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Waterborne polyurethane dispersion with quadrupolar hydrogen bond and preparation method of waterborne polyurethane dispersion

A technology of water-based polyurethane and quadruple hydrogen bond, which is applied in the field of water-based polyurethane dispersion and its preparation, can solve the problems of environmental protection and non-sustainable development, and achieve the effect of high application value

Active Publication Date: 2019-12-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. Although most studies have successfully prepared supramolecular polymers containing hydrogen bonds, there is still a lot of room for improvement in the number of hydrogen bonds and the way hydrogen bonds are combined
[0009] 2. The preparation process of polymer materials containing hydrogen bonds often involves organic solvents, and even completes the reaction in the solvent phase throughout the process, which is contrary to the currently advocated green environmental protection and is not a suitable choice for sustainable development

Method used

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  • Waterborne polyurethane dispersion with quadrupolar hydrogen bond and preparation method of waterborne polyurethane dispersion
  • Waterborne polyurethane dispersion with quadrupolar hydrogen bond and preparation method of waterborne polyurethane dispersion
  • Waterborne polyurethane dispersion with quadrupolar hydrogen bond and preparation method of waterborne polyurethane dispersion

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Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1 (preparation of aminouracil monomer)

[0046] In the collector-type constant temperature heating magnetic stirrer, install a 250ml single-necked round bottom flask with a condenser tube and a magnetic stirrer, add 12.113g (0.1mol) guanidine carbonate, 19.22g (0.15mol) α-acetyl- γ-butyrolactone 15.18 (0.15mol) and 100ml of absolute ethanol, stirred and heated to reflux for 1 hour, and then the solid-liquid mixed state changed to a brownish-yellow clear and transparent state. After this state lasted for 20 minutes, the clear solution began to appear light yellow. Precipitate, continue to reflux for 5 hours Then stop heating. The supernatant was filtered to obtain a precipitate, that is, a crude product, which was washed with ethanol three times, then stirred with deionized water and adjusted to pH 6-7, filtered and vacuum-dried to obtain a white solid, the final product, aminouracil monomer. 1 H NMR (400MHz, DMSO-d 6 ): δ11.0(1H), 6.4(2H), 4.5(1H), 3.4(2H),...

Embodiment 2

[0047] Embodiment 2 (preparation of water-based polyurethane without quadruple hydrogen bond)

[0048] Add 73g of polybutylene adipate neopentyl glycol ester diol 2000 (PBNA2000) into a 500ml three-necked round-bottomed flask equipped with an electric stirrer, a condenser, and a thermometer, and vacuum dehydrate at 130°C and 0.01MPa for 2 hours. Cool down to 60°C and add 19.05g of isophorone diisocyanate (IPDI), 14g of N,N-dimethylacetamide, 0.02g of stannous octoate catalyst and 1.03g of 1,4-butanediol to adjust the soft and hard segments of the blank sample reagent, heated to 95°C, and reacted for 1.5h. Cool down to 60°C, add 2.412g of 2,2-dimethylolpropionic acid (DMPA), raise the temperature to 85°C, react for 2h, titrate the remaining amount of -NCO with di-n-butylamine until the -NCO content reaches 1.66wt%. Cool down to 60°C, add 150g of acetone to dissolve. The temperature of the system was controlled at 45° C., and 1.818 g of triethylamine, 2.085 g of isophoronediam...

Embodiment 3

[0049] Embodiment 3 (preparation of waterborne polyurethane containing quadruple hydrogen bond)

[0050] Add 73g polybutylene adipate neopentyl glycol ester diol 2000 (PBNA2000) and 0.676g aminouracil monomer (HMA) in the 500ml three-neck round bottom flask that electric stirrer, condenser, thermometer are housed, in Vacuum dehydration at 130°C and 0.01MPa for 2 hours. When the temperature was lowered to 60°C, 18.64g of isophorone diisocyanate (IPDI), 14g of N,N-dimethylacetamide and 0.02g of stannous octoate catalyst were added, the temperature was raised to 95°C, and the reaction was carried out for 1.5h. Cool down to 60°C, add 2.412g of 2,2-dimethylolpropionic acid (DMPA), heat up to 85°C, react for 2h, titrate the remaining amount of -NCO with di-n-butylamine until the -NCO content reaches 2.13wt% . Cool down to 60°C, add 150g of acetone to dissolve. The temperature of the system was controlled at 45° C., and 1.818 g of triethylamine, 2.843 g of isophoronediamine and 0....

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Abstract

The invention discloses a waterborne polyurethane dispersion with a quadrupolar hydrogen bond and a preparation method of the waterborne polyurethane dispersion. A repeating unit of a polyurethane molecular chain is a quadrupolar hydrogen bond element of a 2-ureido-4[1H]-pyrimidone type, the non covalent bond has a very high binding constant and reversibility, and probability of constructing a complex functional material is provided. As an amino-uracil monomer joins in diisocyanate, the quadrupolar hydrogen bond of the 2-ureido-4[1H]-pyrimidone type is introduced into a green and low-toxicityenvironmental-friendly macromolecule system, namely waterborne polyurethane, in a macromolecule dihydric alcohol prepolymerization mode, and thus a low VOC (volatile organic compound) polymer which isgood in self healing capability and high in tension strength can be prepared. The waterborne polyurethane dispersion has very good research prospects and application values in the field of polyurethane functional coatings.

Description

technical field [0001] The invention belongs to the field of preparation and application of polymer materials, and in particular relates to an aqueous polyurethane dispersion containing quadruple hydrogen bonds and a preparation method thereof. Background technique [0002] In recent years, the preparation of supramolecular polymers with self-assembly properties by introducing non-covalent bonds has become a hot topic. Supramolecular polymers refer to the special polymers in which repeated monomer units are combined by reversible and highly oriented forces, and exhibit polymer properties in solution or in bulk. Applying the theory and technology of supramolecular self-assembly phenomena, Polymer science applies the idea of ​​supramolecules to the preparation of new functional materials, and develops polymer materials with special functions and properties, such as self-healing materials, high-resilience materials, and shape-memory materials, which have great research prospect...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/12C08G18/34C08G18/38C08G18/42C08G18/32
CPCC08G18/12C08G18/348C08G18/3848C08G18/4238C08G18/6659C08G18/3234
Inventor 孙东成杨紫悦
Owner SOUTH CHINA UNIV OF TECH
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