CN1570007A - Adhesive and optical parts using the same - Google Patents

Adhesive and optical parts using the same Download PDF

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Publication number
CN1570007A
CN1570007A CNA2004100385528A CN200410038552A CN1570007A CN 1570007 A CN1570007 A CN 1570007A CN A2004100385528 A CNA2004100385528 A CN A2004100385528A CN 200410038552 A CN200410038552 A CN 200410038552A CN 1570007 A CN1570007 A CN 1570007A
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China
Prior art keywords
multipolymer
monomer
weight
aforementioned
tackiness agent
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Granted
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CNA2004100385528A
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CN100523109C (en
Inventor
中村稔
桑原泰人
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Artience Co Ltd
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Toyo Ink Mfg Co Ltd
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Publication of CN1570007A publication Critical patent/CN1570007A/en
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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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • 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
    • C09J133/062—Copolymers with monomers not covered by C09J133/06
    • 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
    • C09J133/062—Copolymers with monomers not covered by C09J133/06
    • C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
    • 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
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Polymerisation Methods In General (AREA)
  • Polarising Elements (AREA)

Abstract

Provided is a pressure-sensitive adhesive which does not cause foaming, peeling and the like under heat or wet heat conditions, and relaxes the stress concentration caused by the stretching or contraction of a polarizing plate or the like not to cause color shading and a void in a liquid crystal device. This pressure-sensitive adhesive comprises a copolymer (A) having a weight average molecular weight of 1,000,000 to 2,000,000 obtained by radical copolymerization of a monomer (a) having a reactive functional group and another monomer (b), 20-100 pts.wt., based on 100 pts.wt. copolymer (A), copolymer (B) having a weight average molecular weight of 10,000 to 100,000, and 0.003-3 pts.wt. polyfunctional compound (C) having at least two reactive functional groups capable of reacting with the above copolymer (A) and/or the above copolymer (B). The optical member has a pressure-sensitive adhesive layer composed of the pressure-sensitive adhesive formed on at least one surface thereof.

Description

The optics of tackiness agent and this tackiness agent of employing
Technical field
The present invention relates on the opticses such as (liquid crystal セ Le) of liquid crystal indicator liquid crystal pond, paste the used tackiness agents of optics such as polaroid and phase difference film, and the optics that has adopted this tackiness agent.
Background technology
Pasting the laminate of polaroid and polaroid and phase difference film on the opticses such as the liquid crystal pond of liquid crystal indicator.This polaroid, generally be with tri acetyl cellulose be screening glass from the two sides with polyethenol series polarizer centre at the intermediary multilayered structure, and be to form binder layer on the screening glass at the tri acetyl cellulose of these polaroid one or both sides.Polaroid sticks on by this binder layer on the opticses such as liquid crystal pond, is used for liquid crystal indicator thus.In recent years, liquid crystal indicator is from beginning to expand to gradually auto navigation with vehicle-mounted purposes such as indicating meters with the domestic applications headed by personal computer displays, the LCD TV, and it is more and more harsher that its environment for use becomes.
The polaroid that liquid crystal indicator is used, due to its material behavior, its dimensional stability is very poor, under heat or wet heat condition, take place flexible, so therefore altering a great deal of size be easy to generate binder layer foaming and polaroid under these conditions and float off problems such as (floating I Ha ガ レ) from the liquid crystal pond.
In order to address these problems, as tackiness agent, the pressure sensitive adhesive that formed by acrylic acid polymer has been proposed, it is by being that 1-12 (methyl) alkyl acrylate is the pressure sensitive adhesive that is formed by acrylic acid polymer of main component with the alkyl carbon atoms number, the weight-average molecular weight that this pressure sensitive adhesive contains 15 weight % at the most is 100,000 component of polymer at the most, and contains the component of polymer (referring to open flat 1-66283 communique such as the spy) of the weight-average molecular weight at least 100 ten thousand of at least 10 weight %.
By adopting aforementioned pressure sensitive adhesive, can suppress the phenomenon that binder layer foaming and polaroid float off from the liquid crystal pond, but the stress that can't absorb and relax and produce because of the polaroid dimensional change, stress concentration is on the edge of polaroid, therefore so the edge of liquid crystal indicator is different with the bright degree of central part, exist the problem that on the liquid crystal indicator surface, produces the inhomogeneous and hickie of color.
In order to eliminate the inhomogeneous and hickie phenomenon of the lip-deep color of liquid crystal indicator, as tackiness agent, by high molecular (methyl) acrylic copolymer 100 weight parts of weight-average molecular weight at least 100 ten thousand, weight-average molecular weight at the most the polaroid tackiness agent that forms of 30,000 lower molecular weight (methyl) acrylic copolymer 20-200 weight part and multi-functional compounds 0.005-5 weight part be known (referring to open flat 10-279907 communique such as the spy).
Also have, by can being that the weight-average molecular weight that 1,000,000-2,500,000 high-molecular-weight propylene acid based polymer and second-order transition temperature are 0 ℃～-80 ℃ is that the polaroid binder composition that 30,000-100,000 low molecular weight acrylic acid series polymeric compounds and the multi-functional compounds with the functional group that can form crosslinking structure form is known (referring to open the 2002-121521 communique such as the spy) with the weight-average molecular weight that contains reactive functional groups.
Open in the flat 10-279907 communique the spy, the disclosed polaroid-bindnig agent of the document can be followed the dimensional change of polaroid, therefore according to described, is not easy to produce the inhomogeneous and hickie phenomenon of color on liquid crystal cell.But, the disclosed polaroid-bindnig agent of Te Kaiping 10-279907 communique, in the high molecular three-dimensional cross-linked (methyl) acrylic copolymer, exist and be difficult to take place crosslinked or can't carry out crosslinked lower molecular weight (methyl) acrylic acid series (being total to) polymkeric substance with the multi-functional compounds, so can demonstrate stress relaxation ability, can improve the inhomogeneous and hickie phenomenon of color, but lower molecular weight (methyl) acrylic acid polymer is easy to seepage, makes adherend be subjected to pollution problems and waits to solve.
Also have, the spy opens and discloses the polaroid binder composition in the 2002-121521 communique, according to described, possessed simultaneously and be not easy to produce color inhomogeneous and the performance of hickie phenomenon and the performance that low molecular weight acrylic acid series polymeric compounds is difficult for taking place seepage, but in the application of the liquid crystal indicator under rigorous environment more, be difficult to performance performance balance effect.
