CN102119348A - Optical film with adhesive and optical laminate using same - Google Patents

Optical film with adhesive and optical laminate using same Download PDF

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Publication number
CN102119348A
CN102119348A CN2009801311946A CN200980131194A CN102119348A CN 102119348 A CN102119348 A CN 102119348A CN 2009801311946 A CN2009801311946 A CN 2009801311946A CN 200980131194 A CN200980131194 A CN 200980131194A CN 102119348 A CN102119348 A CN 102119348A
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blooming
bonding agent
methyl
acrylate
weight
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CN102119348B (en
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竹厚流
金容演
许智惠
太田阳介
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Physics & Mathematics (AREA)
  • Adhesive Tapes (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)

Abstract

An adhesive layer (20) formed from a composition that contains (A), (B), and (C) is provided on an optical film (10) to produce an optical film with adhesive (25). (A) 100 parts by weight of an acrylic resin which is a copolymer of a monomer mixture that contains: (A-1) 55-94 wt% of a (meth)acrylic acid ester with formula (I) (I) (R1 is hydrogen or a methyl group, and R2 is a C1-14 alkyl or aralkyl), (A-2) 5-40 wt% of a (meth)acrylic acid ester having an alkoxyethyl group, such as acrylic acid 2-methoxyethyl, and (A-3) 0.1-5 wt% of an unsaturated monomer having a polar functional group. (B) 0.3-12 parts by weight of an ionic compound that has organic cations and is a solid at room temperature. (C) 0.1-5 parts by weight of a crosslinking agent.

Description

The blooming of band bonding agent and the optical laminate that uses it
Technical field
The present invention relates to a kind of blooming that is formed with adhesive phase.As the blooming that becomes object in the present invention, can enumerate for example polarization plates and phase retardation film.The invention still further relates to a kind of liquid crystal display optical laminate that uses this blooming that is formed with adhesive phase.
Background technology
Polarization plates is mounted on the liquid crystal indicator and is widely used, and it is with at the stacked transparent protective film in the two sides of polaroid, and form adhesive phase on the surface of at least one diaphragm, and pastes the state circulation of stripping film on this adhesive phase.In addition, also be pasted with stacked phase retardation film on the polarization plates under the state of diaphragm and make the elliptic polarization plate sometimes, and paste adhesive phase/stripping film in this phase retardation film side on the two sides of polaroid.And then, also can paste adhesive phase/peel ply sometimes on the surface of phase retardation film.Before liquid crystal cells is bonding, peels stripping film from these polarization plates, elliptic polarization plate, phase retardation film etc., and stick on the liquid crystal cells by the adhesive phase that exposes.Owing to such polarization plates, elliptic polarization plate or phase retardation film can produce static when pasting on the liquid crystal cells in that stripping film is peeled off, thereby wish that developing it prevents countermeasure.
As one of its countermeasure; a kind of surperficial stacked diaphragm at polarizer membrane has been proposed in Japanese kokai publication hei 6-313807 communique (patent documentation 1); and be provided with the polarization plates of adhesive phase on the surface of diaphragm; wherein, use comprise the ionic conductivity composition that constitutes by electrolytic salt and organopolysiloxane and acrylic acid series copolymer composition as bonding agent.By using this bonding agent, though shown antistatic behaviour, its performance may not be abundant, and can not say so and reached sufficient performance in bonding persistence aspect.
On the other hand, in Japanese Unexamined Patent Application Publication 2004-536940 communique (patent documentation 2), disclose the antistatic agent that in pressure adhesive (bonding agent), cooperates organic salt, and given antistatic behaviour this bonding agent.In addition, having put down in writing by comprising in bonding agent etc. by total carbon atom number in TOHKEMY 2004-114665 communique (patent documentation 3) is that the salt that 4～20 quaternary ammonium cation and the negative ion that contains fluorine atom form is given antistatic behaviour.And then, in TOHKEMY 2006-307238 communique (patent documentation 4), put down in writing to make to contain in the bonding agent under room temperature (25 ℃) and realized antistatic effect for the ionic liquid of liquid.In TOHKEMY 2006-16595 communique (patent documentation 5), put down in writing and a kind ofly comprised ionic liquid and contain the compound of oxirane and be the antistatic behaviour adhesive composition of the polymkeric substance below 0 ℃ as the glass temperature Tg of base polymer.But, will be coated with the disclosed bonding agent that is combined with ionic liquid forms in these documents polarization plates when placing for a long time, because of through the time change antistatic behaviour variation sometimes.The circulation of general polarization plates and holding time are 6 months from making beginning the longest, thus require before client uses during in to keep antistatic property.Especially in the liquid crystal cells of dull and stereotyped switch (In-Plane Switching:IPS) pattern, all require blooming to have high-antistatic under a lot of situations.
In addition, the blooming of aforesaid band bonding agent sticks on the liquid crystal cells with its adhesive phase side and makes liquid crystal indicator, but be positioned under high temperature or the hot and humid condition or when carrying out heating and cooling repeatedly with this state, sometimes be accompanied by the change in size of blooming, can produce foaming or heave or peel off etc. at adhesive phase in generation between blooming and the adhesive phase or between adhesive phase and liquid crystal cells glass, therefore, seek not take place this undesirable condition and permanance is good.And then, when exposing at high temperature, owing to act on the skewness of the residual stress of blooming, stress is concentrated in the peripheral part of blooming, thereby when black display, can produce phenomenon that is referred to as whiting or generation color spot that peripheral part turns white, therefore, also seek to suppress this whiting and color spot.And then, on liquid crystal cells, fit when being with the blooming of bonding agent, under situation about not posting, in case its blooming is peeled off, then need the new film of fitting again, therefore also seek re-workability, that is, adhesive phase is stripped from together along with blooming and can not residue in the unit on glass and do not produce stain etc. under above-mentioned situation about peeling off.
A kind of antistatic acrylic bonding agent that side chain has acrylic acid series copolymer, glass compound and the hardening agent of alkylene oxide chains such as hydroxyl and ethylene oxide chain that comprises is disclosed in TOHKEMY 2005-206776 communique (patent documentation 6).Yet the compound that uses in the patent documentation 6 only is the ionic compound with inorganic cation such as Li salt, and there is the problem with the intermiscibility difference of the base polymer of bonding agent in such ionic compound.
The prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication hei 6-313807 communique
Patent documentation 2: Japanese Unexamined Patent Application Publication 2004-536940 communique
Patent documentation 3: TOHKEMY 2004-114665 communique
Patent documentation 4: TOHKEMY 2006-307238 communique
Patent documentation 5: TOHKEMY 2006-16595 communique
Patent documentation 6: TOHKEMY 2005-206776 communique
Summary of the invention
Problem of the present invention is, a kind of high antistatic behaviour of giving is provided, and the surface at blooming that its antistatic behaviour does not change during The book of Changes, permanance is also excellent is provided with the blooming of the band bonding agent of adhesive phase.The inventor etc. have carried out wholwe-hearted research in order to solve above-mentioned problem, found that, be the ionic compound of solid and crosslinking chemical under the room temperature (25 ℃) by in specific acryl resin, being engaged in, and with said composition be arranged at blooming the surface and as adhesive phase, can obtain antistatic behaviour, antistatic behaviour through the time change and the blooming of the band bonding agent of excellent in te pins of durability, thereby finished the present invention.
Promptly, according to the present invention, a kind of blooming with bonding agent can be provided, it is characterized in that, be that at least one face at blooming forms adhesive phase and forms, wherein, described adhesive phase is formed by the adhesive composition of the C of the B of A that contains 100 weight portions and 0.3～12 weight portion and 0.1～5 weight portion
The serve as reasons acryl resin of the multipolymer that the monomer mixture of A-3 of the A-2 of the A-1, the 5-40 weight % that contain 55～94 weight % and 0.1～5 weight % obtains of described A,
Described B has organic cation and at room temperature is the ionic compound of solid,
Described C is a crosslinking chemical,
Described A-1 is (methyl) acrylate of following formula (I) expression,
Figure BPA00001309963200031
In the formula, R 1Expression hydrogen atom or methyl, R 2The expression carbon number is 1～14 alkyl or aralkyl,
Described A-2 is (methyl) acrylate (below, be sometimes referred to as " ether type (methyl) acrylate ") of following formula (II) expression,
Figure BPA00001309963200041
In the formula, R 3Expression hydrogen atom or methyl, R 4The expression carbon number is 1～8 alkyl, and n is 1～10 integer,
Described A-3 is the unsaturated monomer with polar functional group.
Find thus, as be used for to the adhesive phase that the adhesive composition by the specific acryl resin A that comprises the present invention regulation forms give antistatic behaviour and suppress this antistatic behaviour through the time antistatic agent that changes, use in room temperature (25 ℃) time effective especially as the ionic compound B of solid.
In addition, according to the present invention, also provide a kind of blooming of described band bonding agent to be laminated in the optical laminate that glass substrate forms with its adhesive phase side.
The invention effect
The blooming of band bonding agent of the present invention can effectively suppress the charged of optics.
And then, having organic cation and at room temperature be the ionic compound of solid by in adhesive composition, containing, the back is long-time preserves even make, and also can keep the antistatic property at initial stage.
