CN101104780A - Masking tape for board - Google Patents

Abstract

The present invention provides a shield adhesive tape, which prevents the shape of film (coating) around the shield adhesive tape from non anticipant expansion which brings on non anticipant accretion of the film (coating), when besmearing the coating liquid containing fluid material on a substrate to form film. The shield adhesive tape (10) is characterized in that it is arranged with a substrate (1) and an adhesive layer (3) forming on one surface of the substrate (1), the contact angle of the other surface (A) of the substrate (1) is below to 65 degrees and that of the profile (B) of the adhesive layer (3) is below to 100 degrees. When forming film (coating) of fluid material such as water dispersion conductive material, the present invention prevents the meniscus surface from forming on the adhesive layer (3), and prevents the fluid material on the other surface (A) of the substrate (1) from falling off, so as to form film with uniform film thickness.

Description

Masking tape for board

Technical field

The present invention relates to masking tape for board, in more detail, relate at substrate for organic el, liquid crystal and be coated with the masking tape for board that free-flowing materials such as organic EL Material, conductive material, photo-resist use when forming film on various substrates such as substrates with substrate, semiconductor crystal wafer, CD with substrate, organic film substrate for solar cell, plasma display.

Background technology

ORGANIC ELECTROLUMINESCENCE DISPLAYS (OELD) can realize visual good, slim, light weight, low power consumption and low cost because of self luminous high briliancy, wide viewing angle, high-speed responsive etc., so is considered to the most strong indicating meter of future generation.Organic ELD generally has on the glass substrate structure of lamination anode (transparency electrode), HTL (hole transporting layer), EML (luminescent layer), ETL (electron supplying layer) and negative electrode in turn, extensively utilize film formations technology when forming each layer, described film formation technology is for example known ink jet method.

Ink jet method is for example will contain luminescence polymer (R, G, B) coating fluid freely sprays by switch from nozzle, divide the method on each pixel on the substrate that is coated in, but exist the drop size inhomogeneous easily, restrict the solids component ratio and the viscosity of used coating fluid, and the problem that also can midway interrupt of drop itself.In addition, the drying of spray nozzle front end causes that easily jet hole stops up, and also has problems on maintainability.

In recent years, spray coating fluid continuously and film forming nozzle coating method receives much concern from nozzle.The nozzle coating method be be filled in the bottle in a coating fluid suck out filtration with assemble pump after, be transported to the hydrojet nozzle, form fluid column from nozzle, and be ejected on the substrate continuously, therefore there are not the problems referred to above in the ink jet method, have the common advantage (spy opens the 2004-89771 communique) that can spray coating fluid with essentially identical flow.

But continuously to the method for the coating coating fluid of substrate ejection coating fluid, the responsiveness of control coating fluid ejection is not high, so be difficult to control with switch the ejection of coating fluid with nozzle.Therefore, be difficult to, so the zone that can't only select to be coated with in scanning applies coating fluid in the ejection of using the coating fluid of on-off control on substrate between the scan nozzle.Therefore, carrying out nozzle when coating, the zone that does not need on the substrate to be coated with has also been applied coating fluid after, must remove and be coated on the coating fluid that does not need on the dispensing area.For example, the end in the four directions at four of substrate angles is not need the zone that is coated with.When carrying out the nozzle coating, remove the method for coating fluid as the dispensing area that do not need from substrate, the method that masking tape or shading member cover does not need dispensing area of utilizing is arranged.In addition, when utilizing the nozzle coating method from many display panels of a substrate manufacture, owing between the display panel of adjacency and display panel, also spray coating fluid, thereby can not divide between the display panel that is coated in adjacency.

The inventor sprays free-flowing material by the nozzle coating method to glass substrate in research, attach known in the past masking tape in the zone that does not need to be coated with, when making the method that not applied liquid is coated between the display panel of adjacency, suffer from each display panel near the sidepiece (side) of the thickness of the film that coating fluid that (should film forming zone) form causes, cause the problem of thickening because of being coated with expansion that shape do not expect at masking tape.The expansion of not expecting of the coating shape of this free-flowing material causes the thickness of not expecting of film to increase in case produce, afterwards, for example in display panel the go-and-retum evaporation negative electrode of (should film forming zone) with material after, just might produce the partial disconnection of negative electrode, maybe can not stop outside moisture and the such bad phenomenon of oxygen by the negative electrode that evaporation forms in the coating shape expansion of the film of above-mentioned free-flowing material formation.

Summary of the invention

In view of the foregoing, the problem that the present invention will solve provides a kind of masking tape, after it covers the zone that does not need on the substrate to be coated with masking tape, the coating coating fluid that contains free-flowing material to be when forming film again, can prevent that film (filming) around adhesive tape from producing the thickness of not expecting and increasing.

The inventor etc. are in order to solve above-mentioned problem, when having studied the known in the past masking tape of relevant use, the cause of increased of the thickness of not expecting that the film that contains free-flowing material (filming) around the masking tape causes, when forming film with nozzle coating method ejection free-flowing material, following phenomenon can appear as can be known.

[1] the lateral free-flowing material attached to masking tape forms the crescent moon surface.

[2] free-flowing material that is coated on the masking tape back side forms emaciated face at the film of masking tape sidepiece and falls.

So, the inventor etc. are on the basis of described cognition, from improving the result that viewpoint that masking tape and film form wet the moistening property of material (free-flowing material) is studied, when finding that contact angle when the water on the masking tape back side (the non-formation face of the bonding coat of base material) and masking tape side (side of bonding coat) is respectively at specified range, can suppress above-mentioned [1], and eliminate above-mentioned [2], and can suppress the increase of the thickness of not expecting in the film (filming) that forms by free-flowing material around the masking tape, so far finished the present invention.

That is, the present invention relates to as follows:

(1) masking tape for board is the masking tape for board that has bonding coat on a face of base material, and wherein, the contact angle of the water on another face of base material is less than 65 °, and the contact angle of the water on the side of bonding coat is less than 100 °.

(2) above-mentioned (1) described masking tape, wherein, bonding coat by bonding plane on have spacer.

(3) above-mentioned (1) or (2) described masking tape, wherein, base material comprises ployester series film.

(4) each described masking tape in above-mentioned (1)～(3) wherein, has surface-treated layer on another face of base material.

(5) each described masking tape in above-mentioned (1)～(4), wherein, the side of bonding coat has surface-treated layer.

(6) above-mentioned (5) described masking tape, wherein, surface-treated layer is coated with photocatalyst.

(7) each described masking tape in above-mentioned (1)～(6), wherein, substrate is a glass substrate.

(8) each described masking tape in above-mentioned (1)～(7), wherein, substrate is organic EL substrate.

(9) each described masking tape in above-mentioned (1)～(8) uses when the coating method of base plate coating free-flowing material forms film from nozzle in utilization.

Among the present invention, " free-flowing material " is meant the material of forms such as liquid, semiliquid, paste, melt, solution, dispersion liquid or suspension, be can utilize nozzle to pass through continuously coating and on substrate film forming material.

Masking tape for board of the present invention, the contact angle of the lateral water of its back side (the non-formation face of the bonding coat of base material) and bonding coat is respectively in specific scope, show specific wet moistening property, therefore after it being attached to the zone that not needing on the substrate apply (should film forming zone), when being coated with free-flowing material again with the formation film, the height on the crescent moon surface of the free-flowing material that near the sidepiece (side) of adhesive tape forms is diminished, and, the free-flowing material that can suppress to be coated on the adhesive tape back side comes off to the adhesive tape sidepiece, makes on the substrate (non-shaded areas) stably to form film and can not produce the thickness of not expecting and increase and become possibility.Therefore, for example, on substrate for organic el, attach masking tape for board of the present invention, on this substrate, divide and a plurality ofly should film forming zone (display panel zone) form film in turn as each functional layer with the nozzle coating method, even if making the process of many display panels (organic ELD) from a substrate, can prevent positively also that the conduction that negative electrode broken string causes is bad, in the negative electrode to the bad phenomenon such as unfavorable that stop of the moisture of outside and oxygen, its result, can enhance productivity, significantly cut down production cost.

Description of drawings

Fig. 1 is the skeleton view of an embodiment of expression masking tape for board of the present invention.

Fig. 2 is the sectional view of an embodiment of expression masking tape for board of the present invention.Fig. 2 (a) is the sectional view of an embodiment of expression masking tape for board of the present invention, and Fig. 2 (b) is the sectional view that other embodiments of masking tape for board of the present invention relate to.

Fig. 3 is the figure of lateral wet the moistening property test of explanation masking tape, and Fig. 3 (a) attaches masking tape, drips the water dispersible electro-conductive material, places 24 hours state graph.Fig. 3 (b) places after 24 hours the state graph of peeling off masking tape.

The following key element of symbolic representation in the accompanying drawing.

