CN1151220C - Nanometer paint for external wall and its preparation - Google Patents

Abstract

The present invention reveals external wall nanometer paint and a preparation method thereof. The present invention comprises the main components: 17 to 28 parts by mass of pure water, 0.42 to 0.95 parts by mass of wetting-dispersing agent, 0.3 to 0.8 parts by mass of nanometer antibacterial powder, 3.14 to 4.73 parts by mass of nanometer silicone base oxide, 13 to 24 parts by mass of titanium dioxide, 0.61 to 0.89 parts by mass of nanometer titanium oxide, 27 to 42 parts by mass of emulsion, 8 to 17 parts by mass of filling material, a film forming additive, etc. The external wall nanometer paint made by adopting the formula and the preparation method of the present invention has the advantages of no toxicity, no odor, no environment pollution, excellent pollution resistance, mildew resistance, algae resistance and long acting bacterium resistance, so the external wall nanometer paint is a green environment protection type paint, and can be used in building materials, such as concrete, cement mortar, asbestos tile, etc.

Description

Nanometer paint for external wall and preparation method thereof

Technical field

The present invention relates to a kind of building coating and preparation method thereof, particularly relate to a kind of nanometer paint for external wall and preparation method thereof.

Background technology

Traditional building coating is divided into oil paint and water-borne coatings two big classes usually, contains toxic substances such as organic solvent evaporates thing and heavy metal in view of oil paint, progressively suffers exit.Water-borne coatings is then because of there is poor, the problem such as easily stain, easily go mouldy of anti-ultraviolet property.Particularly waterproof, anti-soda acid, scrub performance are poor, cause the outward appearance of buildings to be subjected to bigger influence.

For addressing these problems, in recent years, all in succession the various performances that improve coating have been launched development both at home and abroad.Disclosed a kind of antimicrobial acrylic resin exterior coating as JP09157549.Adopt 500 parts acrylic ester emulsion, 125 parts of transparent titanium dioxide fine particles, 20 portions of money base inorganic fungicides and 500 parts of water to form.And for example: in the acrylate paint that companies such as Cabot Corporation, Wacker-chemieGmbH provide, adopted the ultrafine powder of aerosil." Hybrid inorganic-organic UV-curable abrasin-resistant coatings " (Surf.Coat.Int.1998,81 (12) P594～595) introduced the nanometer colloid silicon-dioxide that adopts silane treatment, to improve the wear resistance and the hardness of acrylated urethano ultraviolet curing coating paint film; " nanometer SiO ₂Application in ultraviolet curing coating " (coatings industry 1999 (7) 3～5) then adopt and at a high speed grind the dispersive method with nanoparticle SiO ₂In being dispersed in acrylate paint, and to the curing speed of coating, launch research with aspects such as the hardness of the sticking power of base material, paint film, thermostabilitys.But it does not have antibacterial and antimildew function.JP10025435 has introduced a kind of weather resisteant antimicrobial coating, and parcel contains the sodium aluminate of Ag, Cu or Zn on silica gel, is sintered into crystal fine particle, is added in the ACRYLIC EMULSION again, forms the weather resisteant antimicrobial coating.But its complete processing complexity, and because of crystal fine particle does not reach nano level, so little with traditional coating difference.

Summary of the invention

The object of the invention just provides a kind of antimildew and antibacterial, washability, anti-marquis, water soluble green nanometer paint for external wall that alkaline resistance properties is strong.

Another object of the present invention just provides a kind of method for preparing antimildew and antibacterial, washability, anti-marquis, water soluble green nanometer paint for external wall that alkaline resistance properties is strong.

Task of the present invention is achieved in that a kind of nanometer paint for external wall, and basal component (mass parts) is:

(1) pure water 17～28

(2) wetting dispersing agent 0.42～0.95

(3) the nano-antibacterial powder 0.3～0.8

(4) nanometer SiO ₂3.14～4.73

(5) nano-titanium oxide 0.61～0.89

(6) film coalescence aid and softening agent 1.83～2.62

(7) anti-settling agent and frostproofer 1.4～2.6

(8) defoamer 0.05～0.16

(9) titanium dioxide 13～24

(10) filler 8～17

(11) emulsion 27～42

(12) thickening material and flow agent 0.46～0.83

Another task of the present invention is achieved in that

A. add pure water in container, start is stirred at a slow speed.Add after wetting dispersing agent and the nano-antibacterial powder high speed dispersion;

B. add film coalescence aid, softening agent, anti-settling agent and frostproofer, thickening material and flow agent at a slow speed successively, disperse;

C. add nanometer SiO at a slow speed successively ₂, nano-titanium oxide, high speed dispersion;

D. add titanium dioxide and filler at a slow speed, high speed dispersion is surveyed fineness;

E. add a small amount of defoamer and emulsion successively at a slow speed;

F. add flow agent and thickening material successively, regulate viscosity;

G. the scope with pH value is adjusted in 8～9 scopes, and backsight bubble what add appropriate amount of defoamer again, finished product.

