JPH0455345A - Method and device for applying oily resin solution - Google Patents

Abstract

PURPOSE:To apply an oily resin soln. in uniform film thickness with high production efficiency and with loss of the soln. reduced by vertically raising a glass substrate line arranged in a specified manner, conveying the line and continuously applying the soln. CONSTITUTION:The square glass substrates with the equal sides opposed to one another are arranged on the same plane, the substrate line is vertically raised and conveyed, and an oily resin soln. is continuously applied. The soln. is obtained by dissolving an oily resin in an org. solvent. The resin is used as a binder, and various colorant, liq. crystal microcapsules or dispersant for the dispersoids, the antistatic or conductive agent and a curing agent, as required, can be incorporated. The viscosity of the paint is controlled to 0.5-500 cp at room temp. during the application. The drying is finished within one minute after application by adjusting the air quantity, temp., solvent, amt. of solvent and film thickness.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the application of an organic solvent solution containing a lipophilic resin, and more specifically to the application of a relatively quick-drying, low-viscosity organic solvent solution to a glass substrate. Concerning continuous application of.

[Prior art]

Dipping coating, roll coating, and spinner coating are used as methods for applying comparatively quick-drying, low-viscosity organic solvent resin solution to flat substrates such as glass, or improvements have been proposed (Jitsukaisho). No. 62-83573, JP-A-63-
No. 107769, etc.).

The most commonly used dipping coating method is a method in which the substrate is once immersed in a coating solution and then pulled up and coated at a predetermined speed, and the film thickness can be regulated with considerable precision by adjusting the viscosity and pulling speed. .

However, it is essentially difficult to coat one side or partially, and there are drawbacks such as the needless amount of coating liquid to be prepared.

In addition, the spinner method is a method in which a coating liquid is supplied onto a rotating substrate and the coating liquid is spread and spread to a uniform thickness using centrifugal force.It is essentially a discontinuous method, and about half of the coating liquid is outside the substrate. The disadvantage is that it is necessary to shake it off, resulting in too much loss of coating liquid.

In addition, the roll coating method is a method in which a part of the coating roll is immersed in the coating liquid, and the coating liquid is pulled up to a predetermined thickness on the surface by rotation of the coating roll, and the coating liquid is brought into contact with the glass substrate to supply the coating liquid. The coating is thinner at the top of the glass substrate and thicker at the rear, resulting in a lack of uniformity in film thickness.

However, the roll coating method described above has the possibility of continuous coating, and is considered to be a method worthy of attention from a production technology perspective.

Regarding hydrophilic gelatin solutions that undergo a sol-gel state change due to high temperatures, there is an example of an overflow coating method in which the coating liquid is flowed down over a coating knife and supplied to the substrate for horizontal continuous coating. There are no examples of continuous coating of fast-drying, low-viscosity organic solvent resin solutions that do not exhibit conditions.

On the other hand, with a process configuration that supplies, coats, and dries the coating liquid for each substrate, it is inevitable that production efficiency will be low.In addition, the conventional method suffers from a large loss of coating liquid and lacks coating uniformity, which is a major problem. It can be said that there is.

[Purpose of the invention]

An object of the present invention is to provide a coating method and apparatus that provides a uniform coating thickness, little liquid loss, and high production efficiency in coating an oil-based resin solvent solution onto a rectangular glass substrate.

[Structure of the invention]

The object of the present invention described above is (1) to continuously apply an oil-based resin solution while vertically raising and conveying a row of glass substrates arranged on the same plane with equal sides of square glass substrates facing each other. (2) A vertical continuous coating device for applying the oil-based resin solution onto a glass substrate, or an oil-based resin solution coating device comprising at least a glass substrate conveying device and a roll coating device.

The oil-based resin solution (hereinafter abbreviated as paint) used in the present invention is
A resin is dissolved in an organic solvent, and the resin is used as a binder for various coloring agents, dispersants for liquid crystal microcapsules or their dispersoids, antistatic or conductive agents,
A curing agent may be included if necessary.

The paint according to the present invention has a viscosity of 05 to 50 at room temperature at the time of application.
It is adjusted to 0 cp, preferably 10 to 50 cp.