Summary of the invention
Therefore, the purpose of this invention is to provide tackiness agent, when adopting it, even under heat or wet heat condition, also do not produce phenomenons such as binder layer foaming and polaroid float off, make the stress concentration phenomenon that produces because of polaroid is flexible etc. obtain relaxing thereby make phenomenons such as not producing the inhomogeneous and hickie of color on the liquid crystal indicator, and can reduce problems such as the adherend pollution that produces when pasting polaroid again and preformed casse.
Tackiness agent of the present invention is because contain low-molecular weight copolymer (B) and the multi-functional compounds (C) that the high molecular weight copolymer (A) of specified proportion, the monomer that has carboxyl and other monomer obtain by free radicals copolymerization reaction in the presence of this multipolymer (A), so had phenomenon demulcent performances such as making the inhomogeneous and hickie of the color that produces because of the polaroid dimensional change simultaneously, and performance with phenomenons such as separating of under heat or wet heat condition, can suppressing to foam.
Promptly, tackiness agent of the present invention is the tackiness agent that comprises following component: multipolymer (A), it forms by free radicals copolymerization reaction by following monomer (a) with (b), its weight-average molecular weight is at least 100 ten thousand at the most 2,000,000, with respect to this multipolymer (A) 100 weight parts, by following monomer (c) and the weight-average molecular weight at least 1 ten thousand that (d) in the presence of aforementioned multipolymer (A), forms 100,000 multipolymer (B) 20-100 weight part at the most by free radicals copolymerization reaction, and multi-functional compounds (C) the 0.003-3 weight part that has at least two reactive functional groups that can react with aforementioned multipolymer (A) and/or aforementioned multipolymer (B)
(a) have the monomer of reactive functional groups and ethylenical unsaturated double bonds,
(b) can copolyreaction take place with aforementioned multipolymer (a) and have the monomer of the ethylenical unsaturated double bonds different with aforementioned multipolymer (a),
(c) have the monomer of carboxyl and ethylenical unsaturated double bonds,
(d) can copolyreaction take place with aforementioned multipolymer (c) and have the monomer of the ethylenical unsaturated double bonds different with aforementioned multipolymer (c).
In above-mentioned tackiness agent, the copolymerization ratio that constitutes the monomer (a) of multipolymer (A) is that 0.1-15 weight % is preferred, and the copolymerization ratio of monomer (b) is that 85-99.9 weight % is preferred.
Also have, the manufacture method of tackiness agent is the tackiness agent manufacture method that comprises following operation (1)-(3) among the present invention:
(1) make the monomer (a) that has reactive functional groups and ethylenical unsaturated double bonds press transformation efficiency 50-90% generation free radicals copolymerization reaction and the operation of polymerization multipolymer (A) with the monomer (b) that can copolyreaction take place with aforementioned multipolymer (a) and have an ethylenical unsaturated double bonds different with aforementioned multipolymer (a);
Monomer residual when (2) making multipolymer (A) polymerization issues living free radicals copolymerization reaction and the operation of polymerization multipolymer (B) with the monomer (c) that has carboxyl and ethylenical unsaturated double bonds in multipolymer (A) existence;
(3) add the operation of the multi-functional compounds (C) with at least two reactive functional groups that can react with multipolymer (A) and/or multipolymer (B).
In operation (2), polymerization multipolymer (B) is preferred to monomer residual when making multipolymer (A) polymerization by transformation efficiency 70-100% generation free radicals copolymerization reaction with the monomer (c) that has carboxyl and ethylenical unsaturated double bonds.
Also have, tackiness agent of the present invention is the tackiness agent of making according to preceding method.
Also have, optics of the present invention is the optics as feature, has promptly formed the binder layer with aforementioned any one tackiness agent at least one face of this optics.
Embodiment
At first, describe at tackiness agent of the present invention.
Contained multipolymer (A) is the monomer (a) that has reactive functional groups and an ethylenical unsaturated double bonds and can copolyreaction take place with aforementioned multipolymer (a) and have the multipolymer that the monomer (b) [that is, having the monomer (b) that other ethylenical unsaturated double bonds of copolyreaction can take place with (a)] of the ethylenical unsaturated double bonds different with aforementioned multipolymer (a) obtains by free radicals copolymerization reaction in the tackiness agent.With regard to reactive functional groups, can mention carboxyl, hydroxyl, amino, amide group, dimaleoyl imino, clothing health imide, succinimido, epoxy group(ing) etc.Also have, with regard to monomer (a) and monomer (b), can adopt (methyl) acrylic monomer, ethene base system monomer aptly.
The specific examples that has the monomer (a) of carboxyl can be mentioned (methyl) vinylformic acid, propenoic acid beta-carboxy ethyl ester, methylene-succinic acid, Ba Dousuan, fumaric acid, fumaric acid anhydride, toxilic acid, maleic anhydride, toxilic acid butyl ester etc.
The specific examples that has the monomer (a) of hydroxyl can be mentioned (methyl) vinylformic acid 2-hydroxyethyl ester, (methyl) vinylformic acid 2-hydroxy-propyl ester, (methyl) vinylformic acid 4-hydroxybutyl ester, (methyl) vinylformic acid 6-hydroxyl polyhexamethylene, (methyl) vinylformic acid 8-hydroxyl octyl group ester, (methyl) vinylformic acid 10-hydroxyl decyl ester, (methyl) vinylformic acid 12-hydroxyl Lauryl Ester, methacrylic acid (4-hydroxymethyl hexyl) ester, (methyl) vinylformic acid chloro-2-hydroxy-propyl ester, Diethylene Glycol list (methyl) acrylate, (methyl) esters of acrylic acid of caprolactone modification, polyoxyethylene glycol (methyl) esters of acrylic acid, polypropylene glycol (methyl) esters of acrylic acid etc.
Have the specific examples of amino monomer (a), can mention (methyl) acrylic-amino methyl ester, (methyl) vinylformic acid dimethylaminomethyl ester, (methyl) vinylformic acid dimethyl aminoethyl ester, (methyl) vinylformic acid dimethylaminopropyl ester etc.
The specific examples that has the monomer (a) of amide group can mention that (methyl) acrylamide, N-acryloyl morpholine, N-replace (methyl) acrylamide, N-vinyl pyrrolidone etc.
The specific examples that has the monomer (a) of dimaleoyl imino can be mentioned N-cyclohexyl maleimide, N-sec.-propyl maleimide, N-lauryl maleimide, N-phenylmaleimide etc.
The specific examples that has the monomer (a) of clothing health imide can be mentioned N-methyl clothing health imide, N-ethyl clothing health imide, N-butyl clothing health imide, N-octyl group clothing health imide, N-2-ethylhexyl clothing health imide, N-cyclohexyl clothing health imide, N-lauryl clothing health imide etc.
