Adhesive set, adhesive body and manufacturing method thereof

Abstract

An adhesive kit is disclosed. The adhesive kit comprises: a main agent containing a complex breaking agent; and an initiator containing an organoborane complex and N, N-disubstituted (meth) acrylamide. At least one of the main agent and the initiator further contains a compound having a radically polymerizable group. The main agent and / or the initiator further contains at least one compound selected from the group consisting of a metal halide salt and a compound having a thiocarbonyl sulfide structure.

Description

Technical Field

[0001] The invention relates to an adhesive kit, an adhesive body and a manufacturing method thereof. Background Art

[0002] As an adhesive for bonding plastics such as polyethylene and polypropylene, an adhesive composition containing an organic borane complex is disclosed (for example, Patent Document 1). The organic borane complex is decomplexed by mixing with a complex breaker to give an organic borane. The organic borane acts as an initiator that generates free radicals by reacting with oxygen. The boric acid radicals generated here play a role in suppressing the chain transfer or stopping reaction of a compound having a free radical polymerizable group while maintaining the generation of dormant species of atom transfer radical polymerization (ATRP) including a growth reaction of surface grafting.

[0003] Previous technical literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application No. 2005-514489 Summary of the invention

[0006] Technical issues to be solved by the invention

[0007] However, in such adhesive compositions, from the viewpoint of process suitability (operability), it is required to show sufficient bonding strength in a short time (e.g., about 5 hours). However, in conventional adhesive compositions containing organic borane complexes, the time until sufficient bonding strength is shown is long, and there is still room for improvement.

[0008] Therefore, a main object of the present invention is to provide an adhesive kit capable of preparing an adhesive composition that exhibits sufficient adhesive strength in a short time.

[0009] Means for solving technical problems

[0010] The inventors of the present invention have studied to solve the above problems and have found that an adhesive composition can develop sufficient adhesive strength in a short time by using N,N-disubstituted (meth)acrylamide, thereby completing the present invention.

[0011] That is, the present invention provides an adhesive set of the following [1] to [4], an adhesive body of the following [5], and a method for manufacturing an adhesive body of the following [6].

[0012] [1] An adhesive kit comprising: a main agent containing a complex breaker; and an initiator containing an organic borane complex and N,N-disubstituted (methyl)acrylamide, wherein at least one of the main agent and the initiator further contains a compound having a free radical polymerizable group, and at least one of the main agent and the initiator further contains at least one selected from the group consisting of a halogenated metal salt and a compound having a thiocarbonylthio structure.

[0013] [2] The adhesive set according to [1], wherein the N,N-disubstituted (meth)acrylamide is a compound represented by the following formula (1).

[0014]

[0015] In formula (1), R 1 represents a hydrogen atom or a methyl group. 2 and R 3 Each independently represents an alkyl group, R 2 and R 3 They may be bonded to each other or to each other through an oxygen atom to form a ring together with the nitrogen atom to which they are bonded.

[0016] [3] The adhesive set according to [1] or [2], wherein the N,N-disubstituted (meth)acrylamide is a compound represented by the following formula (2).

[0017]

[0018] In formula (2), R 4 represents a hydrogen atom or a methyl group, R 5 and R 6 Each independently represents an alkylene group.

[0019] [4] The adhesive set according to any one of [1] to [3], wherein the main agent further contains a compound having a radical polymerizable group.

[0020] [5] An adhesive body comprising: a first adherend; a second adherend; and an adhesive layer for bonding the first adherend and the second adherend to each other, wherein the adhesive layer contains a cured product of an adhesive composition, wherein the adhesive composition includes the main agent and the initiator in the adhesive kit described in any one of [1] to [4].

[0021] [6] A method for producing an adhesive body, which is the method for producing an adhesive body according to [5], comprising: a step of bonding the first adherend and the second adherend together via an adhesive composition containing the main agent and the initiator.

[0022] According to the adhesive set, an adhesive composition that exhibits sufficient adhesive strength in a short time can be prepared. Although the reason for the exhibiting of such an effect is not clear, the inventors of the present invention speculate as follows: for example, the p orbital of the organoborane of the organoborane complex and the N,N-disubstituted (meth)acrylamide exert a moderate interaction, and the metal of the halogenated metal salt and the N,N-disubstituted (meth)acrylamide are complexed and stabilized to improve the sustainability of the growth reaction of the compound having a free radical polymerizable group.

[0023] Effects of the Invention

[0024] According to the present invention, there is provided an adhesive kit capable of preparing an adhesive composition that exhibits sufficient adhesive strength in a short time. Also, according to the present invention, there is provided an adhesive body using such an adhesive kit and a method for producing the same. DETAILED DESCRIPTION

[0025] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments.

[0026] The same is true for the numerical value and range thereof of the present invention, and the present invention is not limited thereto. In this specification, the numerical range represented by "~" represents the range in which the numerical values ​​before and after "~" are respectively included as the minimum value and the maximum value. In the numerical range recorded in stages in this specification, the upper limit or lower limit recorded in a numerical range may also be replaced by the upper limit or lower limit of other numerical ranges recorded in stages. Moreover, in the numerical range recorded in this specification, the upper limit or lower limit of the numerical range may also be replaced by the value shown in the embodiment.

