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Waterborne polyurethane dampproof anticorrosive coating and preparation method thereof

A water-based polyurethane and anti-corrosion coating technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, anti-fouling/underwater coatings, etc., can solve the problems of lack of toughness, brittleness, poor water resistance and erosion resistance, etc. Good salt spray resistance, high gloss, and the effect of improving moisture resistance

Active Publication Date: 2015-07-22
黎芷杉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic anti-corrosion and wear-resistant coatings are generally water-soluble coatings based on inorganic binders, which have poor water resistance and erosion resistance and are not suitable for working conditions in humid environments; general organic anti-corrosion and wear-resistant coatings It is prepared by using epoxy resin as a binder and adding a certain amount of large particle ceramic aggregate and curing agent.
Although epoxy resin has excellent bonding force and mechanical strength, it lacks toughness and is brittle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] First, in parts by weight, 40 parts of modified polyurethane composite emulsion, 3 parts of mica powder with a particle size of 100 μm, 0.1 part of hydroxyethyl cellulose, 0.1 part of methyl silicone oil, 3 parts of pigment titanium dioxide, and stabilizer ethylenediamine 5 parts, 5 parts of preservative, 0.1 part of dibutyl phthalate, 0.5 part of zirconium-aluminate coupling agent, 0.1 part of polyacrylate solution, 3 parts of dispersant polyethylene glycol 200, auxiliary agent poly 0.1 part of dimethylsiloxane and 5 parts of water are prepared;

[0045] Mix water, dispersant polyethylene glycol 200, pigment titanium dioxide, mica powder with a particle size of 100 μm, zirconium-aluminate coupling agent and methyl silicone oil according to the formula amount, and then disperse with a sand mill. It takes 61-70min to prepare the pigment and filler slurry; add the modified polyurethane composite emulsion of the formula amount into the container, and add the pigment and f...

Embodiment 2

[0047] First, in parts by weight, 45 parts of modified polyurethane composite emulsion, 6 parts of titanium dioxide with a particle size of 200 μm, 0.2 part of hydroxyethyl cellulose, 0.2 part of methyl silicone oil, 4 parts of pigment carbon black, and hexamethylenediamine as a stabilizer 6 parts, 6 parts of preservatives, 0.2 parts of dibutyl phthalate, 0.7 parts of zirconium-aluminate coupling agent, 0.2 parts of polyacrylate solution, 4 parts of dispersant polyethylene glycol 400, auxiliary agent poly 0.2 parts of phenylmethylsiloxane and 8 parts of water are prepared;

[0048] Stir water, dispersant polyethylene glycol 400, pigment carbon black, titanium dioxide with a particle size of 200 μm, zirconium-aluminate coupling agent and methyl silicone oil according to the formula amount, and then disperse with a sand mill. 61-70min to prepare the pigment and filler slurry; add the modified polyurethane composite emulsion of the formula into the container, and add the pigment...

Embodiment 3

[0050] First, 50 parts of modified polyurethane composite emulsion, 10 parts of talcum powder with a particle size of 300 μm, 0.3 part of hydroxyethyl cellulose, 0.3 part of methyl silicone oil, 5 parts of pigment iron red, and stabilizer diethylene triethylene were prepared in parts by weight. 7 parts of amine, 7 parts of preservative, 0.3 part of dibutyl phthalate, 1 part of zirconium-aluminate coupling agent, 0.3 part of polyacrylate solution, 5 parts of polyethylene glycol 200, auxiliary polyether 0.3 parts of modified polydimethylsiloxane and 8 parts of water are prepared;

[0051] Stir water, polyethylene glycol 200, pigment iron red, talc powder with a particle size of 300 μm, zirconium-aluminate coupling agent and methyl silicone oil according to the formula, and then disperse them with a sand mill. The dispersion time is 61 —70min, the pigment and filler slurry is prepared; the modified polyurethane composite emulsion of formula quantity is added in the container, ...

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Abstract

The invention discloses waterborne polyurethane dampproof anticorrosive coating and a preparation method thereof. The waterborne polyurethane dampproof anticorrosive coating comprises modified polyurethane composite emulsion, packing, hydroxyethyl cellulose, a preservative, methylsilicone oil, phthalic acid dibutyl ester, a zirconium-aluminic acid ester coupling agent, pigment, a hardening agent, an acrylic ester solution, a dispersing agent, additives and water. The preparation method comprises the following steps: uniformly stirring the water, dispersing agent, pigment, packing, zirconium-aluminic acid ester coupling agent and methylsilicone oil, and dispersing for 61-70 minutes by using a sand mill so as to prepare pigment packing slurry; adding the modified polyurethane composite emulsion into a container, adding the pigment packing slurry, the preservative, the acrylic ester solution and the additives when stirring for 21-30 minutes at the stirring speed of 410-450r / minute, and after stirring for 5-10 minutes, adding hydroxyethyl cellulose; finally, filtering by using a silk filtering net of 160 meshes, and mixing and stirring the obtained filtrate with 5-7 parts of the hardening agent, thereby obtaining the waterborne polyurethane dampproof anticorrosive coating. The waterborne polyurethane dampproof anticorrosive coating has the characteristics of good chemical resistance, good water resistance, good damproof effect, high glossiness, long film service life and the like.

Description

technical field [0001] The invention relates to a preparation method of a paint, in particular to a water-based polyurethane moisture-proof and anti-corrosion paint, which belongs to the technical field of chemical composition and its preparation. Background technique [0002] In order to study paints with volatile organic compounds (VOC) below the regulations, paint scientists have so far created a series of new paint and coating technology systems: powder coatings, radiation-cured coatings (UV / EB systems), water-based coatings , High-solid coatings and solvent-free coatings, among which powder coatings and radiation-cured coatings require special equipment for construction; although high-solid coatings are very close to ordinary solvent-based coatings in performance, they are still inconvenient in construction For example, construction equipment is difficult to clean and thermal sag phenomenon, etc.; and solvent-free coatings generally refer to solvent-free epoxy floor coa...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/08C09D5/14C09D7/12C08G18/76C08G18/65C08G18/58C08G18/32C08G18/10
CPCC08G18/10C08G18/3206C08G18/58C08G18/584C08G18/6517C08L2205/035C09D5/08C09D5/14C09D7/63C09D175/04C08L1/284C08L83/04C08L33/04C08K13/02C08K5/47C08K2003/2241C08K3/34C08K5/17C08K5/12C08K3/04C08K2003/2272
Inventor 谢刚周帆周子茜
Owner 黎芷杉
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