1... base material, 3... bonding coat, 5... spacer, 10... masking tape for board, 20... masking tape for board

Embodiment

Below, explain the present invention by preferred implementation.Illustrated that in description of drawings, same key element is given prosign, the repetitive description thereof will be omitted.In addition, in order to illustrate facility, dimensional ratios on the drawing and explanation not necessarily in full accord.

(the 1st embodiment)

Fig. 1 is the skeleton view of the masking tape for board of the 1st embodiment, and Fig. 2 (a) is the sectional view that the I-I line of the masking tape for board that relates to along the 1st embodiment is done.

Masking tape for board of the present invention shown in the masking tape for board 10 of the 1st embodiment, the bonding coat 3 that has base material 1 and form at face of this base material 1.Bonding coat 3 itself has binding property, is made of tackiness agent described later.It is characterized in that another face A of base material 1, promptly the contact angle of the water on the back side of this masking tape 10 is less than 65 °, and the contact angle of the water on the side B of bonding coat is less than 100 °.

Below, each integrant of masking tape for board is elaborated, masking tape for board simply is called masking tape.

(base material)

Base material 1 so long as the contact angle of the water on another face of base material can use less than 65 ° (preferably less than 60 °, be more preferably less than 50 °) and be not particularly limited.Described contact angle is more than 65 ° the time, when forming film, wet the moistening property at the masking tape back side becomes insufficient, and free-flowing material comes off from the masking tape back side easily, when free-flowing material comes off at the masking tape sidepiece, become the thickness cause of increased that film is not expected.In addition, also can become the reason that particulate, bespatter, pollutant etc. pollute.

Illustrated that the lower limit of the contact angle of the water on another face of base material does not have particular determination, preferred more than 5 °, more preferably more than 10 °.

In this specification sheets, " contact angle of water " is meant that the glass syringe with the stainless steel pin that internal diameter 0.4mm is housed makes the distilled water of 3 μ g attached on the tested surface, adhering in back 20 seconds, under 23 ℃ * 50%RH, adopt contact angle meter (trade(brand)name: CA-X type; Consonance interface science (strain) system), with the value that θ/2 methods determine.Its value is less than 65 ° base material when in the present invention, selecting the contact angle of measuring water as mentioned above for use.

As base material, for example preferably use plastics film, specifically, can enumerate polyolefin films such as polyethylene, polypropylene; Ployester series film such as polyethylene terephthalate, polybutylene terephthalate; Polyamide-based film such as nylon, triacetylcellulose film, Kapton etc.Wherein, consider that from viewpoints such as solvent resistance, water tolerance preferred polyester is a film.Particularly ployester series film reaches the contact angle of water easily less than above-mentioned scope.In addition, consider preferred Kapton from stable on heating viewpoint.That is, when base material uses Kapton, for example, preferably can will for example heat-treat (baking) under the temperature about 250 ℃ at the substrate that directly attaches masking tape on the substrate.Illustrated that these plastics films are that no extension film and extension (unidirectional extension or two-way extension) film all can.In addition, these plastics films need not through special surface treatment, and can directly use the contact angle of water of film surface less than 65 ° film according to the characteristic of material (plastics), but film if not so, for the contact angle of water that reaches the surface less than 65 °, will carry out the surface treatment (surface-treated layer is set) of hydrophilization to face as the film of another face of base material.In addition, according to the characteristic difference of material (plastics),, make the contact angle of water littler even the contact angle of the water of film surface less than 65 ° film, also can carry out surface treatment.Described surface treatment for hydrophilization can be enumerated antistatic treatment, plasma treatment, corona treatment, easy adhesion process etc.

Bury at above-mentioned antistatic treatment, corona place and easy adhesion process can be adopted use in method well known in the art, antistatic treatment for example can be enumerated and adopt polyvinyl alcohol, polyester, acrylic acid polymer, urethane etc. to form the processing etc. of metal oxide film as processing, evaporation metal oxide compound or the ITO methods such as (tin indium oxides) etc. of the coating surface promoting agent of tackiness agent, and easily adhesion process for example can be enumerated pva coating, polyester, acrylic acid polymer, urethane etc.

Illustrated, as the base material of the contact angle with water less than 65 ° surface, for example commercially available T100N38, T100C38 (above is trade(brand)name, Mitsubishi Chemical's polyester (strain) system).

In addition, for a face (bonding coat is formed face) of base material,, also can carry out surface treatment in order to improve binding property with bonding coat etc.Surface treatment can be enumerated corona treatment, easy adhesion process, antistatic treatment etc.Illustrated that described corona treatment, easy adhesion process and antistatic treatment can adopt in method well known in the art.The thickness of base material is generally 1O～300 μ m, considers from viewpoints such as flexibilities, is preferably 20～100 μ m, 25～50 μ m more preferably.

(bonding coat)

As forming the used tackiness agent of bonding coat, contact angle removable, that can make the water on the bonding coat side is less than the tackiness agent of 100 ° (preferably less than 90 °, be more preferably less than 80 °) when selecting to form bonding coat.When described contact angle more than 100 ° the time, become insufficient in the side of masking tape and wet the moistening property of film formation material, the height that the film that near the sidepiece of adhesive tape (side) forms forms the crescent moon surface of material can not diminish, the thickness of film is different with desired state with the coating shape.In addition, when the contact angle of water is too small, for example, when coating fluid is coated with linear, when the pattern of coating fluid adjacency was connected, coating fluid was at adhesive tape sidepiece stretching transition, and the thickness that therefore is easy to generate film becomes the state such bad phenomenon different with desired state, consider that from the viewpoint of eliminating described bad phenomenon the contact angle expectation of water is (preferred more than 15 °, more preferably more than 20 °) more than 10 °.

Illustrated, because the thin thickness of bonding coat, therefore be not easy directly to measure the contact angle of the lateral water of bonding coat, because being made of same material by bonding plane and side of bonding coat, the contact angle by the water on bonding plane and the side that therefore can infer bonding coat is identical.Therefore, among the present invention, with bonding coat by the contact angle of the water on bonding plane regulation contact angle as the water on the side of bonding coat.

It is tackiness agent, acrylic adhesive that described tackiness agent preferably uses polyester.As polyester is tackiness agent, preferably should improve wet moistening property, contain that (hydroxyl value is preferably 35～130KOHmg/g, more preferably 45～120KOHmg/g) and be selected from the polyester that the diprotic acid in sebacic acid, hexanodioic acid, nonane diacid and the phthalic acid obtains by being selected from diol compound in polycarbonate diol, the polycaprolactone glycol etc.

In addition, can use preferably also that to have the side chain that contains alkyl and number-average molecular weight be polyester more than 5000.At this moment, as the proportional particular restriction that do not have that contains of the group that contains alkyl of side chain, can suitably select according to various characteristicses such as binding property, flexibility, thermotolerance and mechanical characteristicies.Polyester can be used singly or two or more kinds in combination.

The group that contains alkyl (yet claiming " containing hydrocarbyl group " sometimes) as side chain does not just have particular restriction so long as contain the group of alkyl.Therefore, as the group that contains alkyl, both can be the group that only constitutes by alkyl, also can be alkyl bonded form by the divalent organic group contain hydrocarbyl group (for example alkyl-oxygen base, alkyl-oxygen carbonyl etc.).As containing hydrocarbyl group, can preferably use the group (being alkyl) that only constitutes by alkyl.Polyester normally has a plurality of hydrocarbyl groups that contain in molecule.A plurality of hydrocarbyl groups that contain like this can only use a kind of group, also can use the group more than 2 kinds.

Above-mentioned alkyl can be any of aromatic hydrocarbyls such as ester ring type alkyl such as aliphatic alkyls such as alkyl, cycloalkyl (for example cyclohexyl etc.), aryl (for example phenyl or naphthyl etc.), but is preferably aliphatic alkyl.Aliphatic alkyl can preferably use alkyl.Alkyl for example can be enumerated the alkyl of carbon numbers 1～20 such as methyl, ethyl, propyl group, sec.-propyl, butyl, isobutyl-, sec-butyl, the tertiary butyl, amyl group, hexyl, heptyl, octyl group, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl.

Illustrated, for the second-order transition temperature (Tg) that makes polyester or its crosslinking structural body below-10 ℃, preferably-20 ℃ (reaching-100 ℃ usually), and/or in order to obtain the transparent and liquid polyester under 23 ℃, it is proportional suitably to select to contain containing of hydrocarbyl group.

The lower limit of the number-average molecular weight of polyester for example is 5000, preferred 10000, more preferably 11000, further preferred 12000, preferred especially 20000, the upper limit for example is 90000, preferred 80000, more preferably 70000, further preferred 60000.The number-average molecular weight of polyester is 5000 when above, and perhaps the physical strength as tackiness agent is difficult for descending, and perhaps repeats workability, thermotolerance is difficult for descending.On the other hand, the number-average molecular weight of polyester is below 90000, in particular for 80000 when following, than being easier to form adhesive sheet.In addition, the lower limit of the dispersity of polyester (weight average molecule number/number-average molecular weight) is generally 0.5, preferred 1, and the upper limit is generally 25, preferred 14, more preferably 13.At this, number-average molecular weight is measured and is got by GPC (gel permeation chromatography).