[0027] In this specification, (meth)acrylamide means acrylamide or its corresponding methacrylamide. (Meth)acrylate means acrylate or its corresponding methacrylate. Other similar expressions such as (meth)acryloyl and (meth)acrylic copolymers are also the same. In addition, the materials exemplified below may be used alone or in combination of two or more unless otherwise specified. In the case where there are multiple substances equivalent to each component in the composition, the content of each component in the composition represents the total amount of the multiple substances present in the composition unless otherwise specified.

[0028] [Adhesive Set]

[0029] An adhesive set according to one embodiment includes: a main agent including a complex breaker; and an initiator including an organic borane complex and N,N-disubstituted (meth)acrylamide. The adhesive set according to this embodiment can obtain an adhesive composition including the main agent and the initiator by mixing the main agent and the initiator.

[0030] The main agent contains a complex breaker. The initiator contains an organic borane complex and N,N-disubstituted (methyl) acrylamide. At least one of the main agent and the initiator further contains a compound having a free radical polymerizable group. At least one of the main agent and the initiator further contains at least one selected from the group consisting of a halogenated metal salt and a compound having a thiocarbonylsulfide structure. At least one of the main agent and the initiator may further contain any one of a filler, a plasticizer, etc. The following describes each component.

[0031] (Organoborane complex)

[0032] The initiator contains an organic borane complex. The organic borane complex refers to an organic borane-Lewis base complex that is complexed by coordinating a Lewis base to an organic borane. The organic borane-Lewis base complex is a compound that reacts with a complex breaker described later to give an organic borane. The organic borane undergoes free radical splitting in the presence of oxygen and generates boric acid free radicals, etc., so that it can act as an initiator for active free radical polymerization. The organic borane can be, for example, an alkyl borane (BR3, R: alkyl). The Lewis base can be, for example, an amine. The amine can be, for example, a compound having multiple amino groups, or a compound having at least an amino group constituting an amine and a group (for example, an alkoxy group, etc.) containing an atom (for example, an oxygen atom, etc.) that can coordinate with boron, in addition to the nitrogen atom of the amino group. Because these compounds act as polydental ligands relative to the organic borane, they can be called polydental amines.

[0033] The organic borane complex can be an alkyl borane-amine complex or an alkyl borane-polyamine complex. As an organic borane complex, for example, triethyl borane-1,3-diaminopropane complex, triethyl borane-diethylenetriamine complex, tri-n-butyl borane-3-methoxy-1-propylamine complex, tri-n-butyl borane-1,3-diaminopropane complex, triisobutyl borane-1,3-diaminopropane complex, triethyl borane-1,6-diaminohexane complex, triisobutyl borane-1,3-diaminopropane complex, triisobutyl borane-1,6-diaminohexane complex. These can be used alone or in combination of more than two. Among these, the organic borane complex can be triethyl borane-1,3-diaminopropane complex or tri-n-butyl borane-3-methoxy-1-propylamine complex. As the organoborane complex, a commercially available product may be used, or a synthetic product may be used.

[0034] From the viewpoint of developing adhesive strength, the content of the organoborane complex may be 0.1 mass % or more, 1 mass % or more, 3 mass % or more, or 5 mass % or more based on the total amount of the initiator. From the viewpoint of storage stability, the content of the organoborane complex may be 30 mass % or less, 20 mass % or less, 15 mass % or less, or 10 mass % or less based on the total amount of the initiator.

[0035] From the viewpoint of developing adhesive strength, the content of the organic borane complex may be 0.01 mass % or more, 0.05 mass % or more, 0.1 mass % or more, or 0.2 mass % or more, based on the total amount of the main agent and the initiator. From the viewpoint of the toughness of the adhesive layer, the content of the organic borane complex may be 10 mass % or less, 5 mass % or less, 3 mass % or less, or 1 mass % or less, based on the total amount of the main agent and the initiator.

[0036] From the viewpoint of developing adhesive strength, the content of the organic borane complex may be 0.01 mol% or more, 0.05 mol% or more, 0.1 mol% or more, or 0.5 mol% or more based on the total amount of the compound having a free radical polymerizable group. From the viewpoint of the toughness of the adhesive layer, the content of the organic borane complex may be 10 mol% or less, 5 mol% or less, 2 mol% or less, or 1 mol% or less based on the total amount of the compound having a free radical polymerizable group.

[0037] (N,N-disubstituted (meth)acrylamide)

[0038] The initiator contains N,N-disubstituted (meth)acrylamide. N,N-disubstituted (meth)acrylamide can be a stabilizer that can act on the stabilization of the organic borane complex and can contribute to the stabilization of the adhesive set. Among them, N,N-disubstituted (meth)acrylamide means a compound in which two hydrogen atoms on the nitrogen atom of (meth)acrylamide are replaced by groups other than hydrogen atoms. N,N-disubstituted (meth)acrylamide can be, for example, N,N-disubstituted acrylamide.

