CN108624252A - Surface protection film - Google Patents

Abstract

The present invention relates to surface protection films.The present invention provides the optics surface protection film that a kind of transmission of ultraviolet rays is low, inhibits tone variations, adhesion stability excellent.The optics surface protection film of the present invention has the adhesive phase of the base material formed by polyester resin and the single side for being set to the base material formed by adhesive composition; it is characterized in that; the b* values of the surface protection film are 2 or less; transmissivity when the wavelength 365nm of the surface protection film is 2% or less; after described adhesive layer is pasted onto on glass, bonding force after being heated 30 minutes at 100 DEG C is ± 30% or less relative to the change rate of the bonding force before heating.

Description

Surface protection film

Technical field

The present invention relates to optics surface protection films.Especially as protecting optical component (for example, being used for liquid crystal Show the polarization plates, wave plate, phase plate, optical compensation films, reflector plate, brightness enhancement film, display protective glass etc. of device etc.) table Face protects that be easy optics that the component of deterioration etc. is influenced from ultraviolet light with surface protection film be useful because ultraviolet light irradiates 's.

Background technology

Protective film usually has the composition that adhesive phase is provided on film-like substrate.The guarantor is used for the following purposes Cuticula：The optical component as adherend is fitted in via described adhesive layer, thus protects optical component from adding The damage on surface whens when work, transport, inspection etc., spot.For example, the panel of liquid crystal display is by by polarization plates, wave plate Equal optical components fit in liquid crystal cells via adhesive phase and form (patent document 1).

For protective film, visual examination etc. is carried out to it in the state ofs fitting in optical component etc. sometimes, therefore It is required that it can prevent tone variations discolorations such as () reddening of protective film by the time.

In addition, the liquid crystal enclosed in the liquid crystal cells for the panel of liquid crystal display is deteriorated because of ultraviolet light, Therefore it is bonded on the components such as the polarization plates for fitting in liquid crystal cells and uses the protective film with ultraviolet radiation absorption function.

In addition, in recent years, in the protective glass of the mobile terminals such as manufacture slimming smart mobile phone, tablet computer, using Fitting operation is carried out by resin that the active-energy of ultraviolet light, heat etc. is cured, but does not need ultraviolet light photograph sometimes It penetrates, using the component deteriorated by ultraviolet light, in order to protect such component, uses the protection comprising ultra-violet absorber Film.

Used protective film will no longer need the stage of protective film to be stripped removal, but be pasted to remove removal In the protective film on the protective glass used in being thinned smart mobile phone etc., for due tos ultraviolet light, heat etc. bonding force increase Protective film for, it is difficult to easily removed removal, cause the breakage etc. of protective glass sometimes.

Existing technical literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2007-304425 bulletins

Invention content

Problem to be solved by the invention

Therefore, the inventors of the present invention have made intensive studies in view of the foregoing, as a result the purpose of the present invention is to provide The optics surface protection film that a kind of ultraviolet transmittance is low, inhibits tone variations, adhesion stability excellent.

The means used to solve the problem

That is, the optics surface protection film of the present invention has the base material formed by polyester resin and is set to the base The adhesive phase of the single side of material formed by adhesive composition, optics surface protection film of the invention be characterized in that, institute The b* values for stating surface protection film are 2 hereinafter, the transmissivity when wavelength 365nm of the surface protection film is 2% hereinafter, will be described After adhesive phase is pasted onto on glass, the bonding force after being heated 30 minutes at 100 DEG C is relative to the bonding force before heating Change rate is ± 30% or less.

For the optics surface protection film of the present invention, preferably described adhesive composition contains ultraviolet radiation absorption Agent.

For the optics surface protection film of the present invention, the hydroxyl of the intramolecular of the preferably described ultra-violet absorber is 3 or less.

For the optics surface protection film of the present invention, preferably described adhesive composition contains (methyl) acrylic acid Type of Collective object and/or polyurethane polymer are as basic polymer.

For the optics surface protection film of the present invention, relative to 100 parts by weight of the base polymer, preferably institute State the ultra-violet absorber that adhesive composition contains the parts by weight of 0.1 parts by weight~20.

For the optics surface protection film of the present invention, the thickness of the preferably described base material is 6 μm~100 μm, and The thickness of described adhesive layer is 1 μm~30 μm.

By the present invention in that with certain optical properties surface protection film, can obtain transmission of ultraviolet rays it is low, The optics surface protection film for inhibiting tone variations, adhesion stability excellent, therefore be useful.

Specific implementation mode

Hereinafter, the embodiment of the present invention will be described in detail.

The overall structure ＞ of ＜ optics surface protection films

Optics disclosed herein is commonly referred to as gluing with surface protection film (hereinafter, sometimes referred to simply as " surface protection film ") The film that the adhesive layer surface of the forms such as crossed belt, adhesive label, bonding film is protected by partition is especially suitable as in optical section The processing of part (for example, optical component as the liquid crystal display panels constituent element such as polarization plates, wave plate, protective glass), inspection, The surface protection film of optical component surfaces is protected when transport.Adhesive phase in the surface protection film is typically continuous landform At, but it is not limited to such form, such as can also be the bonding for being formed as the rule such as dotted, striated or irregular pattern Oxidant layer.In addition, surface protection film disclosed herein can be scroll-like, or sheet (piece Leaf shapes).

＜ base materials ＞

The optics surface protection film of the present invention is characterized in that thering is the base material formed by polyester resin.It is described There is the preferred of the base material as surface protection film such as optical characteristics, excellent in dimensional stability by the base material that polyester resin is formed Characteristic.

It can it is preferable to use by using polyethylene terephthalate (PET), the poly- naphthalene two as the polyester resin Formic acid glycol ester (PEN), polybutylene terephthalate (PBT) etc. have the polyester polymer material of the main framing based on ester bond Expect (polyester resin) as principal resinous ingredients (main component in resin component, typically account for 50 weight % or more at Point) resin material constitute base material as the base material.As other resin materials in addition to the polyester resin For, it can enumerate with styrenic polymers such as polystyrene, acrylonitritrile-styrene resins；Polyethylene, polypropylene, tool There are the olefin polymers such as cyclic annular or norbornene structure polyolefin, ethylene-propylene copolymer；Vinyl chloride polymer；Buddhist nun The example as resin material such as acylamide polymers such as dragon 6, nylon 6,6, aromatic polyamide.As the resin material In addition other examples can enumerate acid imide polymer, sulfone Type of Collective object, polyether sulfone polymer, polyether-ether-ketone and birds of the same feather flock together Close object, polyphenylene sulfide ether polymer, vinyl alcohol polymer, vinylidene chloride Type of Collective object, vinyl butyral Type of Collective object, Aryl nitrone polymer, polyformaldehyde Type of Collective object, epoxide polymer etc..Can also be being total to comprising two or more above-mentioned polymer The base material of mixed object.

It can coordinate antioxidant, ultra-violet absorber, plasticising as needed in the resin material for constituting the base material The various additives such as agent, colorant (pigment, dyestuff etc.).Such as Corona discharge Treatment, corona treatment, ultraviolet can be implemented It is surface-treated known in line treatment with irradiation, sour processing, alkali process, silane coupling agent coating etc. or commonly.Such surface treatment is for example It can be the processing of the adhesiveness (anchoring of adhesive phase) for improving base material and adhesive phase.

As the base material, the base material for implementing antistatic process can also be used.By using the base material, can press down The electrification of surface protection film itself when system stripping, is therefore preferred.In addition, by implementing at antistatic to the base material Reason can reduce the electrification of surface protection film itself and obtain the base material excellent to the anti-static ability of adherend.It needs It is bright, it for the method for assigning anti-static function, is not particularly limited, existing known method, Ke Yilie can be used Citing is such as：Coating includes antistatic agent and the static electricity resistance resin of resin component, conducting polymer, the conduction containing conductive materials The method of resin；The method etc. of the method and kneading antistatic agent etc. of vapor deposition or plated conductive substance.

For thickness as the base material, preferably 6 μm~100 μm, more preferably 10 μm~60 μm, further preferably It is 15 μm~40 μm.When the thickness of the base material is in the range, fitting workability to adherend and from adherend Fissility, workability are excellent, are therefore preferred.

Surface protection film disclosed herein can also be real in a manner of including also other layers in addition to base material and adhesive phase It applies.For other layers, the priming coat (anchor layer) for the anchoring for improving antistatic backing, adhesive phase can be enumerated Deng.In addition, for the purpose of protection adhesive layer surface, partition can also be pasted.

＜ adhesive phases ＞

The optics surface protection film of the present invention is characterized in that, is arranged by adhesive by the single side in the base material Composition formed adhesive phase and formed.As long as the adhesive phase used in the present invention is by containing the adhesiveness with adhesiveness The adhesive composition of polymer is formed, so that it may to use without particular limitation.For described adhesive composition, example Acrylic adhesives can such as be used, polyurethane binding, synthetic rubber class adhesive, natural rubber based binder, gathered Silicone Adhesives, polyester adhesive etc., wherein as basic polymer, it is preferable to use containing (methyl) acrylic compounds The adhesive composition of polymer and/or polyurethane polymer.

＜ acrylic adhesives ＞

In the case where described adhesive layer uses acrylic adhesives, it will be used as and constitute the acrylic adhesives Binding property polymer (methyl) acrylic polymer as basic polymer, as the raw material for constituting the base polymer Monomer can use (methyl) acrylic monomer of the alkyl with carbon atom number 1~14 as main monomer.As described For (methyl) acrylic monomer, one or more can be used.By using it is described have carbon atom number be 1~14 Alkyl (methyl) acrylic monomer, be easy the peeling force of adherend (by protective) (bonding force) will be controlled compared with It is low, the excellent surface protection film of light fissility, releasable can be obtained.It should be noted that (methyl) third in the present invention Alkene acids polymers refer to acrylic polymer and/or methacrylic polymer, in addition, (methyl) acrylate refers to Acrylate and/or methacrylate.