Polyester is by the esterification of polyhydroxy reactant that has the hydrocarbon side chain radical in the folk prescription composition at least and polycarboxylic acid composition and get.Polyhydroxy reactant and polycarboxylic acid composition can be used singly or two or more kinds in combination.

Have the polyhydroxy reactant that contains hydrocarbyl group and for example can enumerate neopentyl glycol, 2-methyl isophthalic acid, ammediol, 2,2-diethyl-1, ammediol, 2-methyl-2-propyl group-1, ammediol, 2-butyl-2-ethyl-1, ammediol, 3-methyl isophthalic acid, the 5-pentanediol, 2-methyl-2,4-pentanediol, 2,4-diethyl-1,5-pentanediol, 1,3,5-trimethylammonium-1, the 3-pentanediol, the 2-methyl isophthalic acid, 6-hexylene glycol, 2-methyl isophthalic acid, 8-ethohexadiol, 2-methyl isophthalic acid, 9-nonanediol, dimer diol, 2-methyl isophthalic acid, 4-cyclohexanediol etc. have diol component that contains hydrocarbyl group etc.

Have the polycarboxylic acid composition that contains hydrocarbyl group and for example can enumerate methylsuccinic acid, ethyl succsinic acid, 2,2-dimethyl hexanodioic acid, 2,3-dimethyl hexanodioic acid, 2,4-dimethyl hexanodioic acid, 3,3-dimethyl hexanodioic acid, dimeracid, 2-methyl isophthalic acid, 4-cyclohexane dicarboxylic acid, 2-ethyl-1,4-cyclohexane dicarboxylic acid etc. have the dicarboxylic acid that contains hydrocarbyl group and become to grade.In addition, have the polycarboxylic acid composition that contains hydrocarbyl group and also can use polycarboxylic acid derivatives such as acid anhydrides that these polycarboxylic acids produce or lower alkyl esters.

Illustrated, at this moment, importantly (for example, the second-order transition temperature of polyester or its crosslinking structural body can be adjusted to-below 10 ℃ scope) uses other polyhydroxy reactant or other polycarboxylic acid composition in scopes such as the heat-resistant quality that can keep polyester, binding property.

Other polyhydroxy reactant for example can be enumerated: ethylene glycol, 1, ammediol, 1,4-butyleneglycol, 1,5-pentanediol, 1,6-hexylene glycol, 1,8-ethohexadiol, 1,9-nonanediol, 1,10-decanediol, 1, straight catenate aliphatic diol composition such as 18-octadecandiol, or 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1, alicyclic diols such as 4-cyclohexanediol become to grade.

Other polycarboxylic acid composition for example can be enumerated, succsinic acid, hexanodioic acid, nonane diacid, sebacic acid, 1,12-dodecylic acid, 1, aliphatic dicarboxylic acid compositions such as 14-tetradecane diacid, or 1,2-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, 1, alicyclic dicarboxylic acid's compositions such as 4-cyclohexane dicarboxylic acid, or phthalic acid, m-phthalic acid, terephthalic acid, 1, the 4-naphthalene dicarboxylic acids, 4 ', aromatic dicarboxylic acids such as 4-diphenyl dicarboxylic acid become to grade.In addition, as other polycarboxylic acid composition, also can use polycarboxylic acid derivatives such as acid anhydrides that these polycarboxylic acids produce or lower alkyl esters.

The usage quantity of other polyhydroxy reactant and other polycarboxylic acid composition for example can suitably be selected in the scope that with respect to polyhydroxy reactant and polycarboxylic acid composition total amount is 0～80 weight %.

Illustrated,,, also can use commercially available polyester glycol composition, polyether glycol composition, polycaprolactone glycol to become to grade in order easily to obtain the polymkeric substance of target molecular weight as polyhydroxy reactant.Specifically, the polyester glycol composition for example can be enumerated ethylene glycol, glycol ether, 1, the 4-butyleneglycol, neopentyl glycol, the 3-methyl isophthalic acid, the 5-pentanediol, 2-butyl-2-ethyl-1, ammediol, 2,4-diethyl-1, the 5-pentanediol, 1, the 8-ethohexadiol, 1, the 9-nonanediol, the 2-methyl isophthalic acid, the 8-ethohexadiol, 1, the 8-decanediol, diol components such as octadecandiol, with succsinic acid, methylsuccinic acid, hexanodioic acid, pimelic acid, nonane diacid, sebacic acid, 1, the 12-dodecylic acid, 1, dicarboxylic acid composition and derivatives thereof such as dicarboxylic acid compositions such as 14-tetradecane diacid or their acid anhydrides or lower alkyl esters or lower alkyl esters, the polyester glycol that under independent or admixture, forms etc. through dehydration reaction, commercially available product for example can be enumerated the 3-methyl isophthalic acid, the polyester glycol of 5-pentanediol and hexanodioic acid---trade(brand)name " Kuraray Polyol P-510 ", " Kuraray Polyol P-1010 ", " KurarayPolyol P-2010 ", " Kuraray Polyol P-3010 ", " Kuraray Polyol P-5010 " (above is (strain) Kuraray system) etc.

The polyether glycol composition for example can be enumerated polyoxyethylene glycol, polypropylene glycol, the polytetramethylene glycol that ring-opening polymerizations such as making oxyethane, propylene oxide, tetrahydrofuran (THF) forms and make polyethers that their copolymerization form etc., and commercially available product for example can be enumerated the polyether glycol that propylene glycol addition propylene oxide forms---trade(brand)name " Adeka Polyether P-400 ", " Adeka Polyether P-1000 ", " AdekaPolyether P-2000 ", " Adeka Polyether P-3000 " (above be rising sun electrochemical industry (strain) system) etc.

It is polyester glycol etc. that the polycaprolactone glycol composition for example can be enumerated the caprolactone that gets by cyclic ester monomer ring-opening polymerizations such as 6-caprolactone, σ-valerolactones, and commercially available product for example can be enumerated trade(brand)name " PLACCEL L205AL ", " PLACCEL L212AL ", " PLACCELL220PL ", " PLACCEL L230AL " (above is Daicel chemical industry (strain) system) etc.

In the binder composition of the present invention, can preferably use aliphatic acid ester carbonate diol component with structural unit that following formula represents.By using following diol component, can obtain the better binder composition of thermotolerance.In the following formula, R is the straight chain shape of carbon number 2～20 or divides dendritic alkyl.

The concrete example of such aliphatic acid ester carbonate diol component can be enumerated: carbonic ether diol components such as propylene carbonate esterdiol, carbonic acid hexa-methylene esterdiol, carbonic acid 3-methylpentene esterdiol; By ethylene glycol, glycol ether, 1, the 2-propylene glycol, 1, ammediol, 1, the 3-butyleneglycol, 1, the 4-butyleneglycol, the Alpha-Methyl butyleneglycol, the alpha-alpha-dimethyl butyleneglycol, 1, the 5-pentanediol, 2-methyl-2, the 4-pentanediol, the 3-methyl isophthalic acid, the 5-pentanediol, 1, the 6-hexylene glycol, 1, the 8-ethohexadiol, 2-methyl 1, the 8-ethohexadiol, tetramethylene-1,3-two (2-ethanol), 1,4-dihydroxyl hexanaphthene, hexanaphthene-1, the 4-dimethanol, 1, the 9-nonanediol, decamethylene-glycol, 1, the 12-dodecanediol, neopentyl glycol, contain carbon number and be the polycarbonate diol composition that such glycols such as the long chain diol of the polyether polyols of alkylidene group of 2～9 (preferred 2～4) or polytetramethylene ether diol etc. and their derivative and phosgene generation polycondensation obtain; The carbonic diester class generation transesterify condensation reaction that above-mentioned glycols and methylcarbonate, diethyl carbonate, dipropyl carbonate, carbonic acid diisopropyl ester, dibutyl carbonate, ethyl butyl carbonate, NSC 11801, propylene carbonate, diphenyl carbonate, carbonic acid dibenzyl ester etc. are such and the polycarbonate diol composition; Unite the copolymerization polycarbonate diol component that uses above-mentioned glycols more than 2 kinds and get; By above-mentioned various polycarbonate diol compositions and carboxylated compound generation esterification and the polycarbonate diol composition that obtains; Above-mentioned various polycarbonate diol composition and hydroxy-containing compounds generation etherification reaction and the polycarbonate diol composition; Above-mentioned various polycarbonate diol composition and ester cpds generation transesterification reaction and the polycarbonate diol composition that obtains; Above-mentioned various polycarbonate diol composition and hydroxy-containing compounds generation transesterification reaction and the polycarbonate diol composition that obtains; Above-mentioned various polycarbonate diol composition and dicarboxylic acid compound generation polycondensation and the distortion polyester that obtains is the polycarbonate diol composition; The copolyether that above-mentioned various polycarbonate diol composition obtains with epoxide generation copolymerization is that polycarbonate diol becomes to grade, and the commercially available product of the preferred carbonic ether diol component that uses for example can be enumerated trade(brand)name " PLACCEL CD205 ", " PLACCELCD210 "; " PLACCEL CD220 "; " PLACCEL CD205PL "; " PLACCELCD210PL "; " PLACCEL CD220PL " (more than be Daicel chemical industry (strain) system) or " PMHC-2050 "; " PMHC-2070 "; " PNOC-1000 ", " PNOC-2000 " (above is (strain) Kuraray system) etc.