The specific examples that has the monomer (a) of succinimido can be mentioned N-(methyl) acryloyl-oxy methylene radical succinimide, N-(methyl) acryloyl-6-oxygen hexa-methylene succinimide, N-(methyl) acryloyl-8-oxygen eight methylene radical succinimides etc.
Have the specific examples of the monomer (a) of epoxy group(ing), can mention (methyl) glycidyl acrylate etc.
These monomers can independent or a plurality of being used in combination.
The copolymerization ratio that constitutes the monomer (a) of multipolymer (A) is that 0.1-15 weight % is preferred based on monomeric total amount.When the copolymerization ratio was lower than 0.1 weight %, the aggregation force of tackiness agent reduced, phenomenon such as might produce the tackiness agent foaming and float off under heating environment.Also have, when surpassing 15 weight %, the bonding force of tackiness agent reduces, and is difficult to obtain fully absorb and lax performance because of the flexible stress concentration phenomenon that causes of polaroid.
Also have, the specific examples of monomer (b), can mention (methyl) acrylate, such as (methyl) methyl acrylate, (methyl) vinylformic acid ethyl ester, (methyl) vinylformic acid propyl diester, (methyl) n-butylacrylate, (methyl) vinylformic acid isobutyl, (methyl) 2-ethylhexyl acrylate, (methyl) vinylformic acid n-octyl ester, (methyl) isooctyl acrylate ester, (methyl) vinylformic acid Lauryl Ester, (methyl) vinylformic acid stearyl, the different nonyl ester of (methyl) vinylformic acid, (methyl) vinylformic acid cyclohexyl ester, (methyl) vinylformic acid benzyl ester, (methyl) vinylformic acid methoxy ethyl ester, (methyl) vinylformic acid ethoxyethyl group ester, (methyl) vinylformic acid phenoxy group ethyl ester etc.Also have, can mention aromatic vinyl monomers such as vinylbenzene, vinyl toluene, Vinyl toluene, vinyl-acetic ester, (methyl) vinyl cyanide etc.
Monomer (b) the copolymerization ratio that constitutes multipolymer (A) is that 85-99.9 weight % is preferred based on monomeric total amount.When the copolymerization ratio was lower than 85 weight %, the adherence of polaroid and optics descended.Also have, when surpassing 99.9 weight %, the content that has the monomer (a) of reactive functional groups tails off, and the aggregation force of tackiness agent reduces, phenomenon such as can produce the tackiness agent foaming and float off under heating environment.
Multipolymer (A) can be by known any method manufacturing.
Such as, during synthetic copolymer (A),, can adopt the polymerization starter of 0.001-1 weight part with respect to monomer total amount 100 weight parts, can carry out the preferred solution polymerization process by methods such as mass polymerization, solution polymerizations.With regard to polymerization starter, can adopt azo based compound, organo-peroxide, two kinds or above polymerization starter is shared also is fine.Also have, during solution polymerization, with regard to polymer solvent, can adopt ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone etc.Two kinds or above polymer solvent mix to use and also are fine.
With regard to the azo based compound in the polymerization starter, can mention such as 2,2 '-Diisopropyl azodicarboxylate, 2,2 '-azo two (2-methylbutyronitrile), 1,1 '-azo two (hexanaphthene-1-nitrile), 2,2 '-azo two (2, the 4-methyl pentane nitrile), 2,2 '-azo two (2,4-dimethyl-4-methoxyl group valeronitrile), dimethyl 2,2 '-azo two (2 Methylpropionic acid ester), 4,4 '-azo two (4-cyanopentanoic acid), 2,2 '-azo two (2-hydroxymethyl propionitrile), 2,2 '-azo two [2-(2-tetrahydroglyoxaline-2-yl) propane] etc.
Also have; with regard to organo-peroxide; such as mentioning benzoyl peroxide, TBPB tertiary butyl perbenzoate, cumene hydroperoxide, diisopropyl peroxydicarbonate, di peroxy dicarbonate, two (2-ethoxyethyl group) peroxy dicarbonate, tert-butyl hydroperoxide neodecanoic acid ester, t-butylperoxy pivarate (t-Block チ Le パ-オ キ シ PVC バ レ-ト), (3; 5,5-trimethyl acetyl base) superoxide, dipropyl acyl peroxide, diacetyl peroxide etc.
The weight-average molecular weight of multipolymer (A) is necessary at least 100 ten thousand at the most 2,000,000, and at least 120 ten thousand 1,800,000 is preferred at the most.The weight-average molecular weight of multipolymer (A) is than 1,000,000 hours, even re-use after crosslinked, the aggregation force of tackiness agent is also not enough, phenomenon such as can produce foaming and float off.Also have, weight-average molecular weight surpasses at 2,000,000 o'clock, and it is big that the viscosity of tackiness agent becomes, and makes processing property variation such as coating.And the weight-average molecular weight of multipolymer (A) is to begin polymerization before by taking a sample at multipolymer (B) from reaction soln, utilizes gel permeation chromatography (GPC) to measure and calculates.
Contained multipolymer (B) is the monomer (c) that has carboxyl and ethylenical unsaturated double bonds and the having weight-average molecular weight at least 1 ten thousand that can form by free radicals copolymerization reaction in the presence of aforementioned multipolymer (A) with the monomer (d) of other ethylenical unsaturated double bonds of (c) copolymerization 100,000 a multipolymer at the most in the tackiness agent.By monomer (c) and monomer (d) multipolymer (B) that obtain by free radicals copolymerization reaction, that molecular weight ratio multipolymer (A) is lower will be included in the tackiness agent, even under heat or wet heat condition, also can not produce the tackiness agent foaming and phenomenon such as float off, make because of the flexible stress concentration that produces of polaroid and obtain relaxing thereby making not producing the inhomogeneous and hickie phenomenon of color on the liquid crystal cell.
With regard to monomer (c) and monomer (d), can adopt (methyl) acrylic monomer, ethene base system monomer aptly.The specific examples of monomer (c) can be mentioned (methyl) vinylformic acid, β-carboxy ethyl acrylate, methylene-succinic acid, Ba Dousuan, fumaric acid, fumaric acid anhydride, toxilic acid, maleic anhydride, toxilic acid butyl ester etc.These monomers can be independent or be a plurality ofly combined employing.
It is preferred that the copolymerization ratio of the monomer (c) of formation multipolymer (B) is counted 0.1-50 weight % with the total amount of monomer (c) and monomer (d), and 0.5-30 weight % is more preferred.
As monomer (d), can adopt and in the monomer (a) that constitutes multipolymer (A), have the identical monomer of monomer (a) of the reactive functional groups except that carboxyl, and with the identical monomer of monomer (b).
