Container for 1,1-dicyanoethylene composition and container containing contents

Abstract

The present invention provides: a container for a 1,1-dicyanoethylene composition, the container suppressing the discoloration attributed to 1,1-dicyanoethylene and having an olefin polymer part that contains an olefin polymer and has an aluminum concentration that is less than 100 mass ppm; and a container containing contents.

Description

Container for 1,1-dicyanoethylene composition and container with contents

[0001] The present invention relates to a container for a 1,1-dicyanoethylene composition and a container with contents.

[0002] 1,1-dicyanoethylene is sometimes used in curable adhesives due to its excellent reactivity. Because 1,1-dicyanoethylene has high reactivity, it is desirable to improve storage stability by adding an acid stabilizer such as benzenesulfonic acid, chlorobenzenesulfonic acid, or p-toluenesulfonic acid to the composition.

[0003] Meanwhile, resin containers are used as containers for adhesives from the viewpoints of storage stability, squeezability, lightness, etc. For example, Patent Documents 1 to 3 describe containers made of cycloolefin polymers as containers for 2-cyanoacrylate compositions. Furthermore, Patent Document 4 describes a multilayer container containing polyethylene as a plastic container for cyanoacrylate adhesives.

[0004] International Publication No. 2005 / 0014443 Japanese Patent Application Laid-Open No. 2001-064321 Japanese Patent Application Laid-Open No. 2001-088815 Japanese Patent Application Laid-Open No. 58-108135

[0005] However, no suitable containers for storing compositions containing 1,1-dicyanoethylene have yet been proposed. According to studies by the present inventors, it has been found that storing a composition containing 1,1-dicyanoethylene in a resin container may cause discoloration of the container.

[0006] In view of the above circumstances, an object of the present invention is to provide a container for a 1,1-dicyanoethylene composition and a container containing a content, which are capable of suppressing coloration caused by 1,1-dicyanoethylene.

[0007] As a result of intensive research conducted by the present inventors to solve the above problems, they found that coloration caused by 1,1-dicyanoethylene can be suppressed by using a container containing an olefin polymer having a concentration of a specific type of metal within a predetermined range. Based on this finding, they conducted further research and completed the present invention.

[0008] That is, the present invention is as follows: [1] A container for 1,1-dicyanoethylene compositions, comprising an olefin polymer (E) and an olefin polymer part (X1) having an aluminum concentration of less than 100 ppm by mass. [2] A container for 1,1-dicyanoethylene compositions according to [1] above, in which the olefin polymer part (X1) has a magnesium concentration of less than 33 ppm by mass. [3] A container for 1,1-dicyanoethylene compositions according to [1] or [2] above, in which the olefin polymer part (X1) has an iron concentration of less than 15 ppm by mass. [4] A container for 1,1-dicyanoethylene compositions according to any one of [1] to [3] above, in which the container for 1,1-dicyanoethylene compositions has a container body and an accessory member, and at least one selected from the group consisting of the container body and the accessory member contains the olefin polymer part (X1). [5] A container for 1,1-dicyanoethylene compositions according to [4] above, in which the container body and the accessory member contain the olefin polymer part (X1). [6] The container for 1,1-dicyanoethylene compositions according to [4] above, wherein at least one selected from the group consisting of the container body and the accessory member contains the olefin polymer portion (X1) at least at a site that comes into direct contact with the 1,1-dicyanoethylene composition (Y). [7] The container for 1,1-dicyanoethylene compositions according to any one of [1] to [6] above, wherein the olefin polymer (E) contains a structural unit derived from an α-olefin. [8] The container for 1,1-dicyanoethylene compositions according to any one of [1] to [7] above, wherein the olefin polymer (E) contains a structural unit derived from at least one selected from the group consisting of ethylene and propylene. [9] The container for 1,1-dicyanoethylene compositions according to any one of [1] to [8] above, wherein the 1,1-dicyanoethylene composition (Y) contains a Brønsted acid compound (C) in an amount of 0.1 ppm by mass or more and less than 15,000 ppm by mass.

[10] The container for a 1,1-dicyanoethylene composition according to any one of the above [1] to [9], wherein the 1,1-dicyanoethylene composition (Y) is an adhesive.

[11] A container containing an olefin polymer (E) and an olefin polymer part (X1) having an aluminum concentration of less than 100 ppm by mass; and a 1,1-dicyanoethylene composition (Y) filled in the container.

[0009] The present invention provides a container for a 1,1-dicyanoethylene composition and a container containing a content that suppresses coloration caused by 1,1-dicyanoethylene.

[0010] Hereinafter, an example of a mode for carrying out the present invention (hereinafter, sometimes referred to as "the present embodiment") will be described. However, the embodiment shown below is an example for embodying the technical idea of ​​the present invention, and the present invention is not limited to the following description. Furthermore, although preferred modes of the embodiment are shown in this specification, a combination of two or more of the individual preferred modes is also a preferred mode. For matters shown as numerical ranges, when there are several numerical ranges, the lower limit and upper limit can be selectively combined to form a preferred mode. In this specification, when a numerical range is described as "XX to YY," it means "XX or more and YY or less."

[0011] [Container (X) for 1,1-dicyanoethylene composition] The container (X) for 1,1-dicyanoethylene composition according to an embodiment of the present invention has an olefin polymer portion that contains an olefin polymer and has an aluminum concentration of less than 100 ppm by mass. In this specification, a composition containing 1% by mass or more of 1,1-dicyanoethylene (A) is referred to as a "1,1-dicyanoethylene composition (Y)." Hereinafter, the container (X) for 1,1-dicyanoethylene composition may be simply referred to as a "container (X)." Furthermore, the 1,1-dicyanoethylene composition (Y) may be simply referred to as a "composition (Y)."

[0012] According to the studies of the present inventors, it was found that when 1,1-dicyanoethylene composition (Y) is placed in the container (X), the container (X) becomes discolored after a predetermined time has elapsed. As a result of various studies, the present inventors found that the occurrence of discoloration can be significantly suppressed by lowering the concentration of aluminum contained in the container (X), and thus arrived at the present invention.

[0013] It has been previously believed that adding an acid to 1,1-dicyanoethylene (A) stabilizes 1,1-dicyanoethylene (A), and the phenomenon of discoloration occurring upon contact with a specific type of metal was not known. According to studies by the present inventors, discoloration not only occurs at the site where liquid 1,1-dicyanoethylene composition (Y) comes into direct contact with container (X), but also at the site where liquid 1,1-dicyanoethylene composition (Y) does not come into direct contact when 1,1-dicyanoethylene composition (Y) is placed in container (X) and sealed in the container (X) with an accessory member such as a lid. This phenomenon is specific to 1,1-dicyanoethylene composition (Y) and is not observed with cyanoacrylate adhesives such as ethyl 2-cyanoacrylate.

