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Preparation method for acid-and-alkali-resistant waterborne epoxy coating for ships

A water-based epoxy coating, acid and alkali resistance technology, used in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve problems such as poor impact resistance, achieve good acid and alkali resistance, excellent toughening effect, flexibility good effect

Inactive Publication Date: 2019-04-12
ANHUI KAILIN ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the impact resistance of waterborne epoxy coatings is poor, which needs to be solved urgently

Method used

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  • Preparation method for acid-and-alkali-resistant waterborne epoxy coating for ships
  • Preparation method for acid-and-alkali-resistant waterborne epoxy coating for ships

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method of acid and alkali resistant water-based epoxy paint for ships, comprising the steps of:

[0021] S1. Mix 30 kg of cationic silica hydrogel with a mass fraction of 20 wt%, 20 kg of aluminum chloride, 25 kg of citric acid, 60 kg of polyvinyl alcohol 6000, and 320 kg of water, add 2 kg of microcrystalline paraffin and stir for 35 minutes at a temperature of 120 ℃, homogenize until the particle size is 100-130nm, add ammonia water with a concentration of 30wt% dropwise under stirring until the pH of the system is 8.5-9.5, stir for 25min, hydrothermally react for 24h, hydrothermally react at 240℃, centrifuge , washed, dried, calcined at 950°C for 8min, and cooled to obtain the first material;

[0022] S2. Stir 200kg of water, 0.04kg of catalyst, 1.4kg of urea-formaldehyde resin, 1kg of phenol-blocked isocyanate-based polyurethane resin, 2kg of anti-settling agent, 1kg of dispersant, 2.5kg of leveling agent, and 2kg of defoamer, at a stirring spe...

Embodiment 2

[0025] A kind of preparation method of acid and alkali resistant water-based epoxy paint for ships, comprising the steps of:

[0026] S1. Mix 40kg of cationic silica hydrogel with a mass fraction of 16wt%, 30kg of aluminum chloride, 15kg of citric acid, 80kg of polyvinyl alcohol 6000, and 240kg of water, add 4kg of microcrystalline paraffin and stir for 25min at a temperature of 130 ℃, homogenize until the particle size is 100-130nm, add ammonia water with a concentration of 20wt% dropwise under stirring until the pH of the system is 8.5-9.5, stir for 35min, perform hydrothermal reaction for 20h, the temperature of hydrothermal reaction is 260℃, centrifuge , washed, dried, calcined at 850°C for 16 minutes, and cooled to obtain the first material;

[0027] S2. Stir 120kg water, 0.1kg catalyst, 0.6kg urea-formaldehyde resin, 2kg phenol-blocked isocyanate-based polyurethane resin, 1kg anti-settling agent, 2kg dispersant, 1.5kg leveling agent, and 4kg defoamer evenly at a stirring...

Embodiment 3

[0030] A kind of preparation method of acid and alkali resistant water-based epoxy paint for ships, comprising the steps of:

[0031] S1, 33kg mass fraction is 19wt% cationic silica hydrogel, 22kg aluminum chloride, 22kg citric acid, 65kg polyvinyl alcohol 6000, 300kg water are mixed evenly, add 2.5kg microcrystalline paraffin and stir 32min, stirring temperature is 122°C, homogenize until the particle size is 100-130nm, add ammonia water with a concentration of 28wt% dropwise under stirring until the pH of the system is 8.5-9.5, stir for 28min, hydrothermally react for 23h, and the hydrothermally react at a temperature of 245°C. centrifuged, washed, dried, calcined at 920°C for 10 minutes, and cooled to obtain the first material;

[0032] S2, 180kg water, 0.06kg catalyst, 1.2kg urea-formaldehyde resin, 1.3kg phenol-blocked isocyanate-based polyurethane resin, 1.7kg anti-settling agent, 1.4kg dispersant, 2.2kg leveling agent, 2.5kg defoamer are stirred evenly, Stirring speed ...

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Abstract

The invention discloses a preparation method for an acid-and-alkali-resistant waterborne epoxy coating for ships. The preparation method comprises the following steps: uniformly mixing a cationic silica hydrogel, aluminum chloride, citric acid, polyvinyl alcohol 6000 and water, adding microcrystalline wax, carrying out stirring, carrying out homogenization treatment, dropwise adding ammonia waterunder stirring, carrying out stirring, carrying out a hydrothermal reaction, and carrying out centrifuging, washing, drying, calcining and cooling so as to obtain a first material; uniformly mixing water, a catalyst, urea formaldehyde resin, phenol-blocked isocyanate-based polyurethane resin, an anti-settling agent, a dispersant, a leveling agent and an anti-foaming agent under stirring, then adding the first material, fly ash, diatomite, precipitated barium sulfate, coal gangue powder and carbon nanotube, and carrying out stirring so as to obtain a second material; and stirring waterborne bisphenol-A epoxy resin and organosilicone epoxy resin, continuing adding coumarone resin, sodium lignosulfonate and octaphenyl polyoxyethyiene, continuing stirring, then adding the second material, andcarrying out uniform mixing so as to obtain the acid-and-alkali-resistant waterborne epoxy coating for the ships.

Description

technical field [0001] The invention relates to the technical field of marine coatings, in particular to a method for preparing an acid and alkali-resistant water-based epoxy coating for ships. Background technique [0002] At present, most of the acid and alkali-resistant coatings for ships in my country use traditional solvent-based coatings, which contain heavy metal compounds such as chromium or lead, which are highly toxic and cause great harm to the marine environment and human health. The research and development of environmentally friendly water-based cabin coatings has very important practical significance for improving the living environment of inner cabins. At present, the impact resistance of waterborne epoxy coatings is poor, which needs to be solved urgently. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a method for preparing an acid and alkali resistant waterborne ep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61C09D7/62C09D7/65
CPCC08K2003/3045C08K2201/014C08L2205/025C08L2205/035C09D5/08C09D7/61C09D7/62C09D7/65C09D7/70C09D163/00C08L63/00C08L45/02C08L97/005C08L71/02C08L75/04C08L61/24C08K13/06C08K9/08C08K9/10C08K3/36C08K7/26C08K3/30
Inventor 王厚国李子荣王和山王和东殷东楼殷芳荣曹文强张万霞张萍
Owner ANHUI KAILIN ADVANCED MATERIAL CO LTD
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