WO2004108850A1 - 活性エネルギー線硬化型粘着剤組成物及び粘着シート - Google Patents
活性エネルギー線硬化型粘着剤組成物及び粘着シート Download PDFInfo
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- WO2004108850A1 WO2004108850A1 PCT/JP2004/008049 JP2004008049W WO2004108850A1 WO 2004108850 A1 WO2004108850 A1 WO 2004108850A1 JP 2004008049 W JP2004008049 W JP 2004008049W WO 2004108850 A1 WO2004108850 A1 WO 2004108850A1
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- sensitive adhesive
- pressure
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- maleimide
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/24—Homopolymers or copolymers of amides or imides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
- C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/40—Esters of unsaturated alcohols, e.g. allyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
Definitions
- the present invention relates to an active energy ray-curable pressure-sensitive adhesive composition
- an active energy ray-curable pressure-sensitive adhesive composition comprising a plurality of compounds having two or more maleimide groups having a specific structure, and a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed from the composition. It can be awarded in the technical field used.
- the pressure-sensitive adhesive is used for various applications such as a pressure-sensitive adhesive tape, a pressure-sensitive adhesive label and a double-sided pressure-sensitive adhesive tape after being subjected to pressure-sensitive adhesive processing.
- a pressure-sensitive adhesive tape a pressure-sensitive adhesive label
- a double-sided pressure-sensitive adhesive tape after being subjected to pressure-sensitive adhesive processing.
- excellent water resistance and high adhesiveness that is, low pressure bonding at room temperature is possible. It is required to be able to be peeled off even when left at high temperatures.
- adhesives used in first-aid bonds must be applied directly to the skin. High security is required.
- solvent-based adhesives in which acrylic polymers or rubber resins such as SIS and SEBS are dissolved in organic solvents are used as widely used adhesives, and are excellent in water resistance and adhesive performance. Therefore, various studies have been made to satisfy the above-mentioned performance.
- solvent-based pressure-sensitive adhesives are not recommended because they may affect the environment due to the organic solvent escaping when processing into pressure-sensitive adhesive products and the safety due to the residual solvent in the pressure-sensitive adhesive film. Recently, unused pressure-sensitive adhesives have been required.
- Active energy ray-curable pressure-sensitive adhesives that cure are being studied. Active energy ray-curable compositions such as' active energy linear curing'-type pressure-sensitive adhesives usually do not crosslink and cure with the raw material components alone, so a photopolymerization initiator or photosensitizer (hereinafter collectively referred to as a photosensitizer) (Referred to as a polymerization initiator, etc.).
- a photopolymerization initiator or photosensitizer hereinafter collectively referred to as a photosensitizer
- the photopolymerization initiator As the photopolymerization initiator, a low molecular weight compound is usually used in order to start the polymerization reaction efficiently. However, when irradiating the composition with active energy, the temperature rises due to the heat of polymerization.However, the low molecular weight photopolymerization initiator, etc. has a high vapor pressure, so that a noticeable odor is generated at the time of curing, which causes a problem in the working environment. This has the problem of generating or contaminating the obtained product. In addition, unreacted photopolymerization initiators and other decomposed substances remain in the cured coating film, and when light or heat acts on the cured coating film, the cured coating film turns yellow, There was a problem of generating a bad smell.
- composition containing a compound having a maleimide group disclosed in Patent Documents 1 and 2 when used as an adhesive, it may gel when stored and stored at a high temperature, or a cured coating film may be formed.
- water resistance was poor, that is, when it was immersed in warm water for a long time, the adhesive strength was reduced and peeled off.
- compositions containing the compound having a maleimide group disclosed in Patent Documents 3 and 4 are all adhesives, and the cured coating film has no tackiness or poor tackiness. However, it was difficult to use as an adhesive. Furthermore, the compound having a maleimide group described in Patent Document 4 has crystallinity and a melting point of 40 ° C. or more. Since it was not liquid at room temperature, it was particularly poor in adhesiveness and was difficult to use as an adhesive.
- a cured coating which is liquid at room temperature, has practical crosslinking properties or curability even in the absence of a photopolymerization initiator even when irradiated with visible light or ultraviolet light,
- the film is not colored, is excellent in various adhesive properties, and is also excellent in water resistance and heat resistance.
- An active energy ray-curable adhesive it contains a compound having a specific structure of maleimide group. It has been proposed that an active energy ray-curable pressure-sensitive adhesive is effective (Patent Document 5).
- Patent Document 2 Japanese Patent Application Laid-Open No. H11-124404 (Claims)
- Patent Document 3 Japanese Patent Application Laid-Open No. 2001-210950 (Claims)
- Patent Document 4 Japanese Patent Application Laid-Open No. 2000-222005 (Claims)
- Patent Document 5 Japanese Patent Application No. 200-0 549 83 (Claims)
- the present inventors have conducted various studies to solve the above problems, and as a result, have found that a pressure-sensitive adhesive containing a plurality of types of compounds having two or more maleimide groups having a specific structure can solve the above problems. Completed the invention.
- the pressure-sensitive adhesive composition of the present invention is a composition containing a plurality of types of liquid compounds at room temperature and having two or more maleimide groups, which are represented by the following formula (A):
- a compound having a maleimide group represented by 1) [hereinafter simply referred to as “component (A)”] and (B) a compound having a maleimide group represented by the following formula (2) or / and a compound represented by the following formula (3)
- component (B)) is essential.
