JP6614594B2 - Adhesive composition containing antistatic agent and adhesive film - Google Patents

Description

  The present invention relates to a pressure-sensitive adhesive composition containing an antistatic agent, and a pressure-sensitive adhesive film. More specifically, the present invention relates to a pressure-sensitive adhesive composition containing an alkoxysilyl group-containing ionic compound as an antistatic agent, and is excellent in antistatic properties without impairing the adhesive performance, and contains an alkoxysilyl group, so that it adheres to glass plates. In addition, the present invention relates to providing a pressure-sensitive adhesive composition that is excellent in reworkability on an adherend, and a pressure-sensitive adhesive film using the same.

Conventionally, in the manufacturing process and assembly process of precision parts and components such as electronic equipment parts, optical equipment parts, and image display panels, the surfaces of these precision parts and parts are temporarily protected from the working environment atmosphere. A surface protective film is adhered to the surface of precision parts and members in order to prevent adhesion of particles and gaseous contaminants, as well as generation of scratches and dents.
For example, a surface protective film used in a process for producing an optical member such as a polarizing plate or a retardation plate, which is a member constituting a liquid crystal display, is provided on one side of an optically transparent polyethylene terephthalate (PET) resin film. Although the pressure-sensitive adhesive layer is formed, a release film subjected to release treatment for protecting the pressure-sensitive adhesive layer is bonded onto the pressure-sensitive adhesive layer until it is bonded to the optical member.

In addition, optical members such as polarizing plates and retardation plates are subjected to product inspection with optical evaluation such as display capability, hue, contrast, and foreign matter mixing of the liquid crystal display plate in a state where the surface protective film is bonded. As the required performance for the surface protective film, it is required that no bubbles or foreign substances adhere to the pressure-sensitive adhesive layer.
Also, in recent years, when the surface protective film is peeled off from an optical member such as a polarizing plate or a retardation plate, the peeling electrification caused by the static electricity generated when the adherend peels off the adhesive layer is electrically controlled by the liquid crystal display. There is concern about the influence of circuit failure, and excellent antistatic properties are required for the adhesive layer.
In addition, the optical member often has a surface made of glass (inorganic glass, particularly non-alkali glass), and is required to have excellent adhesion to a glass plate.
In addition, when a surface protective film is bonded to an optical member such as a polarizing plate or a retardation plate, for various reasons, the surface protective film may be peeled off once, and then the surface protective film may be reattached. In addition, it is required to be easily peeled from the optical member of the adherend (reworkability).
Thus, in recent years, as the required performance for the pressure-sensitive adhesive layer constituting the surface protective film, the adhesiveness to the glass plate, excellent antistatic properties, reworkability to the adherend, etc. use the surface protective film. It is required from the viewpoint of ease of use.
However, the performance requirements for the pressure-sensitive adhesive layer constituting the surface protection film, which individually satisfy the performance requirements for adhesion to glass plates, excellent antistatic properties, and reworkability for the adherend. Even if it can, it has been a difficult task to satisfy the required performance required for the pressure-sensitive adhesive layer of the surface protective film at the same time at a low cost.

  As for the excellent antistatic property, as a method for imparting antistatic properties to the surface protective film, a method of kneading an antistatic agent into the base film is shown, and examples of the antistatic agent include (a) Various cationic antistatic agents having cationic groups such as quaternary ammonium salts, pyridinium salts, and primary to tertiary amino groups, (b) sulfonate groups, sulfate ester bases, phosphate ester bases, phosphonate bases Anionic antistatic agents having an anionic group such as (c) amino acid-based and aminosulfate-based amphoteric antistatic agents, (d) amino alcohol-based, glycerin-based, polyethylene glycol-based nonionic antistatic agents (E) A polymer type antistatic agent obtained by increasing the molecular weight of the antistatic agent as described above is disclosed (Patent Document 1).

Further, in recent years, it has been proposed that such an antistatic agent is contained in the base film or directly in the pressure-sensitive adhesive layer rather than being applied to the surface of the base film ( Patent Document 2).
In Patent Document 2, a polymerizable mixture containing (1) (a) urethane acrylate, (b) (meth) acrylate having a polyalkylene oxide chain, and (c) an adhesiveness-imparting monomer as radiation components is used as radiation. An antistatic pressure-sensitive adhesive composition containing a copolymer obtained by polymerization and (2) an ionic compound, and a pressure-sensitive adhesive sheet using the same are disclosed. As a specific method for producing a pressure-sensitive adhesive composition, urethane acrylate such as polyester urethane acrylate, (meth) acrylate monomer having a polyoxyalkylene chain such as methoxypolyethylene glycol acrylate, and adhesion such as hydroxypropyl acrylate An ionic compound such as lithium perchlorate is mixed in a polymerizable mixture containing a force-imparting monomer and optionally a further comonomer such as isooctyl acrylate, and a photoinitiator is added if necessary. It is said that a pressure-sensitive adhesive composition is obtained by stirring until it is completely dissolved and then irradiating with ultraviolet rays or the like to be cured.
However, since lithium perchlorate used as an ionic compound has metal corrosivity, there is a problem that the place where the obtained antistatic pressure-sensitive adhesive composition is used is limited.

Moreover, about the rework property with respect to the polarizing plate of a liquid crystal panel, it is 0.0001-10 weight part with respect to 100 weight part of acrylic resins about the hardening | curing agent of an isocyanate compound and a specific silicate oligomer, for example in acrylic resin. A blended pressure-sensitive adhesive composition has been proposed (Patent Document 3).
In Patent Document 3, an alkyl group having about 2 to 12 carbon atoms in an alkyl group or a methacrylic acid alkyl ester having about 4 to 12 carbon atoms in an alkyl group is used as a main monomer component. The functional group-containing monomer component can be included. In general, the main monomer is preferably contained in an amount of 50% by weight or more, and the content of the functional group-containing monomer component is 0.001 to 50% by weight, preferably 0.001 to 25% by weight, more preferably It is said that it is desired to be 0.01 to 25% by weight. Such a pressure-sensitive adhesive composition described in Patent Document 3 has a small effect on cohesive force and adhesive force over time even under high temperature or high temperature and high humidity, and exhibits an excellent effect on curved surface adhesive force. It is said to have sex.
In general, when the pressure-sensitive adhesive layer has a soft property, adhesive residue tends to be generated, and the reworkability tends to be lowered. That is, it is difficult to peel off when pasted by mistake, and it is difficult to re-paste. From this, it is considered necessary to make the pressure-sensitive adhesive layer have a certain hardness by crosslinking a monomer having a functional group such as a carboxyl group to the main agent in order to have reworkability.

Japanese Patent Laid-Open No. 11-070629 JP 2000-129235 A JP-A-8-199130

  An antistatic function is often required as an adhesive sheet, and various types of antistatic agents have been tried. However, particularly in the use of optical films, the antistatic function can be provided, but there are disadvantages such as poor transparency, and further, the adherence of the antistatic agent to the adhesive is insufficient. There are problems such as poor adhesion to the glass plate, durability does not improve, and further, the reworkability to the adherend is poor when the antistatic agent bleed out or the adhesive sheet is peeled off There were many. Even if these performances can be satisfied, there is a problem that the cost becomes high, and an adhesive containing an antistatic agent that can overcome these drawbacks at low cost has been required.

