A low-viscosity high-permeability polyaspartate

An aspartic ester, high penetration technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of reducing, reducing the molecular chain strength, reducing the permeability of polyaspartic acid ester, and achieving low viscosity , increase cement strength, high flexibility effect

Active Publication Date: 2022-04-01
浙江艾特普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of reducing the permeability of polyaspartate or reducing the strength of its molecular chain when modifying polyaspartate with silicone in the prior art, and to provide a low-viscosity High-permeability polyaspartic acid ester, the modification of polyaspartic acid ester by silane can effectively reduce the viscosity of polyaspartic acid ester without affecting the strength of its molecular chain, which is beneficial to polyaspartic acid Application of Ester in Coating Materials

Method used

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  • A low-viscosity high-permeability polyaspartate
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  • A low-viscosity high-permeability polyaspartate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A low-viscosity high-permeability polyaspartic acid ester, the structural formula is:

[0043]

[0044] Among them, R and R 1 is ethyl; R 2 is n-propyl, R 3 For ethyl.

[0045] Its preparation method is:

[0046] (1) Add maleic anhydride and ethylene glycol with a molar ratio of 2.0:1 into a flask with a water separator, and add 0.15% of the total mass of reactants as a polymerization inhibitor p-hydroxyanisole (MEHQ), at 150°C React for 5 hours under the protection of nitrogen, until the acid value does not change for 1 hour;

[0047] (2) adding ethanol that is 1:1.0 to the esterification product of step (1) with the maleic anhydride molar ratio, and finishing the reaction after reacting to the acid value<5mg KOH / g;

[0048] (3) Add gamma-aminopropyltriethoxysilane with a molar ratio of 0.98:1 to maleic anhydride to the product obtained in step (2), and catalyst sodium methylate with 0.03% of the total mass of reactants, 60°C under nitrogen React for 12 hours ...

Embodiment 2

[0050] A low-viscosity high-permeability polyaspartic acid ester, the structural formula is:

[0051]

[0052] Among them, R is a diethylene glycol group, R 1 is ethyl, R 2 is n-propyl, R 3 For ethyl.

[0053] Its preparation method is:

[0054] (1) Add maleic anhydride and diethylene glycol with a molar ratio of 1.8:1 into a flask with a water separator, and add a polymerization inhibitor MEHQ of 0.1% of the total mass of reactants, and react under nitrogen protection at 145°C 6h, until the acid value 1h no change;

[0055] (2) adding ethanol that is 1:0.9 to the esterification product of step (1) with the maleic anhydride molar ratio, and reacting to the acid value<5mg KOH / g to finish the reaction;

[0056] (3) Add gamma-aminopropyltriethoxysilane with a molar ratio of maleic anhydride of 0.95:1 to the product obtained in step (2), and catalyst sodium methoxide with 0.02% of the total mass of reactants, 55°C under nitrogen React for 16 hours under protection to obtain...

Embodiment 3

[0058] A low-viscosity high-permeability polyaspartic acid ester, the structural formula is:

[0059]

[0060] Among them, R 2 for -CH 2 -O-CH 2 -CH 2 -CH 2 -, R 3 is methyl, R 4 For ethyl.

[0061] Its preparation method is:

[0062] A) Add maleic anhydride and γ-glycidyl etheroxypropyltrimethoxysilane with a molar ratio of 1:2.2 into the flask, and add 0.15% of the total mass of the reactants to the polymerization inhibitor MEHQ and the total mass of the reactants to 0.08 % of the catalyst triphenylphosphine, under the protection of nitrogen at 100 ℃, the acid value is less than 5mg KOH / g, and the maleate is obtained;

[0063] B) Add ethylenediamine to the obtained maleic acid ester, the molar ratio of maleic acid ester to ethylenediamine is 2.2:1, and add 0.03% catalyst sodium methoxide of the total mass of reactants, under nitrogen protection at 60°C After 10 hours of reaction, the polyaspartic acid ester was obtained.

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PUM

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Abstract

The invention discloses a low-viscosity and high-permeability polyaspartic acid ester. The esterification reaction between maleic anhydride and dihydric alcohol is carried out, and then the esterification product is reacted with aminosilane to obtain polyaspartic acid modified by organic silicon. Amino acid ester; Or use maleic anhydride and epoxy silane to take place ring-opening reaction, then react with dibasic amine to obtain organosilicon-modified polyaspartic acid ester, the present invention uses organosiloxane side chain to poly The modification of aspartic acid ester can effectively reduce the viscosity of polyaspartic acid ester without affecting the strength of its molecular chain, which is beneficial to the application of polyaspartic acid ester in coating materials.

Description

technical field [0001] The invention relates to the technical field of polyaspartic acid ester preparation, in particular to a low-viscosity high-permeation polyaspartic acid ester. Background technique [0002] Polyaspartic ester polyurea resin (PAE resin) is an aliphatic, slow-response, high-performance coating material, known as the third-generation polyurea. Polyaspartic acid ester is actually a kind of aliphatic secondary amine. The amino group in its molecular structure is surrounded by the space coronal steric hindrance environment. By artificially increasing the steric hindrance density of the space coronal structure in its molecule, it can be synthesized A range of polyurea materials with gel times ranging from minutes to hours. [0003] Existing PAE resins generally have the problems of high material glass transition temperature, fast curing speed, high viscosity, poor wetting to cement, glass and other materials, resulting in low adhesion of the coating. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/64C09D175/02
CPCC08G18/6415C09D175/02
Inventor 卢鹏飞徐轶姜山赵军子朱银邦
Owner 浙江艾特普科技有限公司
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