- the compound having a maleimide group represented by the following formula (2) is simply referred to as a component (B-1), and the compound having a maleimide group represented by the following formula (3) is simply referred to as (B -2) Ingredients.
- R 1 and R 2 represent an alkyl group, an aryl group, an arylalkyl group or a halogen atom.
- R 3 represents a propylene group or a propylene group which may have a substituent.
- the alkyl group of R 1 and R 2 is preferably a group having 4 or less carbon atoms, particularly preferably a methyl group.
- the aryl group include a phenyl group.
- the arylalkyl group include a benzyl group.
- R 1 and R 2 are preferably an alkyl group, more preferably an alkyl group having 4 or less carbon atoms, and particularly preferably a methyl group.
- the propylene group and the butylene group which may have a substituent of R 3 are preferably a butylene group in that they are easily available and are excellent in various adhesive properties.
- the substituent is preferably an alkyl group, more preferably a methyl group.
- Specific examples of the propylene group or butylene group having a substituent include —CH 2 CH (CH 3 ) CH 2 CH 2 — and the like. Since the component (A) and the component (B) used in the present invention have the maleimide group described above, the maleimide group is dimerized by irradiation with active energy rays, and cross-links the molecules of the compound.
- the maleimide group is cross-linked or cured by ultraviolet light or visible light (hereinafter, these are collectively referred to as “curing”), it is possible to use ultraviolet light with no combination of a photopolymerization initiator or in a small amount.
- a dimerization reaction can be caused by irradiation with visible light.
- the components (A) and (B) in the present invention are liquid at normal temperature. This makes handling such as coating work easier. On the other hand, those that are solid at room temperature are difficult to handle, and the cured coating film has a high modulus of elasticity and poor adhesion performance.
- the normal temperature means 25 ° C.
- the molecular weight of the component (A) and the component (B) is preferably 20,000 to 20,000, more preferably 3,000 to 10,000, and more preferably 30,000 in terms of number average molecular weight. Or 300,000 to 800,000. If the number average molecular weight is less than 2,000, the adhesive strength and tack of the cured coating film may decrease, while if it exceeds 20,000, the viscosity of the composition becomes too high and the coatability decreases. Sometimes.
- the number average molecular weight is a value obtained by converting the molecular weight measured by gel permeation chromatography (hereinafter abbreviated as GPC) using tetrahydrofuran as a solvent with reference to the molecular weight of polystyrene.
- GPC gel permeation chromatography
- component (A) and the component (B) used in the present invention various compounds can be used as long as they have the maleimide group described above.
- component (A) and the component (B) those produced by various methods can be used, but the following three compounds are preferable in terms of easy production.
- Compound II is an addition reaction of a prepolymer having two or more isocyanate groups at the end (hereinafter simply referred to as urethane prepolymer) and a compound having a maleimide group and an active hydrogen group (hereinafter simply referred to as a maleimide active hydrogen compound). It is produced by reacting 2 moles or more of a maleimide active hydrogen compound with 1 mole of urethane prepolymer.
- urethane prepolymer various compounds can be used as long as they have two or more isocyanate groups at the terminal of the molecule.
- Examples of the urethane prepolymer include a reaction product of a polyol having two or more hydroxyl groups (hereinafter simply referred to as a polyol) and a polyisocyanate having two or more isocyanate groups (hereinafter simply referred to as a polyisocyanate). .
- polystyrene resin examples include a polyester polyol, a polyether polyol, and a polymer polyol produced from a radical polymerizable monomer.
- polyester polyols are preferred in that the resulting cured coating film has a low viscosity and the resulting pressure-sensitive adhesive has excellent water resistance and heat resistance in addition to tackiness.
- the polyol two or more kinds can be used in combination as needed.
- Polyester polyol is a random copolymer of a polyhydric carboxylic acid and a polyhydric alcohol. Of these, aliphatic polyester polyols are preferred because of excellent curability of the composition by active energy rays.
- the polyvalent carboxylic acid various compounds can be used as long as they have two or more carboxylic acid groups in the molecule.
- succinic acid, adipic acid, Pimelic acid, Suberic acid, Azelaic acid, Sebacic acid Dodecane diacid, Icoic diacid, 2, 6-Naphthalenedicarboxylic acid, Trimellitic acid, Daltaric acid, 1,9-Nonanedicarboxylic acid, 1,10-Decan Dicarboxylic acid, malonic acid, fumaric acid, 2,2-dimethyldartaric acid, 1,3-cyclopentanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, itaconic acid, Maleic acid, 2,5-norpornanedicarboxylic acid, 1,4-terephthalic acid, 1,3-terephthalic acid, dimer acid, and paraoxybenzoic acid
- aliphatic dicarboxylic acids are preferred, and adipic acid and sepasic acid are more preferred.
- Two or more polycarboxylic acids can be used in combination as needed.
- polyhydric alcohols can be used as long as they have two or more hydroxyl groups in the molecule.