Multipolymer (B) can be the monomer (c) that has carboxyl and an ethylenical unsaturated double bonds with can with (c) copolymerization of aforementioned multipolymer and the monomer (d) [that is, having the monomer (d) that other ethylenical unsaturated double bonds of copolyreaction can take place with (c)] that has an ethylenical unsaturated double bonds different with aforementioned multipolymer (c) in the presence of multipolymer (A) according to the method identical with multipolymer (A) by the free radicals copolymerization reaction manufacturing.Multipolymer (B) preferably make monomer (a) and monomer (b) according to transformation efficiency 50-90% (preferred 70-80%) by free radicals copolymerization reaction and polymerization multipolymer (A) afterwards, make residual monomer and monomer (c) in the presence of multipolymer (A), carry out free radicals copolymerization reaction and make.
Also have, to carry out free radicals copolymerization reaction by transformation efficiency 70-100% be preferred for residual monomer and monomer (c) during multipolymer (A) polymerization.Wherein, transformation efficiency is that the weight of monomer polymerization and the multipolymer that obtains is divided by as the resulting value of raw-material monomeric gross weight.
By under aforementioned transformation efficiency, making multipolymer (A) and multipolymer (B) polymerization,, be easy to make multipolymer (B) to be in the scope of 20-100 weight part with respect to multipolymer (A) 100 weight parts.
Multipolymer (B) preferably passes through the solution polymerization process synthetic, the polymerization starter when using synthetic copolymer (A) about the 5-50 times of weight, and it is preferred promptly adopting the polymerization starter of 0.005-50 weight part with respect to monomer total amount 100 weight parts.Also have, during synthetic copolymer (B), use chain-transfer agents such as thio-alcohol, alpha-methyl styrene dimer, terpadiene such as lauryl mercaptan, n-dodecyl mercaptan also to be fine.
The weight-average molecular weight of multipolymer (B) must at least 1 ten thousand at the most 100,000, and more preferably at least 2 ten thousand at the most 50,000.When using weight-average molecular weight, because the aggregation force deficiency is easy to generate and foams and phenomenon such as float off than 10,000 little multipolymers (B).Also have, when using weight-average molecular weight to surpass 100,000 multipolymer (B), fully absorb and the character that relax because of the flexible stress concentration phenomenon that causes of polaroid is to be difficult to acquisition.Wherein, the weight-average molecular weight of multipolymer (B) is to measure the differential spectra that the GPC of the multipolymer (A) that GPC spectrum that multipolymer (A) and multipolymer (B) mixture obtain and preceding method measure composes through the GPC method and obtain by calculating.
With respect to multipolymer (A) 100 weight parts, the content of contained multipolymer (B) is the 20-100 weight part in the tackiness agent, preferred 20-50 weight part.When the content of multipolymer (B) is lower than 20 weight parts, fully absorb and the character of the stress concentration phenomenon that causes because of polaroid is flexible of relaxing is to be difficult to obtain.Also have, when multipolymer (B) content surpasses 100 weight parts, because the aggregation force deficiency of tackiness agent is easy to generate foaming and phenomenon such as floats off.
The weight ratio of multipolymer (A) and multipolymer (B) obtains by the following method.Promptly, at first a certain amount of solution that will take a sample before multipolymer (B) polymerization begins adds accurately weighing then in the known container of weight to, solution heat drying with this accurate weighing, multipolymer composition is in addition vapored away, with the only residual accurate weighing of container that multipolymer (A) is arranged, calculate the weight of multipolymer (A) contained in this a certain amount of solution.After multipolymer (B) polymerization finished, sampling contained the solution of multipolymer (A) and multipolymer (B) then, and identical method when adopting with calculating multipolymer (A) weight calculates the weight of multipolymer contained in a certain amount of solution (A) and multipolymer (B).Weight with multipolymer contained in a certain amount of solution (A) and multipolymer (A) and multipolymer (B) mixture is converted into the multipolymer (A) contained in the amount solution and the weight of multipolymer (A) and multipolymer (B) mixture then, deduction falls multipolymer (A) from the weight of multipolymer (A) and multipolymer (B) mixture, calculates the weight of multipolymer (B) thus.
The multi-functional compounds (C) of containing at least two reactive functional groups that can react with contained multipolymer (A) in the tackiness agent and/or multipolymer (B) is the compound with reactive functional groups that carboxyl that at least two, preferred 2-4 the reactive functional groups that can have with multipolymer (A) and/or multipolymer (B) have and the reactive functional groups except that carboxyl etc. react.As this multi-functional compounds's example, can mention isocyanic ester based compound, epoxy based compound, amine compound, metallo-chelate based compound, aziridine based compound etc.Especially, isocyanic ester based compound, epoxy based compound, aziridine based compound are preferred.The multi-functional compounds can use separately or multiple being used in combination.
With regard to the isocyanate-based examples for compounds, can mention tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, Xylene Diisocyanate, hydrogenated xylene diisocyanate, diphenylmethanediisocyanate, hydrogenated diphenyl methane diisocyanate, tetramethylxylene diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, polyisocyanate compounds such as polymethylene multi-phenenyl isocyanate, and the adduct of polyol compounds such as these polyisocyanate compounds and TriMethylolPropane(TMP), the biuret product of these polyisocyanate compounds and isocyanuric acid ester products etc. further can be mentioned these polyisocyanate compounds and known polyether glycol and polyester polyol, the acrylic acid or the like polyvalent alcohol, polybutadiene polyol, the adduct of polyisoprene polyvalent alcohol etc. etc.
Also have, example as the epoxy based compound, can mention that dihydroxyphenyl propane-Epicholorohydrin type epoxy is a resin, ethylene glycol diglycidylether, polyethyleneglycol diglycidylether, glycerin diglycidyl ether, T 55,1, the 6-hexanediol diglycidyl ether, ト リ チ ロ one Le propane triglycidyl ether, diglycidylaniline, N, N, N ', N '-four glycidyl group-m-dimethylphenylene diamine, 1, two (the N of 3-, N '-diglycidyl amino methyl) hexanaphthene, N, N, N ', N '-four glycidyl group aminophenyl methane, triglycidyl group etc.
Also have, the example of aziridine cpd can be mentioned N, N '-ditan-4,4 '-two (1-aziridine carboxides), N, N '-Toluene-2,4-diisocyanate, 4-two (1-aziridine carboxide), two isophthaloyl-1-(2-methylaziridine), three-1-'-aziridino phosphine oxide, N, N '-hexa-methylene-1,6-two (1-aziridine carboxide), trimethylolpropane tris-β-'-aziridino propionic ester, tetramethylol methane-β-'-aziridino propionic esters, three-2,4,6-(1-'-aziridino)-1,3,5-triazines etc.