In addition, owing to preventing, therefore, can suppress whiting by the inhomogeneous optical defect that causes of stress distribution.And then, after will being laminated on the glass substrate with the blooming first pass of bonding agent, occurring under the ill-considered situation of any applying, even this blooming is peeled off from glass substrate with bonding agent, also seldom produce cull and stain on the surface of the glass substrate after peeling off, can be used as glass substrate, re-workability excellence once more.
The blooming of this band bonding agent can provide a kind of liquid crystal display optical laminate by being laminated in for example glass substrate of liquid crystal cells.Because this optical laminate its adhesive phase under wet heat condition can absorb and relax by the caused stress of the change in size of blooming and glass substrate, therefore, can alleviate local stress concentration, heave and peel off etc. from glass substrate thereby can suppress adhesive phase.
Description of drawings
Fig. 1 is the schematic cross-section of preferred layer of example that constitutes of expression optical laminate of the present invention.
Embodiment
Below the present invention is described in detail.The blooming of band bonding agent of the present invention has formed adhesive phase at least one face of blooming, and described adhesive phase is by comprising that A acryl resin, B have organic cation and being that the ionic compound of solid and the composition of C crosslinking chemical form in room temperature.At first, each composition that constitutes adhesive composition is described.
[acryl resin A]
In the blooming of band bonding agent of the present invention, the structural unit of (methyl) acrylate shown in the self-ascending type (I) is a major component since the employed acryl resin A of adhesive phase, particularly, except that the structural unit that is somebody's turn to do from (methyl) acrylate, also comprise structural unit from ether type (methyl) acrylate of above-mentioned formula (II) expression; And from having free carboxy, hydroxyl, amino, be the monomer of the heterocyclic radical isopolarity functional group of representative with the epoxide ring, preferably have a structural unit of (methyl) acrylic acid series compound of polar functional group.At this, (methyl) acrylic acid is meant and can be in the acrylic or methacrylic acid any that " (methyl) " when in addition, being called (methyl) acrylate etc. also has identical implication.
In above-mentioned formula (I) as the primary structure unit of acryl resin A, R 1Be hydrogen atom or methyl, R 2For carbon number is 1～14 alkyl or aralkyl, is preferably alkyl.
Among (methyl) acrylate A-1 shown in the formula (I), as R 2(methyl) acrylate during for alkyl specifically can illustration: the straight chain shape alkyl acrylate of methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, acrylic acid n-octyl, lauryl acrylate and so on; A chain alkyl acrylate of isobutyl acrylate, 2-EHA, Isooctyl acrylate monomer and so on; The straight chain shape alkyl methacrylate of methyl methacrylate, Jia Jibingxisuanyizhi, propyl methacrylate, n-BMA, n octyl methacrylate, lauryl methacrylate and so on; A chain alkyl methacrylate of isobutyl methacrylate, methacrylic acid 2-Octyl Nitrite, EHMA and so on etc.As R 2(methyl) acrylate shown in the formula during for aralkyl (I) specifically can the illustration benzyl acrylate and benzyl methacrylate etc.These (methyl) acrylate A-1 can distinguish separately and to use, and also can use the different multiple copolymerization of carrying out.
Wherein, preferred n-butyl acrylate particularly, in all monomers that constitute acryl resin A, is more than the 50 weight % with n-butyl acrylate preferably and the mode that satisfies the relevant regulations of above-mentioned (methyl) acrylate A-1 is used.
Ether type (methyl) acrylate of A-2 is represented with above-mentioned formula (II).As ether type (methyl) the acrylate A-2 shown in the formula (II), specifically can illustration: acrylic acid 2-methoxyl ethyl ester, acrylic acid 2-ethoxy ethyl ester, acrylic acid 2-methoxyl-2-ethoxy ethyl ester, methacrylic acid 2-methoxyl ethyl ester, methacrylic acid 2-ethoxy ethyl ester, methacrylic acid 2-methoxyl-2-ethoxy ethyl ester etc.These ether type (methyl) acrylate A-2 can use separately, also can use the different multiple copolymerization of carrying out.
Wherein, preferably use a kind of as among (methyl) acrylate A-2 that constitutes acryl resin A of acrylic acid 2-methoxyl ethyl ester.
As the example of the unsaturated monomer A-3 with polar functional group, can enumerate: the monomer with free carboxy of acrylic acid, methacrylic acid, β-propyloic acrylic ester and so on; The monomer with hydroxyl of (methyl) acrylic acid 2-hydroxy methacrylate, (methyl) acrylic acid 2-hydroxy propyl ester, (methyl) acrylic acid 2-or 3-chloro-2-hydroxy propyl ester, diethylene glycol list (methyl) acrylate and so on; Acryloyl morpholine, caprolactam, N-vinyl-2-Pyrrolidone, (methyl) tetrahydrofurfuryl acrylate, caprolactone modification tetrahydrofurfuryl acrylate, 3,4-epoxycyclohexyl methyl (methyl) acrylate, (methyl) glycidyl acrylate, 2, the monomer with heterocyclic radical of 5-dihydrofuran and so on; N, the unsaturated monomer with amino different of N-dimethyl aminoethyl (methyl) acrylate and so on etc. with heterocycle.These unsaturated monomers with polar functional group can be distinguished separately and to use, and also can use different multiple.
Wherein, the polar functional group of unsaturated monomer A-3 is preferably free carboxy, hydroxyl, amino or epoxide ring.Preferably especially use a kind of as in the monomer A that contains polar functional group-3 that constitutes acryl resin A of monomer with hydroxyl.In addition, except use has the monomer of hydroxyl, and the monomer that with the monomer with other polar functional group, for example has a free carboxy also is effective.
The acryl resin A that is used for adhesive phase is the multipolymer that the monomer mixture by the unsaturated monomer A-3 with polar functional group of ether type (methyl) the acrylate A-2 of above-mentioned formula (II) expression of (methyl) acrylate A-1,5～40 weight % of above-mentioned formula (I) expression that contains 55～94 weight % and 0.1～5 weight % obtains.In this multipolymer, preferably the structural unit from (methyl) acrylate A-1 of formula (I) expression is 70～94 weight % and then preferred 72～94 weight %; Structural unit from ether type (methyl) the acrylate A-2 of formula (II) expression is 7～25 weight %; And be 0.5～3 weight % from the structural unit of the unsaturated monomer A-3 with polar functional group.
The acryl resin A that the present invention uses can comprise the formula (I) from above explanation (methyl) acrylate, formula (II) ether type (methyl) acrylate and contain the structural unit of the monomer beyond the unsaturated monomer of polar functional group.As their example, can enumerate: from the structural unit of (methyl) acrylate that has the ester ring type structure in the molecule, from the structural unit of styrenic monomers, from the structural unit of vinyl monomer, from structural unit of the monomer that has a plurality of (methyl) acryloyl group in the molecule etc.
So-called ester ring type structure is meant that carbon number is generally more than 5, is preferably the naphthenic hydrocarbon structure about 5～7.Concrete example as acrylate with ester ring type structure, can enumerate: isobornyl acrylate, cyclohexyl acrylate, acrylic acid two ring pentyl esters, acrylic acid cyclo-dodecyl ester, acrylic acid methyl cyclohexane ester, acrylic acid 3-methyl cyclohexanol ester, acrylic acid tert-butyl group cyclohexyl, α-ethoxy-c olefin(e) acid cyclohexyl, acrylic acid cyclohexyl phenyl ester etc., as the concrete example of methacrylate, can enumerate: isobornyl methacrylate with ester ring type structure, cyclohexyl methacrylate, methacrylic acid two ring pentyl esters, methacrylic acid cyclo-dodecyl ester, the own ester of trimethyl cyclohexyl methacrylate, methacrylic acid 3-methyl cyclohexanol ester, methacrylic acid tert-butyl group cyclohexyl, methacrylic acid cyclohexyl phenyl ester etc.
Example as styrenic monomers, except that styrene, can also enumerate: the ring-alkylated styrenes of methyl styrene, dimethyl styrene, trimethylbenzene ethene, ethyl styrene, diethylbenzene ethene, triethylbenzene ethene, propylstyrene, butylstyrene, hexyl benzene ethene, heptyl benzene ethene, octyl group styrene and so on; The halogenated styrenes of fluorobenzene ethene, chlorostyrene, bromstyrol, Dowspray 9, iodobenzene ethene and so on; And nitrostyrolene, acetylbenzene ethene, methoxy styrene, divinylbenzene etc.
As the example of vinyl monomer, can enumerate: the fatty acid vinyl ester of vinyl acetate, propionate, vinyl butyrate, 2 ethyl hexanoic acid vinyl acetate, vinyl laurate and so on; The ethylene halide of vinyl chloride and bromine ethene and so on; The inferior ethene of the halogenation of vinylidene chloride and so on; The nitrogenous aromatic vinyl of vinylpyridine, vinyl pyrrolidone, vinylcarbazole and so on; The conjugate diene monomer of butadiene, isoprene, chlorbutadiene and so on; And vinyl cyanide, methacrylonitrile etc.