Consider from obtaining binding property and stable on heating equilibrated reason easily, can also in tackiness agent of the present invention, add polyhydroxy reactant or polycarboxylic acid composition more than 3 yuan.

Polyvalent alcohol more than 3 yuan can be enumerated glycerine, TriMethylolPropane(TMP), 1,2,4-trihydroxybutane, 1,2,5-penta triol, 1,2, aliphatic polyol and derivatives thereof such as 6-hexanetriol, tetramethylolmethane, Dipentaerythritol.In addition, polycarboxylic acid more than 3 yuan can enumerate 1,2,4-butane tricarboxylic acid, 1,2,5-hexane tricarboxylic acid, 1,2,4-hexanaphthene tricarboxylic acid, meso-butane-1,2,3, aromatic series polycarboxylic acids such as aliphatics polycarboxylic acid, trimellitic acid, Pyromellitic Acids such as 4-tetracarboxylic acid etc. or their acid anhydrides, lower alkyl esters etc.

In addition, as the polycarboxylic acid composition, can enumerate aliphatic dicarboxylic acid, aromatic series polycarboxylic acid in the available carboxylic acid usually.Specifically, can enumerate succsinic acid, methylsuccinic acid, hexanodioic acid, pimelic acid, nonane diacid, sebacic acid, 1, aliphatic dicarboxylic acids such as 12-dodecylic acid, 1,14-tetradecane diacid, dimeracid, or phthalic acid, 1,4-naphthalene dicarboxylic acids, 4, aromatic dicarboxylic acids such as 4 '-diphenyl dicarboxylic acid, and their acid anhydrides, lower alkyl esters etc.

For the dispersity (weight-average molecular weight/number-average molecular weight) that makes polyester reaches appropriate value, the usage quantity of polyvalent alcohol more than 3 yuan and/or the polycarboxylic acid more than 3 yuan should be selected optimum quantum of utilization according to its molecular weight and valence mumber.Usually, with respect to the total amount of aliphatic diol and dicarboxylic acid, can contain the ratio of 2～30 weight %, preferred 4～1.5 weight %.The above-mentioned polyvalent alcohol and/or the usage quantity of the polycarboxylic acid more than 3 yuan during more than 3 yuan less than 2 weight %, the dispersity of polyester diminishes easily, and during greater than 20 weight %, the dispersity of polyester becomes excessive, at this moment, causes obstacle as described later sometimes easily.

The dispersity of the polyester when using polyvalent alcohol more than 3 yuan and/or the polycarboxylic acid more than 3 yuan be (weight-average molecular weight/number-average molecular weight) more than 0.5, preferred more than 1, more preferably more than 2.2, further preferred more than 2.5, preferred more than 2.7 especially.The upper limit is preferred below 25, and is more preferably below 20, further preferred below 14, preferred especially below 13.The dispersity of polyester as mentioned above, can be adjusted by the usage quantity or the number-average molecular weight of polyvalent alcohol more than 3 yuan and/or the polycarboxylic acid more than 3 yuan, can adjust to suitable dispersity according to the purposes purpose in above-mentioned scope.Dispersity is difficult to keep the balance of physical strength and flexibility during less than lower value, has can't take into account thermotolerance and to the fusible tendency of uneven surface.In addition, when dispersity was excessive, the polyester viscosity increased caused gelation easily, and the tendency that is difficult to form adhesive sheet is arranged, so dispersity is preferably in above-mentioned scope.

Illustrated that weight-average molecular weight and number-average molecular weight are measured and got by GPC (gel permeation chromatography).

Use aforesaid polyhydroxy reactant and polycarboxylic acid composition, adopt suitable catalyzer etc., by esterification, can obtain polyester is tackiness agent.In this reacts, polyhydroxy reactant and the preferred reaction with same mole of polycarboxylic acid composition, but for promoting the ester reaction to carry out, superfluous either party material of employing reacts all can.This binder composition by cross-linked polyester, can be realized the function as tackiness agent effectively.The method of the crosslinking Treatment of cross-linked polyester does not have particular determination, for example, can preferably use in polyester add contain the functional group that can react with hydroxyl and/or carboxyl compound (for example, the linking agent of polyisocyanate compounds, epoxy compounds, aziridine cpd etc.) make it crosslinked method, the method for the so-called linking agent of employing, linking agent can be enumerated polyisocyanate compounds, epoxy compounds, aziridine cpd etc. as mentioned above, wherein, especially preferably use polyisocyanate compounds.Linking agent can use more than 2 kinds alone or in combination.

Polyisocyanate compounds as linking agent for example can be enumerated lower aliphatic polymeric polyisocyanate classes such as tetramethylene diisocyanate, hexamethylene diisocyanate; Alicyclic isocyanate classes such as cyclopentylidene vulcabond, cyclohexylidene vulcabond, isoflurane chalcone diisocyanate; 2, aromatic diisocyanate classes such as 4-toluene support vulcabond, 4,4 '-'-diphenylmethane diisocyanate, xylylene diisocyanate; TriMethylolPropane(TMP)/3 times of body affixtures of toluene support vulcabond (for example, trade(brand)name " コ ロ ネ one ト L ", Japanese polyurethane industry (strain) system), 3 times of body affixtures of TriMethylolPropane(TMP)/hexamethylene diisocyanate (for example, trade(brand)name " コ ロ ネ one ト HL ", Japanese polyurethane industry (strain) system) isocyanate addition product etc. such as.

The usage quantity of linking agent, according to the balance of the molecular weight of polyester that should be crosslinked, and then according to suitably selecting as the use of tackiness agent etc.During according to the use of linking agent, in general, the usage quantity of linking agent is more than 0.5 weight part with respect to polyester 100 weight parts.The usage quantity that linking agent preferably uses is that to make polyester be (more than the preferred 20 weight %) more than the 10 weight % through the insoluble composition of the solvent after the crosslinking Treatment.Illustrated that the details of the solvent insoluble composition of polyester after crosslinking Treatment as described later.Thus, in the present invention, can take into account physical strength and flexibility (perhaps, can take into account thermotolerance and binding property), therefore need not the strict usage quantity of adjusting linking agent, can carry out the crosslinking Treatment of polyester easily.

In addition, as basic linking agent, can use electron(beam)curing compound (polyfunctional monomer).This polyfunctional monomer is the compound that has a plurality of unsaturated link(age)s in 1 molecule, can be by generation crosslinking reactions such as electron rayies.As this polyfunctional monomer, can preferably use (methyl) acrylic ester polyfunctional monomer.Be somebody's turn to do (methyl) acrylic ester polyfunctional monomer, for example, comprise polyoxyethylene glycol two (methyl) acrylate, tetramethylolmethane three (methyl) acrylate, tetramethylolmethane four (methyl) acrylate, Dipentaerythritol monohydroxy five (methyl) acrylate, Dipentaerythritol six (methyl) acrylate, tetramethylol methane four (methyl) acrylate, trimethylolpropane tris (methyl) acrylate, 1,4-butyleneglycol two (methyl) acrylate, 1,6-hexylene glycol two (methyl) acrylate etc.Polyfunctional monomer can be used singly or two or more kinds in combination.

The usage quantity and the linking agent of above-mentioned polyfunctional monomer are same, according to and polyester that should be crosslinked between balance, and then according to can suitably selecting as the use of tackiness agent etc.The usage quantity of polyfunctional monomer is more than 1 weight part with respect to polyester 200 weight parts generally, under this usage ratio, undertaken crosslinkedly by electron rays, can make polyester reach (more than the preferred 20 weight %) more than the 10 weight % through the insoluble composition of the solvent after the crosslinking Treatment.Thus, for the crosslinked function of tackiness agent that makes by polyester is well brought into play, polyester is (more than the preferred 20 weight %) more than the 10 weight % through the insoluble composition expectation of the solvent after the crosslinking Treatment.The insoluble composition of the solvent of polyester after crosslinking Treatment is during less than 10 weight %, the cohesive force deficiency of tackiness agent sometimes, and physical strength is low, and can't fully obtain thermotolerance.Illustrated, the insoluble composition of the solvent of polyester after crosslinking Treatment is during greater than 70 weight %, the flexibility of the crosslinked body of polyester is impaired, and easily reduces binding property, so the expectation of the upper limit of the solvent insoluble composition of polyester after crosslinking Treatment is 70 weight % (preferred 60 weight %).