The kind of the reactive functional groups that multi-functional compounds's (C) functional group can be had according to aforementioned multipolymer (A) and/or aforementioned multipolymer (B) is suitably selected.Such as, when the reactive functional groups that aforementioned multipolymer (A) and/or aforementioned multipolymer (B) are had is hydroxyl, multi-functional compounds (C) can have isocyanate group as functional group, when the reactive functional groups that aforementioned multipolymer (A) and/or aforementioned multipolymer (B) are had was carboxyl, multi-functional compounds (C) has epoxy group(ing) or '-aziridino is preferred as functional group.
With respect to aforementioned multipolymer (A) 100 weight parts, multi-functional compounds's (C) content is the 0.003-3 weight part.When multi-functional compounds's (C) content did not reach 0.003 weight part, the aggregation force deficiency of tinting material was easy to generate foaming and phenomenon such as floats off.Also have, when surpassing 3 weight parts, fully absorb and the character that relax because of the flexible stress concentration phenomenon that causes of polaroid is to be difficult to acquisition.
It is preferred being used in combination silane coupling agent in the tackiness agent.As silane coupling agent, can mention vinyltrimethoxy silane, vinyltriethoxysilane, the metacryloxy propyl trimethoxy silicane, γ-metacryloxy propyl group methyl dimethoxysilane, γ-Huan Yangbingyangbingjisanjiayangjiguiwan, γ-epoxypropoxy methyl dimethoxysilane, γ-epoxypropoxy methyldiethoxysilane, 2-(3,4-epoxy group(ing) cyclohexyl) ethyl trimethoxy silane, the gamma-amino propyl trimethoxy silicane, γ-An Jibingjisanyiyangjiguiwan, gamma-amino propyl group methyl methoxy base silane N-(2-amino-ethyl)-3-aminopropyl methoxy silane, N-(2-amino-ethyl) 3-aminopropyl methyl dimethoxysilane, γ-Qiu Jibingjisanjiayangjiguiwan, γ-sulfydryl propyl-triethoxysilicane, sulfydryl butyl trimethoxy silane γ-sulfydryl propyl group methyl dimethoxysilane etc.
With respect to multipolymer (A) 100 weight parts, the content of silane coupling agent is that 0.01～2 weight part is preferred in the tackiness agent.Than 0.01 weight part more after a little while, improve the effect deficiency of physicals, when surpassing 2 weight parts, not only the tackiness agent cost is high but also can produce and float off phenomenon.
Also have, be used in combination UV light absorber, antioxidant, tackifying resin, softening agent, defoamer, flow agent in the tackiness agent and also be fine.
Tackiness agent of the present invention can use
(1) aforementioned multipolymer (A) and multipolymer (B) and
(2) multi-functional compounds (C)
The form of two-pack type tackiness agent.
This tackiness agent can be made by following operation (1)-(3):
(1) makes the monomer (a) that has reactive functional groups and ethylenical unsaturated double bonds and the monomer (b) that can copolyreaction take place with aforementioned multipolymer (a) and have other a ethylenical unsaturated double bonds press transformation efficiency 50-90% generation free radicals copolymerization reaction and the operation of polymerization multipolymer (A); Monomer residual when (2) making multipolymer (A) polymerization is pressed transformation efficiency 70-100% generation free radicals copolymerization reaction and the operation of polymerization multipolymer (B) with the monomer (c) that has carboxyl and ethylenical unsaturated double bonds in the presence of multipolymer (A);
(3) add the operation of the multi-functional compounds (C) with at least two reactive functional groups that can react with multipolymer (A) and/or multipolymer (B).
In the tackiness agent that obtains by aforementioned manufacture method, aforementioned multipolymer (B) contains the carboxyl that comes from monomer (c), so the tackiness agent that the present invention obtained shows excellent physicals on adhesive interface, is not easy to produce and floats and phenomenon such as peel off.And, monomer (a) completely consumed in operation (1) is fallen, do not have residual, when so even used monomer (a) contains carboxyl as reactive functional groups in the aforementioned operation (1), also be necessary to contain the monomer (c) of carboxyl, and in multipolymer (B), introduce carboxyl by interpolation in operation (2).Also have, if not completely consumed but left behind in aforementioned operation (1) of used monomer (b) in the aforementioned operation (1), interpolation monomer (d) is just dispensable in operation (2) so.
By controlling the kind and the consumption of their employed polymerization starters when carrying out copolyreaction, can suitably control multipolymer (A) and multipolymer (B) weight-average molecular weight separately.Such as, in aforementioned operation (1), use Diisopropyl azodicarboxylate at the about 50-70 of temperature of reaction ℃ of modulated multipolymer (A), then, adopt solvent (such as toluene) that the resultant of aforementioned operation (1) is diluted, in aforementioned operation (2), adopt 2,2'-Azobis(2,4-dimethylvaleronitrile) at the about 60-80 of temperature of reaction ℃ of modulated multipolymer (B) then, just can form the multipolymer (A) that weight-average molecular weight and weight ratio fall into target zone and the composition of multipolymer (B).
That is, in the composition of multipolymer (A) that aforementioned operation (2) is generated and multipolymer (B), do not have the monomer of remained unreacted in fact, therefore need not pass through special refining step, but itself and multi-functional compounds (C) are reacted.
Then, describe at optics of the present invention.
Optics of the present invention is the optics that obtains by the binder layer that formation at least one face of optics is formed by tackiness agent of the present invention.
Used optics when forming binder layer can be mentioned polarizing coating, phase retardation film, elliptical polarization film, antireflection film, brightness enhancement film etc.
In order to form tackiness agent, can adopt apparatus for coating commonly used.As apparatus for coating, such as mentioning roller upper scraping plate coating machine, mold pressing coating machine, roll-coater, coiling rod coating machine, gravure roll coating machine, reverse roll coater, dip coater, knife coater etc.
Also have, from for absorbing and lax because of the flexible suitable film thickness of stress concentration phenomenon that causes of polaroid, and from economic angle, the preferred 5-100 μ of the build of binder layer m.
Embodiment
The present invention will be described in more detail below to adopt embodiment, but the present invention is not limited to these.And in the following description, umber and % represent weight part and weight % respectively.
