solution to control the degree of neutralization at 70%. After cooling to room temperature, residual acetone was removed in vacuo. The obtained polymer is a translucent liquid with blue fluorescence, and the molecular weight distribution is between 5,000 and 10,000.

[0053] The cationic water-based polyurethane obtained above is formulated into a solution, a crosslinking agent is added, and the padding-drying-baking process is used for finishing. The contact angle of the finished fabric to water reaches 142°, and the finished...

Embodiment 3

[0055] Under nitrogen protection, add PFOX, MDI (MDII] / [PFOX]=3.1 / 1, mol) and DBTDL ([DBTDL] / [monomers]=0.001 / 1, mol) to a dry 500mL three-port in the flask. Heating to 60°C for 4 hours, then adding the prepolymer to tetraethylenepentamine and epichlorohydrin ([triethylenetetramine] / [epichlorohydrin] / [prepolymer]=1:1.2 : 1, mol) in the acetone solution, heated to 70 ℃ after adding and continued to react for 5 hours. Finally, add acetic acid aqueous solution, and the degree of neutralization is controlled at 60%. After cooling to room temperature, residual acetone was removed in vacuo. The obtained polymer is a translucent liquid with blue fluorescence, and the molecular weight distribution is between 10,000 and 50,000.

[0056] The cationic water-based polyurethane obtained above is formulated into a solution, a crosslinking agent is added, and the padding-drying-baking process is used for finishing. The contact angle of the finished fabric to water reaches 145°, and the fi...

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Abstract

The invention discloses a making method and application of aqueous fluorine polyurethane, which contains cationic and anionic aqueous fluorine polyurethane with the making procedure comprises the following steps: (1) synthesizing bromoepoxybutane; (2) making fluoepoxybutane; (3) preparing fluorine polyether; (4) synthesizing aqueous polyurethane. The invention can be high-property green environment-protective water repellency, waterproof and stainproof paint, which possesses wide market prospect.

Description

technical field [0001] The invention belongs to the field of surface coatings, in particular to a fluorine-containing water-based polyurethane and its preparation method and application. Background technique [0002] At present, with the development of coating technology at home and abroad and the improvement of people's living standards, people pay more and more attention to multi-functional coating products with high technical content. Coating agents that can not only endow the substrate with excellent water repellency, waterproof, antifouling, weather resistance, and light fastness, but also are environmentally friendly, have increasingly attracted people's attention. [0003] The wettability of the material surface is a very important property, which is usually controlled by the chemical composition and geometry of the surface, and has a wide range of applications in industry. This is because the hydrophobic surface reduces the contact with water, and the chemical bonds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08G18/76C09D175/04C09D5/16D06M15/576D21H19/00C09K3/18
CPCD06M15/576
Inventor 卿凤翎黄继庆
Owner DONGHUA UNIV
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