Example as the monomer that has a plurality of (methyl) acryloyl group in the molecule, can enumerate: 1,4-butylene glycol two (methyl) acrylate, 1,6-hexanediol two (methyl) acrylate, 1 has the monomer of 2 (methyl) acryloyl groups in the molecule of 9-nonanediol two (methyl) acrylate, ethylene glycol bisthioglycolate (methyl) acrylate, diethylene glycol two (methyl) acrylate, TEG two (methyl) acrylate, tripropylene glycol two (methyl) acrylate and so on; Has the monomer of 3 (methyl) acryloyl groups etc. in the molecule of trimethylolpropane tris (methyl) acrylate and so on.
(methyl) acrylate of formula (I), ether type (methyl) acrylate of formula (II) and have monomer beyond the unsaturated monomer of polar functional group and can distinguish separately and use also can be used in combination more than 2 kinds.In the employed acryl resin A of bonding agent, from ether type (methyl) acrylate of (methyl) acrylate of formula (I), formula (II) and have the structural unit of the monomer beyond the monomer of polar functional group, with nonvolatile component 100 weight portions with respect to described resin be generally 0～20 weight portion, the ratio that is preferably 0～10 weight portion contains.
The effective constituent of bonding agent can comprise ether type (methyl) acrylate of (methyl) acrylate of containing more than 2 kinds from aforesaid formula (I), formula (II) and have the acryl resin of structural unit of the monomer of polar functional group.And then, in the aforesaid propylene acid resin, can mix the acryl resin different with it, particularly, for example can mix and have from the structural unit of (methyl) acrylate of formula (I) and do not contain acryl resin of polar functional group etc.Be major component and comprise acryl resin with structural unit, in whole acryl resins, be more than the 60 weight % preferably and then be preferably more than the 80 weight % from the structural unit of monomer with polar functional group from (methyl) acrylate of formula (I).
As by ether type (methyl) acrylate of (methyl) acrylate that comprises formula (I), formula (II) and have the acryl resin of the multipolymer that the monomer mixture of the monomer of polar functional group obtains, the weight-average molecular weight (Mw) that converts with polystyrene standard that is preferably based on that gel permeation chromatography (GPC) measures is in 1,000,000～2,000,000 scope.The weight-average molecular weight that converts with polystyrene standard is 1,000,000 when above, because the cementability under hot and humid increases, the possibility of heaving between glass substrate and adhesive phase and peeling off has the tendency of reduction, and re-workability has the tendency of raising, thereby preferred.In addition, this weight-average molecular weight is 2,000,000 when following, even being pasted on the size of the blooming of described adhesive phase changes, adhesive phase can not followed its change in size yet and be changed, therefore, do not have difference between the brightness of the edge part of liquid crystal cells and the brightness of central part, the tendency that suppresses whiting and color spot is arranged, thus preferred.Molecular weight distribution shown in the ratio (Mw/Mn) of weight-average molecular weight (Mw) and number-average molecular weight (Mn) is usually in the scope about 2～10.
In addition, in order to present cohesive, preferred its glass temperature of aforesaid propylene acid resin A is in-10～-60 ℃ scope.The glass temperature of resin can utilize differential scanning calorimeter to measure usually.
This acryl resin can only be made of the higher resin of aforesaid molecular weight, also can be made of the potpourri of aforesaid propylene acid resin and the acryl resin different with it.As the acryl resin that can mix use, for example can enumerate: with the structural unit from (methyl) acrylate shown in the above-mentioned formula (I) is major component and the acryl resin of weight-average molecular weight in 50,000～300,000 scope.
Acryl resin (combination more than 2 kinds time be the potpourri of the two), preferably it is dissolved in the ethyl acetate and the concentration of the making nonvolatile component solution when being 20 weight % at 25 ℃ down below the demonstration 20Pas and then the viscosity of 0.1～7Pas.The viscosity of this moment is 20Pas when following, because hot and humid following cementability increases, generation is heaved and the possibility peeled off has the tendency of reduction between glass substrate and adhesive phase, and re-workability has the tendency of raising, thereby preferably.Viscosity can be utilized rich power to fly (Brookfield) viscosity meter and measure.
The acryl resin that constitutes adhesive phase for example can utilize known the whole bag of tricks such as solution polymerization process, emulsion polymerization, mass polymerization, suspension polymerization to make.In the manufacturing of this acryl resin, use polymerization initiator usually.Total 100 weight portions of the whole monomers that use in the manufacturing of the use amount of polymerization initiator with respect to acryl resin are about 0.001～5 weight portion.
As polymerization initiator, use thermal polymerization and Photoepolymerizationinitiater initiater etc.As Photoepolymerizationinitiater initiater, for example can enumerate: 4-(2-hydroxyl-oxethyl) phenyl (2-hydroxyl-2-propyl group) ketone etc.As thermal polymerization, for example can enumerate: 2,2 '-azobis isobutyronitrile, 2,2 '-azo two (2-methylbutyronitrile), 1,1 '-azo two (cyclohexane-1-nitrile), 2,2 '-azo two (2,2,2 the 4-methyl pentane nitrile), '-azo two (2,4-dimethyl-4-methoxyl valeronitrile), dimethyl-2,2 '-azo two (2 Methylpropionic acid esters), 2,2 '-the azo based compound of azo two (2-hydroxymethyl propionitrile) and so on; Lauryl peroxide, tert-butyl hydroperoxide, benzoyl peroxide, peroxidized t-butyl perbenzoate, cumene hydroperoxide hydrogen, di-isopropyl peroxydicarbonate, peroxy dicarbonate di-n-propyl ester, new peroxide tert-butyl caprate, the peroxidating neopentanoic acid tert-butyl ester, (3,5,5-trimethyl acetyl base) organic peroxide of superoxide and so on; The inorganic peroxide of potassium persulfate, ammonium persulfate, hydrogen peroxide and so on etc.Also can be used as polymerization initiator in addition, and with redox series initiators of superoxide and reductive agent etc.
As the manufacture method of acryl resin, the solution polymerization process in the method shown in preferred above.When the concrete example of enumerating solution polymerization process describes, can enumerate: desirable monomer and organic solvent are mixed, and under blanket of nitrogen, add thermal polymerization, about 40～90 ℃, be preferably the method that stirs 3～10 hours under the temperature about 60～80 ℃ etc.In addition,, in polymerization process, add monomer or thermal polymerization serially or off and on, or add monomer or thermal polymerization with the state that is dissolved in organic solvent in order to control reaction.At this,, for example can use: toluene, dimethylbenzene and so on aromatic hydrocarbon based as organic solvent; The ester class of ethyl acetate, butyl acetate and so on; The aliphatics alcohols of propyl alcohol, isopropyl alcohol and so on; The ketone of acetone, methyl ethyl ketone, methyl isobutyl ketone and so on etc.
[ionic compound B]
Among the present invention, except using above-described acryl resin A, also use in room temperature (25 ℃) down to the ionic compound B of solid as antistatic agent.Described ionic compound B has organic cation.In this manual, also this at room temperature is called ionic solid for the ionic compound of solid sometimes.
Constitute the cation constituent of ionic compound B as long as, be not particularly limited in addition for satisfying the organic cation that forms ionic solid.Can enumerate: for example glyoxaline cation, pyridylium, ammonium cation, sulfonium cation, phosphonium cation etc., when being used for the adhesive phase of blooming, be difficult for charged viewpoint when thereon stripping film is peeled off and consider preferred pyridylium and glyoxaline cation from being provided with.
On the other hand, in ionic compound B, the anion component that becomes the counter ion counterionsl gegenions of above-mentioned cation constituent needs only the condition that satisfies the ionic solid of formation and just is not particularly limited, and can be inorganic anion, also organic anion can be, for example following ion can be enumerated.
Cl anion (Cl -),
Bromine anions (Br -),
Iodine negative ion (I -),
Tetrachloro aluminic acid negative ion (AlCl 4 -),
Heptachlor dichloro acid negative ion (Al 2Cl 7 -),
Tetrafluoro boric acid negative ion (BF 4 -),
Hexafluorophosphoric acid negative ion (PF 6 -),
Perchloric acid negative ion (ClO 4 -),
Nitric acid negative ion (NO 3 -),
Acetate anion (CH 3COO -),
Trifluoracetic acid negative ion (CF 3COO -),
Loprazolam negative ion (CH 3SO 3 -),
Trifluoromethayl sulfonic acid negative ion (CF 3SO 3 -),
P-toluenesulfonic acid negative ion (p-CH 3C 6H 4SO 3 -),
Two (trifluoromethane sulfonyl group) acid imide negative ion ((CF 3SO 2) 2N -),
Three (trifluoromethane sulfonyl group) methane negative ion ((CF 3SO 2) 3C -),
Hexafluoroarsenate negative ion (AsF 6 -),
Hexafluoro-antimonic acid negative ion (SbF 6 -),
Hexafluoro niobic acid negative ion (NbF 6 -),
Hexafluoro tantalic acid negative ion (TaF 6 -),
Dimethyl hypophosphorous acid negative ion ((CH 3) 2POO -),
(gathering) hydrofluorite fluoride anion (F (HF) n -) (n is about 1～3),
Dicyanamide anion (dca) ((CN) 2N -),
Sulphur cyanogen negative ion (SCN -),
Perfluorinated butane sulfonic acid anion (C 4F 9SO 3 -),
Two (pentafluoroethane sulfonyl) acid imide negative ion ((C 2F 5SO 2) 2N -),
Perfluorobutyric acid negative ion (C 3F 7COO -),
(trifluoromethane sulfonyl group) (fluoroform carbonyl) acid imide negative ion ((CF 3SO 2) (CF 3CO) N -) etc.