[0039] The N,N-disubstituted (meth)acrylamide may be, for example, a compound represented by the following formula (1).

[0040]

[0041] R 1 represents a hydrogen atom or a methyl group, R 1 It may be a hydrogen atom.

[0042] R 2 and R 3Each independently represents an alkyl group, and the number of carbon atoms of the alkyl group may be 1 to 20, 1 to 10, 1 to 6, or 1 to 3. The alkyl group may be any of a linear alkyl group, a branched alkyl group, or a cyclic alkyl group. The number of carbon atoms of a linear alkyl group is usually 1 to 20, and may be 1 to 10, 1 to 6, or 1 to 3. The number of carbon atoms of a branched alkyl group is usually 3 to 20, and may be 3 to 10 or 3 to 6. The number of carbon atoms of a cyclic alkyl group is usually 3 to 20, and may be 3 to 10 or 3 to 6.

[0043] As a straight-chain alkyl group, for example, a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-hexyl group, an n-octyl group, an n-dodecyl group, an n-hexadecyl group, etc. can be cited. As a branched alkyl group, for example, an isopropyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a 2-ethylhexyl group, a 3,7-dimethyloctyl group, a 2-hexyldecyl group, etc. can be cited. As a cyclic alkyl group, for example, a cyclopentyl group, a cyclohexyl group, an adamantyl group, etc. can be cited. Among these, the alkyl group can be a methyl group or an ethyl group, or a methyl group.

[0044] A part of the hydrogen atoms of the alkyl group may be substituted by a substituent. In this specification, a substituent refers to a group generally available in the field of organic chemistry. Specific examples of the substituent include a halogen atom (fluorine atom, chlorine atom, bromine atom, iodine atom), a cyano group, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an amino group, and the like.

[0045] R 2 and R 3 They may be bonded to each other or to each other through an oxygen atom to form a ring together with the nitrogen atom to which they are bonded. The formed ring (a heterocycle containing a nitrogen atom or a heterocycle containing a nitrogen atom and an oxygen atom) may be a four-membered ring or a five-membered ring or a seven-membered ring or less.

[0046] The N,N-disubstituted (meth)acrylamide may be, for example, a compound represented by the following formula (2).

[0047]

[0048] R 4 represents a hydrogen atom or a methyl group. 4 It may be a hydrogen atom.

[0049] R 5 and R 6 Each independently represents an alkylene group. The number of carbon atoms of the alkylene group may be 1 to 20, 1 to 10, 1 to 6 or 1 to 3. The alkylene group may be any of a straight chain alkylene group and a branched chain alkylene group. The number of carbon atoms of a straight chain alkylene group is usually 1 to 20, and may be 1 to 10, 1 to 6 or 1 to 3. The number of carbon atoms of a branched chain alkylene group is usually 3 to 20, and may be 3 to 10 or 3 to 6.

[0050] As the straight chain alkylene group, for example, methylene, ethylene, propylene, butylene, pentylene, hexylene, etc. can be mentioned. As the branched chain alkylene group, isopropylene, isobutylene, dimethylpropylene, etc. can be mentioned. Among these, the alkylene group can be ethylene.

[0051] A part of the hydrogen atoms of the alkylene group may be substituted with a substituent.

[0052] The heterocyclic ring containing a nitrogen atom or a heterocyclic ring containing a nitrogen atom and an oxygen atom may be, for example, a morpholine ring.

[0053] Specific examples of N,N-disubstituted (meth)acrylamide include N,N-dimethyl (meth)acrylamide, N,N-diethyl (meth)acrylamide, N,N-dipropyl (meth)acrylamide, N,N-diisopropyl (meth)acrylamide, N,N-di(n-butyl) (meth)acrylamide, N,N-di(tert-butyl) (meth)acrylamide and other N,N-dialkyl (meth)acrylamide; 4-(meth)acryloylmorpholine and the like. Among these, the N,N-disubstituted (meth)acrylamide may be 4-(meth)acryloylmorpholine or 4-acryloylmorpholine (ACMO).

[0054] In addition, since N,N-disubstituted (meth)acrylamide has a radical polymerizable group, it can also play the role of a compound having a radical polymerizable group (a (meth)acrylamide derivative) described later.

[0055] From the viewpoint of the adhesive composition showing adhesive strength in a short time, the content of N,N-disubstituted (meth)acrylamide (stabilizer) can be 0.1 mass % or more, 1 mass % or more, 3 mass % or more, or 5 mass % or more based on the total amount of the initiator. The content of N,N-disubstituted (meth)acrylamide can be 30 mass % or less, 25 mass % or less, 20 mass % or less, or 15 mass % or less based on the total amount of the initiator.

[0056] From the viewpoint of the adhesive composition showing adhesive strength in a short time, the content of N,N-disubstituted (meth)acrylamide (stabilizer) can be 0.01 mass % or more, 0.05 mass % or more, 0.1 mass % or more, or 0.5 mass % or more based on the total amount of the main agent and the initiator. From the viewpoint of the toughness of the adhesive layer, the content of N,N-disubstituted (meth)acrylamide can be 10 mass % or less, 7 mass % or less, 5 mass % or less, or 3 mass % or less based on the total amount of the main agent and the initiator.