The specific example of (methyl) acrylic monomer as the alkyl with carbon atom number 1~14, Ke Yilie Citing is such as：(methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) n-butyl acrylate, (methyl) acrylic acid Zhong Ding Ester, (methyl) tert-butyl acrylate, (methyl) isobutyl acrylate, (methyl) Hexyl 2-propenoate, (methyl) acrylic acid 2- ethyls Own ester, (methyl) n-octyl, (methyl) Isooctyl acrylate monomer, the positive nonyl ester of (methyl) acrylic acid, (methyl) acrylic acid are different Nonyl ester, the positive last of the ten Heavenly stems ester of (methyl) acrylic acid, (methyl) isodecyl acrylate, (methyl) acrylic acid n-dodecane base ester, (methyl) third Olefin(e) acid n-tridecane base ester, (methyl) n-myristyl base ester etc..

Wherein, in the surface protection film of the present invention, (methyl) n-butyl acrylate, (methyl) third can especially be enumerated The own ester of olefin(e) acid, (methyl) 2-EHA, (methyl) n-octyl, (methyl) Isooctyl acrylate monomer, (methyl) The positive nonyl ester of acrylic acid, the different nonyl ester of (methyl) acrylic acid, the positive last of the ten Heavenly stems ester of (methyl) acrylic acid, (methyl) isodecyl acrylate, (methyl) Acrylic acid n-dodecane base ester, (methyl) acrylic acid n-tridecane base ester, (methyl) n-myristyl base ester etc. have carbon (methyl) acrylic monomer of the alkyl of atomicity 4~14 is as suitable monomer.Especially by using with carbon atom (methyl) acrylic monomer of the alkyl of number 4~14 is easy to control relatively low to the peeling force of adherend (bonding force), at For the adhesive phase that releasable is excellent.

Particularly, relative to the 100 weight % of monomer component total amount of (methyl) acrylic polymer described in composition, preferably (methyl) acrylic monomer of the alkyl with carbon atom number 1~14 containing 65 weight % or more, more preferably 75 weights Measure % or more, the further preferably 85 weight % of weight %~99.9, particularly preferably 90 weight of weight %~99 %.Less than 65 When weight %, wetability, the cohesiveness of adhesive phase of the appropriateness of adhesive composition are deteriorated, therefore not preferably.

In addition, (methyl) acrylic polymer can use (methyl) acrylic monomer of hydroxyl as former Material list body.(methyl) acrylic monomer of the hydroxyl can use one or more.Contain hydroxyl by using described (methyl) acrylic monomer of base, is easy to control the crosslinking etc. of adhesive composition, so be easy to control by fluxion strap Lai The balance of the reduction of peeling force (bonding force) when the improvement and stripping of wetability.

For (methyl) acrylic monomer of the hydroxyl, it can enumerate for example：(methyl) acrylic acid 2- hydroxyls Base ethyl ester, (methyl) acrylic acid 2- hydroxy propyl esters, (methyl) acrylic acid 4- hydroxybutyls, the own ester of (methyl) acrylic acid 6- hydroxyls, (methyl) acrylic acid 8- hydroxyls monooctyl ester, (methyl) acrylic acid 10- hydroxyls last of the ten Heavenly stems ester, (methyl) acrylic acid 12- hydroxylaurics ester, propylene Sour (4- hydroxymethylcyclohexyls) methyl esters, N- methylols (methyl) acrylamide etc..

Relative to the 100 weight % of monomer component total amount of (methyl) acrylic polymer described in composition, 25 are preferably comprised (methyl) acrylic monomer of the weight % hydroxyls below, more preferably 15 weight % are hereinafter, further preferably The 0.1 weight % of weight %~10, particularly preferably 1 weight of weight %~5 %.When in the range, it is easy to control bonding The balance of the wetability of agent composition and the cohesiveness of obtained adhesive phase, therefore preferably.

In addition, as other polymerizable monomer ingredients, consider from the reasons why balance for being easy to get bond properties, it can be with Within the scope of the effect of the invention using for adjust the glass transition temperature of (methyl) acrylic polymer with So that Tg is the polymerizable monomer of 0 DEG C or less (being usually -100 DEG C or more), the polymerizable monomer etc. for adjusting fissility.

In addition, (methyl) acrylic polymer can use carboxylic (methyl) acrylic monomer as former Material list body.By using carboxylic (methyl) acrylic monomer, adhesive phase (surface protection film) can be inhibited Bonding force increases by the time, and releasable, anti-bonding force are ascending and workability is excellent.In addition, not only adhesive phase Cohesiveness is excellent, and shearing force is also excellent, therefore preferably.

For carboxylic (methyl) acrylic monomer, such as (methyl) acrylic acid, (first can be enumerated Base) carboxyethyl acrylates, (methyl) acrylic acid carboxyl pentyl ester etc..

Relative to the 100 weight % of monomer component total amount of (methyl) acrylic polymer described in composition, preferably make described Carboxylic (methyl) acrylic monomer is 10 weight % hereinafter, more preferably 0~8 weight %, further preferably 0~6 Weight %.When in the range, it is easy to control the cohesion of the wetability and obtained adhesive phase of adhesive composition The balance of power, therefore preferably.

In addition, (methyl) as long as acrylic polymer in the range of not damaging characteristic of the present invention, so that it may with not Use other polymerizable monomers in addition to the starting monomer with being particularly limited.For example, as other polymerisms Monomer can be properly used：It is resistance to that monomer, vinyl ester monomers, aromatic vinyl monomer of cyano-containing etc. improve cohesiveness Hot ingredient；The monomer of amide-containing, the monomer containing imide, amino-containing monomer, the monomer containing epoxy group, N- propylene Morpholide, vinyl ether monomers etc. improve peeling force (bonding force) or with the functional group for playing the role of Cross-linked basic point at Point.Wherein, it is preferable to use the monomer of cyano-containing, the monomer of amide-containing, the monomer containing imide, amino-containing monomer and The nitrogenous monomer such as N- acryloyl morpholines.By using nitrogenous monomer, it can be ensured that do not generate the appropriateness of tilting, stripping etc. Peeling force (bonding force), and then the excellent surface protection film of shearing force can be obtained, therefore be useful.These polymerizable monomers One or more can be used.

For monomer as the cyano-containing, such as acrylonitrile, methacrylonitrile can be enumerated.

For monomer as the amide-containing, it can enumerate for example：Acrylamide, Methacrylamide, diethyl Acrylamide, n-vinyl pyrrolidone, N, N- dimethacrylamide, N, N- dimethylmethacryl amides, N, N- diethyls Base acrylamide, N, N- diethyhnethacrylamides, N, N '-methylene-bisacrylamides, N, N- dimethylaminopropyls third Acrylamide, N, N- dimethylaminopropyls Methacrylamide, Diacetone Acrylamide etc..

For the monomer containing imide, it can enumerate for example：N-cyclohexylmaleimide, isopropyl Malaysia Acid imide, N- N-cyclohexylmaleimides, clothing health acid imide etc..

For the amino-containing monomer, it can enumerate for example：(methyl) acrylate, (methyl) propylene Sour N, N- dimethylamino ethyl ester, (methyl) acrylic acid N, N- dimethylamino propyl ester etc..

For the vinyl ester monomers, it can enumerate for example：Vinyl acetate, vinyl propionate, lauric acid second Enester etc..

For the aromatic vinyl monomer, it can enumerate for example：Styrene, chlorostyrene, chloromethylbenzene second Alkene, α-methylstyrene, other substituted phenylethylenes etc..

For the monomer containing epoxy group, it can enumerate for example：(methyl) glycidyl acrylate, (methyl) Acrylic acid methylglycidyl esters, allyl glycidyl ether etc..

For the vinyl ether monomers, it can enumerate for example：Methyl vinyl ether, ethyl vinyl ether, isobutyl Base vinyl ethers etc..

In the present invention, relative to the 100 weight % of monomer component total amount of (methyl) acrylic polymer described in composition, institute It is preferably 0~30 weight % to state other polymerizable monomers, more preferably 0~10 weight %.Desired characteristic in order to obtain, It can be suitably adjusted other polymerizable monomers.

(methyl) acrylic polymer can also contain (the ア Le キ レ Application オ キ シ of group containing alkylene oxide De base) reactive monomer as monomer component.

In addition, from from the viewpoint of the compatibility of the compound containing oxyalkylene, the group containing alkylene oxide The average addition molal quantity of oxygen alkylidene unit of reactive monomer be preferably 1~40, more preferably 3~40, it is further excellent It is selected as 4~35, particularly preferably 5~30.In the case where the average addition molal quantity is 1 or more, having can be efficiently It is reduced the tendency of the effect of the pollution of adherend (by protective).In addition, in the average addition molal quantity more than 40 In the case of, big with the interaction of the compound containing oxyalkylene, the viscosity with adhesive composition, which increases to apply, to be become Difficult tendency, therefore not preferably.It should be noted that the end of oxyalkylene chain can be hydroxyl original sample, it can also be by it The substitutions such as its functional group.

The reactive monomer of the group containing alkylene oxide can be used alone, can also be used in mixed way two kinds with On, the list of the content of the reactive monomer entirety of the group containing alkylene oxide in (methyl) acrylic polymer It is preferably 0~20 weight %, more preferably 0~10 weight % in body ingredient total amount.The reactivity of the group containing alkylene oxide When the content of monomer is more than 20 weight %, it is deteriorated to the pollution of adherend, therefore not preferably.

For oxygen alkylidene unit as the reactive monomer of the group containing alkylene oxide, can enumerate has The oxygen alkylidene unit of the alkylidene of carbon atom number 1~6 can be enumerated for example：Oxymethylene, oxygen ethylidene, oxygen propylidene, oxygen Butylidene etc..The alkyl of oxyalkylene chain can be straight chain, or branch.