Further, the drying speed can be adjusted so that the drying process is completed within 1 sin at the most after application by adjusting the air volume, temperature, solvent, amount of solvent, or film thickness.

The binder used in the present invention is a resin soluble in an organic solvent, but from the viewpoint of dispersion of the dispersoid, a resin modified by introducing a functional group or a functional group that forms an inner salt, such as a modified chloride resin, is used as the binder. Vinyl resin, modified polyurethane resin, or modified polyester resin is preferred.

Furthermore, conventionally used unmodified vinyl chloride resins, polyurethane resins, or polyester resins can be used in combination as necessary, and cellulose resins, phenoxy resins, thermosetting resins, reactive resins, Alternatively, a so-called photosensitive resin or the like that is sensitive to electromagnetic waves and used as a resist may be used.

Examples of the photosensitive resin include polymethyl methacrylate, chloromethylated polystyrene, polyethyl methacrylate,
Examples include polyfluorobutyl methacrylate, novolak resin, and other resins used as resist resins.

Next, as a coloring agent mixed into the binder liquid, benzidine yellow
ow) G (C, 1, 21090), Benzidine Yellow GR (C, 1, 21100), Permanent Yellow o
-(Permanent Yellow.

W) DIG (Hoechst product), Brilliant Carlne 6B (
C, 1,15850), Rhodamine 6G Lake (LaK
e) (C, 1,45160), Rhodamine B Lake (C
, 1,45170), Phthalonanine Blue Non-
Crystal (Phthalocyanine Blue)
non CrysLalNC, 1,74160), Phthalonanine Green (C, 1,74260), Carbon Black, Fan 1 (Pa) Yellow 5G, Fat Yellow 3G.

Fat Red G1 Fat Red 11 RR.

Fat Red 5B, Fat Black 11B1 Zapon First (2apon Pa5L) ・Black R [! .

Zapon First Black B1 Zapon First Blue II PL, Zapon First Red IIB, Zapon First Red GB1 Zapon First Yellow G1 Quinacridone Red F (C,
1,465,000), and these pigments are preferably contained in an amount of 1 to 50 parts by weight per 100 parts by weight of the binder resin.

The liquid crystal microcapsules are preferably selected from smectic, nematic, and cholesteric liquid crystals that can respond electrically or optically.

The content of these liquid crystals is 1 per 100 parts by weight of binder resin.
It is preferable to contain up to 50 parts by weight.

In order to improve the durability of the resin layer of the present invention, various curing agents can be contained in the coating material, and aromatic and aliphatic isocyanates and the like can be used.

Dispersants used in the present invention include phosphoric acid esters, amine compounds, alkyl sulfates, fatty acid amides, higher alcohols, polyethylene oxides, sulfosuccinic acids, sulfosuccinic esters, known surfactants, and salts thereof. , and also negative organic groups (e.g. -C00H)
It is also possible to use salts of polymeric dispersants having . These fractional agents may be used alone or in combination of two or more.

As antistatic agents or conductive agents, conductive powders such as tin oxide antimony oxide compounds, titanium oxide-silver oxide antimony oxide compounds; natural surfactants such as saponin; alkylene oxides, glycerin, glycidol, etc. Nonionic surfactants; Cationic surfactants such as higher alkylamines, quaternary ammonium salts, pyridine, other heterocycles, phosphoniums or sulfoniums; carboxylic acids, sulfonic acids, phosphoric acids, sulfuric acid ester groups, phosphoric ester groups Examples include anionic surfactants containing acidic groups such as; amphoteric surfactants such as sulfuric acid or phosphoric acid esters of amino acids, aminosulfonic acids, and amino alcohols;

Solvents to be added to the paint or diluting solvents during application of this paint include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as methanol, ethanol, propatool, and butanol; methyl acetate; ethyl acetate, butyl acetate,
Esters such as ethyl lactate and ethylene glycol monoacetate; Ethers such as glycol dimethyl ether, glycol monoethyl ether, dioxane, and tetrahydrofuran; Aromatic hydrocarbons such as benzene, toluene, and xylene; Methylene chloride, ethylene chloride, carbon tetrachloride, Halogenated hydrocarbons such as chloroform and dichlorobenzene can be used.