  The present invention has been made in view of the above circumstances, and is an antistatic agent that has excellent antistatic properties without impairing adhesive performance, excellent adhesion to glass plates, and excellent reworkability on adherends. It is an object of the present invention to provide a pressure-sensitive adhesive composition containing the above, and a pressure-sensitive adhesive film using the same.

  In order to solve the above-described problems, the present invention provides a pressure-sensitive adhesive composition containing an antistatic agent, the main component of which is a (meth) acrylic polymer, and the ionic compound represented by formula 1 as the antistatic agent. And an ionic compound having an organic cation containing a hydrolyzable silicon-containing group.

(However, in Formula 1, Z ^<+> shows a cation and X ^{< - >} shows an anion.)
The cation Z ⁺ of the ionic compound is preferably one or more alkoxysilyl group-containing cations represented by Formula 2.

(In the formula 2, R ¹ and R ² represent the same or different alkyl groups, n represents an integer of 1 to 3, Q ¹ represents an alkylene group having 1 to 10 carbon atoms, E Represents NH or S, Q ² represents a single bond or an alkylene group having 1 to 10 carbon atoms, Q ³ represents an alkylene group having 1 to 10 carbon atoms, and V ⁺ represents an ammonium group or a pyridinium group. Represents a monovalent cationic group selected from a pyrrolidinium group, an imidazolium group, a guanidinium group, an isouronium group, a thiouronium group, a piperidinium group, a pyrazolium group, a morpholinium group, a phosphonium group, and a sulfonium group. However, it may have a substituent.)
The hydrolyzable silicon-containing group is an alkoxysilyl group selected from a trimethoxysilyl group, a triethoxysilyl group, a methyldimethoxysilyl group, a methyldiethoxysilyl group, an ethyldimethoxysilyl group, and an ethyldiethoxysilyl group. It is preferable.

The (meth) acrylic polymer is a copolymerizable vinyl containing (A) at least one alkyl (meth) acrylate monomer having a C1-C14 alkyl group and (B) a hydroxyl group and / or a carboxyl group. A copolymer composition comprising at least one monomer, and the antistatic agent contains (C) 0 to the ionic compound represented by Formula 1 with respect to 100 parts by weight of the copolymer composition. It is preferable to contain 1-20 weight part as an essential component.
The (meth) acrylic polymer comprises (A) at least one alkyl (meth) acrylate monomer having an alkyl group with C1-C14 carbon atoms and (B ′) at least one copolymerizable vinyl monomer having a vinyl group. And 100 parts by weight of the copolymer composition, the antistatic agent (C) contains 0.1 to 20 ionic compounds represented by the formula 1 above. It is preferable to contain a weight part as an essential component.
The (meth) acrylic polymer is a copolymer composition composed of at least two kinds of (A) alkyl (meth) acrylate monomers having an alkyl group with C1 to C14 carbon atoms, and 100 weight of the copolymer composition It is preferable that the antistatic agent contains 0.1 to 20 parts by weight of the ionic compound represented by the formula 1 as an essential component with respect to parts.

The surface resistivity of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition is preferably 1.0 × 10 ⁺¹² Ω / □ or less.
The anion X ⁻ of the ionic compound is hexafluorophosphate anion, bis (fluorosulfonyl) imide anion, tris (pentafluoroethyl) trifluorophosphate anion, bis (trifluoromethanesulfonyl) imide anion, thiocyanate anion, alkylbenzene It is preferable that it is 1 type, or 2 or more types selected from the inorganic or organic anion group which consists of a sulfonate anion, a perchlorate anion salt, and a tetrafluoroborate anion.

Moreover, this invention provides the adhesive film characterized by laminating | stacking the said adhesive composition on the single side | surface of a base material.
Moreover, this invention provides the adhesive film characterized by laminating | stacking the adhesive layer which consists of the said adhesive composition on the single side | surface of a base material.
Moreover, this invention provides the surface protection film using the said adhesive film.
Moreover, this invention provides the surface protection film for polarizing plates in which the said adhesive film was used.
Moreover, this invention provides the surface protection film for optics using the said adhesive film.
Moreover, this invention provides the optical film with an adhesive by which the adhesive layer which consists of the said adhesive composition is laminated | stacked on the at least one surface of the optical film.
The optical film of the optical film with an adhesive is preferably a polarizing plate.
Moreover, this invention provides the image display apparatus by which the said optical film with an adhesive is bonded together through the said adhesive layer.

  According to the present invention, by using a pressure-sensitive adhesive containing an antistatic agent having a hydrolyzable silicon-containing group, particularly an alkoxysilyl group, it has excellent adhesion to a glass plate and has antistatic properties and adhesion. Problems such as defects such as reworkability on the body can be improved.

Hereinafter, the present invention will be described based on preferred embodiments.
The pressure-sensitive adhesive composition of the present invention has a pressure-sensitive adhesive polymer as a main component of a pressure-sensitive adhesive and an antistatic agent imparting antistatic properties. As this antistatic agent, a hydrolyzable silicon-containing group, particularly an alkoxysilyl group. An ionic compound having a group is contained.
Thereby, it is excellent in the adhesiveness with respect to a glass plate, and it becomes possible to improve subjects, such as defects, such as antistatic property and rework property with respect to a to-be-adhered body.

The pressure-sensitive adhesive polymer used in the present invention is preferably an acrylic polymer, and in particular, (A) a copolymer composition mainly comprising at least one alkyl (meth) acrylate monomer having an alkyl group with C1 to C14 carbon atoms. Is preferred.
(A) Alkyl (meth) acrylate monomers having an alkyl group with C1 to C14 include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, and isobutyl (meth). Acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) Examples include acrylate, decyl (meth) acrylate, cyclopentyl (meth) acrylate, and cyclohexyl (meth) acrylate. The alkyl group of the alkyl (meth) acrylate monomer may be linear, branched or cyclic.

As the pressure-sensitive adhesive polymer used in the present invention, a copolymer composition comprising (A) at least one alkyl (meth) acrylate monomer having an alkyl group having C1 to C14 and at least one other copolymerizable monomer. You can also use things. In this case, examples of the other copolymerizable monomer include (B ′) a copolymerizable vinyl monomer having a vinyl group, and (B) a copolymerizable vinyl monomer having a hydroxyl group and / or a carboxyl group.
Examples of the copolymerizable vinyl monomer containing a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6- Hydroxyl-containing (meth) acrylic esters such as hydroxyhexyl (meth) acrylate and 8-hydroxyoctyl (meth) acrylate, N-hydroxy (meth) acrylamide, N-hydroxymethyl (meth) acrylamide, N-hydroxyethyl ( Examples include hydroxyl group-containing (meth) acrylamides such as (meth) acrylamide, and at least one selected from these compound groups is preferable.
Examples of the copolymerizable vinyl monomer containing a carboxyl group include (meth) acrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, and the like. Preferably, at least one selected from these compound groups is used.
Other copolymerizable vinyl monomers include aromatic group-containing (meth) acrylic esters such as benzyl (meth) acrylate and phenoxyethyl (meth) acrylate, as well as styrene, acrylamide, acrylonitrile, methyl vinyl ether, ethyl vinyl ether And various vinyl monomers such as vinyl acetate and vinyl chloride.