Wherein, the anion component that contains fluorine atom is preferred the use from the ionic solid consideration that can obtain the antistatic property excellence, preferred especially hexafluorophosphoric acid negative ion or two (trifluoromethane sulfonyl group) acid imide negative ion.
The concrete example of the ionic solid that the present invention uses can suitably be selected from the combination of above-mentioned cation constituent and anion component.As the compound of the combination of concrete cation constituent and anion component, can enumerate following compound.
N-hexyl pyridine hexafluorophosphate,
N-octyl group pyridine hexafluorophosphate,
N-butyl-4-picoline hexafluorophosphate,
N-octyl group-4-picoline hexafluorophosphate,
N-butyl-N-crassitude hexafluorophosphate,
1-ethyl-3-methylimidazole hexafluorophosphate,
1-ethyl-3-methylimidazole tosilate,
1-butyl-3-methylimidazole methane sulfonates,
The TBuA hexafluorophosphate,
The TBuA tosilate,
Two (trifluoromethane sulfonyl group) acid imides of tributyl-methyl phosphonium ammonium,
(2-hydroxyethyl) trimethyl ammonium dimethyl phosphite etc.
Ionic solid like this can be distinguished use separately, also can make up more than 2 kinds and use.The example of ionic solid is not limited to the above material of enumerating.
Being the ionic compound B of solid under the room temperature, as mentioned above, is effective the adhesive phase that is formed by the composition that comprises acryl resin A being given antistatic behaviour and being kept aspect the various rerum naturas of bonding agent.Particularly compare, can keep antistatic property for a long time with using at normal temperatures situation as the ionic compound of liquid.Consider that from the viewpoint of the long-time stability of such antistatic behaviour ionic compound B preferably has more than 30 ℃ and then the fusing point more than 35 ℃.On the other hand, when its fusing point is too high,, therefore, preferably have below 90 ℃ and then the fusing point below 80 ℃ with the intermiscibility variation of acryl resin A.There is no particular limitation for the molecular weight of ionic compound B, and for example preferred molecular weight is below 700 and then is preferably below 500.
With nonvolatile component 100 weight portions with respect to aforesaid propylene acid resin A is that the ratio of 0.3～12 weight portion contains ionic compound B.With respect to nonvolatile component 100 weight portions of acryl resin A, contain ionic compound B0.3 weight portion when above, antistatic property improves, thereby preferred.In addition, its amount is 12 weight portions when following, keeps permanance easily, thereby preferred.With respect to nonvolatile component 100 weight portions of acryl resin A, the amount of ionic compound B is preferably more than 0.5 weight portion and below 5 weight portions.
[crosslinking chemical C]
In above-described acryl resin A and ionic compound B, further cooperate crosslinking chemical C to make adhesive composition.Crosslinking chemical C in molecule, have at least 2 can with acryl resin A in particularly from the compound of the crosslinked functional group of the structural unit of the unsaturated monomer A-3 with polar functional group, specifically can illustration: isocyanates based compound, epoxy based compound, metal complex based compound, aziridine based compound etc.
(for example can enumerate: toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, Xylene Diisocyanate, hydrogenated xylene diisocyanate, methyl diphenylene diisocyanate, hydrogenated diphenyl methane diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate etc. by compound NCO) in order to have at least 2 isocyanate bases in molecule for the isocyanates based compound.In addition, make the resulting adduct of polyol reactions such as these isocyanate compounds and glycerine or trimethylolpropane, and the dimer of isocyanate compound, tripolymer etc. also can be with the crosslinking chemical that acts on bonding agent.Can also mix isocyanates based compound use more than 2 kinds.
The compound of epoxy based compound in molecule, having at least 2 epoxy radicals, for example can enumerate: bisphenol A type epoxy resin, ethylene glycol bisthioglycolate glycidyl ether, polyglycol diglycidyl ether, glycerine diglycidyl ether, glycerine triglycidyl group ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane tris glycidyl ether, N, N-diglycidylaniline, N, N, N ', N '-four glycidyl group m-xylene diamine, 1, two (N, N-diglycidyl amino methyl) cyclohexanes of 3-etc.Also can be mixed with two or more the epoxy based compound.
As the metal complex compounds, for example can enumerate: compound of coordination diacetone or ethyl acetoacetate etc. on polyvalent metals such as aluminium, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium and zirconium.
The aziridine based compound also is referred to as aziridine (ethylene imine), be in molecule, to have at least 2 by 1 nitrogen-atoms and 23 yuan of compounds that encircle skeletons that carbon atom constitutes, for example can enumerate: diphenyl methane-4,4 '-two (1-aziridine formamides), Toluene-2,4-diisocyanate, 4-two (1-aziridine formamide), the triethylene melamine, between phenyl-diformyl two-1-(2-methylaziridine), three-1-aziridine phosphine oxide, hexa-methylene-1,6-two (1-aziridine acid amides), trimethylolpropane-three-β-'-aziridino propionic ester, tetramethylol methane-three-β-'-aziridino propionic ester etc.
In these crosslinking chemicals, preferably use isocyanates based compound, particularly Xylene Diisocyanate, toluene diisocyanate or hexamethylene diisocyanate; Or the adduct of these isocyanate compounds and polyol reaction gained such as glycerine or trimethylolpropane; The dimer of isocyanate compound, tripolymer etc.; The potpourri of these isocyanates based compounds etc.The unsaturated monomer A-3 that contains polar functional group is when having the polar functional group that is selected from free carboxy, hydroxyl, amino and epoxide ring, and preferred especially at least a crosslinking chemical C uses the isocyanates based compound.As preferred isocyanates based compound, can enumerate: the adduct of toluene diisocyanate, toluene diisocyanate and polyol reaction gained; The dimer of toluene diisocyanate, and the tripolymer of toluene diisocyanate; And the adduct of hexamethylene diisocyanate, hexamethylene diisocyanate and polyol reaction gained; The dimer of hexamethylene diisocyanate, and the tripolymer of hexamethylene diisocyanate.
Crosslinking chemical C is preferably the ratio about 0.2～3 weight portion to be the ratio cooperation of 0.1～5 weight portion with respect to acryl resin A 100 weight portions.With respect to the amount of acryl resin A 100 parts by weight of cross-linking agent C is 0.1 weight portion when above, and the permanance of adhesive phase is tended to improve, and is therefore preferred, in addition, be 5 weight portions when following, whiting became not obvious when the blooming of band bonding agent was applied to liquid crystal indicator, and is therefore preferred.
[constituting other composition of adhesive composition]
In the adhesive composition that is used to form adhesive phase of the present invention, in order to improve the adaptation between adhesive phase and the glass substrate, preferably contain silane based compound (D), contain silane based compound (D) particularly preferably in cooperating in the crosslinking chemical acryl resin before.
As silane based compound (D), can enumerate: vinyltrimethoxy silane, vinyltriethoxysilane, vinyl three (2-methoxy ethoxy) silane, N-(2-amino-ethyl)-3-aminopropyl methyl dimethoxysilane, N-(2-amino-ethyl)-3-TSL 8330, the 3-aminopropyltriethoxywerene werene, the 3-glycidoxypropyltrime,hoxysilane, 3-glycidoxy propyl group methyl dimethoxysilane, 2-(3, the 4-epoxycyclohexyl) ethyl trimethoxy silane, the 3-chloropropylmethyldimethoxysilane, the 3-r-chloropropyl trimethoxyl silane, the 3-methacryloxypropyl trimethoxy silane, the 3-mercaptopropyl trimethoxysilane, the 3-glycidoxypropyltrime,hoxysilane, 3-glycidoxy propyl-triethoxysilicane, 3-glycidoxy propyl group dimethoxy-methyl silane, 3-glycidoxy propyl group ethoxy dimethylsilane etc.Can use silane based compound (D) more than 2 kinds.
Silane based compound (D) can be the silane based compound of silicone oligomeric.When representing the silicone oligomer, can enumerate for example following compound with the form of multipolymer.