[0014] Although the reason why discoloration is suppressed by reducing the aluminum concentration in container (X) is not limited to this, one possible reason is as follows: It is believed that the polymerization of 1,1-dicyanoethylene (A) and the activation of the methylene at the α-position of 1,1-dicyanoethylene (A) are promoted when 1,1-dicyanoethylene (A) in composition (Y) comes into contact with the aluminum in container (X). It is presumed that reducing the aluminum concentration in container (X) makes it difficult for a colored structure having an absorption band in the visible light region to be formed in container (X) that contains composition (Y), and as a result, discoloration of the container (X) containing 1,1-dicyanoethylene composition (Y) is suppressed.

[0015] The container (X) for a 1,1-dicyanoethylene composition according to this embodiment includes an olefin polymer portion (X1) having a predetermined aluminum concentration, and thus discoloration of the container (X) is suppressed even when the 1,1-dicyanoethylene composition (Y) is stored therein. This prevents discoloration of the 1,1-dicyanoethylene composition (Y) during storage, which could impair its aesthetic appearance or cause discomfort to users. Furthermore, adverse effects such as deactivation of the 1,1-dicyanoethylene composition (Y), reduction in the active ingredients in the 1,1-dicyanoethylene composition (Y), and deterioration of the container (X) are also prevented. Furthermore, the container (X) is generally lighter than glass or metal containers, and does not require the separation process required for glass or metal containers when disposing of the composition contained therein if it deteriorates or hardens. In addition, by using a flexible olefin polymer (E) such as low-density polyethylene to make the olefin polymer portion (X1) flexible, the squeezability of the container (X) can be improved.

[0016] <Olefin polymer portion (X1)> As described above, the container (X) for a 1,1-dicyanoethylene composition according to this embodiment has an olefin polymer portion (X1) that contains an olefin polymer (E) and has an aluminum concentration of less than 100 ppm by mass. Since the aluminum concentration of the olefin polymer portion (X1) is sufficiently low, even if the 1,1-dicyanoethylene composition (Y) comes into contact with the olefin polymer portion (X1) or if volatilized 1,1-dicyanoethylene (A) adheres to the olefin polymer portion (X1), the occurrence of coloration caused by these factors is suppressed.

[0017] The olefin polymer segment (X1) contains an olefin polymer (E) as a main constituent. Specifically, the amount of the olefin polymer (E) contained in the olefin polymer segment (X1) is 50% by mass or more, preferably 60% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and even more preferably 90% by mass or more, based on the total mass of the resin components contained in the olefin polymer segment (X1). There is no particular upper limit for the amount of the olefin polymer (E) contained in the olefin polymer segment (X1), and it may be 100% by mass or 99% by mass, based on the total mass of the resin components contained in the olefin polymer segment (X1). In other words, the amount of the olefin polymer (E) contained in the olefin polymer segment (X1) is preferably 50 to 100% by mass, more preferably 50 to 99% by mass, based on the total mass of the resin components contained in the olefin polymer segment (X1).

[0018] (Configuration Example of Container (X)) In a first aspect of the container (X) for a 1,1-dicyanoethylene composition, the container (X) for a 1,1-dicyanoethylene composition has a container body and an accessory member, and at least one selected from the group consisting of the container body and the accessory member contains the olefin polymer portion (X1). In the first aspect, the container body may contain the olefin polymer portion (X1) and the accessory member may not contain the olefin polymer portion (X1), or the container body may not contain the olefin polymer portion (X1) and the accessory member may contain the olefin polymer portion (X1), or both the container body and the accessory member may contain the olefin polymer. From the viewpoint of enhancing the ability to suppress coloration, it is preferable that the container body and the accessory member contain the olefin polymer portion (X1).

[0019] Here, the "container body" refers to a main component that forms a space capable of accommodating composition (Y). The "accessory component" refers to a secondary component used together with the container body, such as at least one component selected from the group consisting of a cap, a nozzle, and an inner lid that together with the container body form a storage space and accommodate composition (Y) within the storage space. The storage space may be a sealed space. The accessory component also includes components necessary for application, such as a brush or spatula, and a case for accommodating the container body. At least one of the container body and the accessory component may be provided with a structural component (e.g., a threaded portion, a snap fit) for engaging with the other or fastening them to each other.

[0020] In a second embodiment of the container (X) for a 1,1-dicyanoethylene composition, the container (X) for a 1,1-dicyanoethylene composition consists only of a container body, and the container body includes an olefin polymer portion (X1). In this case, the number of parts is reduced, thereby simplifying the container configuration. In the second embodiment, for example, composition (Y) can be contained in the container body alone by placing composition (Y) inside the bag-shaped container body through its mouth and then sealing the mouth by heat sealing. Alternatively, a bag closure or a zipper structure can be provided near the mouth of the bag-shaped container body in advance, and after placing composition (Y) in the container body, the bag closure or the zipper structure can be closed, thereby containing composition (Y) in the container body alone.

[0021] In the first aspect, the entire container body and the entire accessory member may be the olefin polymer portion (X1), only a portion of the container body may be the olefin polymer portion (X1) and the entire accessory member may be the olefin polymer portion (X1), or the entire container body may be the olefin polymer portion (X1) and only a portion of the accessory member may be the olefin polymer portion (X1). In the first aspect, only a portion of the container body and only a portion of the accessory member may be the olefin polymer portion (X1). Furthermore, in the second aspect, the entire container body may be the olefin polymer portion (X1), or only a portion of the container body may be the olefin polymer portion (X1).

[0022] When only a portion of the container body is the olefin polymer portion (X1), or when only a portion of the accessory member is the olefin polymer portion (X1), the olefin polymer portion (X1) is preferably located at least on the inner surface that constitutes the storage space for the 1,1-dicyanoethylene composition (Y). By having the olefin polymer portion (X1) located on the inner surface that constitutes the storage space, the occurrence of coloration caused by the 1,1-dicyanoethylene (A) is suppressed when the liquid 1,1-dicyanoethylene composition (Y) comes into direct contact with the olefin polymer portion (X1) or when volatilized 1,1-dicyanoethylene (A) reaches the olefin polymer portion (X1).

[0023] The container (X) may be formed solely from the olefin polymer portion (X1), or may be formed from a resin laminate having at least one layer made of the olefin polymer portion (X1). In the latter case, it is preferable that the layer on the inner surface side constituting the space for containing the 1,1-dicyanoethylene composition (Y) is made of the olefin polymer portion (X1).