  Moreover, as an adhesive polymer used for this invention, the copolymer composition which consists of at least 2 or more types of the alkyl (meth) acrylate monomer whose carbon number of (A) alkyl group is C1-C14 can also be employ | adopted. In this case, the copolymer composition can be obtained without using a copolymerizable vinyl monomer other than the alkyl (meth) acrylate monomer having (A) an alkyl group having C1 to C14 carbon atoms.

The ionic compound used as an antistatic agent in the present invention is represented by the formula 1, and its cation Z ⁺ is an organic cation having a hydrolyzable silicon-containing group. The ionic compound may be an ionic liquid that becomes liquid at room temperature (for example, 30 ° C.), or may be solid at room temperature.

Z ⁺ X ⁻ (Formula 1)

(However, in Formula 1, Z ^<+> shows a cation and X ^{< - >} shows an anion.)

The anion X ⁻ of the ionic compound is hexafluorophosphate anion, bis (fluorosulfonyl) imide anion, tris (pentafluoroethyl) trifluorophosphate anion, bis (trifluoromethanesulfonyl) imide anion, thiocyanate anion, alkylbenzene It is preferable that it is 1 type, or 2 or more types selected from the inorganic or organic anion group which consists of a sulfonate anion, a perchlorate anion salt, and a tetrafluoroborate anion.

The cation Z ⁺ of the ionic compound is pyridinium cation, imidazolium cation, sulfonium cation, phosphonium cation, pyrrolidinium cation, guanidinium cation, ammonium cation, isouronium cation, thiouronium cation, piperidinium cation. , A pyrazolium cation, a morpholinium cation, or the like.
The cation Z ⁺ is an organic cation having a hydrolyzable silicon-containing group.

  As the hydrolyzable silicon-containing group, an alkoxysilyl group, an alkenyloxysilyl group, an acyloxysilyl group, an aminosilyl group, an aminooxysilyl group, an oximesilyl group, an amidosilyl group and the like are preferably used. Of these, an alkoxysilyl group represented by the formula 1a is preferable.

(R ¹ O) _n (R ² ) _3-n Si- (Formula 1a)

However, in Formula 1b, R ¹ and R ² represent the same or different alkyl groups, and n represents an integer of 1 to 3.

Examples of the alkoxysilyl group include an alkoxydialkylsilyl group (n = 1), an alkyldialkoxysilyl group (n = 2), and a trialkoxysilyl group (n = 3). Alkyl dialkoxysilyl groups (n = 2) or trialkoxysilyl groups (n = 3) are preferred.
Examples of the alkoxy group (R ¹ O) include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, and an isobutoxy group.
Examples of the alkyl group (R ² ) include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, and an isobutyl group.

  Specific examples of the alkoxysilyl group include trimethoxysilyl groups (formula 1a-1), triethoxysilyl groups (formula 1a-2), and methyldimethoxysilyl represented by the following formulas 1a-1 to 1a-6. Examples include a group (formula 1a-3), a methyldiethoxysilyl group (formula 1a-4), an ethyldimethoxysilyl group (formula 1a-5), an ethyldiethoxysilyl group (formula 1a-6), and the like.

_(CH 3 _O) 3 Si- (wherein 1a-1)
_{(C 2 H 5 O) 3} Si- ( wherein 1a-2)
(CH ₃ ) (CH ₃ O) ₂ Si— (Formula 1a-3)
_{(CH 3) (C 2 H} 5 O) 2 Si- ( Formula 1a-4)
_{(C 2 H 5) (CH} 3 O) 2 Si- ( Formula 1a-5)
_{(C 2 H 5) (C} 2 H 5 O) 2 Si- ( Formula 1a-6)

In other hydrolyzable silicon-containing groups, hydrolyzable groups that can be used in place of the alkoxy group (R ¹ O) include vinyloxy groups, 1-methylvinyloxy groups, 1-ethylvinyloxy groups, and the like. Alkenyloxy group; acyloxy group such as acetyloxy group, propanoyloxy group, benzoyloxy group; amino group such as dimethylamino group, methylethylamino group, diethylamino group; dimethylaminooxy group, methylethylaminooxy group, diethylaminooxy An aminooxy group such as a group; an oxime group such as (CH ₃ ) ₂ C═NO— or (C ₂ H ₅ ) ₂ C═NO—; a CH ₃ CON (CH ₃ ) — or C ₂ H ₅ CON (CH ₃ )-And the like. These hydrolyzable groups L have hydrolyzability when bonded to Si atoms of the silyl group.

The silyl group in the hydrolyzable silicon-containing group may be a siloxane group. Examples of the hydrolyzable silicon-containing group having a siloxane group include those represented by the formula 1a ′ and those having the hydrolyzable group such as an alkenyloxy group instead of an alkoxy group (R ¹ O). Is mentioned.

(R ² ) ₃ SiO (R ¹ O) ₂ Si— (Formula 1a ′)

The cation Z ⁺ of the ionic compound is preferably one or more alkoxysilyl group-containing cations represented by the formula 1b.

(R ¹ O) _n (R ² ) _3-n Si-QV ⁺ (Formula 1b)

However, in Formula 1b, R ¹ and R ² represent the same or different alkyl groups, and n represents an integer of 1 to 3.
Q represents an alkylene group having 1 to 20 carbon atoms, and the alkylene group may be linear or branched, and may be a non-substituted group or a substituent. The main chain of the alkylene group includes an ether bond (—O—), a sulfide bond (—S—), an imino group (—NH—), a carbonyl group (—CO—), an ester bond (—COO— or —OCO). -), An amide bond (-CONH- or -NHCO-), a carbonate bond (-OCOO-), a urethane bond (-NHCOO- or -OCONH-), a hetero group constituting a functional group such as a urea bond (-NHCONH-) One or two or more atoms (atoms of elements other than carbon and hydrogen, such as O, S, and N) may be included.
However, when the main chain of the alkylene group Q has a hetero atom, the number of the hetero atom is not included in the carbon number of the alkylene group. In the alkylene group Q, an atom adjacent to Si of the silicon-containing group is not a heteroatom but a carbon atom.
V ⁺ represents a monovalent cation group selected from an ammonium group, a pyridinium group, a pyrrolidinium group, an imidazolium group, a guanidinium group, an isouronium group, a thiouronium group, a piperidinium group, a pyrazolium group, a morpholinium group, a phosphonium group, and a sulfonium group. As shown, the cationic group V ⁺ may be a non-substituted group or may have a substituent.

  Examples of the substituent that the alkylene group Q may have include alkyl groups such as a methyl group, an ethyl group, a propyl group, and a butyl group; a phenyl group, a naphthyl group, a 4-methylphenyl group, and a 4-methoxyphenyl group. An aryl group which may have a substituent of: methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, isobutoxy group, sec-butoxy group, tert-butoxy group, trifluoromethoxy group, benzyloxy group An alkoxy group which may have a substituent such as: a phenoxy group, a 2-methylphenoxy group, a 4-methylphenoxy group, a 4-methoxyphenoxy group, a 3-phenoxyphenoxy group, etc. Good aryloxy groups; halogen atoms such as fluorine atom and chlorine atom are exemplified. When the alkylene group has a substituent, the carbon number of the substituent is not included in the carbon number of the alkylene group.