- butylethyl propanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol and polyethylene glycol ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol 1,3-propanediol, 2-butyl-2-ethyl-1,3-butanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediyl All, 1,6-hexanediol, 1,7-heptanediol, 1,2-octanediol, 1,8-octanediol, 1,9 monononanediol, 1,2 decanediol, 1,10
- aliphatic diols are preferable, and butylethyl propanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, dimer acid diol and 2-methyl-1, 8-Octanediol is more preferred because the resulting composition has low viscosity, excellent tackiness and water resistance.
- polyester polyol may be a general esterification reaction, such as a method in which a polycarboxylic acid and a polyhydric alcohol are heated with stirring in the presence of a catalyst.
- a catalyst usually used in an esterification reaction can be used, and examples thereof include a base catalyst, an acid catalyst, and a metal alkoxide.
- the base catalyst include metal hydroxides such as sodium hydroxide and hydroxylating hydride, and amines such as triethylamine, N, N-dimethylpenzylamine and triphenylamine.
- the acid catalyst include sulfuric acid and p-toluenesulfonic acid.
- the metal alkoxide an alkoxide of titanium, tin or zirconium is preferred.
- metal alkoxides include: tetraalkyl titanates such as tetrabutyl titanate; tin alkoxides such as dibutyl tin oxide and monobutyl suloxide; and zirconium tetrabutoxide and zirconia isopropoxide. Zirconium alkoxides.
- the amount of these catalysts used is preferably as small as possible.
- the titanium compound has almost no toxicity shown by heavy metals and can produce a practical high-molecular-weight polyester, so that it can be suitably used for sticking of food-related packaging materials.
- the reaction temperature and time in the esterification reaction may be appropriately set according to the purpose.
- the reaction temperature is preferably from 80 to 220 ° C.
- aliphatic polyester polyol commercially available aliphatic polyester polyols can be used.
- Polyether polyols include polyethylene glycol, polypropylene dalicol, polyalkylene glycols such as polybutylene glycol and polytetramethylene glycol; ethylene glycol, propanediol, propylene glycol, tetramethylene glycol, pentamethylene glycol, hexanediol, X-modified ethylene oxide, modified propylene oxide, modified butylenoxide and tetrahydrofuran of alkylene glycols such as neopentyl glycol, glycerin, trimethylolpropane, pentaerythritol, diglycerin, ditrimethylolpropane and dipentaerythritol; X Copolymer of tylene oxide and propylene oxide, propylene glycol and tet Copolymers of hydrofuran, copolymers of ethylene dalicol and tetrahydrofuran; hydrocarbon-based polyols such
- Examples of the polymer polyol produced from the radically polymerizable monomer include a polymer having a monomer having an unsaturated group and a hydroxyl group as an essential component. More specifically, a radical polymerizable monomer such as hydroxyalkyl (meth) acrylate such as hydroxyethyl (meth) acrylate and hydroxypropyl (methyl) acrylate and other (meth) acrylate is used. Examples thereof include those obtained by polymerization. Examples of the method for producing the polymer polyol include a method in which a radical polymerizable monomer is produced by solution polymerization or high-temperature continuous polymerization.
- Polyisocyanate-Various polyisocyanates can be used as long as they have two or more isocyanate groups in the molecule. Specifically, p-phenylene diisocyanate, 4,4 'diphenyl methane diisocyanate, tolylene diisocyanate, 4,4' diphenylene diisocyanate, 1,5- Cutylene diisocyanate, trimethylene diisocyanate, tetramethylene diine cyanate, hexamethylene Rangeisocyanate, pentamethylene diisocyanate, 1,3-cyclopentanedisocyanate, 1,4-cyclohexanediisocyanate, 4,4'-methylenpis (hexylhexyl isocyanate), Methyl 2,4-cyclohexanediisocyanate, Methyl 2,6-cyclohexanediisocyanate, diphenylmethane diisocyanate, 1,4-bis (isocyan)
- alicyclic or aliphatic isocyanates are preferred in that they are excellent in curability by the active energy of the composition and weather resistance of the cured product.
- alicyclic or aliphatic isocyanate hexamethylene diisocyanate and isophorone diisocyanate are preferred.
- Two or more kinds of polyisocyanates can be used in combination as needed.
- the amount of the polyisocyanate to the polyol at the time of producing the urethane prepolymer is preferably in a range such that the equivalent ratio of group-NCOZ group-OH is 1-3, more preferably 1.8-3. Yes, particularly preferably 2 to 2.5.
- urethane prepolymer may be carried out according to a conventional method. For example, there is a method of heating a polyol and a polyisocyanate in the presence of a catalyst.
- a catalyst used in a general urethane reaction can be used, and examples thereof include a metal compound and an amine.
- the metal compound include tin catalysts such as dibutyltin laurate and tin octylate; lead catalysts such as lead octylate; K-KAT XC-4025, K—KAT XC-6212 (KING INDUSTRIES, INC.); Aluminum catalysts such as K-KA TXC-5217 (KING INDUSTRIES, INC); and titanate catalysts such as tetra-2-ethylhexyl titanate.
- amine examples include triethylamine, N, N-dimethylpenzylamine, triphenylamine, triethylenediamine, and the like.
- a general radical polymerization inhibitor such as hydroquinone and triethylamine can be used as needed for the purpose of preventing gelation during the reaction.