[0024] From the viewpoint of more effectively suppressing the occurrence of coloration, it is preferable that at least one selected from the group consisting of the container body and the accessory member contains the olefin polymer portion (X1) at least in a portion that comes into direct contact with the 1,1-dicyanoethylene composition (Y). Here, the term "a portion that comes into direct contact with the 1,1-dicyanoethylene composition (Y)" means, for example, (i) a portion that is constantly in contact with the liquid 1,1-dicyanoethylene composition (Y) (e.g., the bottom surface or wall surface), (ii) a portion that temporarily comes into contact with the liquid 1,1-dicyanoethylene composition (Y) when the container (X) is tilted or vibrated (e.g., the upper portion of the wall surface or the rear surface of the lid member), and (iii) a portion that is not initially in contact with the liquid 1,1-dicyanoethylene composition (Y) but that is constantly in contact with the liquid 1,1-dicyanoethylene composition (Y) after the container (X) is squeezed (e.g., the upper portion of the wall surface or the inner surface of the nozzle).

[0025] (Aluminum) Aluminum is a component that may be inevitably contained in the olefin polymer due to the catalyst used in producing the olefin polymer (E). The inventors have found through their studies that even if the olefin polymer (E) contains aluminum at a concentration of less than 100 ppm by mass, the occurrence of discoloration due to 1,1-dicyanoethylene (A) can be suppressed. Therefore, even if the aluminum concentration is not excessively low, a container (X) that does not cause discoloration can be obtained, and as a result, the production cost of the container (X) can be reduced while suppressing the occurrence of discoloration due to 1,1-dicyanoethylene (A).

[0026] As described above, the aluminum concentration of the olefin polymer segment (X1) is less than 100 ppm by mass, and from the viewpoint of more easily suppressing the occurrence of coloration, it is preferably 90 ppm by mass or less, more preferably 80 ppm by mass or less, and even more preferably 70 ppm by mass or less. There is no particular restriction on the lower limit of the aluminum concentration of the olefin polymer segment (X1), and it may be 0 ppm by mass. However, from the viewpoint of ease of production and cost, it is preferably 0.5 ppm by mass or more, more preferably 1.0 ppm by mass or more, and even more preferably 1.5 ppm by mass or more. In other words, the aluminum concentration of the olefin polymer segment (X1) is 0 ppm by mass or more and less than 100 ppm by mass, preferably 0.5 ppm by mass or more and less than 100 ppm by mass, more preferably 0.5 to 90 ppm by mass.

[0027] In order to set the aluminum concentration of the olefin polymer portion (X1) within the above range, for example, the type of catalyst or the type of co-catalyst used in synthesizing the olefin polymer (E) can be adjusted, or the catalyst can be removed by deashing or washing the olefin polymer (E) after synthesis.

[0028] (Metals Other Than Aluminum) The olefin polymer portion (X1) may or may not contain metals other than aluminum. The lower the content of metals other than aluminum, the easier it is to avoid the occurrence of deactivation of the 1,1-dicyanoethylene composition (Y) due to such metals. However, according to studies by the present inventors, it has been found that even if metals other than aluminum are contained up to a predetermined concentration, discoloration of the container, particularly due to 1,1-dicyanoethylene (A), does not occur. Therefore, by containing a metal other than aluminum at a concentration within a predetermined range, it is possible to reduce the production cost of the container while preventing discoloration.

[0029] From the viewpoint of easily ensuring the stability of the 1,1-dicyanoethylene composition (Y), the magnesium concentration of the olefin polymer portion (X1) is preferably less than 33 ppm by mass, more preferably 30 ppm by mass or less, even more preferably less than 25 ppm by mass, still more preferably 20 ppm by mass or less, and still more preferably 15 ppm by mass or less. There is no particular restriction on the lower limit of the magnesium concentration of the olefin polymer portion (X1), and it may be 0 ppm by mass, but from the viewpoints of ease of production and cost, it is preferably 0.1 ppm by mass or more, more preferably 0.3 ppm by mass or more, and even more preferably 0.5 ppm by mass or more. In other words, the magnesium concentration of the olefin polymer portion (X1) is preferably 0 ppm by mass or more and less than 33 ppm by mass, more preferably 0 to 30 ppm by mass, even more preferably 0 ppm by mass or more and less than 25 ppm by mass, still more preferably 0.1 ppm by mass or more and less than 25 ppm by mass, and still more preferably 0.1 to 20 ppm by mass.

[0030] From the viewpoint of easily ensuring the stability of the 1,1-dicyanoethylene composition (Y), the iron concentration of the olefin polymer portion (X1) is preferably less than 15 ppm by mass, more preferably 14 ppm by mass or less, even more preferably less than 10 ppm by mass, still more preferably 9 ppm by mass or less, and still more preferably 8 ppm by mass or less. There is no particular restriction on the lower limit of the iron concentration of the olefin polymer portion (X1), and it may be 0 ppm by mass, but from the viewpoint of ease of production and cost, it is preferably 0.2 ppm by mass or more, more preferably 0.3 ppm by mass or more, even more preferably 0.5 ppm by mass or more, and still more preferably 1.0 ppm by mass or more. In other words, the iron concentration of the olefin polymer portion (X1) is preferably 0 ppm by mass or more and less than 15 ppm by mass, more preferably 0 to 14 ppm by mass, even more preferably 0 ppm by mass or more and less than 10 ppm by mass, still more preferably 0.2 ppm by mass or more and less than 10 ppm by mass, and still more preferably 0.3 to 9 ppm by mass.

[0031] In order to set the magnesium concentration and iron concentration of the olefin polymer portion (X1) within the above ranges, for example, the types of catalyst and co-catalyst used in synthesizing the olefin polymer (E) can be adjusted, or the catalyst can be removed by deashing or washing the olefin polymer after synthesis.

[0032] The olefin polymer portion (X1) preferably has an aluminum concentration of 0 ppm by mass or more and less than 100 ppm by mass, a magnesium concentration of 0 ppm by mass or more and less than 33 ppm by mass, and an iron concentration of 0 ppm by mass or more and less than 15 ppm by mass, more preferably an aluminum concentration of 0.5 ppm by mass or more and less than 100 ppm by mass, a magnesium concentration of 0 to 30 ppm by mass, and an iron concentration of 0 to 14 ppm by mass, and more preferably an aluminum concentration of 0.5 to 90 ppm by mass, a magnesium concentration of 0 to 33 ppm by mass, and an iron concentration of 0 to 15 ppm by mass. It is more preferable that the aluminum concentration is 0 ppm by mass or more and less than 25 ppm by mass, and the iron concentration is 0 ppm by mass or more and less than 10 ppm by mass; it is even more preferable that the aluminum concentration is 0.5 to 90 ppm by mass, the magnesium concentration is 0.1 to 20 ppm by mass, and the iron concentration is 0.2 ppm by mass or more and less than 10 ppm by mass; it is even more preferable that the aluminum concentration is 0.5 to 90 ppm by mass, the magnesium concentration is 0.1 to 20 ppm by mass, and the iron concentration is 0.3 to 9 ppm by mass.