The alkylene group Q may be any linking group that links a hydrolyzable silicon-containing group (such as an alkoxysilyl group) and a cationic group (V ⁺ ). For example, —C _i H _2i —, —C _{i H 2i OC j H 2j -,} - C i H 2i SC j H 2j -, - C i H 2i NHC j H 2j -, - C i H 2i COC j H 2j -, - C i H 2i COOC j H 2j _{-, - C i H 2i OCOC} j H 2j -, - C i H 2i NHCOC j H 2j -, - C i H 2i CONHC j H 2j -, - C i H 2i OCOOC j H 2j -, - C i H _{2i NHCOOC j H 2j -, -} C i H 2i OCONHC j H 2j -, - C i H 2i NHCONHC j H 2j -, - C i H 2i OC j H 2j OC k H 2k -, - C _{i H 2i OC j H 2j COOC} k H 2k -, - C i H 2i NHC j H 2j COOC k H 2k -, - C i H 2i SC j H 2j COOC k H 2k -, and the like (provided that, i, j, and k are integers of 1 or more).
Examples of the alkylene group represented by C _i H _2i , C _j H _2j , and C _k H _2k include —CH ₂ —, —CH ₂ CH ₂ —, —C (CH ₃ ) —, and —CH ₂ CH. ₂ CH ₂ —, —CH ₂ C (CH ₃ ) —, —C (CH ₃ ) CH ₂ —, —CH ₂ CH ₂ CH ₂ CH ₂ —, etc. A hydrocarbon group is mentioned.
In the case where the linking group Q has a hetero atom in the main chain of the alkylene group, it is preferable that those hetero atoms constitute a chemical bond that is difficult to be cleaved by hydrolysis or the like. Thereby, the connecting group Q can exhibit a function as a connecting group that connects a hydrolyzable silicon-containing group (such as an alkoxysilyl group) and a cationic group (V ⁺ ).

The cation Z ⁺ of the ionic compound is preferably one or more alkoxysilyl group-containing cations represented by Formula 2.

^{_{(R 1 O) n (R}} 2) 3-n Si-Q 1 -E-Q 2 -COO-Q 3 -V + ( Equation 2)

(In the formula 2, R ¹ and R ² represent the same or different alkyl groups, n represents an integer of 1 to 3, Q ¹ represents an alkylene group having 1 to 10 carbon atoms, E Represents NH or S, Q ² represents a single bond or an alkylene group having 1 to 10 carbon atoms, Q ³ represents an alkylene group having 1 to 10 carbon atoms, and V ⁺ represents an ammonium group or a pyridinium group. Represents a monovalent cationic group selected from a pyrrolidinium group, an imidazolium group, a guanidinium group, an isouronium group, a thiouronium group, a piperidinium group, a pyrazolium group, a morpholinium group, a phosphonium group, and a sulfonium group. However, it may have a substituent.)

The ammonium group, trialkylammonium group ^(-N + _{R 3)} and dialkyl ammonium group ^(-N + HR ₂₎ and the like. The phosphonium groups, trialkyl phosphonium group ^(-P + _{R 3)} and dialkyl phosphonium group ^(-P + HR ₂₎ and the like. Examples of the sulfonium group include a dialkylsulfonium group (—S ⁺ R ₂ ). R in these formulas represents the same or different alkyl group.

Pyridinium group, pyrrolidinium group, imidazolium group, guanidinium group, isouronium group, thiouronium group, piperidinium group, pyrazolium group, and morpholinium group are respectively pyridinium, pyrrolidinium, imidazolium, guanidinium, isouronium, thiouronium, piperidinium, morpholinium, morpholinium, and morpholinium And a group capable of binding to Q ³ in the nitrogen atom or carbon atom, or the oxygen atom of isouronium or the sulfur atom of thiouronium.

Examples of the substituent that the cationic group (V ⁺ ) may have include alkyl groups such as a methyl group, an ethyl group, a propyl group, and a butyl group; a phenyl group, a naphthyl group, a 4-methylphenyl group, and 4-methoxy. Aryl group optionally having a substituent such as phenyl group; methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, isobutoxy group, sec-butoxy group, tert-butoxy group, trifluoromethoxy group, An alkoxy group which may have a substituent such as a benzyloxy group; a substituent such as a phenoxy group, a 2-methylphenoxy group, a 4-methylphenoxy group, a 4-methoxyphenoxy group and a 3-phenoxyphenoxy group; An aryloxy group which may be present; halogen atoms such as fluorine atom and chlorine atom are exemplified.

Examples of the cation Z ⁺ used in the present invention include trialkyl (alkoxysilylalkyl) ammonium, trialkyl ([({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl]) ammonium, trialkyl ([({ Hydrolyzable silicon-containing, such as [(alkoxysilyl) alkyl] amino} acyl) oxy] alkyl}) ammonium, trialkyl ([({[(alkoxysilyl) alkyl] sulfanyl} acyl) oxy] alkyl}) ammonium An ammonium cation having a group;
1-[(alkoxysilyl) alkyl] pyridinium, 1-[({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl] pyridinium, 1-[({[(alkoxysilyl) alkyl] amino} acyl) oxy] alkyl } Pyridinium, pyridinium cations having hydrolyzable silicon-containing groups, such as 1-[({[(alkoxysilyl) alkyl] sulfanyl} acyl) oxy] alkyl} pyridinium;

1-alkyl-1-[(alkoxysilyl) alkyl] pyrrolidinium, 1-alkyl-1-[({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl] pyrrolidinium, 1-alkyl-1-[({[( Hydrolyzable silicon-containing groups such as alkoxysilyl) alkyl] amino} acyl) oxy] alkyl} pyrrolidinium, 1-alkyl-1-[({[(alkoxysilyl) alkyl] sulfanyl} acyl] oxy] alkyl} pyrrolidinium A pyrrolidinium cation having
1-alkyl-3-[(alkoxysilyl) alkyl] imidazolium, 1,2-dialkyl-3-[(alkoxysilyl) alkyl] imidazolium, 1-alkyl-3-[({[(alkoxysilyl) alkyl] Carbamoyl} oxy) alkyl] imidazolium, 1-alkyl-3-[({[(alkoxysilyl) alkyl] amino} acyl) oxy] alkyl} imidazolium, 1-alkyl-3-[({[(alkoxysilyl) Imidazolium cations having hydrolyzable silicon-containing groups, such as alkyl] sulfanyl} acyl) oxy] alkyl} imidazolium;

Hydrolyzable such as 1-[(alkoxysilyl) alkyl] guanidinium, 2-[(alkoxysilyl) alkyl] guanidinium, 1,1,3,3-tetraalkyl-2-[(alkoxysilyl) alkyl] guanidinium A guanidinium cation having a silicon-containing group;
2-alkyl-1-[(alkoxysilyl) alkyl] isouronium, 2-[(alkoxysilyl) alkyl] isouronium, 1,1,3,3-tetraalkyl-2-[(alkoxysilyl) alkyl] isouronium, An isouronium cation having a hydrolyzable silicon-containing group;
2-alkyl-1-[(alkoxysilyl) alkyl] thiouronium, 1-alkyl-2-[(alkoxysilyl) alkyl] thiouronium, 1,1,3,3-tetraalkyl-2-[(alkoxysilyl) alkyl] A thiouronium cation having a hydrolyzable silicon-containing group, such as thiouronium;