- a phosphorus compound can be blended in the production of urethane prepolymer.
- the action of the catalyst used in the esterification and the ring-opening polyaddition can be stopped by blending the phosphorus compound. If the activity of the catalyst is not deactivated, the obtained urethane prepolymer may be stored in the presence of water or heated in the presence of water in the next reaction, or the resulting maleimide compound and the pressure-sensitive adhesive composition may not be used. When the cured product is stored in the presence of moisture, a transesterification reaction may occur, and the physical properties of the pressure-sensitive adhesive composition may be significantly reduced.
- Examples of the phosphorus compound include inorganic or organic phosphorus compounds described in the following (a) to (e).
- alkyl phosphate examples include trialkyl esters such as trimethyl phosphate, triethyl phosphate, tributyl phosphate, trinonyl phosphate, and triphenyl phosphate.
- triphenyl phosphite examples thereof include dibutyl hydrogen phosphite and triphenyl phosphite.
- triphenyl phosphite may reduce the characteristics of the polyester skeleton in the maleimide compound, and it is necessary to pay attention to the amount of triphenyl phosphite added.
- the amount of the phosphorus compound to be used may be appropriately set according to the molecular weight (phosphorus atom content) of the phosphorus compound. Generally, the amount of the phosphorus compound is based on 100 parts by mass of the polyester polyol. The amount is preferably from 0.01 to 3 parts by mass, more preferably from 0.01 to 1 part by mass. If the amount of the phosphorus compound is less than 0.01 parts by mass, the effect of the addition is not recognized, and if the amount is more than 3 parts by mass, the effect does not increase.
- maleimide active hydrogen compound an alcohol having a maleimide group (hereinafter referred to as maleimide alcohol) is preferable.
- maleimide alcohol examples include maleimide alkyl alcohols represented by the following formulas (4-1) to (4-3).
- R 4 represents an alkylene group, and is preferably a linear or branched alkylene group having 1 to 6 carbon atoms.
- R 1 and R 2 are the same groups as described above, and in (4-3), R 3 is the same group as described above.
- a maleimide compound having a polyester skeleton and manufactured using a urethane prepolymer made from a polyester polyol is used. It is preferable because it has excellent curability by reactive energy rays and excellent water resistance of the cured coating film.
- a urethane prepolymer and a maleimide active hydrogen compound may be produced according to a general urethanization reaction.
- Specific examples of the urethanization reaction include the same method as described above.
- the reaction is preferably carried out in the presence of an antioxidant in order to prevent discoloration of the obtained maleimide compound.
- antioxidants examples include phenol-based, phosphite-triester-based, and amine-based antioxidants which are generally used.
- examples of the compounds include compounds described in JP-A-2004-41, JP-B-36-2004 and JP-B-36-20443.
- phenolic antioxidants such as butylhydroxytoluene, pentaerythrityl.tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-1- (3,5-Di-t-butyl-4-hydroxyphenyl) propionate and the like are particularly preferred.
- the phenolic antioxidant can be used in combination with an acid value zinc to enhance its effect.
- the mixing ratio of the antioxidant is preferably 0.01 to 2 parts by mass per 100 parts by mass of the urethane prepolymer. If this proportion is less than 0.01 parts by mass, the effect of the addition of the antioxidant may not be sufficient, and if it is more than 2 parts by mass, no further effect is expected, and cost is reduced. Disadvantaged.
- the above-mentioned phosphorus compound may be blended.
- Compound II is an esterification product of a prepolymer having two or more lipoxyl groups at the end (hereinafter simply referred to as lipoic acid prepolymer) and a maleimide active hydrogen compound.
- Examples of the sulfonic acid prepolymer include those produced using the same polyhydric carboxylic acid and polyhydric alcohol as described above, and have a polyester skeleton. Are preferred.
- the maleimide active hydrogen compound the same compounds as described above can be mentioned.
- esterification reaction between the carboxylic acid prepolymer and the maleimide active hydrogen compound may be carried out in the same manner as described above.
- Compound 2 can be preferably used when a lower viscosity is required as the maleimide compound.
- Compound (3) is an esterification reaction product from a prepolymer having two or more hydroxyl groups at the end (hereinafter simply referred to as a polyol prepolymer) and a carboxylic acid having a maleimide group (hereinafter referred to as a maleimide carboxylic acid).
- Examples of the polyol prepolymer include those similar to the polyester polyol described above, and those having a polyester skeleton are preferable.
- R 5 represents an alkylene group, and is preferably a linear or branched alkylene group having 1 to 6 carbon atoms.
- R 1 and R 2 are the same groups as described above, and in Formula (5-3), R 3 is the same group as described above.
- the esterification reaction between the polyol prepolymer and the maleimide carboxylic acid may be performed in the same manner as described above.
- Compound (3) can be preferably used when a lower viscosity maleimide compound is required.
- compound (2) is preferable in that it has a higher reaction rate than compounds (2) and (3), a higher yield, and can be easily produced.
- compounds (2) and (3) are preferred.
- the maleimide compound can adjust the viscosity and fluidity, and the adhesive strength, holding power and tack of the cured coating film.
- maleimide compound used in the present invention various compounds can be used as long as they have the maleimide group, but a compound having a polyester skeleton is preferable because of its excellent adhesive strength.