In addition, the reactive monomer of the more preferably described group containing alkylene oxide is with ethylidene oxide groups The reactive monomer of (エ チ レ Application オ キ シ De base).By using containing the reactive monomer with ethylidene oxide groups (methyl) acrylic polymer as basic polymer, base polymer and the compatibility of the compound containing oxyalkylene carry Height suitably inhibits the exudation to adherend, can obtain the adhesive composition of low stain.

For the reactive monomer of the group containing alkylene oxide, it can enumerate for example：(methyl) acrylic acid Reaction with acryloyl group, methylacryloyl, allyl isoreactivity substituent group in alkylene oxide adduct, molecule Property surfactant etc..

For concrete example as (methyl) the acrylic acid alkylene oxide adduct, it can enumerate for example：Poly- second Glycol (methyl) acrylate, polyethylene glycol propylene glycol (methyl) acrylate, gathers polypropylene glycol (methyl) acrylate Ethylene glycol-polytetramethylene glycol (methyl) acrylate, polypropylene glycol-polytetramethylene glycol (methyl) acrylate, methoxy poly (ethylene glycol) (methyl) acrylate, ethyoxyl polyethylene glycol (methyl) acrylate, butoxy polyethylene glycol (methyl) acrylate, pungent oxygen Base polyethylene glycol (methyl) acrylate, dodecyloxy polyethylene glycol (methyl) acrylate, octadecane epoxide polyethylene glycol (methyl) acrylate, phenoxy group polyethylene glycol (methyl) acrylate, methoxyl group polypropylene glycol (methyl) acrylate, pungent oxygen Base polyethylene glycol propylene glycol (methyl) acrylate etc..

In addition, for concrete example as the reactive surfactant, can enumerate for example：With (methyl) propylene The anionic reactive surfactant of acyl group or allyl, nonionic reactive surfactant, cationic reaction Property surfactant etc..

The weight average molecular weight (Mw) of (methyl) acrylic polymer is preferably 100,000~5,000,000, more preferably 20 Ten thousand~4,000,000, further preferably 300,000~3,000,000, most preferably 300,000~1,200,000.In weight average molecular weight less than 100,000 In the case of, have since the cohesiveness of obtained adhesive phase becomes smaller and generate the tendency of generation of adhesive deposit.On the other hand, in weight In the case that average molecular weight is more than 5,000,000, the mobility of polymer reduces, and has the wetting to adherend (for example, polarization plates) The tendency of the reason of insufficient, as the protuberance generated between adherend and the adhesive phase of surface protection film.It needs to illustrate , weight average molecular weight refers to the molecular weight obtained from GPC (gel permeation chromatograph) is measured.

In addition, the glass transition temperature (Tg) of (methyl) acrylic polymer be preferably 0 DEG C hereinafter, more preferably For -10 DEG C or less (being usually -100 DEG C or more).In the case where glass transition temperature is more than 0 DEG C, polymer is difficult to flow, For example, with to the polarization plates as optical component wetting it is insufficient, as in the adhesive of polarization plates and surface protection film The tendency of the reason of protuberance generated between layer.Particularly, by the way that glass transition temperature is adjusted to -70 DEG C hereinafter, being easy Obtain the adhesive phase excellent to the wetability of polarization plates and light fissility.It should be noted that can be by suitably changing Used monomer component, ratio of components and the glass transition temperature of (methyl) acrylic polymer is adjusted to the range It is interior.

The polymerization of (methyl) acrylic polymer is not particularly limited, and can pass through polymerisation in solution, lotion The known methods such as polymerization, bulk polymerization, suspension polymerisation are polymerize, but are especially from the viewpoint of workability, (are protected to adherend Watch box) the characteristics such as low stain from the aspect of, polymerisation in solution is preferred mode.In addition, obtained polymer can be with It is any one in random copolymer, block copolymer, alternate copolymer, graft copolymer etc..

＜ polyurethane bindings ＞

In the case of using polyurethane binding in described adhesive layer, arbitrarily suitable polyurethane may be used Class adhesive.For such polyurethane binding, can preferably enumerate will make polyalcohol and polyisocyanates chemical combination Adhesive of binding property polymer, the i.e. polyurethane polymer as basic polymer, the polyurethane obtained from object reaction Class adhesive can use the adhesive comprising polyurethane based resin, and the polyurethane based resin is to instigate to contain polyalcohol and more Resin obtained from the composition solidification of isocyanate compound.

For the content ratio of the polyurethane based resin in the polyurethane binding, as lower limiting value, preferably For 40 weight % or more, more preferably 50 weight % or more, further preferably 55 weight % or more, further preferably 60 weights Measure % or more, particularly preferably 65 weight % or more, most preferably 70 weight % or more, as upper limit value, preferably 99.999 Weight % hereinafter, more preferably 99.99 weight % hereinafter, further preferably 99.9 weight % are hereinafter, further preferably 99 Weight % hereinafter, particularly preferably 95 weight % hereinafter, most preferably 90 weight % or less.The polyurethane based resin can be It is only a kind of, or two or more.

In addition, the polyalcohol can be only a kind of, or two or more.

For the polyalcohol, as long as the polyalcohol with 2 or more OH bases, so that it may to be suitble to using arbitrary Polyalcohol.For such polyalcohol, it can enumerate for example：Polyalcohol (dihydric alcohol) with 2 OH bases, with 3 The polyalcohol (trihydroxylic alcohol) of a OH bases, the polyalcohol (tetrahydroxylic alcohol) with 4 OH bases, (five yuan of the polyalcohol with 5 OH bases Alcohol), the polyalcohol (hexahydroxylic alcohols) etc. with 6 OH bases.

In addition, as the polyalcohol, the polyalcohol (trihydroxylic alcohol) with 3 OH bases preferably may be used.In this way, passing through Polyalcohol is used as using the polyalcohol (trihydroxylic alcohol) with 3 OH bases, such as the fast adhesive phase of wetting speed can be made, is led to It crosses and is combined with the specific base material used in the present invention, be capable of providing damage, the higher surface of the mixed recall rate of impurity Protective film.The content ratio of the polyalcohol (trihydroxylic alcohol) with 3 OH bases in polyalcohol is preferably 50 weights of weight %~100 %, the more preferably 70 weight % of weight %~100, the further preferably 80 weight % of weight %~100 are measured, further preferably The 90 weight % of weight %~100, the particularly preferably 95 weight % of weight %~100, are most preferably essentially 100 weight %.

For the polyalcohol, it is preferable that can include the polyalcohol that number-average molecular weight (Mn) is 400~20000. The content ratio for the polyalcohol that number-average molecular weight (Mn) in polyalcohol is 400~20000 is preferably 50 weights of weight %~100 Measure %, the more preferably 70 weight % of weight %~100, further preferably 90 weight %~100 weight %, particularly preferably 95 The weight % of weight %~100 are most preferably essentially 100 weight %.

In addition, in the present invention, several equal molecules are preferably used in combination in the polyalcohol (trihydroxylic alcohol) with 3 OH bases as polyalcohol Measure trihydroxylic alcohol, the trihydroxylic alcohol that number-average molecular weight (Mn) is 2000~6000 and the number-average molecular weight that (Mn) is 7000~20000 (Mn) trihydroxylic alcohol for being 400~1900, trihydroxylic alcohol that is more preferable and being 8000~15000 with number-average molecular weight (Mn), number are divided equally The trihydroxylic alcohol that the trihydroxylic alcohol and number-average molecular weight (Mn) that son amount (Mn) is 2000~5000 are 500~1800, further preferably simultaneously With number-average molecular weight (Mn) be 8000~12000 trihydroxylic alcohol, the trihydroxylic alcohol sum number that number-average molecular weight (Mn) is 2000~4000 The trihydroxylic alcohol that average molecular weight (Mn) is 500~1500.

For the polyalcohol, it can enumerate for example：Polyester polyol, polyether polyol, polycaprolactone polyol, Polycarbonate polyol, castor-oil plant oils polyalcohol etc..

For the polyester polyol, such as it can be obtained by the esterification of polyol component and sour component It arrives.

For the polyol component, it can enumerate for example：Ethylene glycol, diethylene glycol, 1,3 butylene glycol, 1,4- fourths Glycol, neopentyl glycol, 3- methyl-1s, 5- pentanediols, 2-butyl-2-ethyl-1,3-propanediol, 2,4- diethyl -1,5- penta 2 Alcohol, 1,2- hexylene glycols, 1,6-HD, 1,8- ethohexadiols, 1,9- nonanediols, 2- methyl-1s, 8- ethohexadiols, 1,8- decanediols, Octacosanol, glycerine, trimethylolpropane, pentaerythrite, hexanetriol, polypropylene glycol etc..

For the sour component, it can enumerate for example：Succinic acid, methylsuccinic acid, adipic acid, pimelic acid, nonyl two Acid, decanedioic acid, 1,12 dodecanedioic acid, 1,14- tetracosandioic acids, dimeric dibasic acid, 2- methyl-1s, 4- cyclohexane cyclohexanedimethanodibasics, 2- second Base -1,4 cyclohexanedicarboxylic acid, terephthalic acid (TPA), M-phthalic acid, phthalic acid, M-phthalic acid, terephthalic acid (TPA), 1, 4- naphthalenedicarboxylic acids, 4,4 '-biphenyl dicarboxylic acids, their acid anhydrides etc..

As the polyether polyol, can enumerate for example：Water, low molecular weight polyols are (propylene glycol, ethylene glycol, sweet Oil, trimethylolpropane, pentaerythrite etc.), bisphenols (bisphenol-A etc.), dihydroxy benzenes (catechol, resorcinol, to benzene two Phenol etc.) etc. be used as initiator, make the alkylene oxides addition such as ethylidene oxide, propylidene oxide, butyleneoxide Polyether polyol obtained from polymerization.Specifically, can enumerate for example：Polyethylene glycol, polypropylene glycol, polytetramethylene glycol Deng.