1-alkyl-1-[(alkoxysilyl) alkyl] piperidinium, 1-alkyl-1-[({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl] piperidinium, 1-alkyl-1-[({[( Hydrolyzable silicon-containing groups such as alkoxysilyl) alkyl] amino} acyl) oxy] alkyl} piperidinium, 1-alkyl-1-[({[(alkoxysilyl) alkyl] sulfanyl} acyl] oxy] alkyl} piperidinium A piperidinium cation having:
1-alkyl-2-[(alkoxysilyl) alkyl] pyrazolium, 1-alkyl-2-[({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl] pyrazolium, 1-alkyl-2-[({[( Hydrolyzable silicon-containing groups such as alkoxysilyl) alkyl] amino} acyl) oxy] alkyl} pyrazolium, 1-alkyl-2-[({[(alkoxysilyl) alkyl] sulfanyl} acyl] oxy] alkyl} pyrazolium A pyrazolium cation having:
4-alkyl-4-[(alkoxysilyl) alkyl] morpholinium, 4-alkyl-4-[({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl] morpholinium, 4-alkyl-4-[({[( Hydrolyzable silicon-containing groups such as alkoxysilyl) alkyl] amino} acyl) oxy] alkyl} morpholinium, 4-alkyl-4-[({[(alkoxysilyl) alkyl] sulfanyl} acyl] oxy] alkyl} morpholinium A morpholinium cation having

Trialkyl [(alkoxysilyl) alkyl] phosphonium, trialkyl ([({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl]) phosphonium, trialkyl ([({[(alkoxysilyl) alkyl] amino} acyl) Oxy] alkyl}) phosphonium, trialkyl ([({[(alkoxysilyl) alkyl] sulfanyl} acyl) oxy] alkyl}) phosphonium and the like, phosphonium cations having hydrolyzable silicon-containing groups;
Dialkyl [(alkoxysilyl) alkyl] sulfonium, dialkyl ([({[(alkoxysilyl) alkyl] carbamoyl} oxy) alkyl]) sulfonium, dialkyl ([({[(alkoxysilyl) alkyl] amino} acyl) oxy] alkyl }) Sulfonium, dialkyl ([({[(alkoxysilyl) alkyl] sulfanyl} acyl) oxy] alkyl}) sulfonium cations having hydrolyzable silicon-containing groups;
Etc.

Specific examples of the cation Z ⁺ used in the present invention include, for example,
Trimethyl ([2-({[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium, trimethyl ([2-({[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl]) Ammonium, trimethyl ([2-({[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium, trimethyl ([2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) Ethyl]) ammonium, trimethyl ([2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium, trimethyl ([2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl) } Oxy) ethyl]) ammonium,
1- [2-({[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium, 1- [2-({[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium, 1- [2-({[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium, 1- [2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium , 1- [2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium, 1- [2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] Pyridinium,
Trimethyl ({2-[(3-{[3- (trimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium, trimethyl ({2-[(3-{[3- (triethoxysilyl) propyl] ] Amino} propanoyl) oxy] ethyl}) ammonium, trimethyl ({2-[(3-{[3- (methyldimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium, trimethyl ({2-[( 3-{[3- (methyldiethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium, trimethyl ({2-[(3-{[3- (ethyldimethoxysilyl) propyl] amino} propanoyl) oxy ] Ethyl}) ammonium, trimethyl ({2-[(3-{[3- (ethyldiethoxysilane) ) Propyl] amino} propanoyl) oxy] ethyl}) ammonium,
Trimethyl ({2-[(2-methyl-3-{[3- (trimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium, trimethyl ({2-[(2-methyl-3-{[ 3- (triethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium, trimethyl ({2-[(2-methyl-3-{[3- (methyldimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] Ethyl}) ammonium, trimethyl ({2-[(2-methyl-3-{[3- (methyldiethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium, trimethyl ({2-[(2- Methyl-3-{[3- (ethyldimethoxysilyl) propyl] sulfanyl} propanoy ) Oxy] ethyl}) ammonium, trimethyl ({2 - [(2-methyl-3 - {[3- (ethyl-diethoxy silyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium,
Etc.

The compound represented by the above formula 2 can be synthesized using a known synthesis method.
For ^{_{example, (R 1 O) n (}} R 2) 3-n Si-Q-V + in compounds represented ^{_{is, (R 1 O) n (}} R 2) 3-n Si-Q-Hal ( However, Hal Represents a halogen such as Cl, Br, I, etc.) and can be synthesized by reacting with a compound such as amine or imidazole.
^{_{Further, (R 1 O) n (}} R 2) 3-n Si-Q 1 -NH-COO-Q 3 -V + in compounds represented ^{_{is, (R 1 O) n (}} R 2) 3-n Si It can also be synthesized by reacting a compound represented by -Q ¹ -NCO with a compound represented by HO-Q ³ -V ⁺ .

Specific examples of the anion X ⁻ used in the present invention include tetrafluoroboric acid [BF ₄ ⁻ ], hexafluorophosphoric acid [PF ₆ ⁻ ], tris (pentafluoroethyl) trifluorophosphate [PF ₃ (C ₂ F ₅ ) ₃ ⁻ ], bis (fluorosulfonyl) imide [(FSO ₂ ) ₂ N ⁻ ], bis (trifluoromethanesulfonyl) imide [(CF ₃ SO ₂ ) ₂ N ⁻ ], bis (pentafluoroethanesulfonyl) Imido [(C ₂ F ₅ SO ₂ ) ₂ N ⁻ ], bis (heptafluoropropanesulfonyl) imide [(C ₃ F ₇ SO ₂ ) ₂ N ⁻ ], (trifluoromethanesulfonyl) (pentafluoroethanesulfonyl) imide [ _{(CF 3 SO 2) (C} 2 F 5 SO 2) N -], ( trifluoromethanesulfonyl) (Heputafuru B propanesulfonyl) imide _{[(CF 3 SO 2) (} C 3 F 7 SO 2) N -], ( trifluoromethanesulfonyl) (nonafluorobutanesulfonyl) imide _{[(CF 3 SO 2) (} C 4 F 9 SO 2 ) N ⁻ ] and the like.
_{^{Among, BF 4 -, PF 6 -}} , PF 3 (C 2 F 5) 3 -, (FSO 2) 2 N -, (CF 3 SO 2) 2 N - is preferred.