- composition of the present invention essentially comprises the components (A) and (B).
- the component (A) is 20 to 40 parts by mass with respect to 100 parts by mass of the total amount of the component (A) and the component (B).
- the component is preferably from 80 to 60 parts by mass, and more preferably the component (A) is from 25 to 35 parts by mass and the component (B) is from 75 to 65 parts by mass. If the proportion of the component (A) is less than 20 parts by mass, the curability of the composition may decrease, or the cohesive force of the cured coating film may decrease. On the other hand, when the proportion of the component (A) exceeds 40 parts by mass, The tackiness and water resistance of the cured coating may decrease.
- component (B-1) and component (B-2) are used together as component (B), the total amount of component (B-1) and component (B-2) is 100 parts by mass,
- the component (B-1) is preferably from 10 to 90 parts by mass, and the component (B-2) is preferably from 90 to 10 parts by mass.
- the composition of the present invention is easily cured by an active energy ray, and even when cured by ultraviolet light or visible light, no photopolymerization initiator is added or a small amount of a photopolymerization initiator is used.
- the composition has excellent curability, but a photopolymerization initiator and the like can be blended if necessary.
- benzoin and its alkyl ethers When a photopolymerization initiator is blended, benzoin and its alkyl ethers, acetophenones, anthraquinones, thioxanthones, ketals, benzophenones, xanthones, and acylphosphine are used as photopolymerization initiators. And ⁇ -diketones.
- a photosensitizer can be used in combination in order to improve the sensitivity by active energy rays.
- the photosensitizer examples include benzoic acid and amine photosensitizers. These can be used in combination of two or more. The mixing ratio of these is preferably from 0.01 to 10 parts by mass based on 100 parts by mass of the maleimide compound.
- those of benzophenones and thioxanthones are preferable because they have a high effect of improving the curing speed of the composition.
- composition of the present invention has a reactive unsaturated group such as a (meth) acrylic monomer and a (meth) acrylic oligomer in order to enhance the adhesion performance of the cured coating film or to adjust the sensitivity of the composition.
- a reactive unsaturated group such as a (meth) acrylic monomer and a (meth) acrylic oligomer in order to enhance the adhesion performance of the cured coating film or to adjust the sensitivity of the composition.
- Compounds may be blended.
- (meth) acrylic monomers examples include alkyl acrylate or alkyl methacrylate (hereinafter, acrylate or methacrylate is referred to as (meth) acrylate), hydroxyalkyl (meth) acrylate, and phenol alkylene oxide.
- (meth) acrylates of side adducts examples include (meth) acrylates of side adducts, mono- or di (meth) acrylates of glycols, polyol poly (meth) acrylates, and poly (meth) acrylates of polyol alkylene oxide adducts.
- (Meth) acrylic oligomers include urethane (meth) acrylate oligomers, polyester (meth) acrylate oligomers, and epoxy (meth) acrylate oligomers.
- the compounding ratio of the compound having a reactive unsaturated group is preferably 50 parts by mass or less, more preferably 20 parts by mass or less, based on 100 parts by mass of the maleimide compound.
- a polymer may be added to the composition of the present invention in order to adjust the viscosity before curing or the adhesive performance after curing.
- the polymer include, but are not particularly limited to, (meth) acrylate polymers, polystyrene, polyolefin, and the like.
- a (meth) acrylate polymer having a maleimide group is preferable because it crosslinks with the maleimide compound of the present invention during curing for the purpose of increasing the water resistance and heat resistance of the composition.
- a compound having one maleimide group can be used in combination as long as the curability by active energy irradiation and the performance of the cured coating film are not impaired.
- the compound include a compound having one maleimide group in a skeleton similar to the above, and a compound having a maleimide group and an ethylenically unsaturated group.
- the maleimide compound of the present invention uses a polymer polyol produced from the above-described radically polymerizable monomer as a raw material, the polymer polyol has two or more hydroxyl groups in one molecule and one in one molecule. In some cases, a mixture with one having one hydroxyl group in one molecule may be used. In this case, the compound obtained is a mixture of a compound having two or more maleimide groups and a compound having one maleimide group, which can be used as it is.
- the compounding ratio of the compound having one maleimide group is preferably 80 parts by mass or less, more preferably 50 parts by mass, based on 100 parts by mass of the total of components (A) and (B). Not more than parts by weight.
- a compound having a maleimide group other than the maleimide group can be used in combination as long as the curability by active energy irradiation and the performance of the cured coating film are not impaired.
- the compound having a maleimide group include a compound having a maleimide group represented by the following formula (6) and the like and having a skeleton similar to the above, and a maleimide represented by the formula (6) and the like. Examples thereof include compounds having an imido group and an ethylenically unsaturated group.
- the mixing ratio of these maleimide compounds is preferably at most 150 parts by mass, more preferably at most 50 parts by mass, based on 100 parts by mass of the total of components (A) and (B).
- R 6 is an alkyl group having 4 or less carbon atoms.
- a tackifier may be added in order to lower the glass transition temperature (hereinafter abbreviated as Tg) of the cured coating film or to enhance the adhesive performance.