Illustrated, solvent in the insoluble composition of solvent after polyester cross-linking is handled can be according to suitably selections such as application targets, for example can use aromatic hydrocarbon such as toluene, dimethylbenzene, aliphatic hydrocarbons such as hexane, alicyclic hydrocarbon such as hexanaphthene, alcohol such as methyl alcohol, ethanol, esters such as ethyl acetate, ketone such as butanone, glycol such as ethylene glycol, glycol ethers such as dihydroxypropane single-ether etc.

In addition, be (for example-100 ℃～-10 ℃), preferred below-20 ℃ (for example-100 ℃～-20 ℃) below-10 ℃ through polyester or through the second-order transition temperature of the polyester of crosslinking Treatment.Polyester or the polyester second-order transition temperature after crosslinking Treatment is during greater than-10 ℃, and the crosslinking structural body hardening of polyester, flexibility is low, binding property is low.Illustrated,, adopt the situation of second-order transition temperature of the crosslinking structural body of polyester after crosslinking Treatment in the majority usually as this second-order transition temperature.Adopt similarly in this specification sheets.

In addition, preferably to contain (methyl) alkyl acrylate and contain with the hydrophilic monomer be the acrylic acid polymer of monomeric unit to acrylic adhesive.The preferred carbon number of alkyl of (methyl) alkyl acrylate is 2～14, and is that any one form of straight chain shape, branch-like and cyclic all can.This alkyl for example can be enumerated ethyl, propyl group, sec.-propyl, butyl, isobutyl-, isopentyl, hexyl, heptyl, 2-ethylhexyl, iso-octyl, different nonyl, isodecyl etc.Wherein, the alkyl of preferred carbon number 2～10, the more preferably alkyl of carbon number 4～8 such as butyl, 2-ethylhexyl.Carbon number is beyond the above-mentioned scope time, and it is insufficient that bounding force becomes, and is difficult to realize the function of tackiness agent.Illustrated that above-mentioned (methyl) alkyl acrylate can be used in combination more than a kind or 2 kinds.

Hydrophilic monomer just is not particularly limited so long as intramolecularly contains hydrophilic radicals such as hydroxyl, amino, amide group, sulfonic group, carboxyl, anhydride group, imide, phosphate, epoxy alkyl.Specifically, can enumerate (methyl) vinylformic acid 2-hydroxyl ethyl ester, (methyl) vinylformic acid 2-hydroxypropyl acrylate, (methyl) vinylformic acid 2-hydroxy butyl ester, 4-hydroxybutyl (methyl) acrylate, 6-hydroxyl hexyl (methyl) acrylate, 8-hydroxyl octyl group (methyl) acrylate, 10-hydroxyl decyl (methyl) acrylate, 12-hydroxyl lauryl (methyl) acrylate, (4-hydroxymethyl cyclohexyl) methacrylic ester, N-methylol (methyl) acrylamide, vinyl alcohol, vinyl carbinol, 2-hydroxyethyl Vinyl Ether, 4-hydroxybutyl Vinyl Ether, the diglycol monotertiary Vinyl Ether, 3-hydroxypropyl (methyl) acrylate, 4-hydroxybutyl (methyl) acrylate, 2-hydroxyl hexyl (methyl) acrylate, 6-hydroxyl hexyl (methyl) acrylate, 8-hydroxyl octyl group (methyl) acrylate, 10-hydroxyl decyl (methyl) acrylate, 12-hydroxyl lauryl (methyl) acrylate etc. contains the monomer of hydroxyl, (methyl) dimethylaminoethyl acrylate, (methyl) vinylformic acid lignocaine ethyl ester, (methyl) vinylformic acid uncle fourth amino ethyl ester, N, N-dimethylaminopropyl (methyl) acrylate etc. contain amino monomer; (methyl) acrylamide, N, N-diethyl (methyl) acrylamide, N, N-dimethyl (methyl) acrylamide, N-methylol (methyl) acrylamide, N-methoxymethyl (methyl) acrylamide, N-butoxymethyl (methyl) acrylamide, N, N-methylene-bis (methyl) acrylamide, the N-N-isopropylacrylamide, N, N-dimethylaminopropyl acrylamide etc. contains the monomer of amide group, styrene sulfonic acid, allyl sulphonic acid, 2-(methyl) acrylamide-2-methyl propane sulfonic acid, (methyl) acrylamide propanesulfonic acid, sulfo-propyl group (methyl) acrylate, (methyl) acryloyl-oxy naphthene sulfonic acid etc. contains sulfonic monomer, (methyl) vinylformic acid, propyloic (methyl) acrylate, carboxylic amyl group (methyl) acrylate, methylene-succinic acid, toxilic acid, fumaric acid, Ba Dousuans etc. contain the monomer of carboxyl, maleic anhydride, itaconic anhydrides etc. contain the monomer of anhydride group, the cyclohexyl maleic anhydride imines that contracts, the sec.-propyl maleic anhydride imines that contracts, the N-cyclohexyl maleic anhydride imines that contracts, clothing health imide, the N-phenyl maleic anhydride imines etc. that contracts contains the monomer of imide, and 2-hydroxyethyl acryloyl phosphoric acid ester etc. contains the monomer of phosphate; In addition, can enumerate (methyl) vinyl cyanide, N-(methyl) acryloyl morpholine, N-vinyl-2-Pyrrolidone, N-ethene hexanolactam etc.They can be used in combination more than a kind or 2 kinds.

As containing the monomeric oxidation cycloalkyl of epoxy alkyl unit, can enumerate the alkylidene group that contains carbon number 1～6, for example can enumerate oxidation methylene radical, oxidation cyclohexane base, oxidation cyclopropane base, oxidation tetramethylene base.The alkyl of oxidation cycloalkyl chain both can be a straight chain, also can be side chain.

In addition, as the average addition mole number of oxidation cycloalkyl unit in the above-mentioned monomer that contains epoxy alkyl, from considered by the viewpoint of wet the moistening property of convered structure, preferred 3～40, more preferably 4～35, preferred especially 5～30.By making above-mentioned average addition mole number greater than 3, can obtain with by better wet the moistening property of convered structure.In addition, above-mentioned average addition mole number had the tendency that increases by the pollution of convered structure greater than 40 o'clock.Illustrated that the end of oxidation cycloalkyl chain can directly be a hydroxyl, perhaps also can be waited replacement by other functional group.And then the monomer that contains above-mentioned epoxy alkyl preferably contains the monomer of Oxyranyle.Contain monomeric (methyl) Acrylic Acid Monomer by use with Oxyranyle, can easily obtain with by better wet the moistening property of convered structure.As the concrete example of the affixture of (methyl) acrylic acid epoxy thing, for example can enumerate: polyoxyethylene glycol (methyl) acrylate, polypropylene glycol (methyl) acrylate, polyethylene glycol-propylene glycol (methyl) acrylate, polyethylene glycol-butyleneglycol (methyl) acrylate, polypropylene glycol-polytetramethylene glycol (methyl) acrylate, methoxy poly (ethylene glycol) (methyl) acrylate, oxyethyl group polyoxyethylene glycol (methyl) acrylate, butoxy polyoxyethylene glycol (methyl) acrylate, octyloxy polyoxyethylene glycol (methyl) acrylate, bay oxygen base polyoxyethylene glycol (methyl) acrylate, stearic oxygen base polyoxyethylene glycol (methyl) acrylate, phenoxy group polyoxyethylene glycol (methyl) acrylate, methoxyl group polypropylene glycol (methyl) acrylate, octyloxy polyethylene glycol-propylene glycol (methyl) acrylate etc.

In order to make the contact angle that can give water is the acrylic adhesive of the bonding coat of above-mentioned scope, for example, preferably contain the acrylic acid polymer that obtains by (methyl) alkyl acrylate 70～100 weight parts (preferred 70～80 weight parts) and hydrophilic monomer 1～30 weight part (preferred 20～30 weight all).At this moment, as hydrophilic monomer, that preferably selects from (methyl) vinylformic acid 2-hydroxy methacrylate, N-(methyl) acryloyl morpholine and (methyl) acrylamide is used in combination more than a kind or 2 kinds arbitrarily.In addition, also preferably contain the acrylic acid polymer that obtains by 2-EHA 70～80 weight parts and hydrophilic monomer 20～30 weight parts, or the acrylic acid polymer that obtains by butyl acrylate 90～100 weight parts and hydrophilic monomer 1～10 weight part.Illustrated that polymerization process does not have particular determination, for example can be adopted conventional polymerization processs such as solution polymerization, letex polymerization.In addition, as polymerization starter, for example can use known polymerization starters such as azo series initiators, superoxide series initiators.The weight-average molecular weight of the acrylic acid polymer of gained (Mw) is generally 300,000～2,000,000, preferred 500,000～1,700,000 thus.Mw is less than 300,000 o'clock, is difficult to obtain the cohesive force as tackiness agent, and thermotolerance and weather resistance are tending towards lowly, on the other hand, when Mw greater than 2,000,000 the time, exist viscosity to uprise, be difficult to form the tendency of adhesive sheet.