For the polycaprolactone polyol, it can enumerate such as by cyclic ester 6-caprolactone, σ-valerolactone Caprolactone obtained from the ring-opening polymerisation of monomer is birdsed of the same feather flock together esterdiol etc..

For the polycarbonate polyol, it can enumerate for example：Above-mentioned polyol component is set to contract with phosgene Polycarbonate polyol obtained from poly- reaction；Make above-mentioned polyol component and dimethyl carbonate, diethyl carbonate, carbonic acid dipropyl Ester, diisopropyl carbonate, dibutyl carbonate, carbonic acid ethyl butyl ester, ethylene carbonate, propylene carbonate, diphenyl carbonate, carbonic acid Polycarbonate polyol obtained from transesterification condensation occurs for the carbonic diesters class such as dibenzyl ester；It is used in combination two or more above-mentioned polynary Copolymerization polycarbonate polyalcohol obtained from alcohol component；Above-mentioned various polycarbonate polyols are made to occur with carboxylic compound Polycarbonate polyol obtained from esterification；Make the compound of above-mentioned various polycarbonate polyols and hydroxyl that ether occur Change polycarbonate polyol obtained from reaction；Make above-mentioned various polycarbonate polyols that ester exchange reaction occur with ester compounds Obtained from polycarbonate polyol；Make the compound of above-mentioned various polycarbonate polyols and hydroxyl that ester exchange reaction occur Obtained from polycarbonate polyol；Make above-mentioned various polycarbonate polyols that polycondensation reaction occur with dicarboxylic acid compound and obtain The polyesters polycarbonate polyol arrived；Make above-mentioned various polycarbonate polyols be copolymerized with alkylene oxide to obtain Copolyether class polycarbonate polyol etc..

For the castor-oil plant oils polyalcohol, can enumerate for example makes Castor Oil Fatty Acid and above-mentioned polyol component Castor-oil plant oils polyalcohol obtained from reaction.Specifically, can enumerate for example makes Castor Oil Fatty Acid be reacted with polypropylene glycol Obtained from castor-oil plant oils polyalcohol.

The polyisocyanate compound (polyfunctional isocyanate compound) can be only a kind of, or two kinds with On.

For the polyisocyanate compound (polyfunctional isocyanate compound), it may be used and can be used in gathering The arbitrarily suitable polyisocyanate compound of ammonia esterification.It, can be with for such polyisocyanate compound It enumerates for example：Multifunctional aliphatic kind isocyanate compound, multifunctional alicyclic kind isocyanate, multifunctional aromatic are different Cyanate esters etc..

For the multifunctional aliphatic kind isocyanate compound, it can enumerate for example：Two isocyanide of trimethylene Acid esters, tetramethylene diisocyanate, hexamethylene diisocyanate, pentamethylene diisocyanate, 1,2- propylidene two are different Cyanate, 1,3- tetramethylene diisocyanates, ten dimethylene diisocyanates, 2,4,4- tri-methyl hexamethylene diisocyanates Ester etc..

For the multifunctional alicyclic kind isocyanate compound, it can enumerate for example：1,3- cyclopentene two is different Cyanate, 1,3- cyclohexane diisocyanates, 1,4- cyclohexane diisocyanates, isophorone diisocyanate, hydrogenation hexichol Dicyclohexylmethane diisocyanate, hydrogenation benzene dimethylene diisocyanate, hydrogenated toluene diisocyanate, hydrogenation durol two are sub- Methyl diisocyanate etc..

For the multifunctional aromatic diisocyanate cpd, it can enumerate for example：Two isocyanide of phenylene Acid esters, 2,4 toluene diisocyanate, 2,6- toluene di-isocyanate(TDI)s, 2,2 '-methyl diphenylene diisocyanates, 4,4 '-two Methylenebis phenyl isocyanate, 4,4 '-toluidine diisocyanates, 4,4 '-diphenyl ether diisocyanates, 4,4 '-diphenyl Diisocyanate, 1,5- naphthalene diisocyanates, benzene dimethylene diisocyanate etc..

For the polyisocyanate compound, various polyfunctional isocyanateizations as described above can also be enumerated Close object trimethylolpropane adduct, reacted with water obtained from biuret type, the trimer with isocyanurate ring Deng.Alternatively, it is also possible to which they are used in combination.

Relative to 100 parts by weight of the polyalcohol, the content ratio of the polyisocyanate compound is preferably 5 parts by weight The parts by weight of~60 parts by weight, more preferably 10 parts by weight~50, the parts by weight of further preferably 15 parts by weight~40.

The equivalent proportion of NCO bases and OH bases in the polyalcohol and the polyisocyanate compound is in terms of NCO bases/OH bases Preferably greater than 1.0 and be less than or equal to 5.0, more preferably 1.1~5.0, further preferably 1.2~4.0, particularly preferably 1.5~3.5, most preferably 1.8~3.0.

The polyurethane based resin can include the aliphatic ester that can be used as wettability additives.By making polyurethanes Resin includes aliphatic ester, and wetting speed can improve.Aliphatic ester can be only a kind of, or two or more.

Relative to 100 parts by weight of the polyalcohol, the content ratio of the aliphatic ester is preferably the weight of 5 parts by weight~50 Part, the parts by weight of more preferably 10 parts by weight~45, the parts by weight of further preferably 15 parts by weight~40, particularly preferably 20 weight Part~35 parts by weight, the parts by weight of most preferably 25 parts by weight~30.By the way that the content ratio of aliphatic ester is adjusted to above-mentioned model In enclosing, wetting speed can further increase.When the content ratio of aliphatic ester is too small, wetting speed is possible to be unable to fully It improves.When the content ratio of aliphatic ester is excessive, it is possible to produce the problem unfavorable to cost is unable to maintain that adhesion characteristic Problem or the contaminated problem of adherend.

The number-average molecular weight (Mn) of the aliphatic ester is preferably 200~400, and more preferably 210~395, it is further excellent It is selected as 230~380, particularly preferably 240~360, most preferably 270~340.By by the number-average molecular weight of aliphatic ester (Mn) it is adjusted in above range, wetting speed can be improved further.When the number-average molecular weight (Mn) of aliphatic ester is too small, It is possible that not improved use level more wetting speeds.It is viscous when dry when the number-average molecular weight (Mn) of aliphatic ester is excessive The curability of mixture is deteriorated, it is possible to not only also generate harmful effect to wetting characteristics but also to other adhesion characteristics.

For the aliphatic ester, it can use within the scope of the effect of the invention arbitrarily suitable Aliphatic ester.For such aliphatic ester, it can enumerate for example：Polyethylene glycol oxide bisphenol-A laurate, stearic acid fourth Ester, palmitic acid 2- ethylhexyls, stearic acid 2- ethylhexyls, Glyceryl monobehenate, 2 ethyl hexanoic acid cetyl ester, Pork and beans Cool isopropyl propionate, isopropyl palmitate, isostearic acid cholesterol ester, lauryl methacrylate, fatty acid distribution of coconut oil methyl esters, bay Sour methyl esters, methyl oleate, methyl stearate, myristyl myristate, myristic acid octyldodecyl ester, pentaerythrite list oil It is acid esters, pentaerythritol monostearate, four palmitate of pentaerythrite, stearyl stearate, stearic acid isotridecyl ester, sweet Oily three (2 ethyl hexanoic acid) esters, butyl laurate, oleic acid monooctyl ester etc..

The polyurethane based resin can include levelling agent.By polyurethane based resin include levelling agent, can prevent by Appearance caused by orange peel is uneven.The levelling agent can be only a kind of, or two or more.

Polyurethane based resin is obtained as described cure containing the composition of polyalcohol and polyisocyanate compound is made Method for, may be used and used polyurethane-reinforcement reaction method of bulk polymerization, polymerisation in solution etc. etc., do not damaged this hair Arbitrarily suitable method in the range of bright effect.But it is previous by via so-called carbamate prepolymer Obtained from polyurethane based resin be possible to can not to show the effect of the present invention, therefore as making described to contain polyalcohol and polyisocyanate For the composition solidification of cyanate esters obtains the method for polyurethane based resin, preferably except through via amino first Acid esters prepolymer and obtain the method other than the method for polyurethane based resin.

＜ ultra-violet absorbers ＞

In the optics surface protection film of the present invention, preferably described adhesive composition contains ultra-violet absorber, excellent It is 3 or less to select the hydroxyl of the intramolecular of the ultra-violet absorber.By using ultra-violet absorber, can protect it is easy because Ultraviolet light and the component deteriorated are further 3 ultra-violet absorbers below by using hydroxyl, adhesive phase it is viscous Resultant force excellent in stability, therefore preferably.It should be noted that can speculate, in the hydroxyl of the intramolecular of the ultra-violet absorber In the case of Quito, ultra-violet absorber reacts with crosslinking agent, and hinders the solidification of adhesive composition.

The ultra-violet absorber is not particularly limited, and can enumerate such as triazine-based ultraviolet absorbent, benzotriazole Class ultra-violet absorber, benzophenone ultraviolet absorbent, hydroxy benzophenone ketone ultra-violet absorber, salicylic acid esters are purple Ultraviolet absorbers, cyanoacrylate ultraviolet absorbent etc., they can be used alone or be applied in combination two kinds More than.Wherein, it is preferred mode that the hydroxyl of the intramolecular of the ultra-violet absorber, which is 3 modes below,.

