JP2003200983A - Vessel for moisture-curable composition, and method for using adhesive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vessel for a moisture-curable composition in which the storage stability is not impaired even when the moisture-curable composition is filled at high temperature, and the strength, elasticity, heat resistance and releasability are excellent, and a method for using an adhesive capable of reducing industrial wastes generated when applying the moisture-curable adhesive by a bulk type applicator. <P>SOLUTION: In this vessel for the moisture-curable composition, an innermost layer is a heat-sealable film, and an aluminum film and a nylon film are laminated on the heat-sealable film in this order, and an outermost layer is a laminate film of an oriented polyester film or an oriented polyolefin film. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to storage of a moisture-curable composition at high temperature without impairing storage stability.
In addition, a container for a moisture-curable composition excellent in strength, elasticity, heat resistance, release property, and the like, and an adhesive that can reduce industrial waste generated in the application work of the moisture-curable adhesive by a bulk type applicator. Regarding usage.

[0002]

2. Description of the Related Art Hot-melt adhesives are solventless and have process and economic advantages such as instant bonding and high-speed bonding, so they are mainly used in the fields of packaging, bookbinding, woodworking, etc. Used in large quantities. Examples of these hot melt adhesives include ethylene-based copolymers such as ethylene-vinyl acetate copolymer (EVA) and ethylene (meth) acrylic acid ester copolymer (EEA) as base resins; polyethylene, polypropylene, amorphous poly Olefin-based resins such as α-olefin (APAO); styrene-isoprene-styrene copolymer (SIS), styrene-butadiene-styrene copolymer (SBS), synthetic rubbers such as hydrogenated products thereof; polyester resins; polyamide resins, etc. A thermoplastic hot melt adhesive obtained by the above, a post-crosslinking moisture-curable hot melt adhesive having an isocyanate group or a silyl group, and the like are used depending on the application.

The above-mentioned moisture-curable hot-melt adhesives, especially the moisture-curable hot-melt adhesives which are solid at room temperature, are used in a wide range of applications because of their advantages such as one-component type, solvent-free, high-speed adhesiveness and high heat resistance. Since it is a very viscous liquid or solid at room temperature, it is heated and melted by an adhesive applicator equipped with a heating and melting facility called an applicator to have an appropriate viscosity, and then applied. Specifically, for example, a moisture-curable hot melt adhesive made of a urethane prepolymer having an isocyanate group is applied by a heated roll coater in the production of a honeycomb sandwich panel.

As the above-mentioned applicator, for example, a tank-type applicator in which a hot-melt adhesive is charged into a melting tank through a charging port, and the hot-melt adhesive is heated and melted in the melting tank, and a metal such as a pail or a drum can A bulk-type applicator that supplies a heated and melted adhesive by pressing a heating plate called a platen or a ram plate against the adhesive contained in the container is mentioned.

Conventionally, a container of a moisture-curable adhesive supplied to such an applicator has a heat resistance that can withstand filling and use of the moisture-curable adhesive at high temperature, a barrier property against moisture, transportation and transportation. Generally, a metal container in which the air present inside is replaced with an inert gas such as nitrogen or carbon dioxide has been used because it is required to have sufficient strength and elasticity.

However, in recent years, metal containers have been treated as industrial waste. Therefore, in order to reduce industrial waste, as an alternative container to the metal container, for example,
Paper such as aluminum packs and aluminum laminated paper containers,
Containers made of plastic film, aluminum film (aluminum foil), etc. are under consideration.

Among them, a heat-sealable film such as polyethylene or polypropylene is used as the innermost layer, and a nylon film for improving strength and workability and an aluminum film for improving moisture resistance are laminated in this order on this film. In addition, containers made of a laminated film having a polyester film as an outermost layer for improving designability, paintability, strength, etc. are used in fields such as food and medicine. When the container having such a structure is used as a container for a moisture-curable composition, there is no particular problem as long as the moisture-curable composition is from room temperature to about 60 ° C., but a temperature of more than 60 ° C., particularly about 100 ° C. When filling the product, the attached water contained in the nylon film (nylon resin) evaporates and permeates and diffuses into the inner surface (innermost layer) of the container. Since it progresses and storage stability is impaired, it was necessary to sufficiently dry the container in advance to sufficiently evaporate the attached water contained in the nylon film (nylon resin).

However, since the drying step requires a great deal of time, place, man-hours, etc., there has been a problem that working efficiency and productivity at the time of filling the moisture-curable composition are remarkably reduced. In addition, the solid moisture-curable adhesive filled in the container made of the laminated film is opened and peeled off when the container made of the laminated film is put into the tank type applicator, and only the moisture-curable adhesive is stored in the tank. Although it can be used by throwing it into a bulk type applicator, there is a problem that a large amount of industrial waste is generated when it is used by throwing it in a bulk type applicator in the same manner.

[0009]

SUMMARY OF THE INVENTION In view of the above situation, the present invention does not impair storage stability even when the moisture-curable composition is filled at a high temperature, and has strength, elasticity, heat resistance and separation. An object of the present invention is to provide a container for a moisture-curable composition excellent in moldability and the like, and a method of using an adhesive capable of reducing industrial waste generated in a coating operation of the moisture-curable adhesive by a bulk type applicator. .

[0010]

Means for Solving the Problems In the present invention 1, an innermost layer is a heat-sealable film, an aluminum film and a nylon film are laminated in this order on the heat-sealable film, and an outermost layer is a stretched polyester. A container for a moisture-curable composition comprising a film or a laminated film which is a stretched polyolefin film. Invention 2
Is a step 1 of filling the container for moisture-curable composition according to claim 1 with a urethane-based moisture-curable adhesive to seal the container, and supplying an adhesive capable of attaching the container for moisture-curable composition to a bulk-type applicator. Step 2 of installing in a container for use, step 3 of attaching the container for supplying adhesive to a bulk type applicator, and opening the container for moisture-curable composition to the bulk type applicator to the urethane-based moisture-curable type It is a method of using an adhesive, which has a step 4 of supplying an adhesive. The present invention is described in detail below.