Synthesis example 1
In the reaction vessel that has been equipped with agitator, thermometer, reflux exchanger, Dropping feeder and nitrogen input tube, add 150.0 parts of 99.0 parts of n-butylacrylate, 1.0 parts of vinylformic acid 4-hydroxybutyl esters, acetone, 2,2 '-0.06 part of Diisopropyl azodicarboxylate, after the air in this reaction vessel of nitrogen replacement, when stirring, under nitrogen atmosphere, this reaction soln is warmed up to 60 ℃, makes its reaction 5 hours.After reaction finishes, add 0.25 part in 190 parts of toluene and vinylformic acid and 2,2 '-0.50 part of azo two (2, the 4-methyl pentane nitrile), be warmed up to 70 ℃, reacted 6 hours.After the reaction, add 55 parts of toluene, cool to room temperature, the copolymer solution A of acquisition solids content 20.0%.
Synthesis example 2-9
As shown in table 1, except change have reactive functional groups and ethylenical unsaturated double bonds monomer (a), can with (a) take place copolyreaction the monomer with other ethylenical unsaturated double bonds (b), have the kind and consumption of monomer (c) of carboxyl and ethylenical unsaturated double bonds, obtain copolymer solution B～I according to the mode identical with synthesis example 1.
Synthesis example 10
In the reaction unit identical with synthesis example 1, add 163.0 parts of 99.0 parts of butyl acrylate cores, 1.0 parts of vinylformic acid 4-hydroxybutyl esters, ethyl acetate, 2,2 '-0.06 part of Diisopropyl azodicarboxylate, after the air displacement in this reaction vessel is nitrogen, when stirring, under nitrogen atmosphere, this reaction soln is warmed up to 80 ℃, makes its reaction 4 hours.After reaction finishes, add 0.25 part in 176 parts of toluene and vinylformic acid and 2,2 '-0.50 part of azo two (2, the 4-methyl pentane nitrile), be warmed up to 75 ℃, reacted 6 hours.After the reaction, add 57 parts of toluene, cool to room temperature, the copolymer solution J of acquisition solids content 20.0%.
Synthesis example 11
In the reaction unit identical with synthesis example 1, add 150.0 parts of 60.0 parts of butyl acrylate cores, 37.0 parts of 2-ethylhexyl acrylates, 3.0 parts of vinylformic acid 4-hydroxybutyl esters, acetone, 2,2 '-0.06 part of Diisopropyl azodicarboxylate, after the air displacement in this reaction vessel is nitrogen, when stirring, under nitrogen atmosphere, this reaction soln is warmed up to 60 ℃, makes its reaction 5 hours.After reaction finishes, add 0.28 part in 65.0 parts of ethyl acetate and vinylformic acid and 2,2 '-0.06 part of Diisopropyl azodicarboxylate, be warmed up to 60 ℃, reacted 8 hours.After the reaction, add 183 parts of toluene, cool to room temperature, the copolymer solution K of acquisition solids content 20.0%.
Synthesis example 12
In the reaction unit identical with synthesis example 1, add 150.0 parts of 99.0 parts of butyl acrylate cores, 1.0 parts of vinylformic acid 4-hydroxybutyl esters, acetone, 2,2 '-0.06 part of Diisopropyl azodicarboxylate, after the air displacement in this reaction vessel is nitrogen, when stirring, under nitrogen atmosphere, this reaction soln is warmed up to 60 ℃, makes its reaction 3 hours.After reaction finishes, add 0.55 part in 1.1 parts of toluene and vinylformic acid and 2,2 '-1.1 parts of azos two (2, the 4-methyl pentane nitrile), be warmed up to 70 ℃, reacted 7 hours.After the reaction, add 236 parts of toluene, cool to room temperature, the copolymer solution L of acquisition solids content 20.0%.
Synthesis example 13
In the reaction unit identical with synthesis example 1, add 150.0 parts of 99.0 parts of butyl acrylate cores, 1.0 parts of vinylformic acid 4-hydroxybutyl esters, acetone, 2,2 '-0.06 part of Diisopropyl azodicarboxylate, after the air displacement in this reaction vessel is nitrogen, when stirring, under nitrogen atmosphere, this reaction soln is warmed up to 60 ℃, makes its reaction 10 hours.After reaction finishes, add 0.08 part in 198 parts of toluene and vinylformic acid and 2,2 '-0.16 part of azo two (2, the 4-methyl pentane nitrile), be warmed up to 70 ℃, reacted 6 hours.After the reaction, add 51 parts of toluene, cool to room temperature, the copolymer solution M of acquisition solids content 20.0%.
Synthesis example 14
In the reaction vessel identical with synthesis example 1, add 150.0 parts of 99.0 parts of n-butylacrylate, 1.0 parts of vinylformic acid 4-hydroxybutyl esters, acetone, 2,2 '-0.06 part of Diisopropyl azodicarboxylate, after the air displacement in this reaction vessel is nitrogen, when stirring, under nitrogen atmosphere, this reaction soln is warmed up to 60 ℃, makes its reaction 5 hours.After reaction finishes, add 150 parts of toluene, cool to room temperature, the copolymer solution N of acquisition solids content 20.0%.The weight-average molecular weight of multipolymer is 1,610,000, and Mw/Mn is 4.8.
Synthesis example 15
In the reaction vessel identical with synthesis example 1, add 1 part of 99.0 parts of n-butylacrylate, 1.0 parts of vinylformic acid 4-hydroxybutyl esters, 150.0 parts in acetone, alpha-methyl styrene dimer and 2,2 '-2 parts of Diisopropyl azodicarboxylates, after the air displacement in this reaction vessel is nitrogen, when stirring, under nitrogen atmosphere, this reaction soln is warmed up to 70 ℃, makes its reaction 6 hours.After reaction finishes, add 150 parts of toluene, cool to room temperature, the copolymer solution 0 of acquisition solids content 40.0%.The weight-average molecular weight of multipolymer is 2.4 ten thousand, and Mw/Mn is 2.8.
The copolymer solution that obtains at synthesis example 1-13, according to described method before calculate the weight-average molecular weight (Mw) of multipolymer (A), when multipolymer (A) is synthetic transformation efficiency, multipolymer (B) weight-average molecular weight (Mw), when multipolymer (B) is synthetic transformation efficiency and with respect to the ratio of 100 parts of multipolymers of multipolymer (A) (B).The results are shown in Table 1.