[0057] From the viewpoint of the adhesive composition showing adhesive strength in a short time, the content of N,N-disubstituted (meth)acrylamide (stabilizer) can be 0.01 mol% or more, 0.05 mol% or more, 0.1 mol% or more, or 0.5 mol% or more based on the total amount of the compound having a free radical polymerizable group. From the viewpoint of the toughness of the adhesive layer, the content of N,N-disubstituted (meth)acrylamide can be 10 mol% or less, 7 mol% or less, 5 mol% or less, or 3 mol% or less based on the total amount of the compound having a free radical polymerizable group.

[0058] (Network Breaker)

[0059] The main agent contains a complex breaker. The complex breaker refers to a compound that can generate an organoborane by dissociating the Lewis base in the organoborane complex (organoborane-Lewis base complex). Therefore, the organoborane complex contained in the initiator and the complex breaker contained in the main agent are mixed and reacted to generate an organoborane that can serve as an initiator for living free radical polymerization.

[0060] As the decomplexing agent, for example, acids, anhydrides, aldehydes, β-keto compounds, etc. can be cited. These can be used alone or in combination of two or more. As an acid, for example, Lewis acids such as SnCl4 and TiCl4, aliphatic carboxylic acids, aromatic carboxylic acids, etc. can be cited. As anhydrides, for example, acetic anhydride, propionic anhydride, succinic anhydride, maleic anhydride, phthalic anhydride, etc. can be cited. As aldehydes, for example, benzaldehyde, o-, m- and p-nitrobenzaldehyde, etc. can be cited. As β-keto compounds, for example, methyl acetoacetate, ethyl acetoacetate, tert-butyl acetoacetate, 2-methylacyloxyethyl acetoacetate, etc. can be cited. Among these, from the viewpoint of the decomplexing reactivity with the organic borane complex and the storage stability of the main agent, the decomplexing agent can be an anhydride, and from the viewpoint of suppressing the coordination quality of the decomplexing agent, it can be succinic anhydride or maleic anhydride, or it can be maleic anhydride.

[0061] From the viewpoint that the adhesive composition shows bonding strength in a short time, the content of the network-breaking agent can be 0.01 mass %, 0.1 mass %, 0.2 mass % or 0.3 mass % or more based on the total amount of the main agent. From the viewpoint of ensuring the operation time from applying the adhesive composition to the adherend to laminating, the content of the network-breaking agent can be 10 mass %, 5 mass %, 3 mass %, 2 mass % or 1 mass % or less based on the total amount of the main agent.

[0062] From the viewpoint that the adhesive composition shows bonding strength in a short time, the content of the network breaker can be 0.01 mass %, 0.1 mass %, 0.2 mass % or 0.3 mass % or more based on the total amount of the main agent and the initiator. From the viewpoint of ensuring the operation time from applying the adhesive composition to the adherend to laminating, the content of the network breaker can be 10 mass %, 7 mass %, 5 mass %, 3 mass % or 1 mass % or less based on the total amount of the main agent and the initiator.

[0063] The molar ratio of the breaker to the organoborane complex (molar ratio of the breaker / molar ratio of the organoborane complex) can be, for example, more than 0.3, more than 0.5, more than 0.8 or more than 1. If the molar ratio is more than 1, it tends to obtain more sufficient bonding strength. The molar ratio of the breaker to the organoborane complex (molar ratio of the breaker / molar ratio of the organoborane complex) can be, for example, less than 50, less than 30, less than 10, less than 7, less than 5 or less than 3. The smaller the molar ratio, the more it tends to be able to more fully ensure the tendency of the operating time from applying the adhesive composition to the adherend to the bonding.

[0064] (Compound having a radical polymerizable group)

[0065] At least one of the main agent and the initiator further contains a compound having a free radical polymerizable group. The compound having a free radical polymerizable group is a compound having a polymerizable group that reacts by free radicals. As the free radical polymerizable group, for example, (meth) acryloyl, vinyl, allyl, styryl, alkenyl, alkenylene, maleimide, etc. can be cited.

[0066] The compound having a free radical polymerizable group may contain, for example, a compound having a (meth)acryloyl group. Examples of the compound having a (meth)acryloyl group include: a monofunctional (meth)acrylate having one (meth)acryloyl group, a polyfunctional (meth)acrylate having two or more (meth)acryloyl groups, and a (meth)acrylamide derivative. Among these, the compound having a (meth)acryloyl group may be a monofunctional (meth)acrylate having one (meth)acryloyl group.