Specific examples of the ionic compound (Z ⁺ .X ⁻ ) used in the present invention include a combination of the above-mentioned preferable cation Z ⁺ and a preferable anion X ⁻ .
Trimethyl ([2-({[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium bis (fluorosulfonyl) imide salt, trimethyl ([2-({[3- (trimethoxysilyl) propyl]] Carbamoyl} oxy) ethyl]) ammonium hexafluorophosphate, trimethyl ([2-({[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tetrafluoroborate, trimethyl ([ 2-({[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tris (pentafluoroethyl) trifluorophosphate salt,
Trimethyl ([2-({[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium bis (fluorosulfonyl) imide salt, trimethyl ([2-({[3- (triethoxysilyl) propyl]] Carbamoyl} oxy) ethyl]) ammonium hexafluorophosphate, trimethyl ([2-({[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tetrafluoroborate, trimethyl ([ 2-({[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tris (pentafluoroethyl) trifluorophosphate salt,
Trimethyl ([2-({[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium bis (fluorosulfonyl) imide salt, trimethyl ([2-({[3- (methyldimethoxysilyl) propyl] Carbamoyl} oxy) ethyl]) ammonium hexafluorophosphate, trimethyl ([2-({[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tetrafluoroborate, trimethyl ([ 2-({[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tris (pentafluoroethyl) trifluorophosphate salt,
Trimethyl ([2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium bis (fluorosulfonyl) imide salt, trimethyl ([2-({[3- (methyldiethoxysilyl) Propyl] carbamoyl} oxy) ethyl]) ammonium hexafluorophosphate, trimethyl ([2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tetrafluoroborate, Trimethyl ([2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tris (pentafluoroethyl) trifluorophosphate salt,
Trimethyl ([2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium bis (fluorosulfonyl) imide salt, trimethyl ([2-({[3- (ethyldimethoxysilyl) propyl] Carbamoyl} oxy) ethyl]) ammonium hexafluorophosphate, trimethyl ([2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tetrafluoroborate, trimethyl ([ 2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tris (pentafluoroethyl) trifluorophosphate salt,
Trimethyl ([2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium bis (fluorosulfonyl) imide salt, trimethyl ([2-({[3- (ethyldiethoxysilyl) Propyl] carbamoyl} oxy) ethyl]) ammonium hexafluorophosphate, trimethyl ([2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tetrafluoroborate, Trimethyl ([2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl]) ammonium tris (pentafluoroethyl) trifluorophosphate salt,

1- [2-({[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium bis (fluorosulfonyl) imide salt, 1- [2-({[3- (trimethoxysilyl) propyl] carbamoyl } Oxy) ethyl] pyridinium hexafluorophosphate, 1- [2-({[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tetrafluoroborate, 1- [2- ( {[3- (trimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tris (pentafluoroethyl) trifluorophosphate salt,
1- [2-({[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium bis (fluorosulfonyl) imide salt, 1- [2-({[3- (triethoxysilyl) propyl] carbamoyl } Oxy) ethyl] pyridinium hexafluorophosphate, 1- [2-({[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tetrafluoroborate, 1- [2- ( {[3- (triethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tris (pentafluoroethyl) trifluorophosphate salt,
1- [2-({[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium bis (fluorosulfonyl) imide salt, 1- [2-({[3- (methyldimethoxysilyl) propyl] carbamoyl } Oxy) ethyl] pyridinium hexafluorophosphate, 1- [2-({[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tetrafluoroborate, 1- [2- ( {[3- (methyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tris (pentafluoroethyl) trifluorophosphate salt,
1- [2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium bis (fluorosulfonyl) imide salt, 1- [2-({[3- (methyldiethoxysilyl) propyl ] Carbamoyl} oxy) ethyl] pyridinium hexafluorophosphate, 1- [2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tetrafluoroborate, 1- [ 2-({[3- (methyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tris (pentafluoroethyl) trifluorophosphate salt,
1- [2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium bis (fluorosulfonyl) imide salt, 1- [2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl } Oxy) ethyl] pyridinium hexafluorophosphate, 1- [2-({[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tetrafluoroborate, 1- [2- ( {[3- (ethyldimethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tris (pentafluoroethyl) trifluorophosphate salt,
1- [2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium bis (fluorosulfonyl) imide salt, 1- [2-({[3- (ethyldiethoxysilyl) propyl ] Carbamoyl} oxy) ethyl] pyridinium hexafluorophosphate, 1- [2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tetrafluoroborate, 1- [ 2-({[3- (ethyldiethoxysilyl) propyl] carbamoyl} oxy) ethyl] pyridinium tris (pentafluoroethyl) trifluorophosphate salt,

Trimethyl ({2-[(3-{[3- (trimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(3-{[3 -(Trimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(3-{[3- (trimethoxysilyl) propyl] amino} propanoyl) oxy ] Ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(3-{[3- (trimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) trifluorophos Fate salt,
Trimethyl ({2-[(3-{[3- (triethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(3-{[3 -(Triethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(3-{[3- (triethoxysilyl) propyl] amino} propanoyl) oxy ] Ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(3-{[3- (triethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) trifluorophos Fate salt,
Trimethyl ({2-[(3-{[3- (methyldimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(3-{[3 -(Methyldimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(3-{[3- (methyldimethoxysilyl) propyl] amino} propanoyl) oxy ] Ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(3-{[3- (methyldimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) trifluorophos Fate salt,
Trimethyl ({2-[(3-{[3- (methyldiethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(3-{[ 3- (methyldiethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(3-{[3- (methyldiethoxysilyl) propyl] amino} Propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(3-{[3- (methyldiethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium tris (pentafluoro Ethyl) trifluorophosphate salt,
Trimethyl ({2-[(3-{[3- (ethyldimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(3-{[3 -(Ethyldimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(3-{[3- (ethyldimethoxysilyl) propyl] amino} propanoyl) oxy ] Ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(3-{[3- (ethyldimethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) trifluorophos Fate salt,
Trimethyl ({2-[(3-{[3- (ethyldiethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(3-{[ 3- (ethyldiethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(3-{[3- (ethyldiethoxysilyl) propyl] amino} Propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(3-{[3- (ethyldiethoxysilyl) propyl] amino} propanoyl) oxy] ethyl}) ammonium tris (pentafluoro Ethyl) trifluorophosphate salt,

Trimethyl ({2-[(2-methyl-3-{[3- (trimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(2 -Methyl-3-{[3- (trimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(2-methyl-3-{[3- (Trimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(2-methyl-3-{[3- (trimethoxysilyl) propyl] sulfanyl}) Propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) trifluorophosphine Over door salt,
Trimethyl ({2-[(2-methyl-3-{[3- (triethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(2 -Methyl-3-{[3- (triethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(2-methyl-3-{[3- (Triethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(2-methyl-3-{[3- (triethoxysilyl) propyl] sulfanyl}) Propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) trifluorophosphine Over door salt,
Trimethyl ({2-[(2-methyl-3-{[3- (methyldimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(2 -Methyl-3-{[3- (methyldimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(2-methyl-3-{[3- (Methyldimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(2-methyl-3-{[3- (methyldimethoxysilyl) propyl] sulfanyl}) Propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) tri Le Oro phosphate salt,
Trimethyl ({2-[(2-methyl-3-{[3- (methyldiethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[( 2-methyl-3-{[3- (methyldiethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(2-methyl-3-{[ 3- (methyldiethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(2-methyl-3-{[3- (methyldiethoxysilyl) Propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) tri Le Oro phosphate salt,
Trimethyl ({2-[(2-methyl-3-{[3- (ethyldimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[(2 -Methyl-3-{[3- (ethyldimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(2-methyl-3-{[3- (Ethyldimethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(2-methyl-3-{[3- (ethyldimethoxysilyl) propyl] sulfanyl}) Propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) tri Le Oro phosphate salt,
Trimethyl ({2-[(2-methyl-3-{[3- (ethyldiethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium bis (fluorosulfonyl) imide salt, trimethyl ({2-[( 2-methyl-3-{[3- (ethyldiethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium hexafluorophosphate, trimethyl ({2-[(2-methyl-3-{[ 3- (ethyldiethoxysilyl) propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tetrafluoroborate, trimethyl ({2-[(2-methyl-3-{[3- (ethyldiethoxysilyl) Propyl] sulfanyl} propanoyl) oxy] ethyl}) ammonium tris (pentafluoroethyl) tri Le Oro phosphate salt,
Etc.