In addition, masking tape complete the back, for the contact angle of the lateral water that makes bonding coat less than 100 °, and make the contact angle of water more little less than the contact angle of the lateral water of 100 ° bonding coat, also can carry out surface treatment to the side of masking tape, described surface treatment can be enumerated the coating of easy adhesion process, hydrophilic material (for example, photocatalyst) etc.Photocatalyst for example can be enumerated titanium dioxide (TiO ₂), zinc oxide (ZnO), stannic oxide (SnO ₂), strontium titanate (SrTiO ₃), Tungsten oxide 99.999 (WO ₃), bismuth oxide (Bi ₂O ₃), ferric oxide (Fo ₂O ₃) wait photosemiconductor, they can be used in combination more than a kind or 2 kinds.Illustrated that there is Detitanium-ore-type and rutile-type structure in titanium oxide, present embodiment use any one mode all can, but preferred Detitanium-ore-type.By using above-mentioned photocatalyst, wet the moistening property that can positively obtain base material further improves and the film of uniform film thickness.

In addition, as required, can in tackiness agent, contain linking agent or tensio-active agent.Linking agent can use in the art used linking agent usually, for example can enumerate the isocyanate-based linking agent, epoxy is that linking agent,  azoles quinoline are that linking agent, aziridine are that linking agent, metal chelator are linking agent etc.Wherein, preferred isocyanate is that linking agent, epoxy are linking agent.The use level of described linking agent is generally 0.01～10 weight part, preferred 1～6 weight part with respect to above-mentioned component of polymer 100 weight parts (solids component).When the use level of linking agent is very few, exist cross-linking density low, be difficult to obtain the tendency of sufficient intensity, on the other hand, when the use level of linking agent is too much, exist or bounding force low, or the tendency of operability deterioration when making.In addition, as tensio-active agent, can enumerate nonionogenic tensides such as polyoxyethylene polyoxy propylene glycol, Voranol EP 2001, polyxyethylated phenylate, sorbitan-fatty acid ester, polyoxyethylene fatty acid ester.Wherein, tail off from foaming, the good angle of paste face outward appearance is considered, preferred polyoxyethylene polyoxypropylene glycol as エ パ Application (trade(brand)name, the first industrial pharmacy (strain) system), can be purchased.The use level of described tensio-active agent is generally 0.001～1 weight part, preferred 0.01～0.1 weight part with respect to above-mentioned component of polymer 100 weight parts (solids component).

And, as required, can also in tackiness agent, add tackifier, antiaging agent, weighting agent, pigment, tinting material etc.Tackifier can be enumerated rosin series resin, terpenic series resin, aliphatics through-stone oleo-resinous, aromatic series through-stone oleo-resinous, copolymerization through-stone oleo-resinous, alicyclic through-stone oleo-resinous etc.

(the 2nd embodiment)

Fig. 2 (b) is the sectional view of the masking tape for board of expression the 2nd embodiment.The masking tape for board 20 of present embodiment, bonding coat 3 by bonding plane on be formed with on spacer 5 this point, different with the masking tape for board 10 of above-mentioned the 1st embodiment, the formation of base material 1 and bonding coat 3 is as described in the above-mentioned embodiment.Illustrated that spacer can suitably be installed according to application target.As spacer, can enumerate illustrative material in the above-mentioned base material.In order to improve separability, as required, also can implement the demouldings such as organosilicon processing, chain alkyl processing, fluorine processing and handle the surface of spacer from bonding coat.In addition, the thickness of spacer is generally 10～300 μ m, preferred 20～100 μ m, more preferably 38～75 μ m.

Next, the manufacture method to masking tape for board of the present invention describes.In general masking tape for board is made by the following method, promptly, above-mentioned tackiness agent of coating and dry, formation bonding coat on base material, perhaps after being coated with above-mentioned tackiness agent and drying on other base materials such as interleaving paper, forming bonding coat, make it to be fitted on the base material, make masking tape for board.In addition, masking tape for board shown in Figure 1 can be made by the following method: for example, by after forming bonding coat on the face of base material, the surface of bonding coat is overlapped with another face of base material, be wound in the roller shape, make masking tape for board.Illustrated, during coating adhesive, can use coating machine commonly used on base material, for example intaglio plate roller coating machine, contrary roll-coater, contact roller coating machine, dipping roller coating machine, rod are coated with machine, cutter is coated with machine, spraying machine, die fountain coater etc.At this moment, coating adhesive make that the thickness of dried bonding coat is generally about 3～100 μ m, about preferred 5～60 μ m, more preferably about 10～40 μ m.

Masking tape for board of the present invention, be for example on substrate for organic el, for example be coated with free-flowing materials such as organic EL Material, conductive material in turn with nozzle coating method etc., add coated film, make in the manufacturing process of organic ELD (display panel) of organic ELD (display panel), before the coating free-flowing material, the zone that does not need to be coated with on substrate attaches masking tape for board of the present invention, uses.

The masking tape for board of the application of the invention, be coated on the increase that the film (filming) of the free-flowing material of (sidepiece) around the masking tape can not produce the thickness of not expecting, can avoid problem that the increase because of the thickness of not expecting of this film (filming) produces (for example, negative electrode on organic ELD broken string, or at negative electrode to the moisture of outside and the barrier reduction of oxygen etc.).

Above-mentioned " organic EL Material " for example be meant poly-to vinylbenzene (PPV), poly-to styrene derivatives, Polythiophene (PAT), polythiofuran derivative, fluorene derivatives, poly-to benzene (PPP), poly-known luminescence polymer such as benzene derivative, carbazole derivative, polysilane based polymer disperseed and even is dissolved in dispersion liquid or solution in the solvent, in addition, " conductive material " be meant polyethylene dihydroxy thiophene (PEDOT)-polystyrolsulfon acid (PSS), polyaniline (PA)-PSS, PTPDES (that is formula:

The polymkeric substance of expression) etc. known electric conductive polymer disperses and even is dissolved in dispersion liquid or solution in the solvent.These dispersion liquids or solution are generally with more than at least 0.1 weight %, more than the preferred 0.5 weight %, more preferably the concentration more than the 1 weight % contains luminescence polymer or electric conductive polymer.

Use masking tape for board of the present invention, the embodiment when making organic ELD is as described below.

Organic ELD of present embodiment has pair of electrodes in opposite directions and is disposed at the above organic layer of one deck between this electrode.

At first, prepared substrate.Substrate for example can use transparency carriers such as glass substrate, plastic base.In addition, substrate can be by the Butut of enforcement settings such as for example ITO (tin indium oxide).Then, cover with masking tape for board of the present invention down in room temperature～80 ℃ and do not need dispensing area (the non-formation of film is regional) on the substrate.

Then, the coating fluid that polyethylene dihydroxy thiophene-polystyrolsulfon acid (PEDOT-PSS) will be dispersed in the water is coated on the substrate with the nozzle coating method, and formation thickness is the uniform thin film about 50nm～100nm.

Then, perhaps peel off masking tape for board post-heating dry substrate, peel off masking tape for board behind the heat drying substrate, form hole transporting layer.

Then, do not need dispensing area (the non-formation of film is regional) with what masking tape for board of the present invention covered substrate down room temperature or 80 ℃.

Then, on substrate, be coated with organic EL Material (R, G with the nozzle coating method, B), perhaps peel off masking tape for board post-heating dry substrate, perhaps peel off masking tape for board behind the heat drying substrate, formation thickness is the uniform luminescent layer about 60～80nm.

Then, substrate is transferred in the vacuum evaporation plating machine, by evaporation at the negative electrode that forms on the above-mentioned luminescent layer about thickness 200～300nm.Then, live the attaching part of masking tape for board with adhesive seal.Can obtain organic ELD thus.

Masking tape for board of the present invention is not limited in the manufacturing process that is used in aforesaid organic ELD.Also applicable in manufacturing process such as liquid crystal, organic film solar cell, plasma display.Promptly, masking tape for board of the present invention, applicable work not only on substrate for organic el, and liquid crystal with substrate, organic film substrate for solar cell, plasma display with substrate, semiconductor crystal wafer, CD with various substrates such as substrates on coating cover the masking tape that does not need dispensing area on the substrate when forming the film (filming) of free-flowing material.

And masking tape for board of the present invention is specially adapted to have at least the manufacturing process (manufacturing process such as organic ELD, liquid crystal, organic film solar cell, plasma display) that the free-flowing material that will contain the solution that uses water solvent or dispersion liquid is coated on the operation on the substrate.That is, when coating uses the free-flowing material of water solvent to form film, can suppress to be coated on the increase of the thickness of not expecting of the film (filming) of the free-flowing material of (sidepiece) around the masking tape especially effectively.Illustrated, at this, so-called " water solvent " is meant with water or based on the solvent of water, specifically, can enumerate common water, pure water, distilled water or ion exchanged water etc., or in respect to the scope of water, mix the solvent of hydrophilic organic solvents such as Fatty Alcohol(C12-C14 and C12-C18) that carbon number is 1～7 (preferred carbon number is 1～4), acetone less than 50 weight %.