[0033] (Olefin Polymer (E)) Examples of the olefin polymer (E) contained in the olefin polymer segment (X1) include polyolefins and cycloolefin polymers.

[0034] The polyolefin is not particularly limited, and conventionally known polyolefins can be used. Examples of the polyolefin include various polyethylenes (PE) such as high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, very low-density polyethylene, and metallocene-catalyzed polyethylene, and polypropylenes such as polymethylpentene, propylene homopolymer, propylene-ethylene block copolymer, and propylene-ethylene random copolymer. Among these, from the viewpoint of processability, various polyethylenes such as high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, and metallocene-catalyzed polyethylene are particularly preferred. One or more polyolefins can be used in combination. These are readily available commercially, and ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, and thermoplastic elastomers may be added as needed.

[0035] From the viewpoints of flexibility and squeezability, the olefin polymer (E) preferably contains a structural unit derived from an α-olefin. Also, from the viewpoints of at least one of ease of production, cost, and moisture permeability, the olefin polymer (E) preferably contains a structural unit derived from at least one selected from the group consisting of ethylene and propylene.

[0036] The cycloolefin polymer is a polymer having an alicyclic structure in the main chain, obtained by polymerizing cycloolefins, particularly norbornenes. Commercially available cycloolefin polymers can also be used as the polyolefin, such as ZEONEX (registered trademark) and ZEONOR (registered trademark) from Zeon Corporation, APEL (registered trademark) from Mitsui Chemicals, Inc., and ARTON (registered trademark) from JSR Corporation.

[0037] (Other Components (Z1)) The olefin polymer segment (X1) may contain components other than the olefin polymer (E) and the above-described trace amounts of metals (hereinafter also referred to as "other components (Z1)"), provided that the purpose of the invention is not impaired. Examples of the other components (Z1) that can be contained in the olefin polymer segment (X1) include resin components other than the olefin polymer (E), weather stabilizers, heat stabilizers, antistatic agents, flame retardants, slip agents, antiblocking agents, antifogging agents, lubricants, dyes, pigments, natural oils, synthetic oils, waxes, and organic or inorganic fillers.

[0038] From the viewpoint of preventing a decrease in the properties of the 1,1-dicyanoethylene composition (Y) and facilitating an increase in its storage stability, the content of the other component (Z1) in the olefin polymer segment (X1) is preferably as small as possible, and it is more preferable that the olefin polymer segment (X1) does not contain the other component (Z1).

[0039] <Other structural part (X2)> When only a portion of the container body is the olefin polymer part (X1), or when only a portion of the accessory member is the olefin polymer part (X1), the part other than the olefin polymer part (X1) is a structural part made of a material different from the olefin polymer part (X1). Hereinafter, this structural part will be referred to as "other structural part (X2)." By providing the other structural part (X2), it is possible to make the moisture permeability and flexibility of the container (X) appropriate, and to reduce the manufacturing cost of the container (X).

[0040] When the other structural moiety (X2) is discolored by the 1,1-dicyanoethylene composition (Y) (for example, in the embodiment (X2b) described below), it is not used at least in a portion that comes into direct contact with the 1,1-dicyanoethylene composition (Y). Furthermore, when the other structural moiety (X2) is discolored by the 1,1-dicyanoethylene composition (Y), it is desirable not to use the other structural moiety (X2) in a portion that is reached by 1,1-dicyanoethylene (A) vaporized from the 1,1-dicyanoethylene composition (Y).

[0041] When the other structural part (X2) is not discolored by the 1,1-dicyanoethylene composition (Y), there are no particular restrictions on the location of the other structural part (X2) relative to the 1,1-dicyanoethylene composition (Y). However, when the other structural part (X2) has a layer or part that is permeable to 1,1-dicyanoethylene, it is desirable that no layer or part that is discolored by the 1,1-dicyanoethylene composition (Y) is present adjacent to the layer or part. Thus, for example, at least one of the container body and the accessory member described above may be formed from a resin laminate, and the outer layer of the resin laminate (the part that does not face the 1,1-dicyanoethylene composition (Y)) may be the other structural part (X2). Alternatively, when the container (X) is formed from a container body, an inner lid, and an outer lid, and the inner lid and the container body are capable of forming an enclosed space for the composition (Y), the outer lid may be the other structural part (X2).

[0042] Furthermore, when the other structural part (X2) is a laminate of a first layer that is discolored by the 1,1-dicyanoethylene composition (Y) and a second layer that is not discolored by the 1,1-dicyanoethylene composition (Y) and is impermeable to 1,1-dicyanoethylene, the position of the other structural part (X2) is not particularly limited, as long as the second layer faces the 1,1-dicyanoethylene composition (Y). When the other structural part (X2) is a laminate of a first layer that is discolored by the 1,1-dicyanoethylene composition (Y) and a third layer that is not discolored by the 1,1-dicyanoethylene composition (Y) but is permeable to 1,1-dicyanoethylene, the other structural part (X2) is desirably disposed in a position that does not face the 1,1-dicyanoethylene composition (Y) (i.e., a position that does not come into contact with the liquid 1,1-dicyanoethylene composition (Y) and a position that is not reached by the volatilized 1,1-dicyanoethylene composition (Y)).

[0043] Examples of the other structural portion (X2) include: an embodiment (X2a) made of a resin other than the olefin polymer (E); an embodiment (X2b) made of a resin containing the olefin polymer (E) and having an aluminum concentration of 100 ppm by mass or more; and an embodiment (X2c) made of a material other than a resin, such as metal or paper.

[0044] Examples of resins other than the olefin polymer (E) in the above embodiment (X2a) include polyamide, polyester, cellophane, fluororesins such as polytetrafluoroethylene (PTFE) and perfluoroalkoxyalkane (PFA), and polyvinyl chloride (PVC).

[0045] The above-mentioned embodiment (X2b) includes at least one of the materials exemplified as the olefin polymer (E) and having an aluminum concentration of 100 ppm by mass or more. The above-mentioned embodiment (X2b) is preferable because it has good heat-sealability with the olefin polymer portion (X1) and can form a resin molded product without using an adhesive.