Table 1
Multipolymer (A) Multipolymer (B) (B) weight part
Monomer (a) Monomer (b) ??Mw ??(x10 4) Transformation efficiency (%) Monomer (e) ??Mw ??(x10 4) Transformation efficiency (%)
????4-HBA ??AA ??HEA ??HEMA ????BA ??2EHA ????LA ??EA ??Vac Kind Weight part
Synthesis example 1 Polymers soln A ????1.0 ????99.0 ??160 ??75.0 ??AA ??0.25 ??2.5 ????95.0 ????32.0
Synthesis example 2 Polymers soln B ????3.0 ????60.0 ??37.0 ??158 ??72.0 ??AA ??0.84 ??2.2 ????96.0 ????38.5
Synthesis example 3 Polymers soln C ??4.0 ????96.0 ??169 ??78.0 ??MAA ??0.22 ??3.4 ????92.0 ????26.2
Synthesis example 4 Polymers soln D ??2.0 ????70.0 ????28.0 ??172 ??80.0 ??AA ??0.40 ??2.3 ????94.0 ????24.0
Synthesis example 5 Polymers soln E ??5.0 ????75.0 ??20.0 ??143 ??75.0 ??AA ??0.25 ??4.6 ????96.0 ????32.3
Synthesis example 6 Polymers soln F ????2.0 ????93.0 ??5.0 ??135 ??73.0 ??AA ??0.27 ??2.9 ????95.0 ????35.5
Synthesis example 7 Polymers soln G ??2.0 ????98.0 ??129 ??74.0 ??MAA ??0.52 ??2.4 ????91.0 ????32.6
Synthesis example 8 Polymers soln H ????1.0 ????99.0 ??165 ??75.0 ??なし ??0.25 ??2.7 ????96.0 ????32.3
Synthesis example 9 Polymers soln I ????1.0 ????96.0 ??169 ??78.0 ??4-HBA ??0.22 ??2.8 ????91.0 ????25.9
Synthesis example 10 Polymers soln J ????1.0 ????99.0 ??70 ??75.0 ??AA ??0.25 ??2.6 ????94.0 ????31.6
Synthesis example 11 Polymers soln K ????3.0 ????60.0 ??37.0 ??158 ??72.0 ??AA ??0.28 ??27.6 ????97.0 ????38.1
Synthesis example 12 Polymers soln L ????1.0 ????99.0 ??156 ??45.0 ??AA ??0.55 ??2.4 ????93.0 ????114.8
Synthesis example 13 Polymers soln M ????1.0 ????99.0 ??160 ??92.0 ??AA ??0.08 ??2.7 ????95.0 ????8.3
Monomeric breviary meaning is as follows in the table 1:
4-HBA:4 vinylformic acid-hydroxybutyl ester
AA: vinylformic acid
HEA: vinylformic acid 2-hydroxyethyl ester
HEMA: methacrylic acid 2-hydroxyethyl ester
BA: butyl acrylate cores
2EHA: 2-ethylhexyl acrylate
LA: vinylformic acid Lauryl Ester
EA: vinylformic acid ethyl ester
VAc: vinyl-acetic ester
And the weight-average molecular weight of multipolymer is the polystyrene conversion weight-average molecular weight that the GPC method records, and the GPC condition determination is as follows:
Device: Shodex GPC System-21 (clear and electrician's (share) company makes)
Post: 1 Shodex KF-602.5,2 Shodex KF-606M (clear and electrician's (share) company makes) amount to 3 uses that link to each other.
Solvent: tetrahydrofuran (THF)
Flow velocity: 0.5ml/min
Temperature: 40 ℃
Sample solution concentration: 0.1 weight %
Sample injection rate: 50 μ l
Embodiment 1
Polymers soln A with respect to 1 acquisition of 100 weight part synthesis examples, add 0.1 part of 0.05 part of XDI/TMP (the TriMethylolPropane(TMP) adduct of Xylene Diisocyanate) and silane coupling agent (SHIN-ETSU HANTOTAI's chemical industry (share) company manufacturing [KBM 403]), fully stir and obtain tackiness agent.This adhesive coated is on the polyester film of crossing through lift-off processing, dry then, obtained the binder layer of 25m, then it is transferred on the face of polarizing coating, carry out the adhesion process of polarizing coating.Make polarizing coating 1 week of slaking under the condition of 23 ℃ of relative humidity 50% of temperature of this adhesion process, obtain polaroid.
Embodiment 2-7 and comparative example 1-7
Except the polymers soln, multi-functional compounds (C) and the silane coupling agent that adopt kind shown in the table 2 and consumption, according to making tackiness agent with embodiment 1 identical method, the tackiness agent manufacturing that use is obtained is through the polaroid of adhesion process.
Comparative example 8
Except not adopting polymers soln A, but adopt beyond the mixed polymer solution of polymers soln N:100 part and polymers soln 0:30 part, according to making tackiness agent with embodiment 1 identical method, the tackiness agent manufacturing that employing is obtained is through the polaroid of adhesion process.
Table 2
Polymers soln Multi-functional compounds (C) Silane coupling agent
Kind Weight part Kind Weight part Kind Weight part
Embodiment 1 Polymers soln A ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
Embodiment 2 Polymers soln B ????100.0 ??TAT ????0.10 ????KBM403 ????0.10
Embodiment 3 Polymers soln C ????100.0 ??TGMXDA ????0.05 ????KBM903 ????0.20
Embodiment 4 Polymers soln D ????100.0 ??XDI/TMP ????0.10 ????KBM803 ????0.10
Embodiment 5 Polymers soln E ????100.0 ??TGMXDA ????0.05 ????KBM9007 ????0.10
Embodiment 6 Polymers soln F ????100.0 ??TAT ????0.05 ????KBM403 ????0.20
Embodiment 7 Polymers soln G ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
Comparative example 1 Polymers soln H ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????010
Comparative example 2 Polymers soln I ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
Comparative example 3 Polymers soln J ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
Comparative example 4 Polymers soln K ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
Comparative example 5 Polymers soln L ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
Comparative example 6 Polymers soln M ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
Comparative example 7 Polymers soln N ????100.0 ??XDI/TMP ????0.05 ????KBM403 ????0.10
The breviary meaning of multi-functional compounds in the table 2 and silane coupling agent as follows.
TAT: three-2,4,6-(1-'-aziridino)-1,3,5-triazines
TGMXDA:N, N, N ', N '-four glycidyl group-ask dimethylphenylene diamine
KBM903: the silane coupling agent [KBM903] that SHIN-ETSU HANTOTAI's chemical industry (share) company makes
KBM803: the silane coupling agent [KBM803] that SHIN-ETSU HANTOTAI's chemical industry (share) company makes
KBM9007: the silane coupling agent [KBM9007] that SHIN-ETSU HANTOTAI's chemical industry (share) company makes
At tackiness agent that embodiment and comparative example obtained with through the polaroid of adhesion process, estimate its thermotolerance, humidity resistance, optical characteristics and retry in accordance with the following methods.The results are shown in Table 3.