Masking tape for board of the present invention not only can be used for by nozzle coating method film forming situation on substrate, also applicable to passing through other known method film forming situations on substrate such as ink jet method, method of spin coating.

Embodiment

Below, being described more specifically the present invention by embodiment, the present invention is not limited to these embodiment.

(preparation of tackiness agent)

(Production Example 1)

Packing in being equipped with the detachable flask of four necks of agitator, thermometer and byproduct of reaction separator tube, (trade(brand)name: PLACCEL CD220 PL, hydroxyl value: 55.1KOHmg/g, Daicel chemical industry (strain) system) 200.0 weight parts, sebacic acid 19.8 weight parts and as positive four butyl esters of the metatitanic acid of catalyzer 0.1 weight part add a small amount of dimethylbenzene as the discharge solvent of byproduct of reaction water to polycarbonate diol.Then, stirring reaction solution is warming up to 180 ℃, necessarily stirs under this temperature.After a while, confirm to have the outflow of water to separate, after the affirmation reaction begins to carry out, about 18 hours of heated and stirred.Obtain the polyester of weight-average molecular weight 49000, dispersity 1.8.

Then, with respect to gained polyester 100 weight parts, add isocyanate-based linking agent (trade(brand)name: コ ロ ネ one ト HL, Japanese polyurethane industry (strain) system) 3.5 weight parts, obtaining polyester is tackiness agent.

(Production Example 2)

With the same reaction vessel of Production Example 1 in add 2-EHA (2-EHA) 75 weight parts, N-acryloyl morpholine (ACMO) 25 weight parts, vinylformic acid (AA) 3 weight parts and vinylformic acid 2-hydroxy methacrylate (HEA) 0.5 weight part, carry out conventional solution (ethyl acetate) polymerization, obtain the acrylic acid polymer of weight-average molecular weight 1100000.

Then, with respect to gained acrylic acid polymer 95 weight parts, adding epoxy is linking agent (trade(brand)name: Tetrad C, Mitsubishi's aerochemistry industry (strain) system) 1.5 weight parts, isocyanate-based linking agent (trade(brand)name: コ ロ ネ one ト L, Japanese polyurethane industry (strain) system) 2 weight parts and nonionogenic tenside (trade(brand)name: エ パ Application 71O, the first industrial pharmacy (strain) system) 0.05 weight part, obtains acrylic adhesive (hereinafter referred to as " acrylic adhesive A ").

(Production Example 3)

With the same reaction vessel of Production Example 1 in pack into 2-EHA 9O weight part and HEA 3.5 weight parts, carry out conventional solution (ethyl acetate) polymerization, obtain weight-average molecular weight and be 600000 acrylic acid polymer.

Then,, add isocyanate-based linking agent (Japanese polyurethane industry (strain) system, コ ロ ネ one ト HX) 3.5 weight parts, obtain acrylic adhesive (below, be called " acrylic adhesive B ") with respect to gained acrylic acid polymer 100 weight parts.

(Production Example 4)

Organosilicon polymer (trade(brand)name: X-40-3229, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 70 weight parts to solids component 60%, organosilicon polymer (the trade(brand)name: KR-3770 that adds solids component 60%, SHIN-ETSU HANTOTAI's chemical industry (strain) system) catalyzer of 30 weight parts, solids component 5% (trade(brand)name: CAT-PL-50T, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 0.5 weight part, toluene 100 weight parts obtain the silicon-type tackiness agent.

(Production Example 5)

To with the same reaction vessel of Production Example 1 in add butyl acrylate (BA) 95 weight parts, vinylformic acid (AA) 5 weight parts, carry out conventional solution (ethyl acetate) polymerization, obtain the acrylic acid polymer of weight average molecule number 600000.

Then, with respect to gained acrylic acid polymer 100 weight parts, adding epoxy is linking agent (trade(brand)name; Tetrad C, Mitsubishi's aerochemistry industry (strain) system) 4.5 weight parts, isocyanate-based linking agent (trade(brand)name: コ ロ ネ one ト L, Japanese polyurethane industry (strain) system) 1 weight part obtains acrylic adhesive (below, claim " acrylic adhesive C ").

(embodiment 1)

On the organosilicon treated side of the spacer that organosilicon is handled, coating Production Example 1 gained polyester is a tackiness agent, makes thickness reach 15 μ m, and is dry under the condition of 130 ℃ * 3min following.Make a mask have antistatic layer, another mask that being fitted on the dried adhesive face through the corona treatment face of polyester film (trade(brand)name: T100N38, thickness 38 μ m, Mitsubishi Chemical's polyester (strain) system) of corona treatment face arranged, obtain masking tape.The gained masking tape is placed on the level and smooth sheet glass, cuts out with scraper with deburring, make sample from the base material side.Illustrated, deburring with the use of scraper 1 time blade do not re-use.

＜organosilicon is handled the manufacturing of spacer 〉

(making of demoulding type coating agent)

To polydimethylsiloxane (trade(brand)name: KS-3601, SHIN-ETSU HANTOTAI's chemical industry (strain) system) adds acetylene system reaction control agent (trade(brand)name: CAT PLR-1 in 100 weight parts, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 2 weight parts, acetylene system reaction control agent (trade(brand)name: CAT PLR-2, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 1 weight part, solvent (trade(brand)name: ノ Le マ Le ヘ キ サ Application, ball kind (strain) system), solvent (trade(brand)name: ノ Le マ Le ヘ プ Application, East Asia synthetic (strain) system, stirred 20 minutes, add catalyzer (trade(brand)name: CAT-PL-50T again, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 5 weight parts, stirred 10 minutes, and obtained the organosilicon masking liquid.

(making of demoulding type film)

Polyester film (trade(brand)name: S-105 in the single face corona treatment, thickness 50 μ m, east beautiful (strain) system) on the corona treatment face, be coated with above-mentioned organosilicon masking liquid with woodburytype, make it dry under 140 ℃ * 1min, (the dry back weight of organosilicon release layer is 0.07g/cm to obtain demoulding type polyester film ²).

(embodiment 2)

Use the acrylic adhesive A of Production Example 2 gained, the drying conditions of tackiness agent is changed to 140 ℃ * 3min, in addition, adopt method similarly to Example 1 to make masking tape.

(embodiment 3)

To be fitted in base material on the adhesive face as polyester film (trade(brand)name: S-10, thickness 38 μ m, east beautiful (strain) system), (trade(brand)name: alcohol is substrate treating agent at the back side of masking tape coat substrates treatment agent, the prosperous industry of ball (strain) is made) and photocatalyst (trade(brand)name: M-5 type alcoholic solvent, the prosperous industry of ball (strain) system), in addition, adopt method similarly to Example 2 to make masking tape.

(embodiment 4)

Use the acrylic adhesive B of Production Example 3 gained, the drying conditions of tackiness agent is set at 130 ℃ * 1min, after employing deburring is similarly to Example 1 cut out with scraper, at the side of masking tape coat substrates treatment agent (trade(brand)name: alcohol is the prosperous industry of substrate treating agent, ball (strain) system) and photocatalyst (trade(brand)name: M-5 type alcoholic solvent, the prosperous industry of ball (strain) system), in addition, adopt method similarly to Example 1 to make masking tape.

(embodiment 5)

Use the acrylic adhesive C of Production Example 5 gained, the drying conditions of tackiness agent is changed to 140 ℃ * 3min, in addition, adopt method similarly to Example 1 to make masking tape.

(comparative example 1)

Use the acrylic adhesive B of Production Example 3 gained, the drying conditions of tackiness agent is changed to 130 ℃ * 1min, in addition, adopt method similarly to Example 1 to make masking tape.

(comparative example 2)

On a face, has antistatic layer, polyester film (the trade(brand)name: T100N38 that has the corona treatment face on another face, thickness 38 μ m, Mitsubishi Chemical's polyester (strain) system) is coated with the silicon-type tackiness agent of following silane coupling agent and Production Example 4 gained on the corona treatment face in turn, the drying conditions of silane coupling agent is set at 120 ℃ * 2min, the drying conditions of tackiness agent is set at 100 ℃ * 5min, polyester film (the trade(brand)name: S-10 of on adhesive face, fitting, thickness 38 μ m, east beautiful (strain) system), in addition, adopt method similarly to Example 1 to make masking tape.

The preparation of＜silane coupling agent 〉

Organosilicon polymer (trade(brand)name: X-40-3501 to solids component 30%, SHIN-ETSU HANTOTAI's chemical industry (strain) system) catalyzer (trade(brand)name: CAT-PL-50T of adding solids component 5% in 100 weight parts, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 0.5 weight part, hexane 130 weight parts and butanone 130 weight parts obtain silane coupling agent.