For the triazine-based ultraviolet absorbent with 3 or less hydroxyls in 1 molecule, specifically, can use： Bis- [{ 4- (4- ethylhexyls oxygroup) -4- hydroxyls } phenyl] -6- (4- the methoxyphenyls) -1,3,5- triazines (Tinosorb of 2,4- S, BASF (BASF) manufacture)；2,4- bis- [2- hydroxyl -4- butoxy phenyls] -6- (2,4- dibutoxies phenyl) -1,3,5- three Piperazine (TINUVIN 460, BASF are manufactured)；2- (bis- (2,4- the 3,5-dimethylphenyls) -1,3,5- triazine -2- bases of 4,6-) -5- hydroxy benzenes Base and [(C₁₀-C₁₆(predominantly C₁₂-C₁₃) alkyl oxy) methyl] ethylene oxide reaction product (TINUVIN400, BASF system It makes)；2- [bis- (2,4- the 3,5-dimethylphenyls) -1,3,5- triazine -2- bases of 4,6-] -5- [3- (dodecyl oxygroup) third oxygen of -2- hydroxyls Base] phenol), bis- (2,4- the 3,5-dimethylphenyls) -1,3,5- triazines of 2- (2,4- dihydroxy phenyls) -4,6- and glycidic acid 2- second The reaction product of the own ester of base (TINUVIN405, BASF are manufactured)；2- (4,6- diphenyl -1,3,5- triazine -2- bases) -5- [(oneself Base) oxygroup] phenol (TINUVIN1577, BASF are manufactured)；2- (4,6- diphenyl -1,3,5- triazine -2- bases) -5- [2- (2- second Base hexylyloxy) ethyoxyl] phenol (ADK STAB LA46, Ai Dike (ADEKA) are manufactured)；2- (2- hydroxyls -4- [1- octyl oxygen Base carbonyl ethyoxyl] phenyl) bis- (4- the phenyls) -1,3,5-triazines of -4,6- (TINUVIN479, BASF AG's manufacture) etc..

For the Benzotriazole Ultraviolet Stabilizer, 2- (2H- benzotriazole -2- bases) -6- (1- can be used Methyl-1-phenylethyl)-4- (1,1,3,3- tetramethyl butyl) phenol (TINUVIN 928, BASF manufacture), 2- (2- hydroxyls- 5- tert-butyl-phenyls) -2H- benzotriazole (TINUVIN PS, BASF manufacture), benzenpropanoic acid and 3- (2H- benzotriazole -2- bases) - 5- (1,1- dimethyl ethyls) -4- hydroxyls (C_7-9Side chain and straight chained alkyl) ester compounds (TINUVIN384-2, BASF system It makes)；Bis- (1- methyl-1s-phenylethyl) phenol of 2- (2H- benzotriazole -2- bases) -4,6- (TINUVIN900, BASF are manufactured)； 2- (2H- benzotriazole -2- bases) -6- (1- methyl-1s-phenylethyl) -4- (1,1,3,3- tetramethyl butyls) phenol (TINUVIN928, BASF are manufactured)；Methyl -3- (3- (2H- benzotriazole -2- bases) -5- tert-butyl-hydroxy phenyls) propionic acid The reaction product of ester/Liquid Macrogol (TINUVIN1130, BASF are manufactured)；2- (2H- benzotriazole -2- bases) paracresol (TINUVIN P, BASF manufacture)；Bis- (1- methyl-1s-phenylethyl) phenol of 2- (2H- benzotriazole -2- bases) -4,6- (TINUVIN234, BASF are manufactured)；2- [5- chlorine (2H)-benzotriazole -2- bases] -4- methyl-6-tert-butylphenols (TINUVIN326, BASF are manufactured), (TINUVIN326FL, BASF are manufactured)；Two uncles penta of 2- (2H- benzotriazole -2- bases) -4,6- Base phenol (TINUVIN328, BASF are manufactured)；2- (2H- benzotriazole -2- bases) -4- (1,1,3,3- tetramethyl butyls) phenol (TINUVIN329, BASF are manufactured)；Methyl 3- (3- (2H- benzotriazole -2- bases) -5- tert-butyl-hydroxy phenyls) propionic ester With the reaction product of Liquid Macrogol (TINUVIN213, BASF are manufactured)；2- (2H- benzotriazole -2- bases) -6- dodecyls - 4- cresols (TINUVIN571, BASF are manufactured)；2- [2- hydroxyls -3- (3,4,5,6- tetrahydric phthalimides ylmethyl) -5- Aminomethyl phenyl] benzotriazole (Sumisorb250, Sumitomo Chemical manufacture) etc..

As the benzophenone ultraviolet absorbent (benzophenone compound), hydroxy benzophenone ketone ultraviolet light For absorbent (hydroxy benzophenone ketone compound), it can enumerate for example：2,4 dihydroxyl benzophenone, 2- hydroxyl -4- first Oxygroup benzophenone, 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid (anhydrous salt and three hydrated salts), 2- hydroxyl -4- octyl oxygen Base benzophenone, 4- dodecyl oxygroup -2- dihydroxy benaophenonels, 4- benzyl oxygroup -2- dihydroxy benaophenonels, 2,2 ', 4,4 ' - Tetrahydroxybenzophenone, 2,2 '-dihydroxy -4,4- dimethoxy-benzophenones, 2,2 '-dihydroxy -4- methoxy benzophenones (KEMISORB 111, Chemipro chemical conversion manufacture) etc..

For the salicylate ultraviolet absorbent (salicylic acid ester type compound), it can enumerate for example：2- Acryloxy phenol benzoate, 2- acryloxy -3- methyl benzoic acids phenyl ester, 2- acryloxy -4- methyl benzoic acids Phenyl ester, 2- acryloxy -5- methyl benzoic acids phenyl ester, 2- acryloxy -3- methoxy benzoic acids phenyl ester, 2- hydroxy benzenes first Acid phenenyl ester, 2- hydroxy-3-methyls phenol benzoate, 2- hydroxy-4-methyls phenol benzoate, 2- hydroxy-5-methyl yl benzoic acid benzene Ester, 2- hydroxy 3-methoxybenzenes phenyl formate, 3,5- di-tert-butyl-4-hydroxybenzoic acid 2,4- 6- di-tert-butyl phenyl esters (TINUVIN120, BASF are manufactured) etc..

For the cyanoacrylate ultraviolet absorbent (cyanoacrylate compound), it can enumerate Such as：2- alkyl cyanoacrylates, 2- alpha-cyanoacrylates cycloalkyl ester, 2- alpha-cyanoacrylates alkoxy alkyl, 2- cyano Acrylic acid alkenyl esters, 2- alpha-cyanoacrylate alkynyl esters etc..

The ultra-violet absorber can be used alone, can also be used in mixed way it is two or more, it is poly- relative to the basis Close 100 parts by weight of object, the content of the ultra-violet absorber entirety is preferably the parts by weight of 0.1 parts by weight~20, and more preferably 0.5 The parts by weight of parts by weight~15, the parts by weight of further preferably 1 parts by weight~10.By the way that the content of ultra-violet absorber is set as The range can fully play the ultraviolet radiation absorption function of adhesive phase and not interfere polymerizable ultraviolet, therefore be excellent Choosing.

＜ antioxidants ＞

In the optics surface protection film of the present invention, described adhesive composition can contain antioxidant, Ke Yilie Citing such as radical chain terminator (ラ ジ カ ル Even Lock forbid drug), peroxide decomposer.

For the radical chain terminator, it can enumerate such as phenol antioxidant, amine antioxidants.

For the peroxide decomposer, it can enumerate such as sulphur-containing antioxidant, phosphorous antioxidant.

For the phenol antioxidant, for example single phenol antioxidant, Bis-phenolic antioxidants, height can be enumerated Molecule-type phenol antioxidant etc..

For single phenol antioxidant, it can enumerate for example：DBPC 2,6 ditertiary butyl p cresol, Butylated hydroxy Anisole, 2,6- di-t-butyl -4- ethyl -phenols, β-(3,5- di-tert-butyl-hydroxy phenyls) propionic acid octadecanol ester etc..

For the Bis-phenolic antioxidants, it can enumerate for example：2,2 '-di-2-ethylhexylphosphine oxides (4- methyl-6-tert butyl Phenol), 2,2 '-methylene-bis(4-ethyl-6-t-butyl phenol)s, 4,4 '-thiobis (3 methy 6 tert butyl phenol), 4, Bis- [1,1- dimethyl -2- [β-(3- tertiary butyl-4-hydroxy -5- the first of 4 '-butylidene-bis(3-methyl-6-t-butyl phenol)s, 3,9- Base phenyl) propionyloxy] ethyl] 2,4,8,10- tetra- oxaspiro [5,5] hendecane etc..

For the polymer electrolyte phenol antioxidant, it can enumerate for example：(2- methyl -4- the hydroxyls-of 1,1,3- tri- 5- tert-butyl-phenyls) butane, 1,3,5- trimethyls -2,4,6- three (3,5- di-tert-butyl-4-hydroxyl benzyls) benzene, four [methylene - 3- (3 ', 5 '-di-t-butyls -4 '-hydroxy phenyl) propionic ester] methane, bis- [3,3 '-bis- (4 '-hydroxyls -3 '-tert-butyl-phenyl) fourths Acid] glycol ester, 1,3,5- tri- (3 ', 5 '-di-t-butyls -4 '-hydroxybenzyl) guanamine, 4,6- (1H, 3H, 5H) triketone, Tocopherol, pentaerythrite four [3- (3 ', 5 '-di-t-butyls -4 '-hydroxy phenyl) propionic ester] etc..

For the sulphur-containing antioxidant, it can enumerate for example：3,3 '-dilauryl thiodipropionates, 3,3 '-sulphur For two myristin of dipropionic acid, 3,3 '-distearylthiodi-propionates etc..

For the phosphorous antioxidant, it can enumerate for example：Triphenyl phosphite, diphenyl phosphite isodecyl Ester, phenyl-phosphite diisodecyl ester etc..

The antioxidant can be used alone, can also be used in mixed way it is two or more, relative to the base polymer 100 parts by weight, the content of the antioxidant entirety are preferably the parts by weight of 0.01 parts by weight~1, and more preferably 0.1 parts by weight~ The parts by weight of 0.8 parts by weight, further preferably 0.2 parts by weight~0.7.By the way that the content of the antioxidant is set as described Range can be adequately suppressed being deteriorated caused by aoxidizing for adhesive phase, and adhesion characteristic is stablized, therefore preferably.