  The antistatic agent is preferably (C) 0.1 to 20 parts by weight of the ionic compound represented by the formula 1 with respect to 100 parts by weight of the copolymer composition of the pressure-sensitive adhesive polymer used in the present invention, and more preferably. Is preferably contained in an amount of 0.1 to 10 parts by weight.

The surface resistivity of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition is preferably 1.0 × 10 ⁺¹² Ω / □ or less. If the surface resistivity is high, the performance of releasing static electricity generated by electrification at the time of peeling is inferior. Therefore, by making the surface resistivity sufficiently small, the peeling zone that occurs when the adherend peels off the adhesive layer. The voltage is reduced, and it is possible to suppress the influence on the electric control circuit and the like of the adherend.

The pressure-sensitive adhesive composition of the present invention preferably crosslinks the pressure-sensitive adhesive polymer when forming the pressure-sensitive adhesive layer. In order to perform crosslinking, the pressure-sensitive adhesive composition may contain a known crosslinking agent, or may be crosslinked by photocrosslinking such as ultraviolet (UV). Examples of the crosslinking agent include bifunctional or higher isocyanate compounds, bifunctional or higher epoxy compounds, bifunctional or higher acrylate compounds, and metal chelate compounds.
Further, as other components, known additives such as silane coupling agents, antioxidants, surfactants, curing accelerators, plasticizers, fillers, curing retarders, processing aids, anti-aging agents, and the like are appropriately blended. Can do. These may be used alone or in combination of two or more.

The pressure-sensitive adhesive film of the present invention is obtained by laminating a pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition of the present invention on one side of a base film. The pressure-sensitive adhesive film of the present invention can be suitably used for a surface protective film, a surface protective film for a polarizing plate, an optical surface protective film, an optical film with a pressure-sensitive adhesive, a polarizing plate with a pressure-sensitive adhesive, and the like.
As the base film of the pressure-sensitive adhesive layer and the release film (separator) that protects the pressure-sensitive adhesive surface, a resin film such as a polyester film can be used.
On the base film, on the side opposite to the side where the adhesive layer of the resin film is formed, antifouling treatment with silicone-based, fluorine-based release agent or coating agent, silica fine particles, etc., application of antistatic agent, An antistatic treatment such as kneading can be performed.
The release film is subjected to a release treatment with a silicone-based or fluorine-based release agent or the like on the surface of the pressure-sensitive adhesive layer that is to be combined with the pressure-sensitive adhesive surface.
In the case of an optical surface protective film such as a polarizing plate surface protective film, the base film and the pressure-sensitive adhesive layer preferably have sufficient transparency.

In the optical film with an adhesive, an optical film such as a polarizing plate film, a retardation film, a lens film, a polarizing film that also serves as a retardation film, and a polarizing film that also serves as a lens film can be used as a base film. .
An optical film with an adhesive is formed by laminating an adhesive layer on one side or both sides of an optical film, and can be used for bonding to a glass plate or the like of an image display device. These optical films with pressure-sensitive adhesive can be attached to a glass substrate or the like via a pressure-sensitive adhesive layer and incorporated into an image display device or the like. It is preferable that the adhesive layer used for the optical film with an adhesive such as a polarizing plate with an adhesive has sufficient transparency.
Moreover, the polarizing plate used as a base film generally has a three-layer structure sandwiched by triacetyl cellulose-based protective films on both sides of a polyvinyl alcohol-based polarizer.
A polarizing film in which the surface of the protective film is coated with a discotic liquid crystal, or a stretched triacetylcellulose-based film, a stretched polycycloolefin-based film, or a stretched cellulose acetate propionate film instead of a triacetylcellulose-based film It has a structure that is bonded together. Further, these polarizing films are bonded to a glass substrate that is a surface base material of a liquid crystal display panel via an adhesive layer.

  In the present invention, an antistatic agent that is an ionic compound represented by Formula 1 is used as a pressure-sensitive adhesive, so that it can have an antistatic function and can further improve the adhesion to a glass plate. The durability can be improved, and the advantages of both can be utilized at a lower cost than when both the antistatic agent and the silane coupling agent are used together, and the above problems can be improved.

  Hereinafter, the present invention will be specifically described with reference to examples.

<Manufacture of acrylic copolymer>
[Example 1]
Nitrogen gas was introduced into a reactor equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen inlet tube, and the air in the reactor was replaced with nitrogen gas. Thereafter, 100 parts of a solvent (ethyl acetate) was added to the reaction apparatus together with 100 parts by weight of 2-ethylhexyl acrylate and 1.5 parts by weight of 6-hydroxyhexyl acrylate. Thereafter, 0.1 part by weight of azobisisobutyronitrile as a polymerization initiator was added dropwise over 2 hours, reacted at 65 ° C. for 8 hours, and the acrylic copolymer solution 1 of Example 1 having a weight average molecular weight of 500,000 was obtained. Got.
[Examples 2-7 and Comparative Examples 1-2]
The monomer composition is used in Examples 2 to 7 and Comparative Examples 1 and 2 in the same manner as the acrylic copolymer solution 1 used in Example 1 except that the composition of each monomer is as shown in Table 1. An acrylic copolymer solution was obtained.

<Manufacture of an adhesive composition, a surface protective film, and a polarizing plate film>
[Example 1]
1.0 parts by weight of antistatic agent C-1 (see Tables 3 and 4), coronate HX (hexa) with respect to the acrylic copolymer solution 1 (100 parts by weight of the acrylic copolymer) produced as described above. The pressure-sensitive adhesive composition of Example 1 was obtained by adding 1.5 parts by weight of an isocyanurate of a methylene diisocyanate (HDI) compound and stirring and mixing. After applying this adhesive composition on a release film made of a polyethylene terephthalate (PET) film coated with a silicone resin, the solvent is removed by drying at 90 ° C., and the adhesive layer has a thickness of 25 μm A sheet was obtained.
Then, the adhesive sheet was transferred to the opposite side of the antistatic and antifouling surface of the polyethylene terephthalate (PET) film that had been antistatic and antifouling treated on one side. A surface protective film of Example 1 having a laminated structure of “PET film / adhesive layer / release film (silicone resin-coated PET film)” was obtained.
[Examples 2 to 4 and Comparative Examples 1 to 2]
The surface protective films of Examples 2 to 4 and Comparative Examples 1 to 2 were obtained in the same manner as the surface protective film of Example 1 except that the compositions of the additives were as described in Table 1. .
[Examples 5 to 7]
In the same manner as in Example 1 except that the composition of each additive was as shown in Table 1 and the substrate to be transferred was a polarizing plate, “Polarizing plate / adhesive layer / release film (silicone resin)” The polarizing film of Examples 5-7 which has a laminated structure of "Coated PET film)" was obtained.