[0067] Examples of the monofunctional (meth)acrylate include (meth)acrylic acid; methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, n-pentyl (meth)acrylate, n-hexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isodecyl (meth)acrylate, dodecyl (meth)acrylate (n-dodecyl (meth)acrylate), isobutyl (meth)acrylate, tert-butyl (meth)acrylate, n-pentyl (meth)acrylate, n-hexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isodecyl (meth)acrylate, dodecyl (meth)acrylate (n-dodecyl (meth)acrylate), isobutyl (meth)acrylate, Alkyl (meth)acrylates having an alkyl group, such as coryl, stearyl (meth)acrylate, and isostearyl acrylate; alkenyl (meth)acrylates having an alkenyl group, such as 3-butenyl (meth)acrylate; (meth)acrylates having an aromatic group, such as benzyl (meth)acrylate and phenoxyethyl (meth)acrylate; methoxytetraethylene glycol (meth)acrylate, methoxyhexaethylene glycol (meth)acrylate, methoxyoctaethylene glycol (meth)acrylate, methoxynonaethylene glycol (meth)acrylate, methoxypolyethylene glycol (meth)acrylate, methoxyheptaethylene glycol (meth)acrylate Alkoxypolyalkylene glycol (meth)acrylates such as alcohol (meth)acrylate, ethoxytetraethylene glycol (meth)acrylate, butoxyethylene glycol (meth)acrylate, butoxydiethylene glycol (meth)acrylate; (meth)acrylates having an alicyclic group such as cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, and dicyclopentyl (meth)acrylate; (meth)acrylates having a hydroxyl group such as 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate; N,N-dimethylaminoethyl (meth)acrylate. (meth)acrylates having an amino group such as methacryloyloxyethoxy)ethyl isocyanate, 2-(meth)acryloyloxyethyl isocyanate, and the like; (meth)acrylates having an isocyanate group such as tetraethylene glycol mono(meth)acrylate, hexaethylene glycol mono(meth)acrylate, hexapropylene glycol mono(meth)acrylate, dipropylene glycol mono(meth)acrylate, tripropylene glycol mono(meth)acrylate, and hexapropylene glycol mono(meth)acrylate; (meth)acrylates having a siloxane skeleton. These may be used alone or in combination of two or more.

[0068] Examples of the multifunctional (meth)acrylate include ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, tetrapropylene glycol di(meth)acrylate, and polypropylene glycol di(meth)acrylate. , ethoxylated polypropylene glycol di(meth)acrylate, 1,3-butylene glycol di(meth)acrylate, 1,4-butylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, 3-methyl-1,5-pentanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 2-butyl-2-ethyl-1,3-propanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, 1,10-decanediol di(meth)acrylate aliphatic (meth)acrylates such as ethoxylated bisphenol A di(meth)acrylate, propoxylated bisphenol A di(meth)acrylate, ethoxylated propoxylated bisphenol A di(meth)acrylate, ethoxylated bisphenol F di(meth)acrylate, propoxylated bisphenol F di(meth)acrylate, Aromatic (meth)acrylates such as (meth)acrylate, ethoxylated propoxylated bisphenol F type di(meth)acrylate, ethoxylated fluorene type di(meth)acrylate, propoxylated fluorene type di(meth)acrylate, ethoxylated propoxylated fluorene type di(meth)acrylate; aromatic epoxy (meth)acrylates such as bisphenol type epoxy (meth)acrylate, phenol novolac type epoxy (meth)acrylate, cresol novolac type epoxy (meth)acrylate, etc. These may be used alone or in combination of two or more.

[0069] Examples of (meth)acrylamide derivatives include N,N-dimethylaminopropyl (meth)acrylamide, N,N-dimethyl (meth)acrylamide, N-isopropyl (meth)acrylamide, N,N-diethyl (meth)acrylamide, N-hydroxyethyl (meth)acrylamide, and 4-(meth)acryloylmorpholine. These may be used alone or in combination of two or more.

[0070] The compound having a radical polymerizable group may include, for example, a copolymerizable compound copolymerizable with a (meth)acryloyl group in addition to a compound having a (meth)acryloyl group. Examples of the copolymerizable compound include compounds having a radical polymerizable group other than a (meth)acryloyl group, such as styrene, 4-methylstyrene, vinylpyridine, vinylpyrrolidone, vinyl acetate, cyclohexylmaleimide, and phenylmaleimide.

[0071] The compound having a radical polymerizable group may be contained in at least one of the main agent and the initiator. For example, the main agent may contain a compound having a radical polymerizable group.

[0072] From the viewpoint of improving the toughness of the adhesive layer and improving the adhesive strength, the content of the compound having a radical polymerizable group can be 40% by mass or more, 50% by mass or more, 60% by mass or more, or 65% by mass or more based on the total amount of the main agent and the initiator. From the viewpoint of suppressing the sagging of the applied adhesive composition and suppressing the reduction in the toughness of the adhesive layer, the content of the compound having a radical polymerizable group can be 99% by mass or less, 98% by mass or less, 95% by mass or less, 90% by mass or less, 85% by mass or less, or 80% by mass or less based on the total amount of the main agent and the initiator.

[0073] (Polymerization Control Agent)

[0074] At least one of the main agent and the initiator further contains at least one selected from the group consisting of a halogenated metal salt and a compound having a thiocarbonylthio structure as a polymerization control agent.