[0046] Examples of materials other than resin that may be used to form the other structural portion (X2) include paper, metals such as aluminum foil, and composite materials thereof.

[0047] <Method for Producing Container (X)> The container (X) for a 1,1-dicyanoethylene composition according to this embodiment can be obtained by forming an olefin polymer (E) having an aluminum concentration of less than 100 ppm by mass into a predetermined shape by various molding methods. Examples of methods for obtaining a container of a predetermined shape from the olefin polymer (E) include a direct blow method, an injection blow method, an injection molding method, a method in which the polymer is extruded into a tube and then molded into a predetermined shape, and a method in which the polymer is molded into a sheet and then vacuum- or pressure-molded into a predetermined shape.

[0048] When the above-mentioned resin laminate is used, the resin laminate can be produced by appropriately utilizing a conventionally known method. For example, it can be obtained by a method of co-extruding the olefin polymer (E) (or a resin composition containing the olefin polymer (E)) and the other resins described above in a molten state into a sheet, a method of extruding a molten resin onto the surface of a sheet or film-like molded article to form a molded article, a method of laminating them with a known adhesive, or a method of laminating multiple sheet or film-like molded articles by heating and pressurizing them. The thickness of the laminate is set appropriately depending on the application.

[0049] Containers made of single-layer or multi-layer molded articles produced by the above-mentioned methods may be transparent containers that allow easy viewing of the contents, or may be thin-film coated with aluminum, silicon oxide, or the like by vapor deposition or other methods to further enhance light-blocking properties, moisture resistance, gas barrier properties, etc. Corona treatment, plasma treatment, flame treatment, electron beam treatment, etc. may also be performed to improve adhesiveness and printability. Furthermore, other resin coatings may be performed as necessary.

[0050] [1,1-dicyanoethylene composition (Y)] The 1,1-dicyanoethylene composition (Y) filled in the above-mentioned 1,1-dicyanoethylene composition container (X) contains at least 1,1-dicyanoethylene (A). The 1,1-dicyanoethylene composition (Y) may be 1,1-dicyanoethylene (A) alone, or may contain components other than 1,1-dicyanoethylene (A), such as a Brønsted acidic compound (C) or a polymerizable monomer (B). From the viewpoint of improving storage stability, the 1,1-dicyanoethylene composition (Y) preferably contains a Brønsted acidic compound (C).

[0051] <1,1-Dicyanoethylene (A)> 1,1-Dicyanoethylene (A) is produced, for example, according to the production method described in J. Am. Chem. Soc., 1989, 111, 9078-9081 or the production method described in U.S. Pat. No. 2,476,270. The purity of the 1,1-dicyanoethylene (A) is preferably 95% by mass or more, more preferably 97% by mass or more, even more preferably 98% by mass or more, and still more preferably 99% by mass or more. The purity of 1,1-dicyanoethylene can be determined, for example, by gas chromatography.

[0052] <Bronsted Acidic Compound (C)> The 1,1-dicyanoethylene composition (Y) preferably further contains a Bronsted acidic compound (C). When the 1,1-dicyanoethylene composition contains the Bronsted acidic compound (C), the storage stability of the 1,1-dicyanoethylene composition (Y) is improved, and a desired curing rate can be obtained. More specifically, since the 1,1-dicyanoethylene (A) cures with a small amount of water, it is preferable to completely remove the water during the production process. However, since completely removing the water is practically difficult, it is preferable to suppress curing (suppress the initiation of polymerization) by protonating the water using a Bronsted acid (C).

[0053] From the viewpoints of storage stability and availability, the Bronsted acid compound (C) may, for example, be an inorganic acid, a carboxylic acid, or an organic sulfonic acid. Among these, it is preferably at least one selected from sulfuric acid, hydrochloric acid, nitric acid, acetic acid, benzenesulfonic acid, p-toluenesulfonic acid, and methanesulfonic acid. It may also be a compound that reacts with water to produce a compound exhibiting Bronsted acidity, such as sulfur dioxide or diphosphorus pentoxide.

[0054] From the viewpoint of easily increasing storage stability while ensuring high reactivity, the 1,1-dicyanoethylene composition (Y) preferably contains 0.1 ppm by mass or more and less than 15,000 ppm by mass of the Brønsted acid compound (C), more preferably 1 ppm by mass or more and 10,000 ppm by mass or less, and even more preferably 10 ppm by mass or more and 8,000 ppm by mass or less.

[0055] <Polymerizable Monomer (B)> The 1,1-dicyanoethylene composition (Y) may further contain a polymerizable monomer (B). 1,1-dicyanoethylene (A) is excluded from the polymerizable monomer (B). The polymerizable monomer (B) is preferably reactive with 1,1-dicyanoethylene (A). The polymerizable monomer (B) may be one type or multiple types. The polymerizable monomer (B) may be a radical polymerizable monomer or an anion polymerizable monomer.

[0056] Examples of the polymerizable monomer (B) include ethylene, propylene, butadiene, isobutylene, isoprene, 1-hexene, 1-octene, vinyl acetate, vinyl propionate, vinyl butyrate, styrene, α-methylstyrene, p-methylstyrene, acrylic acid, methacrylic acid, alkyl acrylates such as butyl acrylate, alkyl methacrylates such as methyl methacrylate and dodecyl methacrylate, acrylonitrile, vinyl chloride, vinylidene chloride, vinylidene fluoride, alkyl 2-cyanoacrylates, alkyl 2-cyanopentadienoates, and dialkyl methylidenemalonates. Of these, from the viewpoint of excellent reactivity with 1,1-dicyanoethylene, it is preferable that the polymerizable monomer (B) is an alkyl 2-cyanoacrylate, and it is more preferable that the alkyl 2-cyanoacrylate is ethyl 2-cyanoacrylate.

[0057] The method for producing the polymerizable monomer (B) is not particularly limited, and known methods can be used alone or in combination to produce the polymerizable monomer (B). The polymerizable monomer (B) may be a commercially available product.

[0058] <Monomer Content> The total amount of the monomers (1,1-dicyanoethylene (A) and the polymerizable monomer (B) used as needed) is preferably 1% by mass or more, more preferably 5% by mass or more, and even more preferably 20% by mass or more, relative to the total mass of the 1,1-dicyanoethylene composition (Y), from the viewpoint of obtaining the desired physical properties. There is no particular upper limit on the amount of the monomer, and it may be 100% by mass, relative to the total mass of the 1,1-dicyanoethylene composition (Y). However, from the viewpoint of storage stability, it is preferably 99.9% by mass or less, more preferably 99.5% by mass or less, and even more preferably 99.0% by mass or less. When the polymerizable monomer (B) is used, the mass ratio of the 1,1-dicyanoethylene (A) to the polymerizable monomer (B) is not particularly limited, and may be 99:1 to 1:99, 80:20 to 20:80, or 70:30 to 30:70.