Compound ＞s of the ＜ containing oxyalkylene

The adhesive composition used in the present invention can also contain the compound containing oxyalkylene.By containing oxygen-containing Asia The compound of alkyl can further show light fissility.For the compound containing oxyalkylene, it can enumerate with oxygen The organopolysiloxane of alkylidene chain, the compound containing oxyalkylene for not including organopolysiloxane.

＜ crosslinking agents ＞

In the surface protection film of the present invention, preferably described adhesive composition contains crosslinking agent.In addition, in the present invention, Adhesive phase can be made using described adhesive composition.For example, being to contain (methyl) in described adhesive composition In the case of the acrylic adhesives of acrylic polymer, by suitably adjusting described (methyl) acrylic polymer Component units, component ratio, the selection of crosslinking agent and addition ratio etc. and be crosslinked, it is better heat resistance can be obtained Adhesive phase (surface protection film).In addition, in the case of the polyurethane binding containing the polyurethane polymer, By Component units, component ratio, the selection of crosslinking agent and additive ratio for suitably adjusting polyalcohol etc. and handed over Connection, can initially being done over again property (リ ワ ー Network) it is excellent and through when after the excellent adhesive phase (surface of adhesion reliability Protective film).

For the crosslinking agent being used in the present invention, isocyanate compound, epoxide, trimerization can be used Cyanamide resinoid, aziridine derivative and metal chelate compound etc. particularly use isocyanate compound, epoxidation It is preferred mode to close object.In addition, these compounds can be used alone, can also be used in mixed way two or more.

For the isocyanate compound, it can enumerate for example：Trimethylene diisocyanate, butylidene two are different The aliphatic polyisocyantes classes such as cyanate, hexamethylene diisocyanate (HDI), dimer acid diisocyanate；Cyclopentylene Diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate (IPDI), 1,3- bis- (isocyanatomethyl) The alicyclic isocyanates class such as hexamethylene；2,4 toluene diisocyanate, 4,4 '-methyl diphenylene diisocyanates, benzene two are sub- The aromatic isocyanates classes such as methyl diisocyanate (XDI)；Using allophanic acid ester bond, biuret linkage, isocyanurate-bond, Two ketonic bond of urea (ウ レ ト ジ オ Application Knot close), urea bond, carbodiimide key, uretonimine key (ウ レ ト Application イ ミ Application Knot is closed),Diazine Three ketonic bonds etc. are by the modified modified polyisocyanate body of above-mentioned isocyanate compound.It can enumerate for example as commercially available product Trade name Takenate 300S, 500 Takenate, Takenate 600, Takenate D165N, Takenate D178N (being made above for Mitsui Chemicals, Inc.'s system), Sumidule T80, Sumidule L, Desmodur N3400 (above, live to change Bayer Polyurethane (Sumika Bayer Urethane) company manufacture), Millionate MR, Millionate MT, Coronate L, Coronate HL, Coronate HX (being manufactured above for Tosoh company) etc..These isocyanate compounds can individually make With, can also be used in mixed way it is two or more, can also and with the isocyanic acid more than isocyanate compound of 2 functions and 3 functions Ester compounds.By and with crosslinking agent, adhesiveness and resistance to resilience (to the adhesiveness of curved surface) can be taken into account, can be bonded The superior adhesive phase of reliability (surface protection film).

For the epoxide, it can enumerate for example：N, N, N ', N '-four glycidyl group m-xylene diamines (trade name TETRAD-X, the manufacture of gas chemical company of Mitsubishi), bis- (N, the N- diglycidyl amino methyl) hexamethylenes of 1,3- (trade name TETRAD-C, the manufacture of gas chemical company of Mitsubishi) etc..

For the melamine resinoid, hexamethylolmelamine etc. can be enumerated.Derive as aziridine For object, it can enumerate such as trade name HDU, TAZM, TAZO of commercially available product (being manufactured above for mutual Yao Gong companies).

For the metal chelate compound, as metal component, aluminium, iron, tin, titanium, nickel etc. can be enumerated；As Chelating components can enumerate acetylene, methyl acetoacetate, ethyl lactate etc..

For the content of the crosslinking agent used in the present invention, such as relative to (methyl) acrylic polymer The parts by weight of 100 parts by weight, preferably 0.01 parts by weight~20, the parts by weight of more preferably 0.1 parts by weight~15, further preferably The parts by weight of 0.5 parts by weight~10, the parts by weight of most preferably 1 parts by weight~8.The case where the content is less than 0.01 parts by weight Under, it is become inadequate using being cross-linked to form for crosslinking agent progress, there is following tendency：The cohesiveness of obtained adhesive phase becomes It is small, the reason of being unable to get sufficient heat resistance sometimes, and become generation of adhesive deposit.On the other hand, it is more than 20 weight in content In the case of part, the cohesiveness of polymer is big, and mobility reduces, and has following tendency：To the profit of adherend (for example, polarization plates) It is wet insufficient, the reason of becoming the protuberance generated between adherend and adhesive phase (adhesive composition layer).In addition, these Crosslinking agent can be used alone, and can also be used in mixed way two or more.In addition, in the poly- ammonia containing the polyurethane polymer In the case of ester adhesive, relative to 100 parts by weight of the polyalcohol, the content of the crosslinking agent be preferably 5 parts by weight~ The parts by weight of 30 parts by weight, more preferably 5 parts by weight~28, the parts by weight of further preferably 5 parts by weight~25, particularly preferably 5 The parts by weight of parts by weight~23.By the way that the content of the crosslinking agent to be adjusted in above range, obtained adhesive phase is viscous Not only initial adhesion is excellent when being affixed on adherend, and through when after adhesion reliability it is also excellent.

＜ crosslinking catalysts ＞

It can also contain in described adhesive composition and to be useful for above-mentioned arbitrary cross-linking reaction is made to be more effectively carried out Crosslinking catalyst.For the crosslinking catalyst, it can use for example：Dibutyl tin laurate, tin dilaurate two are pungent The tin catalysts such as Ji Xi (dioctyl tin cinnamic acid tin)；Three (acetyl acetone) iron, three (conjunction of hexane -2,4- diketone) iron, three It is (conjunction of heptane -2,4- diketone) iron, three (conjunction of heptane -3,5- diketone) iron, three (conjunction of 5- methyl hexane -2,4- diketone) iron, three (pungent Alkane -2,4- diketone close) iron, three (conjunction of 6- methyl heptane -2,4- diketone) iron, three (conjunction of 2,6- dimethyl heptane -3,5- diketone) iron, Three (conjunction of nonane -2,4- diketone) iron, three (conjunction of nonane -4,6- diketone) iron, three (conjunctions of 2,2,6,6- tetramethyl base heptane -3,5- diketone) Iron, three (conjunction of tridecane -6,8- diketone) iron, three (conjunction of 1- phenyl butane -1,3- diketone) iron, three (hexafluoroacetylacetone conjunction) iron, Three (ethyl acetoacetate) iron, three (acetoacetate n-propyl) iron, three (isopropyl acetoacetate) iron, three (the positive fourths of acetoacetate Ester) iron, three (the secondary butyl ester of acetoacetate) iron, three (tert-butyl acetoacetate) iron, three (propionyl methyl acetate) iron, three (propionyl second Acetoacetic ester) iron, three (propionyl n-propyl acetate) iron, three (propionyl isopropyl acetate) iron, three (propiono n-butyl acetate) iron, three (propiono sec-butyl acetate) iron, three (propiono tert-butyl acetate) iron, three (benzyl acetoacetate) iron, three (malonic acid dimethyls Ester) the iron class catalysis such as iron, three (diethyl malonate) iron, trimethoxy iron, triethoxy iron, three isopropoxy iron, iron chloride Agent.These crosslinking catalysts can be one kind, can also and with two or more.

The content of the crosslinking catalyst is not particularly limited, such as relative to (methyl) acrylic polymer 100 parts by weight, are preferably set to the parts by weight of about 0.0001 parts by weight~about 1, the parts by weight of more preferably 0.001 parts by weight~0.5. When in the range, when forming adhesive phase, the speed of cross-linking reaction is fast, and the working life of adhesive composition is also elongated, For preferred mode.Can also be two or more furthermore it is possible to be only a kind of.In addition, containing the polyurethane polymer Polyurethane binding in the case of, for the content as the crosslinking catalyst, relative to 100 weight of the polyalcohol Part, preferably comprise the parts by weight of 0.01 parts by weight~1, the parts by weight of more preferably 0.08 parts by weight~0.5.

The other additive ＞ of ＜

In addition, within the scope of the effect of the invention, other public affairs can be contained in described adhesive composition The additive known, for example, can suitably be added according to institute's purposes to be used the powders such as lubricant, colorant, pigment, solvent, Plasticizer, softening agent, tackifier, low-molecular weight polymer, surface lubricant, levelling agent, wettability additives, antioxidant, It is corrosion inhibiter, light stabilizer, heat-resisting stabilizing agent, ultra-violet absorber, polymerization inhibitor, silane coupling agent, antistatic agent, inorganic or organic Filler, metal powder, graininess, foil-like object etc..

＜ optics surface protection film ＞

The optics of the present invention has the base material comprising polyester resin and setting with surface protection film (surface protection film) In the adhesive phase of the single side of the base material formed by adhesive composition, at this point, the crosslinking of adhesive composition usually exists It is carried out after the coating of adhesive composition, but the adhesive phase comprising the adhesive composition after crosslinking can also be transferred to base On material etc..

In addition, the method for forming adhesive phase on base material is not particularly limited, such as can make in the following manner, Described adhesive composition (solution) is coated on base material, polymer solvent etc. is dried and removed, to form bonding on base material Oxidant layer.Later, can also for adjust adhesive phase ingredient transfer or adjust cross-linking reaction the purpose of and conserved.Separately Outside, adhesive composition is coated on base material and when making surface protection film, can be new in described adhesive composition More than one solvents in addition to polymer solvent are added, enable to be uniformly coated on base material.

