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Waterborne polyurethane resin containing pyrimidinone structure as well as preparation method and application of waterborne polyurethane resin

A water-based polyurethane technology containing pyrimidinone, which is applied in the field of polymer synthesis technology and intelligent polymer materials to achieve good self-repair performance, improved service life and good mechanical properties

Active Publication Date: 2020-05-19
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on self-healing polyurethane materials combined with host-guest interaction and hydrogen bonding is mainly concentrated in the field of traditional solvent-based polyurethanes, Angewandte Chemie (International ed.in English), 2018, 24(33) 5261-5268; so far, Self-healing by host-guest interaction by introducing UPy groups into the main chain and / or end groups of waterborne polyurethane has not been reported yet

Method used

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  • Waterborne polyurethane resin containing pyrimidinone structure as well as preparation method and application of waterborne polyurethane resin
  • Waterborne polyurethane resin containing pyrimidinone structure as well as preparation method and application of waterborne polyurethane resin
  • Waterborne polyurethane resin containing pyrimidinone structure as well as preparation method and application of waterborne polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of preparation method of the waterborne polyurethane resin containing pyrimidinone structure, the steps are as follows:

[0040] (1) Polycarbonate diol 2000 and dimethylol propionic acid were distilled under reduced pressure for 2.0 h at 110° C. and a vacuum of 0.080 MPa to remove moisture;

[0041] Add 5.10g of polycarbonate diol 2000 that has been dried and dehydrated, 0.55g of dimethylol propionic acid that has been dried and dehydrated, 2.90g of dicyclohexylmethane diisocyanate, 0.008g of dibutyltin dilaurate into a four-neck flask After stirring, the temperature was raised to 85°C for 3.0 hours to obtain the first prepolymer;

[0042] (2) Cool the obtained first prepolymer to 50°C, add 0.2g UPy, heat up to 85°C and continue the reaction for 2.0h; then cool down to 50°C, add 0.65g of methylated β-cyclodextrin, and heat up to 65°C Continue to react at ℃ for 4h to obtain the second prepolymer;

[0043] (3) Cool the obtained second prepolymer to 35° C., add 2....

Embodiment 2

[0047] A kind of preparation method of the waterborne polyurethane resin containing pyrimidinone structure, the steps are as follows:

[0048] (1) Polycaprolactone diol 2000 and dimethylolpropionic acid were distilled under reduced pressure for 2.0 h at 120°C and a vacuum of 0.070 MPa to remove moisture;

[0049] Add 5.10g of polycaprolactone diol 2000 that has been dried and dehydrated, 0.55g of dimethylol propionic acid that has been dried and dehydrated, 2.46g of dicyclohexylmethane diisocyanate, 0.008g of dilauric acid diisocyanate into a four-neck flask After butyltin was stirred, the temperature was raised to 85°C for 3.0 hours to obtain the first prepolymer;

[0050] (2) Cool the obtained first prepolymer to 50°C, add 0.2g UPy, heat up to 85°C and continue the reaction for 2.0h; then cool down to 50°C, add 0.65g of methylated β-cyclodextrin, and heat up to 65°C Continue to react at ℃ for 4h to obtain the second prepolymer;

[0051] (3) Cool the obtained second prepoly...

Embodiment 3

[0054] A kind of preparation method of the waterborne polyurethane resin containing pyrimidinone structure, the steps are as follows:

[0055] (1) Distill polytetrahydrofuran ether glycol 2000 and dimethylol propionic acid under reduced pressure for 2.0 hours at 120°C and a vacuum of 0.090 MPa to remove moisture;

[0056] Add 2.55g of polytetrahydrofuran ether glycol 2000, 0.55g of dried and dehydrated dimethylol propionic acid, 1.86g of hexamethylene diisocyanate, 0.008g of dibutyltin dilaurate to the four-necked flask After stirring, the temperature was raised to 85°C for 3.0 hours to obtain the first prepolymer;

[0057] (2) Cool the obtained first prepolymer to 50°C, add 0.2g UPy, heat up to 85°C and continue the reaction for 2.0h; then cool down to 50°C, add 0.65g of methylated β-cyclodextrin, and heat up to 65°C Continue to react at ℃ for 4h to obtain the second prepolymer;

[0058] (3) Cool down to 35°C, add 2.5g of acetone to adjust the viscosity of the system, and a...

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Abstract

The invention discloses a waterborne polyurethane resin containing a pyrimidinone structure as well as a preparation method and application of the waterborne polyurethane resin. The method comprises the following steps: heating macromolecular diol to remove moisture, then reacting with a diisocyanate and a hydrophilic chain extender under the conditions of stirring and catalysis to obtain a firstprepolymer, and reacting with 2-amino-4-hydroxy-6-methylpyrimidinone diol and cross-linking agent methylated beta-cyclodextrin to obtain a second prepolymer; adjusting the viscosity, reacting with a neutralizer, adding water and a diamine chain extender, and dispersing and emulsifying under high-speed stirring to obtain a waterborne supramolecular polyurethane emulsion. The waterborne polyurethaneresin containing the pyrimidinone structure provided by the invention shows good mechanical property and self-repairing property, the emulsion transparent zone is good in blue light stability, greenand environment-friendly, a self-repairing function can be realized under a heating condition, no catalyst isneeded, the operation is simple, and the self-repairing efficiency is high; thewaterborne polyurethane resin is suitable for preparing coatings, adhesives, intelligent textiles and plasticizers.

Description

technical field [0001] The invention belongs to the field of polymer synthesis technology and intelligent polymer materials, and specifically relates to a water-based polyurethane resin containing a pyrimidinone structure and a preparation method and application thereof. Background technique [0002] As one of the important factors affecting the life of polymers, the damage of polymer materials has received more and more attention. Use self-healing materials to solve the inevitable damage problem of polymer materials in actual use, so as to prolong the service life of materials. According to whether a repair agent is added to the polymer matrix, self-healing polymer materials are usually divided into two categories: extrinsic type and intrinsic type. The former mainly includes active healing agents composed of microcapsules and liquid core fibers to enable the material to realize the self-healing function. White and his colleagues report for the first time an extrinsic sel...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/64C08G18/44C08G18/42C08G18/48C08G18/12C08G18/34C08G18/32
CPCC08G18/12C08G18/348C08G18/4277C08G18/44C08G18/4854C08G18/6484C08G18/6659C08G18/6692C08G18/3848C08G18/64C08G18/3228
Inventor 史珺肖璐琪黄晓梅姚鸣峰张恩丁吴昆
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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