Single-component cationoid water-soluble epoxy-polyurethane anticorrosion primer system drying at 150 DEG C

A cationic, water-based epoxy technology, used in polyurea/polyurethane coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve problems such as serious water resistance and achieve excellent construction performance, good overall performance, and good elasticity. Effect

Inactive Publication Date: 2009-02-11
江泽平 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. The use of thickeners and emulsifiers has a serious impact on the water resistance of the coating film after curing;

Method used

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  • Single-component cationoid water-soluble epoxy-polyurethane anticorrosion primer system drying at 150 DEG C

Examples

Experimental program
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Effect test

preparation example Construction

[0024] The preparation method of above-mentioned aqueous cationic epoxy resin is characterized in that it comprises the following steps:

[0025] (1) Preparation of modified epoxy resin: Put 20-35 parts of epoxy resin, 10-30 parts of alcohol ethers and ketone solvents into the reaction kettle, stir and dissolve at 50°C-80°C for 1 hour, then add 0.5% fatty amine -2 parts were reacted at 80°C-90°C for 2-3 hours; after the reaction was completed, 10-25 parts of ketimine resin was added dropwise at 75°C-90°C into the reactor and kept warm for 1.5-2.5 hours to obtain modified epoxy resin;

[0026] (2) Preparation of curing agent: Put 5-20 parts of aromatic polyisocyanate into the reaction pot, add or drop 3-30 parts of alcohol ether monohydroxyl compound or heterocyclic hydroxyl-containing compound in batches at 20-50°C, 0-80 parts of polyether or polycarbonate diol (if the polycarbonate diol or polyether needs to be dissolved in a solvent in advance); then keep warm at 40-60°C fo...

Embodiment 1

[0029] Put 76 parts of TDI into the reaction pot, start stirring and add 46 parts of tetrahydrofurfuryl alcohol in batches below 50°C, keep warm at 50°C for half an hour, then raise the temperature to 80°C and keep warm for 2 hours to obtain a semi-closed polyurethane curing agent.

Embodiment 2

[0031] Put 33.4 parts of acetylacetone, 55.3 parts of TDI, 1 part of dimethylethanolamine, and 80 parts of solvent butanone into the reaction pot, heat and stir, heat at 70°C for 30 minutes, then raise the temperature to 85°C and react for 4 hours to obtain the closed type Polyurethane curing agent.

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PUM

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Abstract

The invention discloses a single-component (150DEG C) drying cation typed waterborne epoxy-polyurethane antisepsis primer system, comprising waterborne cation epoxy resin, pigment/filling material, nontoxic drier, dispersant and deionized water; all components of the invention are mixed and dispersed at high speed, statically arranged and grinded so as to prepare the single-component (150DEG C) drying cation typed waterborne epoxy-polyurethane antisepsis primer system. The single-component (150DEG C) drying cation typed waterborne epoxy-polyurethane antisepsis primer system has excellent construction performance, excellent alkali-resistance, waterproofing and salt spray resistance performance of film and good comprehensive performance. The single-component (150DEG C) drying cation typed waterborne epoxy-polyurethane antisepsis primer system can be applied to industrial antisepsis coating of automobiles, engineering machines, agricultural vehicles, and the like, antisepsis coating of hardware, electric apparatus industries, and paints used for repairing of electrophoresis.

Description

technical field [0001] The invention relates to the field of chemical products and preparation methods, in particular to a cationic environment-friendly water-based redox-polyurethane anticorrosion primer system. Background technique [0002] Compared with solvent-based polyurethane, water-based polyurethane paint uses water as the dispersion medium, which is energy-saving, environmentally friendly, safe, and water is cheap and easy to obtain, which significantly reduces costs, so it has attracted more and more attention. [0003] At present, polyurethane water-based coatings mainly use the principle of anionic system. The principle of non-ionic polyurethane dispersion system is also applied within a certain range (see "Water Dispersion Coatings", edited by Liu Guojie, page 152). The many outstanding advantages of polyurethane water-based coatings will not be described in detail here. At present, its shortcomings are mainly manifested in the following four aspects: [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D175/04C09D5/08
Inventor 江泽平
Owner 江泽平
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