Further, as the glass substrate, quartz glass, ship glass, chemically strengthened glass, borosilicate glass, etc. can be selected and used in accordance with optical, chemical, or electrical requirements.

The thickness of these substrates is 0.1 to 5 m, preferably 0.1 m to 5 m.
5 to 2 IIIl.

An intermediate layer for improving adhesiveness may be provided between the base and the resin layer.

In the present invention, the thickness of the resin layer provided on the glass substrate is
Although it is optimally selected depending on the form of use, the dry thickness is preferably 0.1 to 20 .mu.I, preferably 0.1 to 5 .mu.I in terms of coating.

Further, depending on the application, a functional layer such as a transparent conductive layer may be added in addition to the resin layer according to the present invention.

Next, the coating method of the present invention will be explained with reference to the drawings.

In Fig. 1, 1 is a roll coating device, 11 is a paint tank, 12 is a paint pick-up roll partially immersed in the paint, 13 is a coating roll that contacts the substrate and supplies the paint to the substrate, and 13° is a coating roll. It is a nip roll that is paired with. Also, 2 is paint. The roll surface of the paint roll 13 is made of soft rubber or a gravure shell surface.

3 is a conveying device, which consists of a pair of conveying rolls 34 (i=1, 2, . . . n) or an endless belt 3L 31' for holding the substrate on the same conveying vertical plane P (FIG. 2).
. 4 is a rectangular glass substrate. The substrates 4 to be transported may have their equilateral sides aligned closely, or may be spaced apart at appropriate intervals.

Reference numeral 5 denotes a means for supplying substrates to the conveying device, which separates the substrates one by one from the nitrous-containing substrates arranged side by side or stacked, aligns the substrates with the cutting surface P of the conveying device, and supplies them.

6 is a means for drying and carrying out the coated substrate.

In the present invention, the coating speed of the paint with controlled drying rate and viscosity is 0.1 to 611/win, preferably 03 to 1
．． 5m/win.

According to the aspect of the present invention, a necessary and sufficient production efficiency can be obtained arbitrarily, and by vertically standing up, a difference in film thickness at the beginning and end of the coated substrate is generated due to the gravitational effect due to the interaction between surface tension and dryness. Never.

〔Example〕

A paint having the following composition was prepared and applied to a glass substrate 10e according to the embodiment of the present invention, and the occurrence of uneven coating and liquid loss rate were checked. Carbon black was used as a pigment to check for coating unevenness.

il + glass substrate borosilicate glass, thickness 1 mm, 30x 30cof (
2) Paint composition Weight parts Sulfo-modified PVC resin 12 Polyurethane resin 6 Cyclohexanone
150 methyl ethyl ketone
100 toluene
100 carbon black 7
Stearic acid 1-butyl stearate 1 (3) Coating speed 0.5.1.0.1.5.2.0 m/ein (4) Drying conditions 60°C, air flow LOrrr/win Sample obtained as above As a result of visual judgment of coating unevenness, all were found to be usable for practical use.

In addition, the liquid loss ratio between the amount of coating liquid and the remaining liquid in the coating tank was only 5%.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a roll coating apparatus to which the method of the present invention is applied. Further, FIG. 2 is a diagram showing a conveying device using an endless belt. 1... Roll coating device 11... Paint tank, 12... Pick-up roll 13
...Applying roll, 13°...Nip roll 2...
Paint, 3...Transport device 31...Transport roll pair 31 and 31'...Endless belt 4...Glass substrate 5...Substrate supply means, 6...Drying/unloading means.

Claims (2)

[Claims] (1) A coating method characterized by continuously applying an oil-based resin solution while vertically raising and transporting a row of glass substrates arranged on the same plane with equal sides of square glass substrates facing each other. (2) An oil-based resin solution coating device, wherein the vertical continuous coating device for applying the oil-based resin solution onto a glass substrate includes at least a glass substrate conveying device and a roll coating device.