[0059] <Other Components (Z2)> The 1,1-dicyanoethylene composition (Y) may or may not contain one or more components (other components (Z2)) other than 1,1-dicyanoethylene (A), the Bronsted acid compound (C), and the polymerizable monomer (B). Examples of the other components (Z2) include phenolic compounds, acid anhydrides, Lewis acid compounds, thickeners, pigments, organic solvents, and inorganic fillers. The other components can be used in an amount within a range that does not impair the intended effects of the present invention.

[0060] The phenol compound is a compound other than the Bronsted acidic compound (C). Examples of the phenol compound include hydroquinone, p-methylphenol, p-methoxyphenol, and t-butylhydroquinone. Also usable are 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butylphenol, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 2,4-di-tert-butylphenol, 2,2'-methylenebis(4-methyl-6-t-butylphenol), 2,2'-methylenebis-(4- Ethyl-6-t-butylphenol) (Yoshinox 425), 4,4'-butylidenebis-(6-t-butyl-3-methylphenol) (Yoshinox BB), 2,2'-methylenebis[6-tert-butyl-4-methylphenol] (Sumilizer MDP-S), 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane (Adekastab AO-30), 4,4'-butylidenebis(6-tert-butyl-m-cresol) (Adekastab AO-40), octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (ADK STAB AO-50), 2,2'-dimethyl-2,2'-(2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diyl)dipropane-1,1'-diyl bis[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate] (ADK STAB AO-80), 1,3,5-trimethyl-2,4,6-tris(3, 5-di-tert-butyl-4-hydroxybenzyl)benzene (ADEKA STAB AO-330), 4,4'-thiobis[3-methyl-6-(tert-butyl)phenol] (SUMIRAIZER WX-R), 2,6-bis[(2-hydroxy-5-methylphenyl)methyl]-4-methylphenol, 2,4,6-tris(3',5'-di-tert-butyl-4'-hydroxybenzyl)mesitylene, 1'-hydroxy[2,2'-ethylidenebis[4,6-bis(1,Examples of specific o-substituted phenol compounds include 2-tert-butyl-4-methyl-6-(2-hydroxy-3-tert-butyl-5-methylbenzyl)phenyl acrylate (Sumilizer GM), and 2-tert-butyl-6-methyl-4-{3-[(2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepin-6-yl)oxy]propyl}phenol (Sumilizer GP).

[0061] Examples of the organic solvent include aromatic solvents such as toluene and xylene; aliphatic solvents such as hexane and heptane; naphthenic solvents such as cyclohexane; ester solvents such as ethyl acetate; and ether solvents such as tetrahydrofuran and diethyl ether. When the 1,1-dicyanoethylene composition (Y) contains an organic solvent, the content of the organic solvent in the 1,1-dicyanoethylene composition (Y) is preferably 80% by mass or less, more preferably 10% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of the curing rate of the composition. The lower the lower limit, the better, and it may be, for example, 0.000001% by mass (0.01 ppm by mass) or more.

[0062] (Method for Producing 1,1-Dicyanoethylene Composition (Y)) There are no particular limitations on the method for producing the 1,1-dicyanoethylene composition (Y). For example, the 1,1-dicyanoethylene composition (Y) can be produced by using the 1,1-dicyanoethylene (A) as is, or by a production method including a mixing step of mixing the 1,1-dicyanoethylene (A) with, as necessary, a Brønsted acidic compound (C), a polymerizable monomer (B), and other components (Z2). In order to prevent the polymerization reaction from proceeding due to moisture, it is preferable to produce the 1,1-dicyanoethylene composition (Y) in a dry atmosphere. There are no particular limitations on the method for mixing the components, and they can be mixed by known methods.

[0063] <Uses of 1,1-dicyanoethylene composition (Y)> The 1,1-dicyanoethylene composition (Y) is used in a variety of applications due to its high reactivity. For example, the 1,1-dicyanoethylene composition (Y) is an adhesive (particularly, an instant adhesive), a repair agent, a reinforcing agent, an injection agent, a putty, a decorative agent, a sealant, or a sealing agent. The 1,1-dicyanoethylene composition (Y) can be cured by reacting it with a Lewis base compound. Furthermore, by including the above-mentioned polymerizable monomer (B), the curability can be enhanced.

[0064] The Lewis basic compound functions as a polymerization catalyst for 1,1-dicyanoethylene (A) or a mixture of 1,1-dicyanoethylene (A) and a polymerizable monomer (B). Examples of the Lewis basic compound include water, alcohols, and alkylamines. Examples of alcohols include methanol, ethanol, and propanol. Examples of alkylamines include tertiary amines such as trimethylamine, triethylamine, tripropylamine, triisopropylamine, N,N-dimethylethylamine, N,N-dimethylpropylamine, and N,N-dimethylisopropylamine.

[0065] The amount of the Lewis basic compound is not particularly limited, but is preferably 0.001 to 1.0 part by mass, and more preferably 0.01 to 0.5 part by mass, per 100 parts by mass of the total of the 1,1-dicyanoethylene (A) and the polymerizable monomer (B). When the content of the Lewis basic compound is within the above range, the 1,1-dicyanoethylene (A) or the mixture of the 1,1-dicyanoethylene (A) and the polymerizable monomer (B) reacts quickly.

[0066] [Container (W) with Contents] The container (W) with contents according to an embodiment of the present invention comprises a container (X) having an olefin polymer portion (X1) containing an olefin polymer and having an aluminum concentration of less than 100 ppm by mass, and a 1,1-dicyanoethylene composition (Y) filled into the container. The container (W) with contents can be produced, for example, by (i) filling the container body with the 1,1-dicyanoethylene composition (Y) and then attaching an accessory member such as a cap or an inner lid to form the container (W), or (ii) filling the container body with the 1,1-dicyanoethylene composition (Y) and then sealing the inlet for introducing the composition by heat sealing or the like to form the container (W).

[0067] [Use of Container] The present invention also provides "use of a container." Examples of the use of the container include the following aspects: Use of a container (X) containing an olefin polymer (E) and having an olefin polymer part (X1) having an aluminum concentration of less than 100 ppm by mass, as a container for storing a 1,1-dicyanoethylene composition (Y). Any of the containers described above may be used as the container (X). For example, the container (X) is a container for a 1,1-dicyanoethylene composition according to any one of [1] to

[10] above, as described in the "Means for Solving the Problems" section.