- tackifiers can be used, and examples thereof include natural resins such as rosin-based resins and terpene-based resins and derivatives thereof, and synthetic resins such as petroleum resins. Among these, those having no double bond or having a small ratio of double bond are preferred because they hardly inhibit curing of the composition due to active energy rays.
- the mixing ratio of the tackifier is preferably 20 parts by mass or less, more preferably 10 parts by mass or less, with respect to 100 parts by mass of the maleimide compound. If the compounding amount of the tackifier exceeds 20 parts, the viscosity of the composition becomes too high, so that the coatability may be lowered or the heat resistance may be lowered.
- cross-linking between polymer molecules is performed.
- a crosslinking agent which reacts promptly at room temperature may be added and used.
- the cross-linking agent include a polyvalent isocyanate compound, a polyoxazoline compound, an epoxy resin, an azidiline compound, a polycarposaimide compound, and a force coupling agent.
- polyester is used as a raw material as the maleimide compound, it is preferable to add an acid masking agent to the composition.
- ester bonds that are abundantly present in a composition are used for a long period of time under severe conditions such as high temperature and high humidity, not only the ester bonds are hydrolyzed by moisture to reduce the molecular weight, The acidic lipoxyl group generated by the hydrolysis further promotes the hydrolysis of the ester bond, so that the adhesive strength is reduced. Furthermore, when the adhesive product is peeled off due to the reduced adhesive strength, it is known that the pressure-sensitive adhesive layer has a problem of cohesive failure and adhesive residue is left on the product after peeling.
- Examples of the acid masking agent include a carbodiimide compound, an oxazoline compound, and an epoxy compound.
- the mixing ratio of the acid masking agent is preferably 0.1 to 2 parts by mass per 100 parts by mass of the maleimide compound. If the ratio is less than 0.1 part by mass, the effect of the acid masking agent may not be sufficiently exhibited, and if the ratio is more than 2 parts by mass, no further effect is expected, and cost is reduced. In addition, they may exhibit a plasticizing effect and reduce the adhesive performance of the cured product.
- composition of the present invention may contain an ultraviolet absorber and a light stabilizer for improving light resistance.
- Examples of the ultraviolet absorber include benzotriazole-based ultraviolet absorbers, and include 2- (5-methyl-12-hydroxyphenyl) benzotriazole and 2- (3,5-di-t-amyl-2-hydroxyphenyl). ) Benzotriazole and the like.
- Examples of the light stabilizer include a hindered amine light stabilizer and a benzoate light stabilizer. Bis (1,2,2,6,6-pentapentamethyl-4-piberidinyl) separate and 2- (3,5-di-t_butyl-4-hydroxybenzyl) —2-n-butyl hindered amine light stabilizers Bis (1,2,2,6,6-pentamethyl-4-piperidyl) malonate and the like.
- Examples of the benzoate-based light stabilizer include 2,4-di-t-butylphenyl_3,5-di-t-butyl-4-hydroxybenzoate and the like.
- a filler may be added to the composition of the present invention in order to enhance coloring and adhesion performance.
- Specific examples of the filler include various silicas, dyes, calcium carbonate, magnesium carbonate, titanium oxide, iron oxide, and glass fibers.
- a radical polymerization inhibitor such as hydroquinone and hydroquinone monomethyl ether may be blended depending on the use.
- Common additives used in adhesives and pressure-sensitive adhesives, such as dispersion stabilizers, hydrophilic resins, latexes, wetting agents, and leveling improvers, can be used together in commonly used proportions.
- water and oily components can be added for the purpose of adjusting the adhesiveness to the skin.
- oily component include fatty acids such as myristic acid, palmitic acid, stearic acid, lauric acid, and oleic acid, and esters thereof, and glycols.
- a medicinal component may be incorporated, and examples thereof include anti-inflammatory agents such as salicylic acid, indomethacin and ketoprofen, nitroglycerin, and nicotine.
- an organic solvent can be blended if necessary. Further, the above-mentioned phosphorus compound and antioxidant can be blended.
- composition of the present invention can be used for various applications, and is usually used in the form of a pressure-sensitive adhesive sheet.
- the adhesive sheet may be manufactured according to a conventional method.
- Preferred methods include, for example, for example, a method of applying the composition of the present invention to a material and irradiating the coating film with an active energy ray to cure the coating material may be used.
- Examples of the substrate include metal, plastic, glass, ceramics, wood, paper, printing paper, and fiber.
- Examples of the metal include aluminum, iron, and copper.
- Examples of the plastic include vinyl chloride polymer, acrylate polymer, polyacrylonitrile, ponate, polyethylene terephthalate, acrylonitrile butadiene styrene copolymer, polyethylene, and polypropylene. And the like.
- Examples of the method for applying the composition include roll coating, gravure printing, screen printing, die coating, and knife coating.
- the coating amount of the composition to the substrate may be appropriately selected depending on the intended use, the preferred coating weight is 5 ⁇ 2 0 0 g / m 2 , Yori preferably 1 0-1 0 0, which is the ⁇ m 2. If it is less than 5 g / m 2 , the adhesive strength may be insufficient. If it is more than 200 g, the desired performance may not be obtained because the active energy ray is difficult to reach a deep part.
- irradiation with active energy rays is performed to crosslink the maleimide groups of the maleimide compound to increase the molecular weight, thereby improving the cohesive strength and adhesive force of the obtained cured coating film.