[0075] As the metal halide salt, for example, copper bromide (II), copper chloride (II), iron bromide (III), vanadium bromide (III), chromium bromide (III), ruthenium bromide (III), copper bromide (I), iron bromide (II), manganese bromide (II), cobalt bromide (II), nickel bromide (II), palladium bromide (II), etc. can be mentioned. These can be used alone or in combination of two or more. The metal halide salt can be, for example, copper bromide (II).

[0076] The compound having a thiocarbonylthio structure can be used without particular limitation as long as it has a thiocarbonylthio structure. For example, a chain transfer agent (RAFT agent) used in the field of RAFT polymerization (Reversible Addition / Fragmentation Chain Transfer) can be suitably used.

[0077] The polymerization control agent may be contained in at least one of the main agent and the initiator. For example, the main agent may contain the polymerization control agent.

[0078] From the viewpoint of ensuring the operation time from applying the adhesive composition to the adherend to laminating and improving the bonding strength, the content of the polymerization control agent can be 0.01 mass %, 0.02 mass %, 0.03 mass % or 0.05 mass % based on the total amount of the main agent and the initiator. From the viewpoint of the storage stability of the main agent, the content of the polymerization control agent can be 5 mass %, 3 mass %, 1 mass %, 0.5 mass % or 0.1 mass % based on the total amount of the main agent and the initiator.

[0079] From the viewpoint of ensuring the operation time from applying the adhesive composition to the adherend to laminating and improving the bonding strength, the content of the polymerization control agent can be 0.01 mol% or more, 0.03 mol% or more, 0.05 mol% or more, or 0.08 mol% or more based on the total amount of the compound having a free radical polymerizable group. From the viewpoint of the storage stability of the main agent, the content of the polymerization control agent can be 5 mol% or less, 3 mol% or less, 1 mol% or less, 0.7 mol% or less, 0.5 mol% or less, or 0.2 mol% or less based on the total amount of the compound having a free radical polymerizable group.

[0080] (filler)

[0081] The filler may be, for example, an inorganic filler or an organic filler. As the inorganic filler, for example, there may be mentioned inorganic particles such as silica, alumina, silica-alumina, titania, zirconium oxide, magnesium oxide, kaolin, talc, calcium carbonate, bentonite, mica, sericite, glass flakes, glass fibers, graphite, magnesium hydroxide, aluminum hydroxide, antimony trioxide, barium sulfate, zinc borate, wollastonite, xonotlite, whiskers, etc. When the inorganic filler is used as the filler, the inorganic filler may include a silica filler.

[0082] As organic fillers, for example, organic microparticles such as silicone, acrylic silicone, acrylic rubber, MBS (methacrylate butadiene styrene), polyamide, polyimide, etc. can be cited. These fillers (microparticles) may have a uniform structure or a core-shell structure. When an organic filler is used as a filler, the organic filler may include acrylic core-shell particles.

[0083] The organic filler may contain an antioxidant in the organic filler. The content of the antioxidant in the organic filler may be, for example, 15000 mass ppm or less, 10000 mass ppm or less, 5000 mass ppm or less, or 3000 mass ppm or less.

[0084] The filler can be contained in at least one of the main agent and the initiator. For example, the main agent can contain a filler containing an organic filler, or a filler containing acrylic core-shell particles. Furthermore, for example, the initiator can contain a filler containing an inorganic filler, or a filler containing a silica filler.

[0085] The content of the filler may be 1 mass % or more, 3 mass % or more, or 5 mass % or less, or 40 mass % or less, 35 mass % or less, or 30 mass % or less, based on the total amount of the main agent and the initiator.

[0086] (Plasticizer)

[0087] Examples of the plasticizer include phthalate-based compounds, alkylsulfonate-based compounds, and adipate-based compounds.

[0088] The plasticizer may contain at least one of a main agent and an initiator.

[0089] The content of the plasticizer may be 0.1 mass % or more, 0.3 mass % or more, or 1.0 mass % or less, or 30 mass % or less, 20 mass % or less, or 10 mass % or less, based on the total amount of the main agent and the initiator.

[0090] At least one of the main agent and the initiator may further contain, in addition to the above-mentioned components, a crosslinking agent, an ultraviolet absorber, a dehydrating agent, a pigment, a dye, an anti-aging agent, an antioxidant, an antistatic agent, a flame retardant, a tackifier, a dispersant, a solvent, and the like.

[0091] The adhesive kit of this embodiment can prepare an adhesive composition by mixing a main agent and an initiator. The temperature when the main agent and the initiator are mixed can be, for example, 10 to 35° C. The pot life of the adhesive kit can be, for example, 0.1 to 10 minutes.

[0092] When the main agent and the initiator are mixed, the molar ratio of the complex breaker in the main agent to the organic borane complex in the initiator (molar amount of the complex breaker / molar amount of the organic borane complex) is preferably greater than 0.3, greater than 0.5, greater than 0.8 or greater than 1, or less than 50, less than 30, less than 10, less than 7, less than 5 or less than 3.