(1) evaluation method of thermotolerance, humidity resistance, optical characteristics (hickie)
To cut into 150mm * 80mm size through the polaroid of adhesion process, the mode that intersects vertically according to the absorption axes that makes polaroid sticks on the two sides of float glass plate that thickness is 1.1mm with laminating machine then.Then, under 5 atmospheric pressure, in autoclave, keeping 20 minutes under 50 ℃, polaroid and sheet glass are adjacent to the sheet glass of having pasted this polaroid.Further, the molectron of visual observations polaroid and sheet glass is the 80 ℃ of degree that floats off (thermotolerance), the degree that floats off (humidity resistance) after 60 ℃ of relative humidity are placed 500 hours 90% time and light leak degree (hickie) that produce during when the molectron of light transmission polaroid and sheet glass after 60 ℃ of relative humidity are placed 500 hours 90% time after down placing 500 hours, and this evaluation is divided into Three Estate.
◎ represents [do not observe fully and float off and the hickie phenomenon], zero the representative [observe a little floating off and the hickie phenomenon, but actual use no problem], △ represents [observe and significantly float off and the hickie phenomenon the actual problem that used].
(2) evaluation method of retry
To cut into 25mm * 150mm size through the polaroid of adhesion process, and use laminating machine to stick on the float glass of thickness as 1.1mm, and, it will be adjacent on sheet glass under 5 atmospheric pressure, in autoclave, keeping 20 minutes under 50 ℃.This test film after 23 ℃ and relative humidity placed for 1 week 50% time, is carried out 180 ° of stripping tests (peeling rate 300mm/min), and visual observations is peeled off the fog-level of back glass, and this evaluation is divided into two grades.
◎ represents [actual use is no problem fully], and △ represents [problem is arranged during actual the use].
(3) evaluation method of optical characteristics (mist degree)
Adhesive coated is on the polyester film of lift-off processing, dry then, form the binder layer of 25 μ m, and then cover with polyester film through lift-off processing.Make binder layer 1 week of slaking under the condition of 23 ℃ of temperature and relative humidity 50% that is clipped in the middle by polyester film through lift-off processing, take off polyester film afterwards, adopt NDH-300A (manufacturing of Japanese electric look industry (share) company) to measure the mist degree of binder layer self through lift-off processing.
Table 3
Thermotolerance floats off Humidity resistance floats off Optics commentaries on classics property The retry adherend pollutes
Hickie Mist degree
Embodiment 1 ????◎ ??◎ ????◎ ????1.2 ??◎
Embodiment 2 ????◎ ??◎ ????◎ ????1.2 ??◎
Embodiment 3 ????◎ ??○ ????◎ ????1.3 ??◎
Embodiment 4 ????○ ??◎ ????◎ ????1.3 ??◎
Embodiment 5 ????◎ ??○ ????◎ ????1.4 ??◎
Embodiment 6 ????◎ ??◎ ????○ ????1.4 ??◎
Embodiment 7 ????◎ ??○ ????◎ ????1.2 ??◎
Comparative example 1 ????○ ??△ ????◎ ????1.3 ??◎
Comparative example 2 ????◎ ??◎ ????△ ????1.3 ??◎
Comparative example 3 ????△ ??△ ????◎ ????1.3 ??◎
Comparative example 4 ????◎ ??◎ ????△ ????1.5 ??◎
Comparative example 5 ????△ ??△ ????◎ ????1.3 ??△
Comparative example 6 ????◎ ??◎ ????△ ????1.2 ??◎
Comparative example 7 ????◎ ??◎ ????△ ????1.2 ??◎
Comparative example 8 ????◎ ??◎ ????○ ????1.7 ??△
The effect of invention
By adopting tackiness agent of the present invention, though just can provide under heat or wet heat condition, do not produce foaming yet and phenomenon such as float off, by making the stress concentration phenomenon that produces because of polaroid is flexible etc. obtain relaxing to make the optics that does not produce phenomenons such as the inhomogeneous and hickie of color on the liquid crystal indicator.

Claims (6)

1. tackiness agent, it comprises following component: multipolymer (A), it forms by free radicals copolymerization reaction by following monomer (a) with (b), its weight-average molecular weight is at least 100 ten thousand at the most 2,000,000, multipolymer (B) 20-100 weight part with respect to this multipolymer (A) 100 weight parts, it forms by free radicals copolymerization reaction in the presence of aforementioned multipolymer (A) by following monomer (c) with (d), its weight-average molecular weight at least 1 ten thousand at the most 100,000, and multi-functional compounds (C) the 0.003-3 weight part that has at least two reactive functional groups that can react with aforementioned multipolymer (A) and/or aforementioned multipolymer (B)
(a) have the monomer of reactive functional groups and ethylenical unsaturated double bonds,
(b) can copolyreaction take place with aforementioned multipolymer (a) and have the monomer of the ethylenical unsaturated double bonds different with aforementioned multipolymer (a),
(c) have the monomer of carboxyl and ethylenical unsaturated double bonds,
(d) can copolyreaction take place with aforementioned multipolymer (c) and have the monomer of the ethylenical unsaturated double bonds different with aforementioned multipolymer (c).
2. the tackiness agent of claim 1, the copolymerization ratio that wherein constitutes the monomer (a) of multipolymer (A) is 0.1-15 weight %, the copolymerization ratio of monomer (b) is 85-99.9 weight %.
3. the manufacture method of tackiness agent, it comprises following operation (1)-(3),
(1) make the monomer (a) that has reactive functional groups and ethylenical unsaturated double bonds press transformation efficiency 50-90% generation free radicals copolymerization reaction and the operation of polymerization multipolymer (A) with the monomer (b) that can copolyreaction take place with aforementioned multipolymer (a) and have an ethylenical unsaturated double bonds different with aforementioned multipolymer (a);
Monomer residual when (2) making multipolymer (A) polymerization issues living free radicals copolymerization reaction and the operation of polymerization multipolymer (B) with the monomer (c) that has carboxyl and ethylenical unsaturated double bonds in multipolymer (A) existence;
(3) add the operation of the multi-functional compounds (C) with at least two reactive functional groups that can react with multipolymer (A) and/or multipolymer (B).
4. the tackiness agent manufacture method of claim 3, wherein in operation (2), monomer residual when making multipolymer (A) polymerization is pressed transformation efficiency 70-100% generation free radicals copolymerization reaction and polymerization multipolymer (B) with the monomer (c) that has carboxyl and ethylenical unsaturated double bonds.
5. the tackiness agent made of claim 3 or 4 method.
6. optics, it is characterized in that at least one face of this optics, having formed have claim 1, the binder layer of 2 or 5 tackiness agent.
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