- the method of irradiating the active energy ray may be in accordance with a method conventionally used for an active energy ray-curable pressure-sensitive adhesive composition.
- the active energy ray include visible light rays, ultraviolet rays, X-rays, and electron beams. It is preferable to use ultraviolet rays because an inexpensive device can be used. Ultraviolet, high, medium or low pressure mercury lamps, metal halide lamps, xenon lamps, electrodeless discharge lamps, power-on-arc lamps, etc. can be used as the light source when using ultraviolet light. good.
- the Tg of the cured coating film of the composition of the present invention is preferably 11 ° C. or less, more preferably 130 ° C. or less. In the present invention, T g means the peak temperature of ta ⁇ ⁇ obtained by measuring the temperature dependency using a dynamic viscoelasticity measuring device.
- the pressure-sensitive adhesive composition of the present invention can be used for various uses.
- it is a pressure-sensitive adhesive product such as a pressure-sensitive adhesive tape, a pressure-sensitive adhesive label, and a pressure-sensitive adhesive sheet.
- the pressure-sensitive adhesive product include a pressure-sensitive adhesive sheet for confidential postcards, a pressure-sensitive adhesive sheet for wallpaper, a double-sided tape, a seal, a sticker, and a masking film.
- the pressure-sensitive adhesive cured coating film of the present invention has excellent water resistance, and is therefore particularly required for applications requiring water resistance, specifically, for sealing canned beverage containers, and for outdoor signboards and automobile stickers. It is useful for the production of pressure-sensitive adhesives.
- the pressure-sensitive adhesive composition of the present invention has high safety and can be preferably used as a pressure-sensitive adhesive used for a tape or the like which is directly attached to the skin.
- first-aid ties, magnetic ties, surgical tape used to secure gauze and catheters to the body, and covering the wounds one by one to prevent external infections, relieve pain and moisten the wounds Accelerated wound dressing (dressing material) used for healing, protection of joints and muscles for sports tebbing to protect and strengthen injured parts of the joints and muscles through exercise prevention, first aid treatment and relapse prevention (rehabilitation)
- Tapes and tape preparations used in transdermal therapeutic systems in which drugs are absorbed from the skin and guided into the body are included.
- the active energy ray-curable pressure-sensitive adhesive composition of the present invention since it is liquid at ordinary temperature, it is easy to handle and has excellent coatability. Moreover, even when irradiated with visible light or ultraviolet light, it has a practically crosslinkable or curable property in the absence of a photopolymerization initiator, so that it has low odor and toxicity and is safe. Furthermore, the obtained cured coating film has excellent adhesive performance, particularly excellent constant load holding power, and excellent water resistance and heat resistance.
- parts means parts by mass.
- a polyester polyol Kuraray polyol P-5500 [1,3-methyl-11,5-pentaneddiol and a polyester which is a reaction product of sebacic acid 300 g of a diol, a number average molecular weight of 500, a hydroxyl value of 22.7 (mg KOH / g), and Kuraray Co., Ltd.) were charged, and the temperature was increased to 120 ° C with stirring. It dehydrated under reduced pressure for 1 hour.
- IPDI isophorone diisocyanate
- DBTL di-n-butyltin dilaurate
- 2-hydroxyethyl maleimide [a compound represented by the following formula (7). Hereafter called M T—ETA. 5.64 g, 2-hydroxyethyltetrahydrophthalimide [Compound represented by the following formula (8). (Hereinafter referred to as HT-ETA), and reacted for 2 hours to obtain a maleimide compound.
- composition containing the components (A) and (B) at a ratio of 30:70 (mass ratio) was obtained.
- This composition had a viscosity at 25 ° C. of 750,000 mpa ⁇ S and a number average molecular weight of about 600.
- An adhesive is applied to the surface of the polyester film with a thickness of 50 m, which is the base sheet, so that the thickness becomes 45 tm, and 8 OWZ cm condensing high-pressure mercury lamp ( Ultraviolet light was irradiated through 5 passes at a conveyor speed of 10 m / min under one light and a height of 10 cm). Cut this into 200 mm in the length direction and 25 mm in the width direction And
- JISZ-0 2 37 a 25 mm long test piece was stuck on a SUS plate in the same manner as 1, and after standing for 30 minutes, 100 g of the test piece was placed on the end of the test piece at 80 ° C. With the weight of the load applied, the drop time until 24 hours later or the distance deviated when held was measured to evaluate the heat resistance.
- the measurement was performed in an atmosphere of 23% and 65% RH in accordance with the ball rolling method of JISZ—0237.
- the specimen was stuck and left for 1 day under the same conditions as in 1 above, the specimen was further immersed in distilled water at 80 ° C for 1 day, taken out, returned to 23 ° C and 65% RH again, and The adhesive strength was measured in the same manner. The resulting adhesive strength was compared with the rate of decrease in the adhesive strength of 1, and evaluated in the following three grades.
- ⁇ Decrease in adhesive strength is less than 20% ⁇ : Decrease in adhesive strength is 20% or more, less than 50%, X: Decrease in adhesive strength is 50% or more
- Example 1 a reaction was carried out in the same manner as in Example 1, except that only 18.79 g of MT-ETA was used, to obtain a maleimide compound as the component (A).