3-mercaptopropyl trimethoxysilane-tetramethoxy-silicane alkyl copolymer,
3-mercaptopropyl trimethoxysilane-tetraethoxy-silicane alkyl copolymer,
3-mercaptopropyltriethoxysilane-tetramethoxy-silicane alkyl copolymer,
The multipolymer that contains the mercapto propyl group of 3-mercaptopropyltriethoxysilane-tetraethoxy-silicane alkyl copolymer and so on;
Thiopurine methyltransferase trimethoxy silane-tetramethoxy-silicane alkyl copolymer,
Thiopurine methyltransferase trimethoxy silane-tetraethoxy-silicane alkyl copolymer,
Thiopurine methyltransferase triethoxysilane-tetramethoxy-silicane alkyl copolymer,
The multipolymer that contains thiopurine methyltransferase of thiopurine methyltransferase triethoxysilane-tetraethoxy-silicane alkyl copolymer and so on;
3-methacryloxypropyl trimethoxy silane-tetramethoxy-silicane alkyl copolymer,
3-methacryloxypropyl trimethoxy silane-tetraethoxy-silicane alkyl copolymer,
3-methacryloxypropyl triethoxysilane-tetramethoxy-silicane alkyl copolymer,
3-methacryloxypropyl triethoxysilane-tetraethoxy-silicane alkyl copolymer,
3-methacryloxypropyl methyl dimethoxysilane-tetramethoxy-silicane alkyl copolymer,
3-methacryloxypropyl methyl dimethoxysilane-tetraethoxy-silicane alkyl copolymer,
3-methacryloxypropyl methyldiethoxysilane-tetramethoxy-silicane alkyl copolymer,
The multipolymer that contains methacryloxypropyl of 3-methacryloxypropyl methyldiethoxysilane-tetraethoxy-silicane alkyl copolymer and so on;
3-acryloxy propyl trimethoxy silicane-tetramethoxy-silicane alkyl copolymer,
3-acryloxy propyl trimethoxy silicane-tetraethoxy-silicane alkyl copolymer,
3-acryloxy propyl-triethoxysilicane-tetramethoxy-silicane alkyl copolymer,
3-acryloxy propyl-triethoxysilicane-tetraethoxy-silicane alkyl copolymer,
3-acryloxy propyl group methyl dimethoxysilane-tetramethoxy-silicane alkyl copolymer,
3-acryloxy propyl group methyl dimethoxysilane-tetraethoxy-silicane alkyl copolymer,
3-acryloxy propyl group methyldiethoxysilane-tetramethoxy-silicane alkyl copolymer,
The multipolymer that contains the acryloxy propyl group of 3-acryloxy propyl group methyldiethoxysilane-tetraethoxy-silicane alkyl copolymer and so on;
Vinyltrimethoxy silane-tetramethoxy-silicane alkyl copolymer,
Vinyltrimethoxy silane-tetraethoxy-silicane alkyl copolymer,
Vinyltriethoxysilane-tetramethoxy-silicane alkyl copolymer,
Vinyltriethoxysilane-tetraethoxy-silicane alkyl copolymer,
Vinyl methyl dimethoxysilane-tetramethoxy-silicane alkyl copolymer,
Vinyl methyl dimethoxysilane-tetraethoxy-silicane alkyl copolymer,
Vinyl methyldiethoxysilane-tetramethoxy-silicane alkyl copolymer,
The multipolymer that contains vinyl of vinyl methyldiethoxysilane-tetraethoxy-silicane alkyl copolymer and so on;
3-TSL 8330-tetramethoxy-silicane alkyl copolymer,
3-TSL 8330-tetraethoxy-silicane alkyl copolymer,
3-aminopropyltriethoxywerene werene-tetramethoxy-silicane alkyl copolymer,
3-aminopropyltriethoxywerene werene-tetraethoxy-silicane alkyl copolymer,
3-aminopropyl methyl dimethoxysilane-tetramethoxy-silicane alkyl copolymer,
3-aminopropyl methyl dimethoxysilane-tetraethoxy-silicane alkyl copolymer,
3-aminopropyl methyldiethoxysilane-tetramethoxy-silicane alkyl copolymer,
The multipolymer that contains amino of 3-aminopropyl methyldiethoxysilane-tetraethoxy-silicane alkyl copolymer and so on etc.
These silane based compounds (D) in most cases are liquid.The use level of the silane based compound in the adhesive composition is generally about 0.01～10 weight portion with respect to nonvolatile component 100 weight portions (use under the situation more than 2 kinds and add up to weight for it) of acryl resin A, is preferably 0.03～1 weight portion.With respect to the amount of the silane based compound of nonvolatile component 100 weight portions of acryl resin is more than 0.01 weight portion, in particular for 0.03 weight portion when above, can improve the adaptation of adhesive phase and glass substrate, therefore preferred.In addition, its amount be 10 weight portions following,, have and suppress the tendency that the silane based compound oozes out from adhesive phase when following in particular for 1 weight portion, therefore preferred.
In the adhesive composition of above explanation, can further cooperate crosslinking catalyst, weather-proof stabilizing agent, tackifier, plastifier, softening agent, dyestuff, pigment, inorganic filler, acryl resin A resin in addition etc.In addition, in adhesive composition, cooperate ultra-violet solidified compound, and to be formed on behind the adhesive phase that irradiation ultraviolet radiation makes its curing and make harder adhesive phase also be effective.Wherein, if in adhesive composition, cooperate crosslinking chemical and crosslinking catalyst simultaneously, then the slaking by the short time can prepare adhesive phase, and can suppress in the resulting band adhesive resin film to produce between resin molding and adhesive phase and heave or peel off or foam in adhesive phase, re-workability is also better sometimes.As crosslinking catalyst, for example can enumerate: the aminated compounds of hexamethylene diamine, ethylenediamine, polyethyleneimine, hexamethylene tetramine, diethylene triamine, trien, isophorone diamine, trimethylene diamines, poly-amino resins, melamine resin and so on etc.When in adhesive composition, cooperating the aminated compounds as crosslinking catalyst, as crosslinking chemical, the preferred isocyanate compounds.
Above-mentioned each composition that constitutes adhesive composition is coated on the suitable base material and makes its drying being dissolved under the state of solvent, and makes adhesive phase.
[blooming of band bonding agent]
The blooming of band bonding agent of the present invention is provided with the adhesive phase that is formed by aforesaid adhesive composition in the one side at least of blooming.Blooming used herein is the film with optical characteristics, for example can enumerate polarization plates, phase retardation film etc.
So-called polarization plates is for having the blooming that sends the polarized light function with respect to incident lights such as natural lights.Polarization plates comprises: the linear polarization plate, and it has the linearly polarized photon that absorbs the vibration plane with certain direction and the feature of the perpendicular linearly polarized photon of transmission vibration plane; Polarized light separation membrane, it has the linearly polarized photon of vibration plane that reflection has certain direction, and the feature of the perpendicular linearly polarized photon of transmission vibration plane; With the elliptic polarization plate, polarization plates and following phase retardation film are laminated.As polarization plates, the particularly linear polarization plate preferred concrete example of (being called as polaroid or polarizer membrane sometimes), can be set forth in the polarization plates that absorption orientation in the polyvinyl alcohol resin film of uniaxial tension has dichromatism pigments such as iodine or dichroic dye.
So-called phase retardation film is meant the anisotropic blooming of display optical, for example can enumerate: by being stretched to the stretched film that obtains about 1.01～6 times etc. by the polymeric membrane that polyvinyl alcohol (PVA), polycarbonate, polyester, polyarylate, polyimide, polyolefin, cyclic polyolefin, polystyrene, polysulfones, polyethersulfone, Kynoar/polymethylmethacrylate, liquid crystal polyester, cellulose acetate, ethylene-vinyl acetate copolymer saponated material, Polyvinylchloride etc. form.Wherein, the polymeric membrane that forms of preferred uniaxial tension or biaxial stretch-formed polycarbonate membrane or cyclic polyolefin mesentery.The film that is referred to as single shaft phase retardation film, wide viewing angle phase retardation film, low light elastic modulus phase retardation film etc. is also arranged, all applicable.
In addition, utilize coating, the orientation of liquid crystal compounds to present optically anisotropic film or utilize the coating of inorganic layered compounds to present optically anisotropic film and also can be used as phase retardation film.This phase retardation film has the film of the rod shaped liquid crystal twisted-oriented of being sold with the trade name of " LC film " by Shin Nihon Oil Co., Ltd that is referred to as the temperature compensating type phase retardation film, equally by the film of Shin Nihon Oil Co., Ltd with the rod shaped liquid crystal tilted alignment of the trade name sale of " NH film ", the film that the discoid liquid crystal tilted alignment of being sold with the trade name of " WV film " by Fuji Photo Film Co., Ltd. becomes, by the film of Sumitomo Chemical Co with the complete biaxial orienting type of the trade name sale of " VAC film ", the film of the biaxial orienting type of selling with the trade name of " newVAC film " by Sumitomo Chemical Co etc. equally.
And then the film that is pasted with diaphragm on these bloomings also can be used as blooming.As diaphragm; adopt transparent resin molding; as this transparent resin, for example can enumerate with Triafol T or cellulose diacetate and be the acetate fiber prime system resin of representative, be methacrylic resin, vibrin, polyolefin-based resins, polycarbonate resin, polyether-ether-ketone resin, polysulfone resin of representative etc. with the polymethylmethacrylate.Can in the resin that constitutes diaphragm, cooperate ultraviolet light absorbers such as salicylate based compound, benzophenone based compound, benzotriazole based compound, triazine based compound, acrylic acid cyano group ester based compound, nickel complex salt compounds.As diaphragm, preferably use cellulose acetate resin films such as three cellulose acetate membrane.
