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Spraying polyurea elastomer and preparation method thereof

A polyurea elastomer, modification technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve problems such as aggravation, cracking of sprayed polyurea elastomer coatings, severe chemical erosion, etc., to achieve chemical resistance Good product performance, good anti-corrosion effect, high emulsification efficiency

Active Publication Date: 2021-08-10
东营海瑞宝新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some special areas, such as wastewater collection ponds with high chemical content, especially in high acidity environments, chemical erosion is severe, and the corrosion and cracking of sprayed polyurea elastomer coatings are aggravated. Therefore, it is necessary to further improve its resistance. Chemical resistance, or make it have a certain self-healing ability to resist harsh environments and prolong its service life

Method used

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  • Spraying polyurea elastomer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The present embodiment provides a kind of preparation method of spray polyurea elastomer, comprises the following steps:

[0057] Step S100, preparing self-healing microcapsules:

[0058] Mix and stir 1g hydrolyzed polystyrene-maleic anhydride nanoparticles and 99g deionized water to obtain the first dispersion; mix and stir 35g phenol, 35g acetaldehyde and 30g deionized water, and use 10% The sodium hydroxide solution adjusts its pH value to 9-10, and the first prepolymer is obtained after reacting for 3-5 hours; the first prepolymer and the first dispersion are mixed evenly, and the hydrochloric acid solution with a mass fraction of 10% Adjust its pH value to 3-5 to obtain the second dispersion; mix the second dispersion with 4g resorcinol and 4g ammonium chloride, and obtain the third dispersion after ultrasonic dissolution; drop 210g of dicyclopentadiene Add it to the third dispersion, heat up to 60-70°C after ultrasonic emulsification for 10-15 minutes, adjust its...

Embodiment 2

[0066] The present embodiment provides a kind of preparation method of spray polyurea elastomer, comprises the following steps:

[0067] Step S100, preparing self-healing microcapsules:

[0068] Mix and stir 1g hydrolyzed polystyrene-maleic anhydride nanoparticles and 99g deionized water to obtain the first dispersion liquid; mix and stir 35g cresol, 35g formaldehyde and 30g deionized water, and use 10% The sodium hydroxide solution adjusts its pH value to 9-10, and the first prepolymer is obtained after reacting for 3-5 hours; the first prepolymer and the first dispersion are mixed evenly, and the hydrochloric acid solution with a mass fraction of 10% Adjust its pH value to 3-5 to obtain the second dispersion; mix the second dispersion with 4g tea polyphenols and 4g ammonium chloride, and obtain the third dispersion after ultrasonic dissolution; add 210g of dicyclopentadiene dropwise In the third dispersion liquid, heat up to 60-70°C after ultrasonic emulsification for 10-15...

Embodiment 3

[0076] The present embodiment provides a kind of preparation method of spray polyurea elastomer, comprises the following steps:

[0077] Step S100, preparing self-healing microcapsules:

[0078]1g of hydrolyzed polystyrene-maleic anhydride nanoparticles and 99g of deionized water were mixed and stirred evenly to obtain the first dispersion; 35g of phenol, 35g of paraformaldehyde and 30g of deionized water were mixed and stirred evenly, with a mass fraction of 10% The pH value of the sodium hydroxide solution is adjusted to 9 to 10, and the first prepolymer is obtained after 3 to 5 hours of reaction; the first prepolymer and the first dispersion are mixed uniformly, and the mass fraction is 10% hydrochloric acid The pH value of the solution was adjusted to 3-5 to obtain the second dispersion; the second dispersion was mixed with 4g resorcinol and 4g ammonium chloride, and the third dispersion was obtained after ultrasonic dissolution; 210g dicyclopentadiene Add it dropwise to ...

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Abstract

The invention relates to the technical field of spraying polyurea elastomers, and provides a spraying polyurea elastomer and a preparation method thereof. The preparation method comprises the following steps that S100, preparation of self-repairing microcapsules: specifically, a solid particle emulsifier, phenol, aldehyde, deionized water, polyphenol, ammonium chloride and dicyclopentadiene react to prepare the self-repairing microcapsules; step S200, preparation of a component A: uniformly mixing and stirring polyether amine, self-repairing microcapsules, fiber filler, diethyltoluenediamine and a Grubbs catalyst; step S300, preparing a component B: mixing isocyanate and polyether polyol, and reacting to obtain an isocyanate prepolymer; step S400, preparing a spraying polyurea elastomer: spraying the component A and the component B on the surface of a base material according to the volume ratio of 1: 1 through a spraying machine, and reacting to obtain the spraying polyurea elastomer. The spraying polyurea elastomer has a self-repairing function and is good in mechanical property and chemical corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of sprayed polyurea elastomers, in particular to a sprayed polyurea elastomer and a preparation method thereof. Background technique [0002] Spraying polyurea elastomer is a new type of environmentally friendly coating technology and the latest development of structural waterproof technology. It uses special spraying equipment to spray solvent-free polyurea system onto the substrate to quickly form sprayed polyurea elastomer. Coatings, sprayed polyurea elastomer coatings show the advantages of high resistance to environmental influences, high chemical resistance and fast curing, its elastomeric properties protect the substrate from mechanical stress, while its high chemical resistance protects the substrate Material is protected from chemical attack. However, in some special areas, such as wastewater collection ponds with high chemical content, especially in high acidity environments, chemical erosion is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/08C09D7/65C09D7/62
CPCC09D175/02C09D5/08C09D7/65C09D7/62C09D7/70C08L2205/035C08L2205/16C08L61/06C08L35/06C08L77/10C08K9/10C08K5/01C08K9/04C08K7/14
Inventor 李强王晓刚朱忠杰
Owner 东营海瑞宝新材料有限公司
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