CN1485382A

CN1485382A - Antibacterial purifying nano coating for interior wall

Info

Publication number: CN1485382A
Application number: CNA011273836A
Authority: CN
Inventors: 刘永屏
Original assignee: Qingdao Yiqun New Type Coating Material Co ltd
Current assignee: Qingdao Yiqun New Type Coating Material Co ltd
Priority date: 2001-09-04
Filing date: 2001-09-04
Publication date: 2004-03-31

Abstract

The invention provides a nano interior wall coating with strong antibacterial and purifying capabilities and a preparation method thereof, wherein the nano interior wall coating comprises 15-22 mass parts of pure water, 2-5 mass parts of ethylene glycol, 4-10 mass parts of kaolin, 8-15 mass parts of light calcium carbonate, 5-8 mass parts of aluminum silicate, 3-6 mass parts of talcum powder, 6-20 mass parts of lithopone, 15-19 mass parts of acrylic emulsion, 1.5-3 mass parts of nano titanium dioxide, a dispersing agent, a defoaming agent, a film-forming auxiliary agent, a thickening agent, a flatting agent and the like. The preparation method mainly overcomes the agglomeration of the nano material, enhances the dispersion effect and gives full play to the properties of the nano material.

Description

Antibacterial purifying nano paint for internal walls

Technical field

The present invention relates to a kind of building coating and preparation method thereof, particularly a kind of interior wall nano paint and preparation method with antibacterial purifying function.

Background technology

Traditional building coating because contain toxic substance or easily stain, easily go mouldy, adhesion strength and ageing resistance be relatively poor, incompatibility is in the world to requirement on environmental protection.In recent years, the coating material to superior performance has carried out extensive studies and exploration both at home and abroad, and wherein nano paint is an important research direction.China is owing to the theoretical investigation of nanotechnology is taken its place in the front ranks of the world, its applied research, comprise nano paint, many gratifying achievements have also been obtained, as Chinese patent CN1287144A, CN1287145A provide contain nano silicon-based oxide in, exterior coating and preparation method, Chinese patent CN1277234A provides a kind of oxygen debt silicon-base oxide has been inserted existing coating to improve the method for performance, but in general, the development of nano paint also is in initial stage, performance index can't be satisfied the demand, and with regard to interior wall coating, the antibacterial purifying ability is not high, scope is extensive inadequately, and regenerative power is restricted.Therefore, no matter be composition proportion or technology, all await further optimizing and improving.

Summary of the invention

The purpose of this invention is to provide a kind of interior wall nano paint with strong antibacterial purifying ability.

Another object of the present invention provides the method that a kind of preparation has the interior wall nano paint of aforementioned capabilities.

The objective of the invention is to be achieved through the following technical solutions: a kind of interior wall nano paint with antibacterial purifying ability, its essentially consist comprises following composition (mass component):

(1) pure water 15-22

(2) ethylene glycol 2-5

(3) wetting dispersing agent 0.6-2

(4) defoamer 0.1-0.3

(5) titanium dioxide 3-5

(6) kaolin 4-10

(7) fine particle calcium carbonate 8-15

(8) pure aluminium silicate 5-8

(9) talcum powder 3-6

(10) zinc sulfide white 6-20

(11) Nano titanium dioxide 1.5-3

(12) ACRYLIC EMULSION 15-19

(13) film coalescence aid 0.6-1.6

(14) thickening material 0.3-1

(15) flow agent 0.1-0.5

(16) mould inhibitor 0.1-0.5

Another object of the present invention is achieved through the following technical solutions: a kind of preparation has the method for the nano paint of antibacterial purifying ability, may further comprise the steps;

A, (1) with in the mentioned component, (2), (3), (4), (5), (6), (7), (8), (9), (10), (11) are put in the high speed dispersor that rotating speed is 1500-2000rpm, and jitter time is 40-60 minute;

B, will grind by shredder through the product that steps A obtains;

C, the product that obtains after will grinding add stirrer, slowly add (12), (13), (14), (15), (16) in the mentioned component under the stirring velocity of 200-400rpm, mix;

D, will sieve, get product through the product that step C obtains.

Said Nano titanium dioxide is to coat the meal that obtains through ultra-sonic dispersion and surface in the technique scheme.

