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A kind of corrosion-resistant spray polyurea and preparation method thereof

A corrosion-resistant, polyurea technology, applied in the field of spraying polyurea and its preparation, can solve the problems of affecting the anti-corrosion performance of polyurea coating, the lack of corrosion resistance of hydrofluoric acid, and the failure of polyurea to meet the requirements, so as to improve the acid resistance. Alkaline corrosion performance, improved corrosion resistance, outstanding effect of strong acid and alkali resistance

Active Publication Date: 2021-04-13
李鸿翔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application of anti-corrosion and anti-acid and alkali fields, ordinary polyurea has not yet met the requirements
In the prior art, by modifying isocyanate with organic silicon and then using it to synthesize sprayable polyurea, the anticorrosion performance of the obtained polyurea is indeed improved to a certain extent, but it has almost no corrosion resistance to hydrofluoric acid. Silicon is quickly dissolved by hydrofluoric acid, which destroys the coating and affects the anti-corrosion performance of the polyurea coating

Method used

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  • A kind of corrosion-resistant spray polyurea and preparation method thereof
  • A kind of corrosion-resistant spray polyurea and preparation method thereof
  • A kind of corrosion-resistant spray polyurea and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] Corrosion-resistant spray polyurea, including A-component and B-component,

[0034] The A component includes the following raw materials in parts by weight: 20 parts of isophorone diisocyanate, 15 parts of toluene diisocyanate, 20 parts of hydroxyl-terminated fluorine-containing silicone oil, 20 parts of polyester polyol, 0.5 parts of catalyst and 20 parts of solvent, The solvent is a compound solvent of xylene and butyl acetate, and the volume ratio of the xylene to butyl acetate is 1.2:1; the molecular weight of the polyester polyol is 1000-1500;

[0035] The catalyst is prepared from the following raw materials in weight percentage: 20% of dehydrated 1,4-butanediol, 20% of triethylenediamine, 20% of 2,2-bismorpholino diethyl ether and 40% of phenol solution , the solvent of the phenol solution is toluene, and the concentration of the phenol solution is 55wt%;

[0036] The B component includes the following raw materials in parts by weight: 12 parts of diethyltoluene...

Embodiment 2

[0044] Corrosion-resistant spray polyurea, including A-component and B-component,

[0045] The A component includes the following raw materials in parts by weight: 30 parts of 4,4'-dicyclohexylmethane diisocyanate, 20 parts of toluene diisocyanate, 30 parts of hydroxyl-terminated fluorine-containing silicone oil, 30 parts of polyester polyol, and 1 part of catalyst And 50 parts of solvent, described solvent is xylene and butyl acetate compound solvent, and the volume ratio of described xylene and butyl acetate is 0.8:1; The molecular weight of described polyester polyol is 1000-1500;

[0046] The catalyst is prepared from the following raw materials in weight percentage: 25% of dehydrated 1,4-butanediol, 25% of triethylenediamine, 15% of 2,2-bismorpholino diethyl ether and 35% of phenol solution , the solvent of the phenol solution is toluene, and the concentration of the phenol solution is 45wt%;

[0047] The B component includes the following raw materials in parts by weigh...

Embodiment 3

[0055] Corrosion-resistant spray polyurea, including A-component and B-component,

[0056] The A component includes the following raw materials in parts by weight: 25 parts of 4,4'-dicyclohexylmethane diisocyanate, 20 parts of toluene diisocyanate, 25 parts of hydroxyl-terminated fluorine-containing silicone oil, 25 parts of polyester polyol, and 1 part of catalyst And 40 parts of solvent, described solvent is xylene and butyl acetate compound solvent, and the volume ratio of described xylene and butyl acetate is 1:1; The molecular weight of described polyester polyol is 1000-1500;

[0057] The catalyst is prepared from the following raw materials in weight percent: dehydrated 1,4-butanediol 15%, triethylenediamine 15%, 2,2-bismorpholino diethyl ether 25% and phenol solution 45% , the solvent of the phenol solution is toluene, and the concentration of the phenol solution is 50wt%;

[0058] The B component includes the following raw materials in parts by weight: 15 parts of di...

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Abstract

The invention provides a corrosion-resistant spray polyurea. The invention firstly modifies isocyanate by hydroxyl-terminated fluorine-containing silicone oil to obtain a modified isocyanate prepolymer, thereby improving the acid and alkali corrosion resistance of the isocyanate prepolymer; In the preparation process of the polymer, considering that the activity of the catalyst should not be too strong, in order to avoid the reaction in the reaction process out of control, the trimerization reaction is carried out. Salt makes the reaction controllable and facilitates the reaction. In addition, the raw material polyester polyol in the A component used in the present invention reacts with alicyclic isocyanate and aromatic isocyanate to further improve the corrosion resistance of the isocyanate prepolymer and simultaneously improve the mechanical strength of the final polyurea; the present invention adopts The raw materials of component B and component A are reacted through proper proportioning, and the obtained polyurea has moderate viscosity, which can achieve good spraying, short surface drying time, and excellent resistance to strong acid and strong alkali.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a corrosion-resistant spray polyurea and a preparation method thereof. Background technique [0002] As a new coating material, polyurea has completely changed engineers' perception of previous coatings. Because no other coating material can withstand the full blow of a sledgehammer and the worst wear and tear like polyurea, while being flexible enough to crack concrete or deform steel structures where significant expansion and contraction occur , the coating film will not break, even under abnormal conditions such as pipeline protruding and sinking, it can still completely cover the entire workpiece surface. These excellent properties ensure the longevity and reliability of polyurea in engineering applications, and its service life of 30 to 50 years highlights the high cost performance of polyurea. [0003] Spray-type polyurea is easy to construct and has excellent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C09D5/08C08G18/66C08G18/42C08G18/61C08G18/32
Inventor 李鸿翔
Owner 李鸿翔