High-density and low-permeability water-based exterior wall polymer coating material and preparation method thereof

Abstract

The high-density and low-permeable water-based exterior wall polymer coating material of the present invention is an emulsion with a small particle size and ultra-high Tg, and the special dispersant is anionic polycarboxylate ammonium salt, fine particle size sericite powder, emulsifying wax and organic silicon The four-part synergistic formula of the mixture of hydrophobic additives mainly improves the water permeability resistance of the paint film from the aspects of the compactness and hydrophobicity of the paint film. Compared with the conventional formula, the formula of the present invention has excellent water permeability resistance, excellent scrub resistance, etc., has a good function of protecting the wall surface, and satisfies the higher demands of consumers.

Description

technical field

[0001] The invention belongs to the field of coating properties, and in particular relates to a high-density and low-water-permeability water-based macromolecule coating material for exterior walls. Background technique

[0002] As consumers have higher and higher requirements for the functionality and decoration of coatings, most traditional coatings are far from meeting the requirements of consumers. Building exterior wall coatings have two main functions: decorative function and protective function. For the protection function, it means that the coating film of the paint can resist the erosion of rain, snow, ultraviolet rays, acid rain and dust, etc., and among these protective functions, one of the main functions is to prevent water from penetrating the coating and entering the wall The base material prevents water from harming the building's exterior wall structure and thermal insulation system, so the impermeability of the coating film has become one o...

Examples

Embodiment 1

[0048]Example 1: A preparation method of a high-density and low-permeability water-based exterior wall polymer coating material

[0049] The preparation method of the high-density and low-permeable water-based exterior wall polymer finishing material of the present invention comprises the preparation of the first mixture and the second mixture:

[0050] a. wherein said first mixture is prepared as follows:

[0051] Use a dispersing disc for preparation, under stirring conditions, mix the first part of water, thickener, pH regulator, defoamer, special dispersant, wetting agent, mica powder and pigment, filler and the second part of water evenly;

[0052] b. wherein said second mixture is prepared as follows:

[0053] Use the same dispersing disc for preparation, add film-forming substances, co-solvents, film-forming aids, mildew inhibitors, preservatives, rheological agents, hydrophobic aids and the third part of water to the first mixture and mix well , and prepare the secon...

Embodiment 2

[0086] Put 28 parts by weight of water into the dispersing tank, stir with a dispersing disc, and control the speed at 200-300 rpm; add 0.34 parts by weight of hydroxyethyl cellulose thickener, 0.1 part by weight of organic amine pH regulator , 0.5 parts by weight of special dispersant, 0.1 parts by weight of non-ionic wetting agent, 0.4 parts by weight of a combination of silicone defoamer and mineral oil defoamer (the weight ratio of the two is 1:3), 8 parts by weight of rutile Type titanium dioxide, 14 parts by weight of mica powder, 7 parts by weight of calcined kaolin, 11 parts by weight of heavy calcium carbonate, add 1 part by weight of water, increase the speed to 1500-1600 rpm, and disperse at a high speed for 15 ± 1 minute to obtain the first mixture; then the rotating speed is reduced to 600-800 rpm, and then 23 parts by weight of high Tg small particle size emulsion, 1.5 parts by weight of glycol co-solvent, 1.7 parts by weight of alcohol ester film-forming aid, 0.1...

technical field

[0001] The invention belongs to the field of coating properties, and in particular relates to a high-density and low-water-permeability water-based macromolecule coating material for exterior walls. Background technique

[0002] As consumers have higher and higher requirements for the functionality and decoration of coatings, most traditional coatings are far from meeting the requirements of consumers. Building exterior wall coatings have two main functions: decorative function and protective function. For the protection function, it means that the coating film of the paint can resist the erosion of rain, snow, ultraviolet rays, acid rain and dust, etc., and among these protective functions, one of the main functions is to prevent water from penetrating the coating and entering the wall The base material prevents water from harming the building's exterior wall structure and thermal insulation system, so the impermeability of the coating film has become one o...

Examples

Embodiment 1

[0048]Example 1: A preparation method of a high-density and low-permeability water-based exterior wall polymer coating material

[0049] The preparation method of the high-density and low-permeable water-based exterior wall polymer finishing material of the present invention comprises the preparation of the first mixture and the second mixture:

[0050] a. wherein said first mixture is prepared as follows:

[0051] Use a dispersing disc for preparation, under stirring conditions, mix the first part of water, thickener, pH regulator, defoamer, special dispersant, wetting agent, mica powder and pigment, filler and the second part of water evenly;

[0052] b. wherein said second mixture is prepared as follows:

[0053] Use the same dispersing disc for preparation, add film-forming substances, co-solvents, film-forming aids, mildew inhibitors, preservatives, rheological agents, hydrophobic aids and the third part of water to the first mixture and mix well , and prepare the secon...

Embodiment 2

[0086] Put 28 parts by weight of water into the dispersing tank, stir with a dispersing disc, and control the speed at 200-300 rpm; add 0.34 parts by weight of hydroxyethyl cellulose thickener, 0.1 part by weight of organic amine pH regulator , 0.5 parts by weight of special dispersant, 0.1 parts by weight of non-ionic wetting agent, 0.4 parts by weight of a combination of silicone defoamer and mineral oil defoamer (the weight ratio of the two is 1:3), 8 parts by weight of rutile Type titanium dioxide, 14 parts by weight of mica powder, 7 parts by weight of calcined kaolin, 11 parts by weight of heavy calcium carbonate, add 1 part by weight of water, increase the speed to 1500-1600 rpm, and disperse at a high speed for 15 ± 1 minute to obtain the first mixture; then the rotating speed is reduced to 600-800 rpm, and then 23 parts by weight of high Tg small particle size emulsion, 1.5 parts by weight of glycol co-solvent, 1.7 parts by weight of alcohol ester film-forming aid, 0.1...

Images