[0068] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these.

[0069] [Coloration] 1,1-dicyanoethylene composition (Y) was filled into a sealable container having a container body and a lid member attached to the top of the container body, and stored in a sealed state at 23°C for 5 days. The degree of coloration of the container after storage was visually confirmed, and a colorless container was rated as "A," a container colored slightly yellow was rated as "B," and a container colored deeply orange was rated as "C." "A" and "B" were considered acceptable, and "C" was considered unacceptable.

[0070] [Metal Concentration in Olefin Polymer Portion (X1)] For Examples 1, 3, and 4, Comparative Examples 2 and 3, and Reference Example 1 described below, a measurement sample was obtained by cutting out a portion of the container body that was in contact with the 1,1-dicyanoethylene composition (Y). Furthermore, for Examples 2, 5, and 6, and Comparative Example 1 described below, a measurement sample was obtained by cutting out a portion of the lid member that was not in direct contact with the 1,1-dicyanoethylene composition (Y). 0.20 g of each measurement sample was added to 10 g of nitric acid (specific gravity 1.38), decomposed using a microwave decomposition device, and then diluted to 23 g with ion-exchanged water. The emission intensity of the diluted sample was measured by ICP mass spectrometry. Quantitative analysis of the metal ion concentrations in the solution was performed using a calibration curve prepared from aqueous metal ion solutions of known concentrations. The aluminum concentration (Al concentration), magnesium concentration (Mg concentration), and iron concentration (Fe concentration) were quantified and used as the metal concentration in the olefin polymer portion (X1). The decomposition conditions were as follows: Apparatus: Microwave sample pretreatment device "ETHOS UP" manufactured by Milestone General Co., Ltd. Decomposition conditions: The container was decomposed by carrying out four steps (steps 1 to 4) in this order, with the microwave output, internal temperature of the decomposition solution, external temperature of the container, and required time conditions shown in Table 1.

[0071] [Purity of 1,1-dicyanoethylene (A)] The purity of 1,1-dicyanoethylene (A) was measured by quantitative analysis using a calibration curve prepared from 1,1-dicyanoethylene (A) of known concentrations using gas chromatography (GC-2014AF / SPL manufactured by Shimadzu Corporation). Column: InertCap for Amines (30 m x 0.32 mm) Column temperature: 60°C x 1 min → 5°C / min → 90°C (no hold) → 50°C / min → 260°C x 6 min (Total 16.4 min) Vaporizer temperature: 250°C Detector temperature: 270°C Carrier gas: Helium Pressure: 97.0 kPa Total flow rate: 36.5 mL / min Column flow rate: 3.04 mL / min Linear velocity: 46.6 cm / sec Purge flow rate: 3.0 mL / min Split ratio: 10.0 Injection volume: 0.5 μl Solvent used: methyl acetate Internal standard: tetradecane

[0072]

[0073] The conditions for ICP mass spectrometry were as follows: Apparatus: Thermo Fisher Scientific ICP optical emission spectrometer "iCAP7000" ("iCAP" is a registered trademark); Integration time: 10 seconds; Number of repetitions: 3; Photometric direction: axial; Measurement wavelength: Aluminum 396.15 nm; Measurement wavelength: Magnesium 279.55 nm; Measurement wavelength: Iron 259.95 nm. The lower detection limits of the ICP optical emission spectrometer are 0.1 ppm by mass for Al concentration, 0.02 ppm by mass for Mg concentration, and 0.02 ppm by mass for Fe concentration.

[0074] [Production Example 1: Production of 1,1-dicyanoethylene (A)] 1,1,3,3-tetracyanopropane was synthesized from malononitrile in a yield of 73% according to the production method described in J. Am. Chem. Soc., 1989, 111, 9078-9081. The resulting crystalline 1,1,3,3-tetracyanopropane was mixed with diphosphorus pentoxide and subjected to thermal decomposition at 180°C to obtain a crude 1,1-dicyanoethylene product (yield: 60%). The crude product was purified by reduced pressure distillation (480 Pa) to obtain 1,1-dicyanoethylene (A) with a purity of 99% by mass.

[0075] [Production Example 2: Production of 1,1-dicyanoethylene composition (Y)] Under nitrogen, methanesulfonic acid (manufactured by Tokyo Chemical Industry Co., Ltd.) as the Brønsted acid compound (C) was added to the above 1,1-dicyanoethylene (A) and mixed so that the concentration of the latter was 5,000 ppm by mass, thereby preparing 1,1-dicyanoethylene composition (Y).

[0076] Example 1 A sealable container (capacity: approximately 5 mL) was prepared, having a container body and a lid member made of polyethylene having the Al, Mg, and Fe concentrations shown in Table 2-1. 1 mL of the 1,1-dicyanoethylene composition (Y) shown in Table 2-1 was filled into the container body, and the lid member was attached to seal the composition, thereby obtaining a container containing the contents. Coloring was then evaluated using the procedure described above. The evaluation results are shown in Table 2-1, along with the type of olefin polymer (E) in the container body and the lid member, the metal concentration, etc.

[0077] [Examples 2, 5, and 8] Each of the sealable containers (capacity: approximately 8 mL) was prepared, each having a lid member entirely made of polyethylene having the Al, Mg, and Fe concentrations shown in Table 2-1, and a container body entirely made of borosilicate glass. Then, 1 mL of the 1,1-dicyanoethylene composition (Y) shown in Table 2-1 was filled and sealed in the same manner as in Example 1 to prepare a container containing the contents, and coloration was evaluated. Note that, when evaluating coloration, the liquid 1,1-dicyanoethylene composition (Y) was kept out of direct contact with the lid member. The evaluation results are shown in Table 2-1, along with the type of olefin polymer (E) in the lid member, the metal concentration, and the like.

[0078] [Examples 3, 4, 7, 10, and 11] Airtight containers (capacity: approximately 8 mL) were prepared, each having a container body and a lid member entirely made of polyethylene having the Al concentration, Mg concentration, and Fe concentration shown in Tables 2-1 and 2-2. Then, in the same manner as in Example 1, 1 mL of the 1,1-dicyanoethylene composition (Y) shown in Tables 2-1 and 2-2 was filled into the container and sealed to prepare a container containing the contents, and coloration was evaluated. The evaluation results are shown in Tables 2-1 and 2-2, along with the type of olefin polymer (E) of the container body and the lid member, the metal concentration, and the like.

