CN1317215C

CN1317215C - Process for mfg. self-cleaning antifog glass

Info

Publication number: CN1317215C
Application number: CNB2005100724447A
Authority: CN
Inventors: 潘俊明
Original assignee: HUNAN TAIXIN CERAMICS CO Ltd
Current assignee: HUNAN TAIXIN CERAMICS CO Ltd
Priority date: 2005-05-11
Filing date: 2005-05-11
Publication date: 2007-05-23
Anticipated expiration: 2025-05-11
Also published as: CN1693250A

Abstract

The present invention relates to self-clean antifogging glass which is formed by the way that butyl titanate, absolute alcohol and trolamine are as collosol preparing materials and are processed by a plurality of steps of collosol preparation, preprocessing glass sheets, drying a paint film, calcination, etc. The present invention is characterized in that after a semi-finished product is dried in a film coating mode, the film of the semi-finished product needs to be washed by an alcohol solution containing water and butyl alcohol, wherein the addition volume of the water and the addition volume of the butyl alcohol respectively account for 5 to 10% of the total amount of the alcohol solution, and the addition volume of alcohol accounts for 90 to 95% of the total amount of the alcohol solution. The self-clean antifogging glass formed according to the method has the advantages of even and transparent paint film and no color spot, and the light transmittance of the self-clean antifogging glass can reach 85 to 90%. Thereby, the light transmittance of the self-clean antifogging glass of the present invention is higher than that of the self-clean antifogging glass of the same type in the market at present by 70%.

Description

The manufacture method of self-cleaning antifog glass

Technical field

The present invention relates to a kind of manufacture method of self-cleaning antifog glass, refer in particular to employing with nano-TiO ₂Be major ingredient,, belong to glass surface and apply the membrane preparation method class with the method for sol method manufacturing glass with clean.

Background technology

Along with rapid economy development, the raising day by day of the raising of people's living standard and the scale of urbanization level of urbanization, the poly-fast of the high-grade curtain buildings thing in automobile, city public building, especially city increases, and the use of a large amount of daylighting ambettis all can be arranged in these facilities.Glass in daily use though can bring jewelly living environment to us, simultaneously also brings worry in the use to us: promptly how to solve the surperficial dirt and the atomizing problem that run in the use.

The Japan scientist finds TiO since the seventies in last century ₂Had since the photocatalysis characteristic, use TiO ₂For the photocatalyst material of representing has caused the extensive concern in the world to the obvious removal effect of each pollutent in the environment, be used to produce in the self-cleaning antifog glass technology in these several years.

According to the present application people the tracking of correlation technique is collected, generally adopt at present with TiO ₂Be the sol method self-cleaning antifog glass making method of raw material, its main manufacture craft is: the preparation of titanium colloidal sol, glass pre-treatment, the operations such as drying and sintering after filming, filming; Simultaneously, the TiO that has seen in the market ₂Self-cleaning antifog glass, its technical performance index is: have acidproof preferably, alkali resistance after soaking in 1M HCl and 1M NaOH; Transmittance is greater than 68%; Wear resistance is greater than 75 γ; Wetting angle＜3 °; Sterilizing rate is greater than 98%.

But, most of in the market TiO ₂Self-cleaning antifog glass owing to remaining unhydrolysed metatitanic acid lipid remnant in titanium colloidal sol, often the iris color spot occurs on the coated glass in the use, obviously reduces the transparency of glass thus, causes the reduction of product percent of pass.

Therefore, how effectively eliminating the iris color spot on the coated glass, improve the transparency and the aesthetic property of coated glass, has been the main solution problem that improves the coated glass qualification rate.

Summary of the invention

Purpose of the present invention: aim to provide a kind of can effectively the elimination and produce the iris color spot on the coated glass, can further improve the manufacture method of the self-cleaning antifog glass of product transparency and qualification rate.

This is that colloidal sol is made material with metatitanic acid fourth fat, dehydrated alcohol and trolamine, and the self-cleaning antifog glass of making by several operations such as colloidal sol preparation, sheet glass pre-treatment, dried coating film, calcinings, it is characterized in that: the intermediate behind dried coating film must be washed film with the ethanolic soln that contains deionized water and butanols; And described this ethanolic soln, wherein the volume that mixes of deionized water and butanols respectively is 5～10% of liquor capacity total amount, it is 90～80% of liquor capacity total amount that alcoholic acid mixes volume.

