Styrene-acrylic emulsion for architectural coatings and preparation method and use in coating
A technology of styrene-acrylic emulsion and architectural coatings, applied in the directions of architecture, building structure, coating, etc., can solve the problems to be improved, and achieve the effect of excellent water resistance and high tensile bond strength
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Embodiment 1
[0039] The construction technology of water-resistant granite coating includes the following steps:
[0040] S1 base treatment: remove the sundries on the coating base surface, and use cement to fill up the local unevenness or surface cracks to ensure the base surface is smooth;
[0041] S2 Spraying primer: Apply primer evenly on the coating base surface to form a primer film with a thickness of 0.1mm for back sealing treatment; when applying primer, the small surface should be applied first, then the large surface, from top to bottom Brush evenly;
[0042] S3 Topcoat construction: 24 hours after the primer is applied, carry out the first topcoat construction on the primer-coated base surface to form a topcoat film with a thickness of 0.1mm; the first topcoat construction After 24 hours, carry out the second top coating construction, and form a top paint film with a thickness of 0.1mm again;
[0043] S4 Partial elastic lines, grids, adhesive tapes: according to the design re...
Embodiment 2
[0049] It is basically the same as Example 1, the only difference is:
[0050] The preparation process of the water-resistant granite coating is as follows: add 100 g of deionized water to the container, and then add 3 g of dispersant, 1 g of wetting agent, 0.5 g of defoamer and hydroxyethyl methylcellulose in succession under stirring at 300 rpm. 1g of plain ether; after adding, increase the speed to 1000 rpm, stir for 5 minutes, then add 40g of film-forming aid, and stir for 3 minutes; then reduce the speed to 500 rpm, add 300g of styrene-acrylic emulsion, and stir for 20 minutes , using sodium hydroxide to adjust the pH to 8, and continue to stir for 5 minutes to obtain a slurry; under stirring at 500 rpm, add 800 g of 40-mesh natural colored sand to the slurry while stirring, and increase the speed to 800 after adding rev / min, stirring for 5 minutes; under stirring at 800 rev / min, add 1g of anti-corrosion and anti-fungal agent, 0.5g of defoamer and 0.1g of thickener successi...
Embodiment 3
[0053] It is basically the same as Example 2, except that the styrene-acrylic emulsion is styrene-acrylic emulsion for architectural coatings.
[0054] The styrene-acrylic emulsion for the architectural coating is obtained by the following method:
[0055] (1) Preparation of nuclear layer pre-emulsion: dissolve 10 g of sodium methacrylate hydroxypropyl sulfonate with 200 g of water, stir at 600 rpm for 10 minutes, then add 50 g of styrene, 200 g of isooctyl acrylate, and 4 g of acrylamide , methacrylic acid 4g, potassium persulfate 2g, stirred for 30 minutes with 600 revs / min, obtained nuclear layer pre-emulsion;
[0056] (2) Preparation of shell pre-emulsion: dissolve 10 g of sodium methacrylate hydroxypropyl sulfonate with 200 g of water, stir at 600 rpm for 10 minutes, then add 100 g of styrene, 50 g of methyl methacrylate, and isoacrylate Octyl ester 100g, acrylamide 4g, methacrylic acid 4g, N-methylolacrylamide 4g, potassium persulfate 2g, stirred at 600 rpm for 30 minut...
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