In the technique scheme, owing to contain Nano titanium dioxide in its component, this material is a kind of n N-type semiconductorN material, its energy gap has only 3.2Ev, and under photocatalysis, the electronics on its valence band can transit to conduction band easily, form hole-electron pair, water vapor and oxygen and both hole and electron are had an effect, and final the generation has high chemically active hydroxyl radical free radical, and this free radical can be dispeled airborne formaldehyde, NO _x, SO ₂Deng toxic gas and make organic substance degraded, can bacterium be killed the bacterial cell film destroy that contacts with it, thereby play anti-microbial effect.

Coating with antibacterial purifying ability provided by the present invention has the following advantages: one, the scope of purifying contaminated thing is wide, to the formaldehyde in the environment, NO _x, SO ₂And the obnoxious flavour that distributes of indoor building materials, furniture and electrical equipment and organism and bacterium, mould etc. can effectively eliminate or kill, and has ecological significance; Two, action condition is simple, as long as sunlight or houselights are arranged, nano material can be by catalysis, the effect of performance antibacterial purifying; Three, stronger regenerative power is arranged, at normal temperatures and pressures, use water wash, the product drip washing that oxidation generates is fallen, can recover active.

Embodiment

One embodiment of the present of invention are:

With 18 parts of (mass parts, water down together), 3 parts of ethylene glycol, 0.6 the Ricinate of part, 0.15 the defoamer of part, 20 parts of zinc sulfide white, 6 parts of titanium dioxide, 4 parts of kaolin, 8 parts of fine particle calcium carbonates, 3 parts of pure aluminium silicate, 4 fens talcum powder and 1.8 parts of Nano titanium dioxides and 0.2 part of mould inhibitor are put into the high speed dispersor that rotating speed is 2000rpm, jitter time is 40 minutes, then product is put into shredder, mesh-of-grind is 50 μ m, then product is put into stirrer, under the stirring of 300rpm, slowly add 16 parts of ACRYLIC EMULSION, 1 part of film coalescence aid, 0.5 part thickening material, 0.2 part flow agent and 0.15 part of defoamer, after mixing, cross 120 mesh sieves at last, promptly obtain finished product.

Said Nano titanium dioxide is that nano titanium oxide coats the meal that obtains through ultra-sonic dispersion and surface in the foregoing description, and the particle diameter of nano material is the 20-40 nanometer.After disperseing, reach ratio 〉=98% of progenitor.

The coating with antibacterial purifying ability that embodiment obtains is checked through chemical engineering institute of Beijing University of Chemical Technology, the method of inspection is with reference to country " sterilized product is identified and inspection specifications ", experimental strain is subtilis, intestinal bacteria, streptococcus aureus and Candida albicans, test in 1 hour after being coated with, the result is as shown in the table:

Sample gemma escherichia coli and staphylococcus aureus Candida albicans

Killing rate (%) 84＞85＞90＞85

Claims

1, a kind of antibacterial purifying interior wall nano paint is characterized in that essentially consist comprises following composition (mass component):

(1) pure water 15-22

(2) ethylene glycol 2-5

(3) wetting dispersing agent 0.6-2

(4) defoamer 0.1-0.3

(5) titanium dioxide 3-5

(6) kaolin 4-10

(7) fine particle calcium carbonate 8-15

(8) pure aluminium silicate 5-8

(9) talcum powder 3-6

(10) zinc sulfide white 6-20

(11) Nano titanium dioxide 1.5-3

(12) ACRYLIC EMULSION 15-19

(13) film coalescence aid 0.6-1.6

(14) thickening material 0.3-1

(15) flow agent 0.1-0.5

(16) mould inhibitor 0.1-0.5

2, a kind of method for preparing the described antibacterial purifying interior wall of claim 1 nano paint may further comprise the steps:

A. (1) in the mentioned component, (2), (3), (4), (5), (6), (7), (8), (9), (10), (11) are put in the high speed dispersor that rotating speed is 1500-2000rpm, jitter time is 40-60 minute;

B. will grind by shredder through the product that steps A obtains;

C. the product that will obtain after will grinding is put into stirrer, slowly adds (12), (13), (14), (15), (16) in the above-mentioned composition under the stirring velocity of 200-400rpm, mixes;

D. will sieve through the product that step C obtains, get product.

3, antibacterial purifying nano paint according to claim 1 is characterized in that said Nano titanium dioxide is that nano titanium oxide coats the meal that obtains through ultra-sonic dispersion and surface, and the particle diameter of nano material is the 20-40 nanometer.