According to the self-cleaning antifog glass that above method is made, the homogeneous transparent of not only filming, no color spot, and its transmittance can reach 85～90% far above 70% transmittance of common similar self-cleaning antifog glass in the market, greatly improves product percent of pass.

Description of drawings

Accompanying drawing is a process flow sheet of the present invention.

Embodiment

The making method of this self-cleaning antifog glass as shown in the figure, the titanium colloidal sol that it adopted is made of jointly metatitanic acid fourth fat, ethanol, trolamine and deionized water, and in metatitanic acid fourth fat: ethanol: trolamine: go dried up=20: 75: 5: 1～3 ratio preparation.

When specifically preparing titanium colloidal sol, above-mentioned three kinds of chemical feedstockss should be put together and stir 1～2 hour, then to the deionized water that wherein adds by the amount of preparation requirement, and continue again to stir 0.5～1 hour, allow them reach abundant mixing state, and colloidal sol left standstill 8～24 hours, so far promptly finish the preparation that is suitable for titanium colloidal sol.

Described coated glass pre-treatment is promptly carried out pickling with the chemistry and the method for physics to required glass of filming and is soaked, then with ethanol and washed with de-ionized water totally and make it drying;

Described dried coating film is meant, above-mentioned glass is immersed in the titanium colloidal sol of having prepared, stops that the speed with 6cm/ minute proposes after 5 minutes, and is allowed to condition in 80～120 ℃ the environment dry 1 hour, is the elementary goods of coated glass at this moment;

The described membrane process of washing, soon filmed and the elementary goods of drying after handling, immerse washing in the coating solution of proposing among the present invention program, stopped for 1～10 second, then with 1～5mm/ speed lifting of second, still need be in 80～120 ℃ environment behind the drip-dry scavenging solution dry 1 hour, promptly obtain dry back coated glass no iris color spot, that qualification rate is higher; Just wash that used composition material deionized water, butanols and the ethanol of washing coating solution must be chemical pure level material in the membrane process at this, and must account for 5%-10% by deionized water, butanols 5%-10%, the ratio preparation of ethanol 90%-80%, at last above-mentioned coated glass is being put into calcining furnace, be allowed to condition under 400～600 ℃ of high temperature calcining 2 hours, the back of coming out of the stove final qualified product.

The ethanolic soln that usefulness the small amount of deionized water that the present invention proposes and a small amount of butanols are prepared is as scavenging solution, and coated glass is cleaned.Its mechanism is: by this cleaning glass is formed unnecessary, the remaining metatitanic acid fourth fat that is adsorbed on when filming on the film forming glass in coating process and can be dissolved in the above-mentioned scavenging solution, it is crucial containing amount of deionized water in the scavenging solution, the liposoluble of deionization hypervolia metatitanic acid fourth is separated too fast, the effect of filming can be not good, deionized water content is low excessively, and metatitanic acid fourth fat then can dissolve slow again; In order to make this cleaning be in the best, so the inventor adds the butanols with deionized water equivalent in deionized water.

In other words in the scavenging solution when deionized water is taken 5% volume, the butanols that matches with it is also taken 5% volume, this moment, the ethanol that will adopt then should be 90% volume; And deionized water, when butanols is taken 10% volume respectively, the ethanol that matches with it then should be 80% volume.The result that this cooperation is selected is: both can regulate the dissolution rate of metatitanic acid fourth fat, can guarantee that again this cleaning carries out in optimum range.

With this self-cleaning antifog glass that aforesaid method is made, the homogeneous transparent of filming, no color spot.Be coated with glass transmittance＞90% of a skim, be coated with transmittance＞88% of two tunics, be coated with transmittance＞85% of trilamellar membrane, be higher than the requirement of self-cleaning glass transmittance＞70% far away.

Self-cleaning antifog glass has well hydrophilic, lipophilicity, to wetting angle＜10 of water °, to wetting angle＜15 of oil (mixed oil) °.

Claims

1, a kind of manufacture method of self-cleaning antifog glass is characterized in that: the intermediate behind dried coating film must be washed film with the ethanolic soln that contains deionized water and butanols; And described this cleaning ethanolic soln, wherein the volume that mixes of deionized water and butanols respectively is 5～10% of liquor capacity total amount, it is 90～80% of liquor capacity total amount that alcoholic acid mixes volume.