- the viscosity of this compound at 25 ° C was 600,000 mPa ⁇ S, and the number average molecular weight was about 600,000. This compound is called A1.
- Example 1 a reaction was carried out in the same manner as in Example 2 except that only 24.8 g of 11 to £ 8 was used to obtain a maleimide compound of the present invention as the component (B).
- the viscosity of this compound at 25 ° C was 900,000 mPa ⁇ S, and the number average molecular weight was about 600,000. This compound is called B1.
- Example 1 instead of MT-ETA and HT-ETA, only hydroxyethyl-12'3-dimethylmaleide [compound represented by the following formula (9), hereinafter referred to as DM-ETA] was used.
- DM-ETA hydroxyethyl-12'3-dimethylmaleide
- the reaction was carried out in the same manner as in Example 1 except for using 50 g, to obtain a maleimide compound as the component (B).
- This compound had a viscosity at 25 ° C of 820,000 mPa ⁇ S and a number average molecular weight of about 600. This compound is called B2.
- composition of the present invention can be used for various adhesive applications as an active energy ray-curable adhesive composition.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Adhesive Tapes (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005506827A JP4259524B2 (ja) | 2003-06-05 | 2004-06-03 | 活性エネルギー線硬化型粘着剤組成物及び粘着シート |
US10/559,449 US20060182956A1 (en) | 2003-06-05 | 2004-06-03 | Radiation-curable pressure-sensitive adhesive composition and pressure-sensitive adhesive sheets |
EP04735999A EP1634935A4 (en) | 2003-06-05 | 2004-06-03 | RADIATION-CURABLE SELF-ADHESIVE COMPOSITION AND SELF-ADHESIVE SHEETS |
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JP2003161350 | 2003-06-05 | ||
JP2003/161350 | 2003-06-05 |
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WO2004108850A1 true WO2004108850A1 (ja) | 2004-12-16 |
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PCT/JP2004/008049 WO2004108850A1 (ja) | 2003-06-05 | 2004-06-03 | 活性エネルギー線硬化型粘着剤組成物及び粘着シート |
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US (1) | US20060182956A1 (ja) |
EP (1) | EP1634935A4 (ja) |
JP (1) | JP4259524B2 (ja) |
KR (1) | KR20060004706A (ja) |
CN (1) | CN1798815A (ja) |
WO (1) | WO2004108850A1 (ja) |
Cited By (1)
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JP2008214534A (ja) * | 2007-03-06 | 2008-09-18 | Toagosei Co Ltd | 活性エネルギー線硬化型粘着剤組成物および粘着シート |
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US20070004896A1 (en) * | 2003-08-27 | 2007-01-04 | Taogosei Co., Ltd. | Active energy radiation hardenable skin plaster composition and skin plaster |
JP4577094B2 (ja) * | 2005-06-02 | 2010-11-10 | 東亞合成株式会社 | 活性エネルギー線硬化型粘着剤組成物 |
EP2146312A4 (en) * | 2007-04-26 | 2012-04-04 | Logalty Servicios De Tercero De Confianza S L | METHOD AND SYSTEM FOR NOTARIZING ELECTRONIC TRANSACTIONS |
US20080299489A1 (en) * | 2007-06-04 | 2008-12-04 | Byers Gary W | Ultraviolet curable coating fluid for printing systems |
KR101023843B1 (ko) * | 2008-01-11 | 2011-03-22 | 주식회사 엘지화학 | 점착제 조성물, 상기를 포함하는 편광판 및 액정표시장치 |
GB201114991D0 (en) * | 2011-08-30 | 2011-10-12 | Cerium Group Ltd | A composite protective sheet material |
US9884981B2 (en) * | 2014-02-21 | 2018-02-06 | IFS Industries Inc. | Polyol compositions for hot melt adhesives |
CN110998953B (zh) * | 2017-07-21 | 2023-06-23 | 富士胶片株式会社 | 固体电解质组合物、含固体电解质的片材及全固态二次电池、以及含固体电解质的片材及全固态二次电池的制造方法 |
CN113211700A (zh) * | 2021-03-22 | 2021-08-06 | 鞍钢冷轧钢板(莆田)有限公司 | 一种含双光敏树脂骨架的耐指纹液成膜方法 |
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- 2004-06-03 JP JP2005506827A patent/JP4259524B2/ja not_active Expired - Fee Related
- 2004-06-03 KR KR1020057023280A patent/KR20060004706A/ko not_active Application Discontinuation
- 2004-06-03 CN CNA2004800155473A patent/CN1798815A/zh active Pending
- 2004-06-03 EP EP04735999A patent/EP1634935A4/en not_active Withdrawn
- 2004-06-03 WO PCT/JP2004/008049 patent/WO2004108850A1/ja active Application Filing
- 2004-06-03 US US10/559,449 patent/US20060182956A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
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KR20060004706A (ko) | 2006-01-12 |
EP1634935A1 (en) | 2006-03-15 |
JP4259524B2 (ja) | 2009-04-30 |
JPWO2004108850A1 (ja) | 2006-07-20 |
EP1634935A4 (en) | 2007-09-19 |
CN1798815A (zh) | 2006-07-05 |
US20060182956A1 (en) | 2006-08-17 |
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