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A kind of fast-curing water-based epoxy concrete repair coating and preparation method thereof
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A water-based epoxy, fast-curing technology, applied in the field of coatings, can solve problems such as increased cost and hidden safety hazards in construction, and achieve the effects of fast curing speed, excellent adhesion, and improved stability and appearance.
Active Publication Date: 2020-12-15
GUANGZHOU ZEAL CHEM CO LTD
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However, this repair material needs to be added with inorganic salt accelerators such as sodium aluminate or lithium carbonate to quickly hydrate and harden the cement, so as to ensure the construction requirements and increase the cost. Moreover, inorganic salts such as sodium aluminate are inhaled through the human respiratory tract, which is easy to cause Bauxite lung, there are construction safety hazards
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Embodiment 1
[0029] The preparation of embodiment 1 waterborne epoxy resin emulsion
[0030] Weigh 60 g of E-51 epoxy resin, 6 g of environmentally friendly diluent and L-446 g of propylene glycol block polyether surfactant, mix well, heat to 75°C, add 80 g of deionized water at 2500 r / min rotation speed, Disperse for 20min to obtain a water-based epoxy resin emulsion, wherein the environmentally friendly diluent is prepared by mixing 5g of allyl glycidyl ether and 1g of epoxy-terminated silicone oil.
Embodiment 2-4 and
[0037] The preparation of embodiment 2-4 and comparative example 3-5 water-based epoxy concrete repair paint
[0038] The preparation raw material composition of embodiment 2-4 and comparative example 3-5 water-based epoxy concrete repair paint is shown in table 1 below:
[0039] Table 1 The raw material composition of each group of water-based epoxy concrete repair coatings
[0040]
[0041]
Embodiment 2
[0043] The preparation of embodiment 2 water-based epoxy concrete repair paint:
[0044] Weigh white cement and quartz sand, add them into a stirring pot, stir at a speed of 40r / min for 2min, then add water, water-based epoxy resin emulsion, triethylenetetramine, defoamer, polycarboxylate water reducer and swelling agent The water-based epoxy concrete repair coating can be obtained by stirring at a speed of 60r / min for 80min, and finally adding the color paste and stirring at a speed of 40-50r / min for 4-6min.
[0045] Examples 3-4 and Comparative Examples 3-5 refer to Example 2 for the preparation of waterborne epoxy concrete repair paints.
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Abstract
The invention relates to the field of coatings, in particular to a fast-curing water-based epoxy concrete repair coating and a preparation method thereof. The repair paint includes the following preparation raw materials by weight percentage: 5-7% of water-based epoxy resin emulsion, 3-4% of curing agent, 7-9% of water, 0.1-0.3% of defoamer, 40-40% of white cement 55%, quartz sand 20-35%, color paste 4-8%, polycarboxylate superplasticizer 0.15-0.3% and expansion agent 0.5-0.8%. The water-based epoxy concrete repair coating has the advantages of short setting time, fast curing speed, strong corrosion resistance, heavy load resistance, high compression resistance, high wear resistance, soft and beautiful color, etc. When used as maintenance and repair materials, There will be no obvious connection seams on the fracture surface, and the repaired position has good crack resistance, flexural strength and compressive strength. In addition, the preparation process is simple to operate, no sewage and harmful gases are generated, safe, reliable, energy-saving and environmentally friendly.
Description
technical field [0001] The invention relates to the field of coatings, in particular to a fast-curing water-based epoxy concrete repair coating and a preparation method thereof. Background technique [0002] Repair coatings are ground repair materials used for interior floor coating finishes in buildings. At present, the commonly used ground repair materials are paint and quick-drying cement. Among them, paint repair can ensure the same color, but since the paint is mainly painted on the cement mortar base, it is required to have good alkali resistance and good adhesion with the cement mortar to ensure that it will not fall off or peel during use. . In addition, paint repair also requires that the base surface must be flat, clean, dry, and firm. Multi-layer construction is required to make the surface flatness meet the design requirements. Otherwise, problems such as coloring, wrinkling, scratches and cracks, and poor covering power are likely to occur. . On the other ha...
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