(comparative example 3)

With being fitted in base material on the adhesive face, in addition, adopt method similarly to Example 2 to make masking tape as polyester film (trade(brand)name: S-10, thickness 38 μ m, east beautiful (strain) system).

(comparative example 4)

Implemented the polypropylene of corona treatment as thickness 40 μ m, single face with being fitted in base material on the adhesive face? polyethylene mixed film (polypropylene: polyethylene=90: 10 (weight ratio)), the corona treatment face is fitted in tackiness agent, in addition, adopt method similarly to Example 2 to make masking tape.

[evaluation test]

(1) contact angle of water

Tested surface is placed on the sheet glass, entirely fix masking tape after, with the glass syringe of stainless steel pin that is equipped with internal diameter 0.4mm the distilled water of 3 μ g is adsorbed on the tested surface.Adhere in back 20 seconds, with contact angle meter (trade(brand)name: CA-X type, consonance interface science (strain) system), measure contact angle according to θ/2 methods under 23 ℃ * 50%RH, contact angle adopts at 10 and measures, and gets and removes 2 mean value up and down.Illustrated, can not directly measure contact angle owing to the lateral thin thickness of bonding coat, so under the situation that spacer is arranged on the masking tape, as mentioned above, the bonding coat of having peeled off spacer by bonding plane on measure contact angle, with this contact angle as the water on the bonding coat side.In addition, the masking tape paste face contact masking tape back side forms under the situation of scroll, the bonding coat of having peeled off masking tape from the masking tape back side measured contact angle by bonding plane, with this contact angle as the water on the bonding coat side.Be coated with in the masking tape side under the situation of embodiment 4 of photocatalyst, peeled off spacer by bonding plane on coating photocatalyst similarly, measure the contact angle of this face, with this contact angle as the lateral water of bonding coat.Evaluation result is shown in table 1.

(2) lateral wet the moistening property test of masking tape

At glass (the little slide glass of 13mm * 65mm * 165mm, matsunami (strain) system) non-tin contact surface tilts glass and flows through on the washing face of toluene, attach masking tape, position at range finding face 1mm, glass syringe with the stainless steel pin that is equipped with internal diameter 0.8mm, attached water disperses liquid type conductive material (trade(brand)name: Bayer PVP CH8000, Bayer (strain) system) 0.5 μ g.Under 23 ℃ * 50%RH, placed 24 hours, peel off masking tape then, be determined at the width of masking tape side unfolded conductive material.Width is got and is measured 5 mean value.That is, Fig. 3 (a) attaches masking tape T, splashes into the conductive material 32 of aqueous dispersions type, and the mode chart of the mensuration face 31 of the square from it sight glass plate 30 when placing 24 hours, Fig. 3 (b) are to place after 24 hours, peel off the mode chart of the state of masking tape T.Above-mentioned " at the width of masking tape side unfolded conductive material " is meant the width of maximum wide (W1) of the side that contacts with the masking tape T of conductive material 32 under the state of Fig. 3 (b).

The width (W1) of the free-flowing material that judgement is measured thus is good greater than 3mm's, and width is bad below 3mm.

Evaluation result is as shown in table 1.

(3) wet the moistening property test at the masking tape back side

Tested surface is placed on the flat runner, fix masking tape, on tested surface, drip 1 with the polyethylene system dropper of 2ml (trade(brand)name: コ one De N0.1-4656-01, Asone (strain) system) and drip that (trade(brand)name: Bayer PVP CH8000, Bayer (strain) system), by following benchmark evaluation tested surface being tilted, whether conductive material tumbles dispersion liquid type conductive material 45 ° the time.Evaluation result is as shown in table 1.

Well (zero): do not tumble.

Bad (*): tumble.

(4) the film height of masking tape sidepiece

Measure the film height of masking tape sidepiece according to following method.

At first, after forming the ITO film on glass substrate or the transparent plastic substrate, adopt photolithography, Butut ITO film, the 1st electrode of many linears of formation.The 1st electrode is equivalent to anode.

Then, adopt the next door (bank, dividing plate) of formation electrical insulating properties such as photolithography, be embedded between each above-mentioned the 1st electrode.The material in next door for example can use inorganic materials such as organic materialss such as acrylic resin, Resins, epoxy, polyimide etc. or liquid glass.

Then, on the ITO film, attach masking tape, then, between each next door, supply with (coating) aqueous dispersions type conductive material (trade(brand)name: Bayer PVP CH8000, Bayer (strain) system).The supply use spy of the conductive material of this moment between each next door opens the described apparatus for coating of 2002-75640 communique and carries out.

Behind this painting process, between each next door, supply with cavity conveying liquid, from cavity conveying liquid, remove and desolvate with same device, simultaneously, 100 ℃ implement down 5～10 minutes after cure processing, form hole transporting layer.Illustrated, set the glue spread of conductive material, make the thickness of hole transporting layer reach tens of～hundreds of mn.

Then, peel off masking tape, distance is measured with section difference surfaceness fine shape determinator P-11 (KLA-Tencor (strain) system, trade(brand)name) towards the height of the ITO film of the lateral stripped end of adhesive tape of hole transporting layer.

This height is judged to be good (zero) below 5 μ m, be judged to be bad (*) greater than 5 μ m.

Organic EL is made by the following method, promptly, supply with organic EL Material, on the 1st electrode, form organic EL layer by hole transporting layer, after the formation of described organic EL layer finishes, in the mode vertical and relative, on substrate, be arranged side by side a plurality of or form the 2nd electrode comprehensively with vacuum vapour deposition etc. with the 1st electrode.At this, during with CVD device evaporation the 2nd electrode, if the stripped end of hole transporting layer is not less than the 5 μ ms of conduct by the evaporation upper limit of CVD device, the stripped end of hole transporting layer will be more outstanding than the 2nd electrode.Thus, whether the height of the stripped end of hole transporting layer is estimated below 5 μ m.

Illustrated that usually, the thickness of hole transporting layer is the very thin films of tens of nm～hundreds of nm, so it is the height of the stripped end of preferred this hole transporting layer is identical with the thickness of positive hole transfer layer,, also the smaller the better even perhaps the thickness than this positive hole transfer layer is big.

In addition, after forming above-mentioned hole transporting layer, the height of the stripped end of the organic EL layer of formation (PPV) is also estimated.

Its result can confirm to compare with comparative example 1～4, and the height of the stripped end of the organic EL layer of embodiment 1～4 diminishes relatively.

Table 1

	Base material	Handle at the back side of adhesive tape	Tackiness agent	Handle the side of adhesive tape	The contact angle of the lateral water of bonding coat [°]	The contact angle of the water at the adhesive tape back side [°]	The lateral wetting quality of adhesive tape [mm]	The wetting quality at the adhesive tape back side	The film height of adhesive tape sidepiece
										Embodiment
1	Polyester	Antistatic	Polyester	Do not have	85	57	7.5	○	○
										Embodiment 2	Polyester	Antistatic	Vinylformic acid A	Do not have	98	57	3.5	○	○
Embodiment 3	Polyester	Photocatalyst	Vinylformic acid A	Do not have	98	14	3.5	○	○
										Embodiment 4	Polyester	Antistatic	Vinylformic acid B	Photocatalyst	29	57	18.2	○	○
Embodiment 5	Polyester	Antistatic	Vinylformic acid C	Do not have	94	57	4.5	○	○
										Comparative example 1	Polyester	Antistatic	Vinylformic acid B	Do not have	105	57	2.6	○	×
Comparative example 2	Polyester	Antistatic	Organosilicon	Do not have	121	57	1.4	○	×
										Comparative example 3	Polyester	Do not have	Vinylformic acid A	Do not have	98	71	3.5	×	×
Comparative example 4	Polypropylene	Do not have	Vinylformic acid A	Do not have	98	98	3.2	×	×

Claims (9)

1. masking tape for board is the masking tape for board that has bonding coat on a face of base material, and wherein, the contact angle of the water on another face of base material is less than 65 °, and the contact angle of the water on the side of bonding coat is less than 100 °.

2. the described masking tape of claim 1, wherein, bonding coat by bonding plane on have spacer.

3. the described masking tape of claim 1, wherein, base material comprises ployester series film.

4. the described masking tape of claim 1 wherein, has surface-treated layer on another face of base material.

5. the described masking tape of claim 1, wherein, the side of bonding coat has surface-treated layer.

6. the described masking tape of claim 5, wherein, surface-treated layer is coated with photocatalyst.

7. each described masking tape in the claim 1～6, wherein, substrate is a glass substrate.

8. each described masking tape in the claim 1～6, wherein, substrate is a substrate for organic el.

9. each described masking tape in the claim 1～6, it uses when the coating method of base plate coating free-flowing material forms film utilizing from nozzle.

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