[0093] When the main agent and the initiator are mixed, the main agent to the initiator is preferably mixed in a mass ratio (mass of the main agent / mass of the initiator) of, for example, 1 or more, 3 or more, or 5 or less, 200 or less, 100 or less, or 50 or less.

[0094] The method of mixing the main agent and the initiator is not particularly limited as long as the two are mixed. As a method of mixing the main agent and the initiator, for example, there can be cited: a method of mixing by hand, a method of mixing by manual coating using a common caulking gun, etc., a method of mixing using a pump (for example, a gear pump, a plunger pump, etc.) and a throttle valve that have quantitative liquid delivery for the raw material, and a method of mixing using a mechanical rotary mixer, a static mixer, etc. In addition, the mixing of the two and the coating of the adhesive composition described later can be continuously implemented by using a dispenser, a pistol, etc. that has a mechanism for separately configuring the main agent and the initiator, feeding the liquid to the nozzle, etc. from each place, mixing the two inside the nozzle, etc., and spitting out from the tip of the nozzle.

[0095] The prepared adhesive composition can be applied to a predetermined position to form an adhesive layer. Since the compound having a free radical polymerizable group is cured at a high molecular weight, the adhesive layer thus formed functions as an adhesive layer for bonding substrates to each other. The method of applying to a predetermined position can be applied by a previously known method such as a method using a dispenser.

[0096] The adhesive composition may be cured under conditions such as a curing temperature of 10 to 35° C. and a curing time of 24 to 96 hours.

[0097] [Adhesive body and method for producing the same]

[0098] An adhesive body according to one embodiment includes a first adherend, a second adherend, and an adhesive layer for bonding the first adherend and the second adherend to each other. The adhesive layer contains a cured product of the adhesive composition containing a main agent and an initiator in the adhesive set described above.

[0099] As the first adherend and the second adherend, for example, there can be mentioned plastic substrates such as polypropylene (PP), polyvinyl chloride, acrylonitrile / butadiene / styrene copolymer (ABS), polycarbonate (PC), polyamide (PA), polymethyl methacrylate (PMMA), polyester, epoxy resin, polyurethane (PUR), polyoxymethylene (POM), polyethylene (PE), ethylene / propylene copolymer (EPM), ethylene / propylene / diene polymer (EPDM), and metal substrates such as aluminum, steel, copper, and stainless steel.

[0100] Examples of the bonded body include plastic laminated substrates, metal laminated substrates, electronic components, semiconductor devices, and display components.

[0101] The manufacturing method of an adhesive body of one embodiment comprises: a step of bonding a first adherend and a second adherend via an adhesive composition containing a main agent and an initiator. The temperature when mixing the main agent and the initiator in the adhesive set, the conditions for curing the adhesive composition, etc. can be the same as above.

[0102] Example

[0103] Hereinafter, the present invention will be described in further detail with reference to Examples, but the present invention is not limited to these Examples.

[0104] <Examples 1-1 to 1-3, 2-1 to 2-3 and Comparative Examples 1-1 to 1-3, 2-1 to 2-3>

[0105] [Adhesive kit production]

[0106] (Preparation of raw materials)

[0107] Organoborane complex

[0108] TEB-DAP: Triethylborane-1,3-diaminopropane complex (molecular weight: 172.1, KISHIDA CHEMICAL Co., Ltd.)

[0109] Stabilizer

[0110] ACMO: 4-acryloylmorpholine (N,N-disubstituted acrylamide, molecular weight: 141.2, KJ Chemicals Corporation)

[0111] DMAA: N,N-dimethylacrylamide (N,N-disubstituted acrylamide, molecular weight: 99.1, FUJIFILM WakoPure Chemical Corporation)

[0112] DEAA: N,N-diethylacrylamide (N,N-disubstituted acrylamide, molecular weight: 127.2, Tokyo Chemical Industry Co., Ltd.)

[0113] DMAPAA: N-[3-(dimethylamino)propyl]acrylamide (N-monosubstituted acrylamide, molecular weight: 156.2, FUJIFILM Wako Pure Chemical Corporation)

[0114] Ace-MO: 4-acetylmorpholine (molecular weight: 129.2, Tokyo Chemical Industry Co., Ltd.)

[0115] Bu-MO: 4-isobutylmorpholine (molecular weight: 143.2, Tokyo Chemical Industry Co., Ltd.)

[0116] ·Network breaking agent

[0117] Maleic anhydride (molecular weight: 98.1, FUJIFILM Wako Pure Chemical Corporation) Succinic anhydride (molecular weight: 100.1, FUJIFILM Wako Pure Chemical Corporation)

[0118] ·Compounds having free radical polymerizable groups (polymerizable compounds)

[0119] FA-513AS: Dicyclopentyl acrylate (molecular weight: 206.3, SHOWA DENKO MATERIALSCO.,LTD.)

[0120] FA-310A: Phenoxyethyl acrylate (molecular weight: 192.2, SHOWA DENKO MATERIALSCO.,LTD.)