[0079] Examples 6 and 9 A sealed container (capacity: approximately 8 mL) was prepared, which had a lid member entirely made of polypropylene having the Al, Mg, and Fe concentrations shown in Tables 2-1 and 2-2, and a container body entirely made of borosilicate glass. Then, 1 mL of the 1,1-dicyanoethylene composition (Y) shown in Tables 2-1 and 2-2 was filled and sealed in the same manner as in Example 1 to prepare a container containing the contents, and coloration was evaluated. Note that, when evaluating coloration, the liquid 1,1-dicyanoethylene composition (Y) was kept out of direct contact with the lid member. The evaluation results are shown in Tables 2-1 and 2-2, along with the type of olefin polymer (E) in the lid member, the metal concentration, and the like.

[0080] Comparative Example 1 A sealable container (capacity: approximately 8 mL) was prepared, having a lid member entirely made of polypropylene having the Al, Mg, and Fe concentrations shown in Table 2-2, and a container body entirely made of borosilicate glass. Then, 1 mL of the 1,1-dicyanoethylene composition (Y) shown in Table 2-2 was filled and sealed in the same manner as in Example 1 to prepare a container containing the contents, and coloration was evaluated. Note that, during the evaluation of coloration, the liquid 1,1-dicyanoethylene composition (Y) was kept out of direct contact with the lid member. The evaluation results are shown in Table 2-2, along with the type of olefin polymer (E) in the lid member, the metal concentration, and the like.

[0081] [Comparative Examples 2, 3, and 4] A sealable container (capacity: approximately 8 mL) was prepared, having a container body and a lid member entirely made of polyethylene having the Al concentration, Mg concentration, and Fe concentration shown in Table 2-2. Then, 1 mL of the 1,1-dicyanoethylene composition (Y) shown in Table 2-2 was filled and sealed in the same manner as in Example 1 to prepare a container containing the contents, and coloration was evaluated. The evaluation results are shown in Table 2-2 together with the type of olefin polymer (E) of the container body and the lid member, the metal concentration, etc.

[0082] Reference Example 1 A container was filled with ethyl 2-cyanoacrylate and sealed in the same manner as in Comparative Example 2, except that ethyl 2-cyanoacrylate was used instead of the 1,1-dicyanoethylene composition (Y), to obtain a container containing the contents, and evaluation was carried out in the same manner as in Example 1. The evaluation results are shown in Table 2-2 together with the type of olefin polymer (E) of the container body and the lid member, the metal concentration, etc.

[0083]

[0084]

[0085] In Tables 2-1 and 2-2 above, "PE" represents polyethylene and "PP" represents polypropylene. *1: A container was filled with ethyl 2-cyanoacrylate at a concentration of 99.7% by mass.

[0086] As shown in Tables 2-1 and 2-2, the containers of Examples 1 to 11, in which the Al concentration in the olefin polymer was less than 100 ppm by mass, were evaluated as "A" or "B," indicating that discoloration caused by 1,1-dicyanoethylene was suppressed. In particular, the containers of Examples 1 to 5, 7, and 8, in which the Al concentration in the olefin polymer was 50 ppm by mass or less, were not discolored and were evaluated as "A," indicating that discoloration caused by 1,1-dicyanoethylene was further suppressed. The container of Example 10, in which the Al concentration in the olefin polymer was 10 ppm by mass or less and the Fe concentration was 30 ppm by mass, passed the evaluation of discoloration, but slight discoloration thought to be caused by iron and 1,1-dicyanoethylene was observed. The container of Example 11, in which the Al concentration in the olefin polymer was 10 ppm by mass or less and the Mg concentration was 14 ppm by mass, passed the evaluation of discoloration, but slight discoloration thought to be caused by magnesium and 1,1-dicyanoethylene was observed.

[0087] On the other hand, as shown in Table 2-2, the containers of Comparative Examples 1 to 4, in which the Al concentration in the olefin polymer was 100 ppm by mass or more, were evaluated for discoloration as lower than those of the Examples, and all were evaluated as "C." Note that the container of Reference Example 1, which contained ethyl 2-cyanoacrylate, did not show any particular discoloration, although the Al concentration in the olefin polymer was 100 ppm by mass or more.

[0088] The container for a 1,1-dicyanoethylene composition and the container containing the contents of the present invention suppress the occurrence of discoloration caused by 1,1-dicyanoethylene. Therefore, the container can be used as a storage container for storing a 1,1-dicyanoethylene composition without impairing its aesthetic appearance. This application is based on a Japanese patent application (Patent Application No. 2024-088037) filed on May 30, 2024, the entire contents of which are incorporated by reference.

Claims

1. A container for a 1,1-dicyanoethylene composition, comprising an olefin polymer (E) and having an olefin polymer portion (X1) having an aluminum concentration of less than 100 ppm by mass.

2. A container for a 1,1-dicyanoethylene composition according to claim 1, wherein the magnesium concentration of the olefin polymer portion (X1) is less than 33 ppm by mass.

3. A container for a 1,1-dicyanoethylene composition according to claim 1 or 2, wherein the iron concentration in the olefin polymer portion (X1) is less than 15 ppm by mass.

4. The container for a 1,1-dicyanoethylene composition according to claim 1 or 2, wherein the container for a 1,1-dicyanoethylene composition has a container body and an accessory member, and at least one selected from the group consisting of the container body and the accessory member contains the olefin polymer portion (X1).

5. A container for a 1,1-dicyanoethylene composition according to claim 4, wherein the container body and the accessory member contain the olefin polymer portion (X1).

6. The container for a 1,1-dicyanoethylene composition according to claim 4, wherein at least one selected from the group consisting of the container body and the accessory member includes the olefin polymer portion (X1) at least in a region that comes into direct contact with the 1,1-dicyanoethylene composition (Y).

7. A container for a 1,1-dicyanoethylene composition according to claim 1 or 2, wherein the olefin polymer (E) contains structural units derived from an α-olefin.

8. A container for a 1,1-dicyanoethylene composition according to claim 1 or 2, wherein the olefin polymer (E) contains structural units derived from at least one selected from the group consisting of ethylene and propylene.

9. A container for a 1,1-dicyanoethylene composition according to claim 1 or 2, wherein the 1,1-dicyanoethylene composition (Y) contains a Bronsted acid compound (C) in an amount of 0.1 ppm by mass or more and less than 15,000 ppm by mass.

10. A container for a 1,1-dicyanoethylene composition according to claim 1 or 2, wherein the 1,1-dicyanoethylene composition (Y) is an adhesive.

11. A container containing an olefin polymer (E) and an olefin polymer portion (X1) having an aluminum concentration of less than 100 ppm by mass, and a 1,1-dicyanoethylene composition (Y) filled in the container.

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