In Table 1, the compounding ratio of each component is 100 parts by weight of the total of the alkyl acrylate monomers (when the copolymerizable vinyl monomer is used, the total of the alkyl acrylate monomer and the copolymerizable vinyl monomer). Numeric values are shown in parentheses. In addition, Table 2 shows the names of the abbreviations of each component used in Table 1. Table 3 shows the chemical formula of the antistatic agent used in Table 1.
Coronate (registered trademark) HX, HL and L-45 are trade names of Nippon Polyurethane Industry Co., Ltd., and TETRAD (registered trademark) -X is a trade name of Mitsubishi Gas Chemical Co., Ltd. Trademark) 24A-100 is a trade name of Asahi Kasei Chemicals Corporation.

<Test method and evaluation>
The surface protective films of Examples 1 to 4 and Comparative Examples 1 to 2 and the polarizing film of Examples 5 to 7 were aged in an atmosphere of 23 ° C. and 50% RH for 7 days, and then a release film (silicone resin coat). The PET film) was peeled off to expose the pressure-sensitive adhesive layer as a sample for measuring surface resistivity.
Further, the surface protective film and the polarizing plate film on which the pressure-sensitive adhesive layer was exposed were bonded to the surface of the alkali-free glass plate via the pressure-sensitive adhesive layer, and allowed to stand for 1 day. A sample that was autoclaved for 1 minute and allowed to stand at room temperature for 12 hours was used as a sample for measuring the adhesive strength.
Moreover, the surface protective film which exposed this adhesive layer, and the polarizing plate film were bonded together on the surface of the alkali-free glass plate through the adhesive layer, and it was set as the measurement sample of durability and rework property.

<Surface resistivity>
After aging and before bonding to an alkali-free glass plate, peel off the release film (silicone resin-coated PET film) to expose the adhesive layer, and use a resistivity meter Hiresta UP-HT450 (manufactured by Mitsubishi Chemical Analytech). Used to measure the surface resistivity of the pressure-sensitive adhesive layer.

<Durability>
The durability measurement sample obtained above was left in an atmosphere of 60 ° C. and 90% RH for 250 hours and then taken out to room temperature, and peeling from the adherend, foaming and the like were visually confirmed. The evaluation criteria were “◯” when no peeling / foaming was confirmed, “Δ” when slight peeling / foaming was confirmed, and “×” when peeling / foaming was clearly confirmed.

<Reworkability>
The reworkability measurement sample obtained above was left in an atmosphere of 70 ° C. and DRY for 24 hours, then taken out to room temperature, and the adherend when the surface protective film and polarizing plate film were peeled off from the alkali-free glass plate The adhesive residue on the surface was confirmed visually. Evaluation criteria were evaluated as “◯” when no adhesive residue was confirmed, “Δ” when a slight amount of adhesive residue was confirmed, and “X” when the adhesive residue was clearly confirmed.

<Adhesion to glass plate>
The adhesive strength measurement sample obtained above (a 25 mm wide surface protective film and a polarizing plate film bonded to the surface of a non-alkali glass plate) was measured in a 180 ° direction using a tensile tester. The peel strength measured by peeling at a tensile speed of 3 m / min was taken as the adhesive strength.

Table 4 shows the evaluation results. The surface resistivity was expressed by a system in which “m × 10 ^{+ n} ” is “mE + n” (where m is an arbitrary real value and n is a positive integer).

The surface protective films of Examples 1 to 4 and the polarizing films of Examples 5 to 7 had a surface resistivity of 1.0 × 10 ⁺¹² Ω / □ or less, and had appropriate adhesive strength. That is, problems such as defects such as antistatic properties and reworkability on the adherend can be improved.
The surface protective films of Comparative Examples 1 and 2 had a surface resistivity exceeding 1.0 × 10 ⁺¹² Ω / □, and had problems with antistatic properties. Furthermore, the surface protective films of Comparative Examples 1 and 2 have problems in durability and reworkability on the adherend.

Claims (7)

A pressure-sensitive adhesive composition containing a (meth) acrylic polymer, an antistatic agent, and a crosslinking agent,
The antistatic agent contains an ionic compound represented by Formula 1, the ionic compound has an organic cation containing a hydrolyzable silicon-containing group, and the organic cation Z ⁺ is represented by Formula 2. One or two or more types of alkoxysilyl group-containing cations and containing 0.1 to 20 parts by weight of the ionic compound with respect to 100 parts by weight of the (meth) acrylic polymer Composition.

(However, in Formula 1, Z ^<+> shows a cation and X ^{< - >} shows an anion.)

(However, in Equation 2,
R ¹ and R ² represent the same or different alkyl groups from each other;
n represents an integer of 1 to 3,
Q ¹ represents an alkylene group having 1 to 10 carbon atoms,
E represents NH or S;
Q ² represents a single bond or an alkylene group having 1 to 10 carbon atoms,
Q ³ represents an alkylene group having 1 to 10 carbon atoms,
V ⁺ represents a monovalent cation group selected from an ammonium group, a pyridinium group, a pyrrolidinium group, an imidazolium group, a guanidinium group, an isouronium group, a thiouronium group, a piperidinium group, a pyrazolium group, a morpholinium group, a phosphonium group, and a sulfonium group. As shown, the cationic group may be a non-substituted group or may have a substituent. ) The anion X ⁻ of the ionic compound is hexafluorophosphate anion, bis (fluorosulfonyl) imide anion, tris (pentafluoroethyl) trifluorophosphate anion, bis (trifluoromethanesulfonyl) imide anion, thiocyanate anion, alkylbenzene 2. The pressure-sensitive adhesive composition according to claim 1, wherein the pressure-sensitive adhesive composition is one or more selected from an inorganic or organic anion group consisting of a sulfonate anion, a perchlorate anion salt, and a tetrafluoroborate anion. . The (meth) acrylic polymer comprises the following (meth) acrylic polymer (1) or (meth) acrylic polymer (2),
(Meth) acrylic polymer (1); (A) at least one alkyl (meth) acrylate monomer having an alkyl group having C1 to C14, and (B) a copolymerization containing a hydroxyl group and / or a carboxyl group A copolymer obtained by copolymerizing at least one vinyl monomer;
(Meth) acrylic polymer (2); (A) at least one alkyl (meth) acrylate monomer having an alkyl group having C1 to C14 and (B) a hydroxyl group and / or a carboxyl group-containing copolymer A copolymer obtained by copolymerizing at least one vinyl monomer and at least one copolymerizable vinyl monomer (B ′) having a vinyl group as another copolymerizable monomer;
The pressure-sensitive adhesive composition according to claim 1 or 2, wherein the crosslinking agent is a bifunctional or higher functional isocyanate compound or a bifunctional or higher functional epoxy compound.   A pressure-sensitive adhesive film, wherein a pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition according to claim 1 is laminated on one side of a substrate.   A surface protective film in which the pressure-sensitive adhesive film according to claim 4 is used.   The optical film with an adhesive by which the adhesive layer which consists of an adhesive composition in any one of Claims 1-3 is laminated | stacked on the at least one surface of the optical film.   An image display device in which the optical film with a pressure-sensitive adhesive according to claim 6 is bonded via the pressure-sensitive adhesive layer.