[0121] DMAA: N,N-dimethylacrylamide (molecular weight: 99.1, FUJIFILM Wako Pure Chemical Corporation)

[0122] Polymerization control agent

[0123] Copper(II) bromide (molecular weight: 223.4, FUJIFILM Wako Pure Chemical Corporation)

[0124] ·filler

[0125] RY200S: Fumed silica (fumed silica surface treated with silicone oil, Nippon Aerosil Co., Ltd.)

[0126] M210: acrylic core-shell particles (Kaneka Corporation, no antioxidant detected)

[0127] Plasticizer

[0128] PN-5090: Adipic acid polyester (ADEKA Corporation)

[0129] (Preparation of main agent)

[0130] The cleavage agent, the compound having a free radical polymerizable group, the polymerization control agent and the filler were weighed into a plastic bottle in the types and proportions shown in Tables 1 and 2 (unit: parts by mass), and a self-rotating revolution mixer (THINKYCORPORATION, Awatori Rentaro) was used to mix for 15 minutes at 2000 rpm, and further defoamed for 5 minutes at 2000 rpm to prepare the main agent of Examples 1-1 to 1-3, 2-1 to 2-3 and Comparative Examples 1-1 to 1-3, 2-1 to 2-3. In addition, the main agents of Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-3 are the same, and the main agents of Examples 2-1 to 2-3 and Comparative Examples 2-1 to 2-3 are the same.

[0131] (Preparation of Initiator)

[0132] The organic borane complex, stabilizer, plasticizer and filler were weighed into a plastic bottle in the types and proportions (unit: parts by mass) shown in Tables 1 and 2, and mixed at 2000 rpm for 15 minutes using an orbital stirrer (THINKY CORPORATION, AwatoriRentaro), and further defoamed at 2000 rpm for 5 minutes to prepare the initiators of Examples 1-1 to 1-3, 2-1 to 2-3 and Comparative Examples 1-1 to 1-3, 2-1 to 2-3.

[0133] [Measurement of adhesive strength]

[0134] Two polypropylene substrates (size: 100mm×25mm, thickness: 2mm) were prepared. A spacer with a thickness of 0.5mm was arranged on one of the polypropylene substrates so that the coating area of ​​the adhesive composition had a thickness of 0.5mm, 12.5mm in the length direction relative to the polypropylene substrate, and 25mm in the width direction relative to the polypropylene substrate. The main agent and the initiator were mixed by filling each main agent and each initiator into a manual dispenser. Using a manual dispenser, the adhesive coating area of ​​the polypropylene substrate equipped with a spacer was coated and bonded to another polypropylene substrate to obtain a laminate. The obtained laminate was placed at 25°C, and the shear strength after 5 hours after bonding was measured. For the shear test, the shear test was carried out at room temperature (25°C) using an automatic stereogrammer (manufactured by SHIMADZU CORPORATION, model: AGS X Plus, load cell: 50kN), with a distance between the chucks of 100mm and a pull speed of 5mm / min. The strength at break was measured, and the shear bond strength (MPa) was calculated from the measured value and the bonded area. The results are shown in Tables 1 and 2.

[0135]

[0136]

[0137] As shown in Tables 1 and 2, the adhesive composition of the example containing N,N-disubstituted (meth)acrylamide obtained sufficient adhesive strength in a short time compared with the adhesive composition of the comparative example not containing such compound. From these results, it can be confirmed that the adhesive kit of the present invention can prepare an adhesive composition that exhibits sufficient adhesive strength in a short time.

Claims

1. An adhesive kit comprising: The main agent contains a network-breaking agent; and Initiator, containing organic borane complex and N,N-disubstituted (meth) acrylamide, At least one of the main agent and the initiator further contains a compound having a free radical polymerizable group, At least one of the main agent and the initiator further contains at least one selected from the group consisting of a halogenated metal salt and a compound having a thiocarbonylthio structure.

2. The adhesive kit according to claim 1, in, The N,N-disubstituted (meth)acrylamide is a compound represented by the following formula (1): In formula (1), R 1 represents a hydrogen atom or a methyl group, R 2 and R 3 Each independently represents an alkyl group, R 2 and R 3 They may be bonded to each other or to each other through an oxygen atom to form a ring together with the nitrogen atom to which they are bonded.

3. The adhesive kit according to claim 1, in, The N,N-disubstituted (meth)acrylamide is a compound represented by the following formula (2): In formula (2), R 4 represents a hydrogen atom or a methyl group, R 5 and R 6 Each independently represents an alkylene group.

4. The adhesive kit according to any one of claims 1 to 3, in, The main agent further contains a compound having a radical polymerizable group.

5. An adhesive body, comprising: The first bonded body; a second adherend; and The adhesive layer bonds the first adherend and the second adherend to each other. The adhesive layer contains a cured product of the adhesive composition comprising the main agent and the initiator in the adhesive set according to any one of claims 1 to 3.

6. A method for producing an adhesive body, which is the method for producing an adhesive body according to claim 5, wherein include: A step of bonding the first adherend and the second adherend together via an adhesive composition containing the main agent and the initiator.

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