In addition, for the forming method of adhesive phase when surface protection film as the manufacture present invention, using bonding The well known method used in manufacture with class.Specifically, such as rolling method, gravure coating process, reversed coating can be enumerated Method, roller brush method, spray coating method, air knife coating method, the extrusion coating methods etc. using die coater etc..

The thickness of described adhesive layer is preferably 1 μm~30 μm, more preferably 2 μm~28 μm, further preferably 3 μm~ 25μm.When the thickness of adhesive phase is in the range, it is easy to get the balance of appropriate releasable and adhesiveness, therefore excellent Choosing.

For the surface protection film of the present invention, preferably overall thickness is 7 μm~130 μm, more preferably 10 μm~100 μ M, further preferably 20 μm~50 μm.When in the range, adhesion characteristic (releasable, adhesiveness, adhesion stability Deng), workability, excellent appearance, be preferred embodiment.It should be noted that the overall thickness refer to include base material, All layers of the thickness such as adhesive phase, partition and other layers add up to.

＜ partitions ＞

, can be as needed for the surface protection film of the present invention, for the purpose for protecting adhesive layer surface It is bonded partition.

For the material for constituting the partition, there are paper, plastic foil, it is excellent from the viewpoint of surface smoothness is excellent Choosing uses plastic foil.For the film, it is not particularly limited as long as the film that can protect described adhesive layer, Ke Yilie Citing is such as：Polyethylene film, polypropylene screen, polybutene film, polybutadiene film, polymethylpentene film, polychloroethylene film, vinyl chloride are total Polymers film, polyethylene terephthalate film, polybutylene terephthalate (PBT) film, polyurethane film, ethane-acetic acid ethyenyl ester Co-polymer membrane etc..

The thickness of the partition is typically about 5 μm~about 200 μm, preferably from about 8 μm~about 100 μm, even more preferably about 10 μ M~about 50 μm.The partition can also be carried out as needed utilizing polysiloxane-based, fluorine-containing type, chain alkyl class or fat The demoulding of the progress such as releasing agent, silicon dioxide powder of sour amides and antifouling process or application type, kneading type, vapor deposition type etc. are anti- Electrostatic treatment.

Surface protection film disclosed herein can be in a manner of including also other layers other than supporter and adhesive phase Implement.For other layers, the priming coat (anchor layer) for the anchoring for improving antistatic backing, adhesive phase can be enumerated Deng.

The application method ＞ of ＜ optics surface protection films

For the application method of optics surface protection film as the present invention, such as：In the optics that will constitute the present invention The surface of a part for the Printing Department of printed glass is fitted in the adhesive layer surface of surface protection film and is carried out ultraviolet light and is consolidated In the process of change, in no part coated UV line solidified resin for being bonded optics surface protection film and exposure, prevent from pasting There is being deteriorated caused by ultraviolet light for the part without coated UV line solidified resin of optics surface protection film.Pass through The application method can protect Printing Department to grade component, for the component, it is desirable to be able to prevent it from being irradiated because of ultraviolet light And it carries out curing reaction, deteriorated caused by ultraviolet light irradiates.

＜ optical components ＞

In the present invention, can by the surface mount of the adhesive phase of the optics surface protection film in optical component to Protect optical component.Even if the surface protection film is on pasting optical component for being stored in the adherend as adhesive phase etc. Then in the case of being heated, can also it prevent bonding force from increasing, adhesion stability is excellent, and releasable is excellent, Surface protection purposes (surface protection film) when can be consequently used for processing, transporting, deliver etc., therefore to being used to protect the light It is useful to learn the surface of component (polarization plates etc.).In addition, inhibit the tone variations of the adhesive phase of composition surface protection film, and The ultraviolet transmittance of surface protection film entirety is inhibited relatively low, therefore surface protection film can fitted in optical component In the state of checked, additionally it is possible to for wanting to inhibit solidification with ultraviolet light irradiation, the purposes of deterioration, therefore is preferred Mode.

[embodiment]

Hereinafter, being illustrated to several embodiments related to the present invention, but it is not intended to and limits the invention to the tool Range shown in body example.It should be noted that " part " and " % " in the following description is then weight unless otherwise specified Benchmark.In addition it is shown that the use level (additive amount) in table.

In addition, each characteristic in the following description is determined or evaluates each by following manner.

The measurement ＞ of the glass transition temperature (Tg) of ＜ acrylic polymers

For glass transition temperature (Tg) (DEG C), using following literature values as the homopolymer formed by each monomer Glass transition temperature Tg n (DEG C), and found out according to following formula.

Formula：1/ (Tg+273)=Σ [Wn/ (Tgn+273)]

(in formula, Tg (DEG C) indicates that the glass transition temperature of copolymer, Wn (-) indicate the weight fraction of each monomer, Tgn (DEG C) indicates that the glass transition temperature of the homopolymer formed by each monomer, n indicate the type of each monomer.)

Literature value：

2-EHA (2EHA)：-70℃

2-Hydroxy ethyl acrylate (HEA)：-15℃

It should be noted that as literature value, with reference to " compounding design of acrylic resin is developed with new application (the new Yong Tu development of ア Network リ Le Trees fat He Cheng Let Meter と) " (central Management and exploitation center publishing department distribution).

The measurement ＞ of the weight average molecular weight (Mw) of ＜ acrylic polymers

For the weight average molecular weight (Mw) of used (methyl) acrylic polymer, TOSOH Co., Ltd is used The GPC devices (HLC-8220GPC) of manufacture are determined.Determination condition is as follows.

Sample concentration：0.2 weight % (tetrahydrofuran (THF) solution)

Sample size：10μl

Eluent：Tetrahydrofuran

Flow velocity：0.6ml/ minutes

Measuring temperature：40℃

Column：

Sample column：TSKguardcolumn SuperHZ-H (1)+TSKgel SuperHZM-H (2)

Reference column：TSKgel SuperH-RC (1)

Detector：Differential refractometer (RI)

It should be noted that weight average molecular weight is found out with polystyrene scaled value.In addition, being not limited to acrylic Object has also been carried out similarly measurement when measuring number-average molecular weight (Mn) with weight average molecular weight (Mw).

The measurement ＞ of ＜ b* values

The optics of each example is cured 7 days at room temperature with surface protection film (surface protection film), is then cut into width The size of 50mm, length 50mm remove partition from the adhesive layer surface of surface protection film, then utilize high speed integrating sphere type Transmissivity analyzer (company of color technical research institute manufactures in village, model " DOT-3C ") determines " b* values ".It needs to illustrate It is that b* values refer to CIELab values.

The b* values of the surface protection film are for 2 hereinafter, preferably 1.6 hereinafter, more preferably 1.2 or less.If the b* Value can then inhibit the variation of the tone of adhesive phase, additionally it is possible in the state of being pasted on optical component in the range It is checked, to actually use the upper level that there is no problem, therefore preferably.

The measurement ＞ of ＜ transmissivities

For transmissivity, the spectrophotometer U-4100 manufactured using Hitachi, Ltd makes 300nm~400nm wavelength Light from the substrate side vertical incidence substrate surface of the optics surface protection film obtained by embodiment and comparative example, find out transmission Rate (%).It should be noted that transmissivity (ultraviolet transmittance) is indicated in the transmissivity of the light of the wavelength in the range Transmissivity (%) when wavelength 365nm.

The transmissivity is for 2% hereinafter, preferably 1.8% hereinafter, more preferably 1.6% or less.The transmissivity is more than When 2%, transmission of ultraviolet rays is high, can not prevent solidification, deterioration caused by ultraviolet light irradiates, the strong of such as Printing Department occurs The problems such as degree reduces, therefore not preferably.

＜ Initial adhesions (bonding force before heating) ＞

The surface protection film of each example is cut into width 25mm, using 2kg roller by remove partition after optics surface The adhesive phase side of protective film fits in glass plate, and (Song Langxiaozi Industrial Co., Ltd manufactures, trade name：Micro Slide Glass S) surface, then place 20 minutes under room temperature (23 DEG C, 50%RH), then utilize tensile and compression testing machine (device name " TG-1kN ", the manufacture of Minebea companies) it is removed under conditions of 180 ° of peel angle, peeling rate 0.3m/ minute, survey The peeling force (to bonding glass power) of surface protection film has been determined as " Initial adhesion (bonding force before heating) " (N/25mm).

Determination condition：Temperature：23 ± 2 DEG C, humidity：50 ± 5%RH

Bonding force ＞ after ＜ heating

Test film is made in a manner of in the same manner as above-mentioned Initial adhesion, is then heated 30 minutes at 100 DEG C, is then existed It places 1 hour under room temperature (23 DEG C, 50%RH), is then determined " after heating under the conditions of same as above-mentioned Initial adhesion Bonding force " (N/25mm).

As described for bonding glass power, the bonding force after initial (before heating) and heating is both preferably 0.2N/ 25mm hereinafter, more preferably 0.15N/25mm hereinafter, further preferably 0.1N/25mm or less.The bonding force is more than 0.2N/ When 25mm, bonding force becomes excessively high, to be difficult to realize light fissility (releasable), such as uses as surface protection film In the case of, it is possible to generation of adhesive deposit is generated on adherend when being removed behind or breakage occurs for base material, therefore not It is preferred that.

The change rate ＞ of the front and back bonding force of ＜ heating

The change rate of the front and back bonding force of heating is calculated by following formula.

(change rate (%) of the front and back bonding force of heating)=100 × (bonding force before bonding force-heating after heating)/ (bonding force before heating)

The change rate of bonding force before and after the heating be ± 30% hereinafter, preferably ± 25% hereinafter, more preferably ± 20% or less.When the change rate is more than ± 30%, the reason of becoming re-release, stripping problem, therefore not preferably.

