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A kind of air-drying room temperature curing waterborne epoxy waterproof coating and its preparation method and application

A room temperature curing, waterproof coating technology, applied in the field of coatings, can solve the problems of complex process, unsatisfactory performance, low strength, etc., achieve the effect of reducing VOC, excellent surface water resistance, and conducive to the formation of dense coating film and curing molding

Active Publication Date: 2020-07-28
GUANGZHOU CHEM GROUTING CO LTD CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is complicated, and the performance is often not ideal, especially when the water content is high, due to the influence of emulsifier and crosslinking density, the strength is low, and the volume shrinkage is obvious during curing

Method used

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  • A kind of air-drying room temperature curing waterborne epoxy waterproof coating and its preparation method and application
  • A kind of air-drying room temperature curing waterborne epoxy waterproof coating and its preparation method and application
  • A kind of air-drying room temperature curing waterborne epoxy waterproof coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation of embodiment 1 bisactive polyamide

[0045] Add 2.2 moles of tetraethylenepentamine 415.8 grams and 564 grams of high-purity dimer acid ATUREX 1001 (dimer C 36 Dibasic acid content 99.1wt%, Jiangxi Aiturek Industrial Co., Ltd., 1 mole) and 56 grams of linoleic acid (reagent, purity 97%), heated to 150 ° C for 2 hours, then heated to 180 ° C for 2 hours And remove water, cool, obtain double active polyamide PA1, standby. Tested by infrared spectroscopy, it is obtained as figure 1 The infrared spectrum shown. figure 1 Medium 1645.77cm -1 Absorption peak of amide bond, 3009cm -1 is the C-H absorption peak on the unsaturated C=C double bond; from figure 1 It can be seen that PA1 has the active N-H that reacts with epoxy groups, and the active C=C that catalyzes the oxidation reaction of metals, that is, PA1 has dual activities, and can undergo ring-opening polymerization with epoxy resins, and can also contact air. Catalytic oxidation curing, that is,...

Embodiment 2

[0046] The preparation of embodiment 2 bisactive polyamide

[0047] Add 2.1 moles of tetraethylenepentamine 396.9 grams and 504 grams of high-purity dimer acid ATUREX 1001 and 28.2 grams of linolenic acid (reagent, purity 95%) in the there-necked flask of 2000 milliliters, be warming up to 150 ℃ of reaction 2 hours, then Raise the temperature to 200°C for 2 hours, 260°C for 2 hours, remove the water, and cool to obtain bisactive polyamide PA2, which is ready for use. Tested by infrared spectroscopy, we get figure 2 The infrared spectrum shown. figure 2 Middle 1654cm -1 It is the amide bond absorption peak, 1610cm -1 It is part of the amide bond and the N-H on the amine group for further high-temperature dehydration or cyclization to form the C=N absorption peak on the imidazoline ring, 3006cm -1 is the C-H absorption peak on the unsaturated C=C double bond; from figure 2 It can be seen that PA2 has both active N-H that reacts with epoxy groups and active C=C that catal...

Embodiment 3

[0048] Embodiment 3 preparation of bisactive polyamide

[0049] Add 378 grams of tetraethylenepentamine, 146 grams of triethylenetetramine, 77.5 grams of N-aminoethylpiperazine and 564 grams of high-purity dimer acid ATUREX 1001 and 460 grams of industrial linolenic acid (fatty acid) in a three-necked bottle of 2000 milliliters Composition: 56wt% of linolenic acid, 17wt% of linoleic acid, 25wt% of oleic acid, 2wt% of other fatty acids), heated up to 180°C for 8 hours and removed water, cooled to obtain bisactive polyamide PA3, set aside.

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Abstract

The invention belongs to the technical field of paint, and discloses an air-dry room temperature curing water-based epoxy waterproof paint and a preparation method and application thereof. The preparation method of the waterproof paint comprises the steps of: premixing an epoxy resin system, a compound amine curing agent and an organometallic carboxylate drier, adding aqueous-phase slurry, performing even stirring, and carrying out curing at room temperature to obtain the waterproof paint; the compound amine curing agent comprises bi-active polyamide, a reactive diluent, a polyamine-epoxy adduct, polyamine, phenolic amine and an assistant. The waterproof paint has excellent waterproof performance, and can be used as anticorrosive paint, interface treatment agents, pore-sealing agents, grouting materials and porous moulds with pore-sealed surfaces.

Description

technical field [0001] The invention belongs to the technical field of coatings, and more specifically relates to an air-drying room-temperature-curing water-based epoxy waterproof coating and a preparation method and application thereof. Background technique [0002] Waterborne epoxy coatings have excellent physical and chemical properties such as good adhesion, excellent chemical and solvent resistance, high hardness, good wear resistance, thermal stability and strong corrosion resistance, and are widely used by people. s concern. Epoxy coatings are divided into solvent-based epoxy coatings, high-solids (less solvent) coatings, liquid solvent-free epoxy coatings, powder-based epoxy coatings, and underwater epoxy or epoxy-modified coatings. [0003] Traditional epoxy resin coatings are generally solvent-based, causing serious pollution and serious damage to people's health. Water-based epoxy coatings have low VOC content, low odor, and are safe to use, meeting the social ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C08G59/68C08G59/60C08G59/44
CPCC08G59/44C08G59/60C08G59/68C09D163/00
Inventor 黄月文杨元龙王斌曾娟娟陈绪港
Owner GUANGZHOU CHEM GROUTING CO LTD CAS
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