Because the present invention adopted nano-powder in coating, its small-size effect, quantum effect, tunnel effect and surface effects have been improved the comprehensive physicochemical property of coating, have stronger uv-absorbing, infrared external reflection characteristic;

Adopted nanometer SiO ₂, be convenient in coating, form the three-dimensional silica stone structure, strengthen coating strength and sticking power;

Splendid weather resisteant, thermal ageing, not efflorescence was 15 years work-ing life;

Extremely strong opacifying power, acid and alkali-resistance, wash-resistant property;

Mildew-resistant, anti-algae, long acting antibiotic;

Paint film is plentiful, beautiful in colour, good decorative property, easy construction;

Building materials applicable to various different substrates.

The present invention is described in further detail below in conjunction with embodiment.

Embodiment

Embodiment one

A kind of nano-antibacterial powder and nanometer SiO of containing ₂Nanometer paint for external wall is applicable to architectural coatings such as concrete, sand-cement slurry, asbestos tiles.() pure water is started shooting and is stirred at a slow speed down together at first to add 17～28 mass parts in container.Add after 0.42～0.95 part of wetting dispersing agent and 0.3～0.8 part of nano-antibacterial powder high speed dispersion successively.Add film coalescence aid, softening agent, anti-settling agent and frostproofer, thickening material and flow agent more at a slow speed successively, disperse.The mass parts of film coalescence aid and softening agent is controlled at 1.83～2.62, and the mass parts of thickening material and flow agent is controlled at 0.46～0.83.If need to improve whiteness, then also can add 0.0002～0.06 ultramarine.Add nanometer SiO at a slow speed successively ₂And nano-titanium oxide, its corresponding mass parts is respectively 3.14～4.73 and 0.61～0.89, high speed dispersion.Add 13～24 parts of titanium dioxide and 8～17 parts of fillers at a slow speed, high speed dispersion is surveyed fineness.Add a small amount of defoamer and 27～42 parts of emulsions more successively at a slow speed.Add flow agent and thickening material successively, regulate viscosity, its mass parts is about 0.46～0.83.The scope of pH value is adjusted in 8～9 scopes, adds defoamer at last again, get finished product, the overall control of defoamer is in 0.05～0.16 mass parts.Product detects through Electronic Speculum, and excellent performance is as follows with the data contrast of traditional coating:

Interventions Requested	Traditional coating (GB acceptable end product)	The present invention
			Contrast ratio	≥0.90	≥0.94
Water tolerance (96 hours)	No abnormal	No change
			Alkali resistance (48 hours)	No abnormal	No change
Abrasion resistance, inferior	≥1,000	＞10,000
			Freeze-thaw resistance	Never degenerate	Never degenerate
Temperature-change resistance (10 circulations)	No abnormal	No change
			Artificial weathering	Efflorescence≤1 grade variable color in 250 hours≤2 grades	No variable color in 300 hours, 0 grade of 500 hours variable color≤2 grade
The paint film pendulum-rocker hardness		0.50
			The paint film structure		Tridimensional network

Embodiment two

A kind of outdoor textured paint that is applicable to the subtropical zone.The preparation method is with embodiment one, and its basal component (mass parts) is: pure water 20; Wetting dispersing agent 0.75; Nano-antibacterial powder 0.8; Nanometer SiO ₂4.73; Nano-titanium oxide 0.89.Can adopt the butyl ether that has film coalescence aid and softening agent function concurrently, also can adopt propylene glycol and TM-2 as film coalescence aid and softening agent respectively, but total mass part be about 1.4～1.6.Total mass part of anti-settling agent and frostproofer is controlled at 1.4, and use T-17 capable of being combined and butyl glycol ether also can use SN-619 separately.Defoamer 0.08; Ultramarine 0.008; Titanium dioxide 16; Filler 17; Flow agent and thickening material 0.52.Adopt the organosilicon crylic acid latex of 30～39 mass parts, effect is better.After tested, every excellent performance.

Claims (2)

1. nanometer paint for external wall is characterized in that basal component (mass parts) is:

(1) pure water 17～28

(2) wetting dispersing agent 0.42～0.95

(3) the nano-antibacterial powder 0.3～0.8

(4) nanometer SiO ₂3.14～4.73

(5) nano-titanium oxide 0.61～0.89

(6) film coalescence aid and softening agent 1.83～2.62

(7) anti-settling agent and frostproofer 1.4～2.6

(8) defoamer 0.05～0.16

(9) titanium dioxide 13～24

(10) filler 8～17

(11) emulsion 27～42

(12) thickening material and flow agent 0.46～0.83.

2. method for preparing the described nanometer paint for external wall of claim 1:

A. add pure water in container, start is stirred at a slow speed.Add after wetting dispersing agent and the nano-antibacterial powder high speed dispersion;

B. add film coalescence aid, softening agent, anti-settling agent and frostproofer, thickening material and flow agent at a slow speed successively, disperse;

C. add nanometer SiO at a slow speed successively ₂, nano-titanium oxide, high speed dispersion;

D. add titanium dioxide and filler at a slow speed successively, high speed dispersion is surveyed fineness;

E. add proper quantity of defoaming agent and emulsion successively at a slow speed;

F. add flow agent and thickening material, regulate viscosity;

G. the scope with pH value is adjusted in 8～9 scopes, and backsight bubble what add appropriate amount of defoamer again, finished product.