[embodiment 1]

[preparation of acrylic polymer]

With stirring blade, thermometer, nitrogen ingress pipe, condenser four-hole boiling flask in put into acrylic acid 2- ethyl hexyls 200 parts by weight of ester (2EHA), 8 parts by weight of 2-Hydroxy ethyl acrylate (HEA), as polymerization initiator 2,2 '-azos two it is different 0.4 parts by weight of butyronitrile, 312 parts by weight of ethyl acetate as solvent, import nitrogen while being slowly stirred, will be in flask Liquid temperature remains about 65 DEG C, and carries out 6 hours polymerisations, to be prepared for acrylic polymer solution (40 weight %). The weight average molecular weight (Mw) of above-mentioned acrylic polymer is 540,000, and glass transition temperature (Tg) is -68 DEG C.

[preparation of acrylic adhesives solution]

Above-mentioned acrylic polymer solution (40 weight %) is diluted to 29 weight % using ethyl acetate, relative to this The isocyanuric acid ester-formin of the hexamethylene diisocyanate as crosslinking agent is added in 100 parts by weight of solid constituent in solution (Japanese polyurethane industrial group manufactures, trade name：Coronate HX, " C/HX " in table 1) 4 parts by weight, as cross-linking catalyst (Tokyo fine chemistry industry (Tokyo Fine Chemical) company manufactures the dibutyl tin laurate of agent, trade name： EMBILIZER OL-1, " OL-1 " in table 1,0.5 weight % ethyl acetate solutions) 0.015 parts by weight, as ultraviolet radiation absorption Bis- [{ 4- (4- ethylhexyls oxygroup) -4- hydroxyls } phenyl] -6- (4- methoxyphenyls) -1,3,5- triazine (commodity of 2,4- of agent Name：Tinosorb S, BASF manufacture) 2 parts by weight, relative to total solvent amount be 3 parts by weight the acetyl as crosslinking delay agent Acetone is mixed, to obtain acrylic adhesives solution (adhesive composition).

[making of optics surface protection film]

By above-mentioned acrylic adhesives solution coating in the poly- terephthaldehyde with antistatic process layer as base material Sour glycol ester film (trade name：Diafoil T100G38, Resins Corporation of Mitsubishi manufacture, 38 μm of thickness) and antistatic process On the opposite face in face, heated 1 minute at 130 DEG C, so as to form 21 μm of adhesive phase of thickness.Then, by partition (to list Face implement polysiloxanes processing 21 μm of thickness polyethylene terephthalate film) polysiloxanes process face fit in The surface of above-mentioned adhesive phase, to make optics surface protection film.

＜ embodiments 2~5,1~3 ＞ of comparative example

Based on co content is matched shown in table 1, optics surface protection film has been made by method similarly to Example 1.

＜ embodiments 6 and 7 ＞

Use 12 μm of polyester film (manufacture of Resins Corporation of Mitsubishi, trade name of thickness：Diafoil T100G12) it replaces implementing The base material used in example 1 has made optics surface based on co content is matched shown in table 1 by method similarly to Example 1 Protective film.

＜ embodiments 8 and 9 ＞

Use 80 μm of polyester film (manufacture of spinning company of Japan, trade name of thickness：SRF base used in embodiment 1) is replaced Material has made optics surface protection film based on co content is matched shown in table 1 by method similarly to Example 1.

10 ＞ of ＜ embodiments

[preparation of polyurethane binding solution]

Used as polyalcohol PREMINOL S3011 (Asahi Glass Co., Ltd manufacture, Mn=10000) 85 parts by weight, SANNIX GP3000 (Sanyo's chemical conversion industry manufacture, Mn=3000) 13 parts by weight, SANNIX GP1000 (Sanyo's chemical conversion industry systems Make, Mn=1000) 2 parts by weight, coordinate Tinuvin 384-2 (BASF manufactures) 10 parts by weight as ultra-violet absorber, make For multifunctional alicyclic kind isocyanate compound (Tosoh manufacture, the trade name of crosslinking agent：Coronate HX) 18 parts by weight, Crosslinking catalyst (manufacture of chemistry Industry Co., Ltd of Japan, trade name：Nacem Fe (III)) 0.08 parts by weight, as antioxygen Irganox1010 (BASF manufactures) 0.5 parts by weight of agent, as wettability additives, nutmeg as aliphatic ester Isopropyl propionate (flower king's manufacture, trade name：Exceparl IPM) 30 parts by weight, 210 weight of ethyl acetate as retarder thinner Part, it is stirred with disperser, to obtain polyurethane binding solution (adhesive composition).

[making of optics surface protection film]

Above-mentioned polyurethane binding composition is coated on as the poly- to benzene two with antistatic process layer of base material Formic acid glycol ester film (trade name：Diafoil T100G38, Resins Corporation of Mitsubishi manufacture, 38 μm of thickness) at antistatic The opposite face in reason face is heated 1 minute at 130 DEG C, so as to form 20 μm of adhesive phase of thickness.Then, by partition (to list Face implement polysiloxanes processing 25 μm of thickness polyethylene terephthalate film) polysiloxanes process face fit in The surface of above-mentioned adhesive phase, to make optics surface protection film.

About the optics surface protection film with partition of embodiment and comparative example, by above-mentioned with co content, progress Various measurement and evaluation results are shown in table 1 and table 2.It should be noted that the use level in table 1 indicates active ingredient.

The detailed content of abbreviation in above-mentioned table 1 is as follows.

＜ base materials ＞

Diafoil T100G38：38 μm of thickness, the manufacture of Resins Corporation of Mitsubishi, trade name：Diafoil T100G38

Diafoil T100G12：12 μm of thickness, the manufacture of Resins Corporation of Mitsubishi, trade name：Diafoil T100G12

SRF：Company's manufacture, trade name are spun by 80 μm of thickness, Japan：SRF

＜ ultra-violet absorbers ＞

Tinosorb S：Bis- [{ 4- (4- ethylhexyls oxygroup) -4- hydroxyls } the phenyl] -6- (4- methoxyphenyls)-of 2,4- 1,3,5-triazines, trade name：Tinosorb S, BASF manufactures, hydroxyl value：2)

Tinuvin 571：2- (2H- benzotriazole -2- bases) -6- dodecyl -4- cresols, BASF manufactures, trade name： Tinuvin 571, hydroxyl value：1)

Tinuvin 384-2：Benzenpropanoic acid and 3- (2H- benzotriazole -2- bases) -5- (1,1- dimethyl ethyls) -4- hydroxyls (C_7-9Side chain and straight chained alkyl) ester compounds, BASF manufacture, trade name：Tinuvin 384-2, hydroxyl value：1)

Tinuvin 326：2- [5- chlorine (2H)-benzotriazole -2- bases] -4- methyl-6-tert-butylphenols, BASF manufactures, Trade name：TINUVIN326, hydroxyl value：1)

KEMISORB 111：2,2 '-dihydroxy -4- methoxy benzophenones, Chemipro are melted into company's manufacture, commodity Name：KEMISORB 111, hydroxyl value：2)

SEESORB 106：ESCALOL 567, SHIPRO are melted into company's manufacture, trade name：SEESORB 106, hydroxyl value：4)

＜ antioxidants ＞

Irganox1010：Pentaerythrite four [3- (3 ', 5 '-di-t-butyls -4 '-hydroxy phenyl) propionic ester], BASF systems It makes, trade name：Irganox1010

＜ wettability additives ＞

Isopropyl myristate, flower king's manufacture, trade name：Exceparl IPM

It is able to confirm that by above-mentioned table 2, in whole embodiments, it is suppressed that tone variations can prevent ultraviolet light solid Change, the raising of the bonding force after heating can be prevented.On the other hand, in comparative example 1, ultraviolet transmittance is slightly higher, ultraviolet light Deterioration preventing when irradiation is insufficient.In comparative example 2, the hydroxyl of used ultra-violet absorber is more, heats front and back glue The change rate of resultant force is big, leads to re-separation and is not suitable for the purposes gently removed, in comparative example 3, due to not having using ultraviolet Light absorbers, therefore it is able to confirm that ultraviolet transmittance is very high, it is not suitable for use in wanting to prevent ultraviolet curing (absorption) Material (component).

Industrial applicability

Optics disclosed herein is suitable as with surface protection film as liquid crystal display panel, plasma display panel (PDP), for protecting this when the manufacture of the optical component of the constituent element of organic electroluminescent (EL) display etc., when transporting etc. The surface protection film of optical component.Especially as liquid crystal display panel polarization plates, wave plate, phase plate, optical compensation films, The optical components such as brightness enhancement film, light diffusing sheet, reflector plate or optics surface protection film applied to components such as display glass It is useful.

Claims (6)

1. a kind of optics surface protection film, the list that there is the base material formed by polyester resin and be set to the base material The adhesive phase formed by adhesive composition in face, which is characterized in that

The b* values of the surface protection film be 2 hereinafter,

Transmissivity when the wavelength 365nm of the surface protection film be 2% hereinafter,

After described adhesive layer is pasted onto on glass, before bonding force after being heated 30 minutes at 100 DEG C is relative to heating Bonding force change rate be ± 30% or less.

2. optics surface protection film as described in claim 1, which is characterized in that described adhesive composition contains ultraviolet light Absorbent.

3. optics surface protection film as claimed in claim 2, which is characterized in that the intramolecular of the ultra-violet absorber Hydroxyl is 3 or less.

4. optics surface protection film according to any one of claims 1 to 3, which is characterized in that described adhesive combines Object contains (methyl) acrylic polymer and/or polyurethane polymer as basic polymer.

5. optics surface protection film as claimed in claim 4, which is characterized in that relative to 100 weight of the base polymer Part is measured, described adhesive composition contains the ultra-violet absorber of the parts by weight of 0.1 parts by weight~20.

6. such as optics surface protection film according to any one of claims 1 to 5, which is characterized in that the thickness of the base material It it is 6 μm~100 μm, the thickness of described adhesive layer is 1 μm~30 μm.