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Self-repairing polythiourethane protective coating material preparation method and product thereof

A polythiourethane and protective coating technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as material failure, and achieve the effects of reinforced materials, simple synthesis methods, and high reaction yields

Active Publication Date: 2020-01-07
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method and product of a self-repairing polythiourethane protective coating material, thereby solving some problems in the prior art, such as the repair of intelligent materials and coating fillers, and realizing the problem of industrialized production; The surface coating materials of traditional marine ships and marine equipment are disturbed by collision, light and other factors during the service process to produce cracks and lead to material failure. It plays a role in stopping the crack propagation and can also be used as a coating filler for offshore wind power applications. Generating blades to achieve the purpose of repairing protection and strengthening materials

Method used

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  • Self-repairing polythiourethane protective coating material preparation method and product thereof
  • Self-repairing polythiourethane protective coating material preparation method and product thereof
  • Self-repairing polythiourethane protective coating material preparation method and product thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A self-healing polythiourethane material is prepared from a small molecular compound containing a disulfide bond and an isocyanate-terminated polythiourethane, and the specific steps are as follows;

[0022] (1) Calculate and weigh raw materials.

[0023] (2) Preparation of small molecule compounds containing disulfide bonds: Weigh 0.9 mL of β-mercaptoethanol into a 150 mL beaker, stir well, then quickly add 1.1 mL of triethylamine (TEA) dropwise, and keep the reaction vessel open to air contact, slowly and dropwise add 1.3 mL of H 2 o 2 (30%), white turbidity will be produced during the dropping process, and a large amount of heat will be released. When the temperature of the beaker is cooled to room temperature, continue to add H 2 o 2 (30%), after the dropwise addition, continue to stir until the solution is colorless and transparent, remove the reaction solvent and dry in vacuum at 60 °C overnight to constant weight.

[0024] (3) Preparation of isocyanate-termin...

Embodiment 2

[0027] A preparation of a self-healing polythiourethane material, which is prepared from a small molecular compound containing a disulfide bond and an isocyanate group-terminated polythiourethane, and the specific steps are as follows;

[0028] (1) Calculate and weigh raw materials.

[0029] (2) Preparation of small molecule compounds containing disulfide bonds: Weigh 2.7 mL of β-mercaptoethanol solution in a 150 mL beaker, stir well, then quickly add 3.3 mL of triethylamine (TEA) solution dropwise, and keep the reaction vessel open In contact with air, slowly and dropwise add 3.9 mL of H 2 o 2 (30%) solution, white turbidity will be generated during the dropping process, and a large amount of heat will be released. When the temperature of the beaker is cooled to room temperature, continue to add H 2 o 2 (30%), after the dropwise addition, continue to stir until the solution is colorless and transparent, remove the reaction solvent and dry in vacuum at 60 °C overnight to co...

Embodiment 3

[0033] A preparation of a self-healing polythiourethane material, which is prepared from a small molecular compound containing a disulfide bond and an isocyanate group-terminated polythiourethane, and the specific steps are as follows;

[0034](1) Calculate and weigh raw materials.

[0035] (2) Preparation of small molecular compounds containing disulfide bonds: Weigh 2.7 mL of β-mercaptoethanol into a 150 mL beaker, stir well, then quickly add 3.3 mL of triethylamine (TEA) dropwise, and keep the reaction vessel open to the air. contact, slowly and dropwise add 5.2 mL of H 2 o 2 (30%), white turbidity will be produced during the dropping process, and a large amount of heat will be released. When the temperature of the beaker is cooled to room temperature, continue to add H 2 o 2 (30%), after the dropwise addition, continue to stir until the solution is colorless and transparent, remove the reaction solvent and dry in vacuum at 60 °C overnight to constant weight.

[0036] (...

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Abstract

The invention discloses a self-repairing polythiourethane protective coating materialpreparation method, which comprises: preparing a small molecular chain segment (a small molecular chain segment containing a disulfide bond) with a dynamic reversible covalent bond by using triethylamine (TEA) as a catalyst, using H2O2 (30%) as an oxidizing agent and selecting one or a plurality of reagents selected from thioglycerol, beta-mercaptoethanol and trimethylolpropane tri (TMMP); preparing an isocyanate-terminated polythiourethane prepolymer from 4-4'-diphenylmethane diisocyanate (MDI) and trimethylolpropane tri (TMMP); and carrying out a polycondensation reaction on the product to prepare the self-repairable polythiourethane material. According to the invention, the synthesis method is simple, high in reaction yield, and simple and convenient in post-treatment mode, and the prepared product is good in self-repairing performance, and can be used as the filler of a coating in offshore wind turbine blades so as to repairandreinforce materials.

Description

technical field [0001] The invention relates to the field of self-healing polymer materials, in particular to the preparation of disulfide bond-based intrinsic self-healing polymer materials. Background technique [0002] Coating is a corrosion control method commonly used in marine engineering equipment at present. However, traditional polymer materials are disturbed by factors such as collision and light during service or processing, and cracks will occur. If it is not repaired in time, corrosion will spread from microcracks, but it is difficult or impossible to detect externally, and the expansion of these microcracks will reduce the mechanical properties and stability of the material, and eventually lead to material failure. (Zhang Xiaoa, Jiang Shengling, etc. Supramolecular polymer composite materials and their self-healing behavior [J]. Polymer Bulletin, 2016 (11): 1-8.) After investigating the main anti-corrosion coating systems in my country, it can be seen that Dome...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/38C08G18/10C09D175/04
CPCC08G18/10C08G18/3876C08G18/7671C09D175/04
Inventor 欧宝立刘刚赵欣欣彭彩茹
Owner HUNAN UNIV OF SCI & TECH
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