In the blooming of above explanation, the linear polarization plate uses with the state that the one or both sides at the polaroid that constitutes the linear polarization plate, the polarizer membrane that for example is made of polyvinyl alcohol resin are pasted with diaphragm mostly.In addition, the polarization plates of above-mentioned elliptic polarization plate linear polarization plate that has been stacked and phase retardation film, this polarization plates one or both sides that also are in polarizer membrane have mostly been pasted the state of diaphragm.When on this elliptic polarization plate, forming adhesive phase of the present invention, form adhesive phase in its phase retardation film side usually.
The blooming of band bonding agent is preferably pasted stripping film on the surface of its adhesive phase, is used to protect the surface of adhesive phase before using.The blooming that is provided with the band bonding agent of stripping film like this can be made by for example following method: the above-mentioned adhesive composition of coating forms adhesive phase on stripping film, the method for further laminated optical film on the adhesive phase that obtains; The coating adhesive composition forms adhesive phase on blooming, and the applying stripping film is protected on its bonding agent face then, thereby obtain with the method for the blooming of bonding agent etc.Stripping film used herein for example can for the film that constitutes by various resins such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyarylates as base material, the demoulding that silicone-treated and so on is implemented on composition surface this base material and adhesive phase is handled and the film that obtains etc. again.
The thickness of adhesive phase is not particularly limited, and preferably is generally below the 30 μ m, also is preferably more than the 10 μ m, more preferably 10～20 μ m.The thickness of adhesive phase is that 30 μ m are when following, cementability under hot and humid improves, between glass substrate and adhesive phase, produce the possibility of heaving or peeling off and tend to step-down, and re-workability tends to improve, thereby it is preferred, in addition, its thickness is that 10 μ m are when above, even pasting the size of blooming thereon changes, bonding coat also can change along with this change in size, therefore, does not have difference between the brightness of the edge part of liquid crystal cells and the brightness of central part, the tendency that suppresses whiting or color spot is arranged, therefore preferred.At present, the standard of thickness that is pasted on the adhesive phase of liquid crystal cells glass is generally 25 μ m, in the present invention, even be below the 20 μ m with this thickness setting, also can bring into play the performance as adhesive phase fully.
The blooming of band bonding agent of the present invention is pasted on glass substrate and after forming optical laminate, exist any imappropriate and with this blooming when glass substrate is peeled off, adhesive phase is followed blooming and is stripped from, surface at the glass substrate that joins with adhesive phase produces stain or cull etc. hardly, therefore, paste the blooming of being with bonding agent more again on the glass substrate after peeling off easily.That is so-called re-workability excellence.
[optical laminate]
The blooming of band bonding agent of the present invention is laminated on the glass substrate with its adhesive phase, can be made into optical laminate.In the time will making optical laminate in glass substrate with the blooming of bonding agent is stacked, for example, as long as peel stripping film from the blooming of the above-mentioned band bonding agent that obtains, the surface that the adhesive phase that will expose is bonded in glass substrate gets final product.At this,, for example can enumerate as glass substrate: the glass substrate of liquid crystal cells, anti-dazzle with glass, sunglasses with glass etc.Wherein, the blooming (upper deflection board) of stacked band bonding agent on the glass substrate of the front face side (identification side) of liquid crystal cells, the optical laminate that the blooming (lower polarizing plate) of stacked other band bonding agent forms on the glass substrate of the rear side of liquid crystal cells can be with the panel that acts on liquid crystal indicator (liquid crystal panel) again, thereby preferred.As the material of glass substrate, for example can enumerate: soda-lime glass, glass with lower alkali content, alkali-free glass etc.
For optical laminate of the present invention, the example that several preferred layers are constituted is shown in Fig. 1 with schematic cross-section.In the example shown in Fig. 1 (A), the diaphragm 3 that will have a surface-treated layer 2 sticks on a face of linear polarization membrane 1 with the face that is in opposition side with described surface-treated layer 2, constitutes polarization plates 5.In this embodiment, polarization plates 5 becomes the blooming 10 described in the present invention simultaneously.Being on the face of opposition side of linear polarization membrane 1 the above-mentioned adhesive phase that comprises ionic compound 20 is set, constitutes the blooming 25 of band bonding agent with diaphragm 3.And, the face that is in opposition side with polarization plates 5 of described adhesive phase 20 is sticked on the liquid crystal cells 30 as glass substrate, constitute optical laminate 40.
In the example shown in Fig. 1 (B); first diaphragm 3 that will have a surface-treated layer 2 sticks on a face of linear polarization membrane 1 with the face that is in opposition side with described surface-treated layer 2; on the another side of linear polarization membrane 1, paste second diaphragm 4, constitute polarization plates 5.In this embodiment, polarization plates 5 becomes the blooming 10 described in the present invention simultaneously.The adhesive phase that comprises ionic compound 20 that illustrates more than the arranged outside of second diaphragm 4 that constitutes polarization plates 5 constitutes the blooming 25 of being with bonding agent.And, the face that is in opposition side with polarization plates 5 of described adhesive phase 20 is sticked on the liquid crystal cells 30 as glass substrate, constitute optical laminate 40.
In the example shown in Fig. 1 (C), the diaphragm 3 that will have a surface-treated layer 2 sticks on a face of linear polarization membrane 1 with the face that is in opposition side with described surface-treated layer 2, constitutes polarization plates 5.Being on the face of opposition side of linear polarization membrane 1 with diaphragm 3, paste phase retardation film 7 via interlayer adhesive 8, constitute blooming 10.The adhesive phase that comprises ionic compound 20 that illustrates more than the arranged outside of the phase retardation film 7 that constitutes blooming 10 constitutes the blooming 25 of being with bonding agent.And, the face that is in opposition side with blooming 10 of described adhesive phase 20 is sticked on the liquid crystal cells 30 as glass substrate, constitute optical laminate 40.
In addition; in the example shown in Fig. 1 (D); first diaphragm 3 that will have a surface-treated layer 2 sticks on a face of linear polarization membrane 1 with the face that is in opposition side with described surface-treated layer 2, pastes second diaphragm 4 at the another side of linear polarization membrane 1, constitutes polarization plates 5.Phase retardation film 7 is pasted via interlayer adhesive 8 in the outside at second diaphragm 4 that constitutes polarization plates 5, constitutes blooming 10.The adhesive phase that comprises ionic compound 20 that illustrates more than the arranged outside of the phase retardation film 7 that constitutes blooming 10 constitutes the blooming 25 of being with bonding agent.And, the face that is in opposition side with blooming 10 of described adhesive phase 20 is sticked on the liquid crystal cells 30 as glass substrate, constitute optical laminate 40.
In these examples, usually, first diaphragm 3 and second diaphragm 4 are made of three cellulose acetate membrane, in addition, also can be made of above-described various transparent resin films.In addition, the surface-treated layer that is formed at the surface of first diaphragm 3 can be excellent coating, antiglare layer, anti-reflection layer, antistatic layer etc.A plurality of these layers also can be set.
As Fig. 1 (C) and the example (D), on polarization plates 5, during stacked phase retardation film 7,, then, can enumerate 1/4 wavelength plate as the preferred example of this phase retardation film 7 if be middle-size and small-size liquid crystal indicator.Under this situation, usually, be configured with show the mode that 45 degree report to the leadship after accomplishing a task greatly as the slow axis of the phase retardation film 7 of 1/4 wavelength plate with the absorption axes of polarization plates 5, but also can make its angle depart from 45 degree to a certain extent according to the characteristic of liquid crystal cells 30.On the other hand, if be large-scale liquid crystal indicator such as televisor, then phase difference compensation and the viewing angle compensation with liquid crystal cells 30 is purpose, uses the phase retardation film with various phase difference values according to the characteristic of this liquid crystal cells 30.Under this situation, usually, be configured with the absorption axes of polarization plates 5 and the slow axis approximate vertical of phase retardation film 7 or the mode of almost parallel.When constituting phase retardation film 7, preferably use the stretched film of single shaft or twin shaft by 1/4 wavelength plate.In addition, with the phase difference compensation of liquid crystal cells 30 and viewing angle compensation is that purpose is when being provided with phase retardation film 7, except that single shaft or biaxially-stretched film, can also use the film in single shaft or biaxial stretch-formed basic upper edge thickness direction orientation, coating of liquid crystalline equiphase difference is found material and is made the fixing film of its orientation etc. be called as the film of optical compensation films as phase retardation film 7 on support membrane.
Equally, as Fig. 1 (C) and (D) shown in example, when pasting polarization plates 5 and phase retardation film 7 by interlayer adhesive 8, described interlayer adhesive 8 also can use the such antistatic agent of the ionic compound that cooperated above explanation and be endowed the bonding agent of antistatic behaviour, in the common expectation antistatic behaviour within reason of this part, therefore, common use does not comprise the general acrylic adhesive of antistatic agent.In addition, large-scale liquid crystal indicator as previously discussed is such, when being configured in the mode of the slow axis approximate vertical of the absorption axes of polarization plates 5 and phase retardation film 7 or almost parallel, polarization plates 5 and phase retardation film 7 volume to volume ground can be pasted, in the purposes that does not require releasable between the two, also can replace Fig. 1 (C) and (D) shown in interlayer adhesive 8, use in case the bonding agent that will engage securely and can not peel off after bonding.As such bonding agent, for example can enumerate: make the aqueous solvent evaporation present the water system bonding agent of bonding force, be cured the ultraviolet hardening bonding agent that presents bonding force etc. by irradiation ultraviolet radiation by passing through of constituting of aqueous solution or aqueous dispersions.
