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Preparation method of long-acting antifouling emulsion paint for exterior walls

A latex paint and anti-fouling technology, applied in latex paint, biocide-containing paint, anti-fouling/underwater paint, etc., can solve the problems of uneven latex surface, reduced service life, poor stain resistance, etc. , to achieve the effect of improving anti-bubble property, reducing self-aggregation ability and improving stain resistance

Inactive Publication Date: 2019-06-04
雷洪云
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is: the water resistance of the traditional exterior wall latex paint is not high, after soaking in water, bubbles can be formed in the process of water evaporation, thereby reducing the service life of the product, and, because the traditional exterior wall latex paint surface Concave and convex, easy to absorb stains, resulting in poor stain resistance of the product, a preparation method for long-term stain-resistant exterior wall latex paint is provided

Method used

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Embodiment Construction

[0027]Mix sodium lignosulfonate solution with a mass fraction of 10-15% and formaldehyde in a beaker at a mass ratio of 12:1, and add sodium sulfite 1 to 4 times the mass fraction of formaldehyde to the beaker, with a mass fraction of 5-12%. The sodium hydroxide solution adjusts the pH of the material in the beaker to 10-11, and after stirring and reacting for 2-3 hours at a temperature of 90-95°C and a rotation speed of 300-320r / min, the pretreated sodium lignosulfonate is obtained. Solution, mix the pretreated sodium lignosulfonate solution and potassium iodide in a three-necked flask at a mass ratio of 90:1 to 100:1, and add 1 -bromohexane solution, control the addition rate of 1-bromohexane solution to be 8-10mL / min, and simultaneously use a sodium hydroxide solution with a mass fraction of 5-10% to control the pH of the material in the three-necked flask to be 11.0-11.5, and After stirring and reacting at a temperature of 80-85°C and a rotational speed of 230-350r / min for...

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Abstract

The invention discloses a preparation method of long-acting antifouling emulsion paint for exterior walls and belongs to the technical field of building materials. The preparation method comprises thefollowing steps: modifying polystyrene microspheres with concentrated sulfuric acid to prepare sulfonated polystyrene microspheres, making the sulfonated polystyrene microspheres into modified polystyrene microspheres with hydrophilic surface and hydrophobic inside by using a pore-foaming agent and modified sodium lignosulphonate, grafting a flexible segment containing a hydroxyl group onto the surface of nano-silica by using isocyanate, epoxy resin and organic amine, adding the modified polystyrene microspheres and modified silica to the product, simultaneously adding modified peanut shell fiber, a treating agent and water-soluble carbodiimide so as to prepare the long-acting antifouling emulsion paint for exterior walls. The prepared emulsion paint has excellent hydrophilicity on the surface, and the hydrophilic substance is not easy to loss. Thereby, the product has long-acting fouling resistance.

Description

technical field [0001] The invention discloses a preparation method of a long-acting stain-resistant exterior wall latex paint, which belongs to the technical field of building materials. Background technique [0002] Latex paint is a kind of water-based paint that uses water as the dispersion medium, polymer emulsion as the film-forming substance, and is synthesized through a certain process by adding pigments, fillers and additives. Because latex paint has the characteristics of low cost, less pollution, convenient construction and beautiful appearance, it is widely used in architectural coatings. [0003] Building exterior wall latex paint encounters rainy weather in the early stage of construction, which is prone to blistering or peeling, which will affect the adhesion of the coating film, resulting in uneven gloss and color of the coating film, and poor durability of the coating film. Therefore, Improving the water resistance of latex paint and the anti-foaming of the ...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D125/06C09D199/00C09D5/02C09D5/16C09D7/63C09D7/65C08F8/36C08F112/08
Inventor 雷洪云方凯薛丞
Owner 雷洪云
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