Need to prove, Fig. 1 (C) and (D) shown in the material itself that on phase retardation film 7, is formed with the adhesive phase 20 that contains ionic compound also can self circulation, and as the blooming of the band bonding agent described in the present invention.The blooming that has formed the band bonding agent of the adhesive phase that contains ionic compound on phase retardation film is made the optical laminate on its adhesive phase can being sticked on the liquid crystal cells as glass substrate, can also paste the blooming that polarization plates is made other band bonding agent in its phase retardation film side.
Among Fig. 1 illustration supposition will be configured in the example of situation of the identification side of liquid crystal cells 30 with the blooming 25 of bonding agent, but the blooming of band bonding agent of the present invention also can be configured in liquid crystal cells rear side, be the backlight side.When the blooming of band bonding agent of the present invention is configured in the rear side of liquid crystal cells, can replace the diaphragm with surface-treated layer 23 shown in Figure 1, adopt the diaphragm that does not have surface-treated layer, all the other and Fig. 1 (A)～(D) similarly constitutes.In addition, under this situation, also can be at known various bloomings that can be configured in the rear side of liquid crystal cells such as the arranged outside brightness improving film of the diaphragm that constitutes polarization plates, condensing film, diffusion barriers.
As described above, optical laminate of the present invention can be preferred for liquid crystal indicator.The PC that the liquid crystal indicator that is formed by optical laminate of the present invention can be used to comprise notebook type for example, desk-top, PDA (Personal Digital Assistance) etc. with LCD, televisor, vehicle with display, e-dictionary, digital camera, digital camera, electronic desktop computer, clock and watch etc.
Embodiment
Below, enumerate embodiment and further specifically describe the present invention, but the present invention is not limited by these examples.In the example, expression use amount or content " part " reaches " % ", unless otherwise specified, is weight basis just.
In following example, nonvolatile component is to use the value of measuring based on the method for JIS K 5407.Particularly, get the binder solution of any weight in glass dish, in explosion-proof baking oven, drying is after 2 hours down in 115 ℃, and residual nonvolatile component weight is the value of nonvolatile component with respect to the ratio of the weight of the solution that records at first.In addition, the mensuration of weight-average molecular weight is following carries out, " the GPC KF-802 " of " the TSK gel XL " of 4 eastern Cao of series connection (Co., Ltd.) system, 1 Shodex (Co., Ltd.) system amounts to 5 as chromatographic column in the GPC device, use tetrahydrofuran as eluent, be under 5mg/ml, sample size 100 μ l, 40 ℃ of temperature, flow velocity 1ml/ minute the condition, to utilize polystyrene standard to convert and carry out at sample solution concentration.
At first, manufacturing is shown as the acryl resin of the major component of adhesive composition and satisfy the resin of regulation of the present invention and the example of the resin of the regulation of discontented unabridged version invention.
[polymerization example 1]
Possess cooling tube, nitrogen ingress pipe, temperature take into account add 81.8 parts of ethyl acetates in the reaction vessel of stirring machine, as 88.6 parts of the butyl acrylates of A-1, as 10 parts of the acrylic acid 2-methoxyl ethyl esters of A-2, as the mixed solution of 0.4 part in 1.0 parts of the acrylic acid 2-hydroxy methacrylates of A-3 and acrylic acid, make its oxygen-free gas with the air in the nitrogen replaceable equipment, simultaneously, with interior temperature rise to 55 ℃.Add azobis isobutyronitrile (polymerization initiator) 0.14 part be dissolved in ethyl acetate 10 part and the complete soln that obtain thereafter.Add initiating agent after 1 hour, be 35% mode, be that 17.3 parts/hr is added on ethyl acetate in the reaction vessel continuously with the concentration of the acryl resin that do not comprise monomer with interpolation speed, simultaneously, be incubated 12 hours down for 54～56 ℃ in interior temperature, add ethyl acetate at last, regulating the concentration that makes acryl resin is 20%.Resulting acryl resin utilizes that the weight-average molecular weight Mw of the polystyrene conversion that GPC measures is 1,750,000, Mw/Mn is 4.9.With it as acryl resin A.The structural unit that derives from as the acrylic acid 2-hydroxy methacrylate of hydroxyl monomer among the acryl resin A is 1%, in addition, and from being 0.4% as the acrylic acid structural unit that contains carboxylic monomer.
[polymerization example 2]
More 78.6 parts of the quantitative changes of butyl acrylate in monomer is formed, the quantitative change of acrylic acid 2-methoxyl ethyl ester more 20 parts, is operated equally with polymerization example 1, obtained the ethyl acetate solution of acryl resin.The weight-average molecular weight Mw that utilizes the polystyrene conversion that GPC measures of resulting acryl resin is 1,660,000, Mw/Mn is 4.4.With it as acryl resin B.The structural unit from as the acrylic acid 2-hydroxy methacrylate of hydroxyl monomer among the acryl resin B is 1%, in addition, and from being 0.4% as the acrylic acid structural unit that contains carboxylic monomer.
[polymerization example 3]
More 58.6 parts of the quantitative changes of butyl acrylate in monomer is formed, the quantitative change of acrylic acid 2-methoxyl ethyl ester more 40 parts, is operated equally with polymerization example 1, obtained the ethyl acetate solution of acryl resin.The weight-average molecular weight Mw that utilizes the polystyrene conversion that GPC measures of resulting acryl resin is 1,580,000, Mw/Mn is 4.8.With it as acryl resin C.The structural unit from as the acrylic acid 2-hydroxy methacrylate of hydroxyl monomer among the acryl resin C is 1%, in addition, and from being 0.4% as the acrylic acid structural unit that contains carboxylic monomer.
[polymerization example 4]
More 93.6 parts of the quantitative changes of butyl acrylate in monomer is formed, with the quantitative change of acrylic acid 2-methoxyl ethyl ester more 5 parts and temperature retention time was made as 18 hours, operate equally with polymerization example 1, obtain the ethyl acetate solution of acryl resin.The weight-average molecular weight Mw that utilizes the polystyrene conversion that GPC measures of resulting acryl resin is 1,680,000, Mw/Mn is 5.4.With it as acryl resin D.The structural unit from as the acrylic acid 2-hydroxy methacrylate of hydroxyl monomer among the acryl resin D is 1%, in addition, and from being 0.4% as the acrylic acid structural unit that contains carboxylic monomer.
[polymerization example 5]
The amount of butyl acrylate is made as 98.6 parts and do not use the acrylic acid 2-methoxyl ethyl ester in monomer is formed, and operates equally with polymerization example 1, obtains the ethyl acetate solution of acryl resin.The weight-average molecular weight Mw that utilizes the polystyrene conversion that GPC measures of resulting acryl resin is 1,470,000, Mw/Mn is 4.4.With it as Eudragit E.The structural unit from as the acrylic acid 2-hydroxy methacrylate of hydroxyl monomer in the Eudragit E is 1%, in addition, and from being 0.4% as the acrylic acid structural unit that contains carboxylic monomer.
The guide look of the monomer composition of polymerization example 1～5, weight-average molecular weight, Mw/Mn is shown in table 1.In the table, BA is meant butyl acrylate, and MEA is meant acrylic acid 2-methoxyl ethyl ester, and HEA is meant acrylic acid 2-hydroxy methacrylate, and AA is meant acrylic acid.
[table 1]
Figure BPA00001309963200241
Then, embodiment and the comparative example that uses the above acryl resin of making to prepare adhesive composition and be applied to blooming is shown.In the following example,, use following ionic compound 1～3 as ionic compound.Following ionic compound 1 and 2 is solid under 25 ℃ room temperature, and ionic compound 3 is liquid under 25 ℃ room temperature.
Ionic compound 1 (solid): N-octyl group-4-picoline hexafluorophosphate structure, the fusing point of following formula (have 44 ℃)
Ionic compound 2 (solid): two (trifluoromethane sulfonyl group) acid imides of tributyl-methyl phosphonium ammonium structure, the fusing point of following formula (have 28 ℃)
Figure BPA00001309963200243
Ionic compound 3 (liquid): N-hexyl-4-picoline hexafluorophosphate structure, the fusing point of following formula (have 18 ℃)
In addition, as crosslinking chemical and silane based compound, use following material (being trade name) respectively.
(crosslinking chemical)
CORONATE L: the ethyl acetate solution of the trimethylolpropane adduct of toluene diisocyanate (solid component concentration 75%), obtain from Japanese polyurethane Co., Ltd..
(silane based compound)
KBM-403: glycidoxypropyltrime,hoxysilane (liquid), obtain from Shin-Etsu Chemial Co., Ltd.
[embodiment 1～4 and comparative example 1～2]
(a) manufacturing of adhesive composition
With respect to each 100 parts of the solid constituents of the acryl resin A～E that obtains in the polymerization example 1～5, respectively each 3 parts of the ionic compounds shown in the mixture table 2, count 0.5 part crosslinking chemical " CORONATE L ", and 0.5 part silane based compound " KBM-403 " with solid constituent, and then be that 13% mode is added ethyl acetate with solid component concentration, make adhesive composition.In ionic compound one hurdle of table 2, show the sequence number of above-mentioned ionic compound 1～3 and at room temperature be the solid or the situation of liquid.
(b) making of the blooming of band bonding agent
The polyethylene terephthalate film that above-mentioned each adhesive composition is used coater to be coated on the demoulding to handle (trade name " PET 3811 ", obtains from lintec (Co., Ltd.), be called separation layer (separator)) demoulding treated side on, making dried thickness is 20 μ m, and, obtain the bonding agent of sheet at 90 ℃ times dry 1 minute.Then; using the diaphragm clamping absorption orientation that constitutes by Triafol T to have on the face of polarization plates of the 3-tier architecture that the two sides of the polyvinyl alcohol (PVA) polaroid of iodine forms; behind lamination and the fit above-mentioned sheet bonding agent that obtains and the face separation layer opposition side (bonding agent face); slaking is 7 days under the condition of 23 ℃ of temperature, relative humidity 65%, obtains the polarization plates with bonding agent.
(c) the antistatic behaviour evaluation of the blooming of band bonding agent
When the separation layer of resulting band bonding agent polarization plates is peeled off,, estimate antistatic behaviour with the sheet resistance value of surperficial intrinsic resistance determinator [the Hirest-up MCP-HT450 (trade name) of Mitsubishi chemical Co., Ltd's system] mensuration bonding agent.In the IPS pattern, need make sheet resistance value is 10 10Ω/ rank or its following rank also require long-term this antistatic property that keeps.The evaluation of antistatic behaviour is directly carried out after the slaking of band bonding agent polarization plates finishes.In addition, when observing long preservation through the time change, the keeping in the baking oven of 60 ℃ of temperature, relative humidity 70% of the band bonding agent polarization plates after slaking is finished with the above-mentioned separation layer of similarly peeling off, was measured the sheet resistance value of bonding agent after 6 days.At this, can obtain and at room temperature take care of 6 months roughly the same effects in 6 days in 60 ℃ of temperature, 70% time keeping of relative humidity.Show the result in table 2.
(d) making of optical laminate and evaluation
After peeling separation layer from the polarization plates of the band bonding agent made by above-mentioned (b), its bonding agent face is pasted on the one side of liquid crystal cells with glass substrate [" 1737 " (trade name) of Corning corporate system], makes optical laminate.For each optical laminate, carry out 300 hours heat resistant test (in table 2, being designated as " heat-resisting ") of keeping under the drying condition of 80 ℃ of temperature respectively; Carry out in 60 ℃ of temperature, 300 hours hot resistance test of 90% time keeping of relative humidity (in table 2, being designated as " moisture-proof heat "); And be cooled to-30 ℃ from the state that is heated to 70 ℃, when then being warming up to 70 ℃ process as 1 circulation (1 hour), repeat 100 these round-robin heatproof impact tests (in table 2, being designated as " anti-HS "), the situation of the optical laminate after the visualization test.The result with following benchmark classification, is summarized in table 2.
(with respect to the metewand of the permanance (in table 2, being designated as " heat-resisting ", " moisture-proof heat ", " anti-HS " respectively) of hot, damp and hot and thermal shock)
1: do not observe fully heave, peel off, appearance change such as foaming.
2: almost do not observe heave, peel off, appearance change such as foaming.
3: heave, peel off, appearance change such as foaming is remarkable a little.
4: see significantly heave, peel off, appearance change such as foaming.
(e) the re-workability evaluation of the blooming of band bonding agent
The evaluation of re-workability is following to be carried out.At first, the polarization plates of the band bonding agent that obtains in above-mentioned (b) is cut out the test film that is slit into 25mm * 150mm size.Then, use sticker (" Lamipacker " (trade name) of Fujipla (Co., Ltd.) system) that this test film is sticked on liquid crystal cells with on the glass substrate with its binder side, and at 50 ℃, 5kg/cm 2Carrying out 20 minutes autoclaves (490.3kPa) handles.Then, under 70 ℃, carry out 2 hours heat treated, then in 50 ℃ baking oven, preserve after 48 hours, in the atmosphere of 23 ℃ of temperature, relative humidity 50%, from this stickup test film polarization plates is peeled off along 180 ° of directions with the speed that 300mm/ divides, the state on sight glass plate surface is classified according to following benchmark.The result is shown in table 2 in the lump.
The metewand of＜re-workability 〉
1: glass pane surface does not produce stain etc. fully.
2: glass pane surface does not almost produce stain etc.
3: glass pane surface produces stain etc.
4: glass pane surface produces the residual of bonding agent.
[table 2]
Figure BPA00001309963200271
By table 1 and table 2 as can be known, in the acryl resin of the present invention regulation, cooperate the ionic solid of ormal weight and constitute the embodiment 1～4 of adhesive composition, compare with the comparative example 2 that cooperates ionic liquid, show much at one antistatic behaviour at the making initial stage, simultaneously, even it is also almost constant to place antistatic behaviour for a long time, in addition, thermotolerance, humidity resistance and resistance to sudden heating also obtain roughly gratifying result.
With respect to this, in acryl resin, do not contain comparative example 1 from the structural unit of ether type (methyl) acrylate of formula (II), though obtaining good result aspect thermotolerance, humidity resistance and the resistance to sudden heating, showing the result of initial stage antistatic property difference.N-hexyl-4-picoline hexafluorophosphate (ionic compound 3) for liquid under having cooperated 25 ℃ constitutes the comparative example 2 of adhesive composition, though show good antistatic behaviour at the making initial stage, but in the promotion test of heating is that 60 ℃ of temperature, 70% time preservation of relative humidity are in the time of 6 days, the sheet resistance value after separation layer is peeled off and the value at initial stage are in a ratio of more than 10 times, have the tendency because of long-term keeping antistatic behaviour variation.
This disclosed embodiment and embodiment are not to limit for illustration in all respects.Scope of the present invention is not limited to above-mentioned explanation and by shown in the scope of claim, has the meaning that is equal to the scope of claim and all changes of scope include within the scope of the invention.
Utilizability on the industry
Blooming with adhesive of the present invention is endowed high antistatic behaviour, and keeps for a long time this antistatic behaviour, and in addition, durability is also excellent. This blooming with adhesive is preferred for liquid crystal indicator.
Symbol description
1 linear polarization membrane, 2 surface-treated layers, 3 first diaphragms, 4 second diaphragms, 5 polarization plates, 7 phase retardation films, 8 interlayer adhesives, 10 bloomings, 20 comprise adhesive phase, 25 bloomings with adhesive, 30 liquid crystal cells (glass substrate), 40 optical laminates of ionic compound.

Claims (8)

1. the blooming with bonding agent is characterized in that, is that at least one face at blooming forms adhesive phase and forms, wherein,
Described adhesive phase is formed by the adhesive composition of the C of the B of A that contains 100 weight portions and 0.3～12 weight portion and 0.1～5 weight portion,
The serve as reasons acryl resin of the multipolymer that the monomer mixture of A-3 of the A-2 of the A-1, the 5-40 weight % that contain 55～94 weight % and 0.1～5 weight % obtains of described A,
Described B has organic cation and at room temperature is the ionic compound of solid,
Described C is a crosslinking chemical,
Described A-1 is (methyl) acrylate of following formula (I) expression,
Figure FPA00001309963100011
In the formula, R 1Expression hydrogen atom or methyl, R 2The expression carbon number is 1～14 alkyl or aralkyl,
Described A-2 is (methyl) acrylate of following formula (II) expression,
Figure FPA00001309963100012
In the formula, R 3Expression hydrogen atom or methyl, R 4The expression carbon number is 1～8 alkyl, and n is 1～10 integer,
Described A-3 is the unsaturated monomer with polar functional group.
2. the blooming of band bonding agent as claimed in claim 1, wherein,
(methyl) acrylate of described formula (II) expression is an acrylic acid 2-methoxyl ethyl ester.
3. the blooming of band bonding agent as claimed in claim 1, wherein,
Described polar functional group with unsaturated monomer A-3 of polar functional group is selected from free carboxy, hydroxyl, amino and epoxide ring.
4. the blooming of band bonding agent as claimed in claim 3, wherein,
Described crosslinking chemical C contains the isocyanates based compound.
5. the blooming of band bonding agent as claimed in claim 1, wherein,
Described adhesive composition also comprises the D silane based compound of 0.03～1 weight portion.
6. the blooming of band bonding agent as claimed in claim 1, wherein,
Described blooming is selected from polarization plates and phase retardation film.
7. the blooming of band bonding agent as claimed in claim 1, wherein,
Surface at adhesive phase is pasted with stripping film.
8. an optical laminate is characterized in that, is that blooming by the described band bonding agent of claim 1 is laminated in glass substrate with its adhesive phase side and forms.
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