FIG. 1 is a cross-sectional view showing a laminated film used to form a container for moisture-curable composition of the present invention 1 (hereinafter, also simply referred to as "container").

As shown in FIG. 1, the laminated film is
The innermost layer is composed of a heat-sealable film.

As the heat-sealable film, like resin films used in ordinary retort packs and the like, resin films are adhered to each other to form 120 to 120
There is no particular limitation as long as the resin films exhibit sufficient adhesiveness when heat-melted at a temperature of about 200 ° C., that is, heat-sealable, and for example, unstretched polypropylene (hereinafter, also referred to as CPP). A film made of a polyolefin-based resin such as a low-density polyethylene (hereinafter, also referred to as LDPE), a linear low-density polyethylene (hereinafter, also referred to as LLDPE), and the like is preferably used because of excellent releasability. The thickness of the heat-sealable film is not particularly limited, but the preferred lower limit is 50 μm and the upper limit is 150 μm.

As shown in FIG. 1, the laminated film is
An aluminum film is laminated on the heat-sealable film, and a nylon film is further laminated on the aluminum film. The thickness of the aluminum film is not particularly limited, but the preferred lower limit is 5 μm and the upper limit is 50 μm.

The nylon film can suppress cracks and pinholes in the aluminum film and reinforce the toughness of the laminated film and the container, like the nylon film used in ordinary retort packs and the like. There is no particular limitation as long as it is, for example, nylon-6, nylon-66, nylon-11, nylon-
A film composed of 12 or the like is preferably used. The thickness of the nylon film is not particularly limited, but the preferred lower limit is 10 μm and the upper limit is 100 μm.

As shown in FIG. 1, the laminated film is
The outermost layer is composed of a stretched polyester film or a stretched polyolefin film. The stretched polyester film or the stretched polyolefin film is not particularly limited as long as it can impart toughness and flexibility to the laminated film and the container, and can improve the bag breaking strength and puncture strength of the container. The thickness of the stretched polyester film or the stretched polyolefin film is not particularly limited,
The preferred lower limit is 10 μm and the upper limit is 50 μm.

The thickness of the laminated film thus obtained is not particularly limited as long as a container satisfying the object of the present invention 1 can be obtained, but a preferable lower limit is 7
5 μm, the upper limit is 350 μm.

The method for laminating the heat-sealable film (innermost layer), the aluminum film, the nylon film, and the stretched polyester film or the stretched polyolefin film (outermost layer) constituting the above-mentioned laminated film is not particularly limited. Known laminating methods such as a thermal laminating method and an adhesive laminating method using an adhesive can be mentioned.

The adhesive used in the adhesive laminating method is not particularly limited, and known adhesives such as a one-component urethane type adhesive (preferably a paste type) and a two-component mixed type urethane adhesive can be used. Can be mentioned.

The container of the present invention 1 comprising the above-mentioned laminated film is not particularly limited as long as it is heat-sealed on several sides of the laminated film and provided with an opening for filling, and has any shape. May be. Specifically, for example, it may be a bag-shaped container obtained by simply heat-sealing three sides, or a self-standing container such as an ellipse or column obtained by three-dimensionally molding the bottom portion. May be

The moisture-curable composition to which the container of the present invention 1 is applied is not particularly limited as long as it is a composition capable of undergoing a moisture-curing reaction at room temperature to be cured. For example, urethane-based moisture-curable composition A silyl-based (modified silicone-based) moisture-curable composition having a polyoxyalkylene main chain and a polymer having a hydrolyzable silyl group capable of crosslinking at least one molecular end as a main component; a cyanoacrylate-based moisture-curable composition A mold composition or the like is preferably used. Among them, urethane-based moisture-curable composition is particularly preferably used. The urethane-based moisture-curable composition contains a urethane prepolymer having an isocyanate group, a hydrolyzable silyl group or a thiol group at the molecular end, and is solid at room temperature. The urethane moisture-curable composition can be obtained, for example, by reacting an organic polyol compound with an organic polyisocyanate compound, a silane coupling agent, or the like.

As the above-mentioned organic polyol compound, there may be mentioned known compounds usually used in the production of polyurethane, and examples thereof include polyester polyol, polyether polyol, polyalkylene polyol and polycarbonate polyol. These organic polyol compounds may be used alone or in combination of two or more.

Specifically, the above polyester polyols include, for example, terephthalic acid, isophthalic acid, 1,
Poly-dicarboxylic acids such as 5-naphthalic acid, 2,6-naphthalic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, decamethylenedicarboxylic acid and dodecamethylenedicarponic acid Carboxylic acid, ethylene glycol, propylene glycol,
1,3-propanediol, 1,4-butanediol,
Neopentyl glycol, 1,5-pentanediol,
Polyester polyol obtained by reaction with a polyol such as diethylene glycol or cyclohexanediol; poly- obtained by ring-opening polymerization of ε-caprolactam
Examples include ε-caprolactone polyol and the like.

Examples of the polyether polyols include polyethylene glycol, polypropylene glycol, polytetramethylene glycol and the like.
Examples of the polyalkylene polyol include polybutadiene polyol, hydrogenated polybutadiene polyol, hydrogenated polyisoprene polyol, and the like.
Examples of the polycarbonate polyol include polyhexamethylene carbonate polyol, polycyclohexane dimethylene carbonate polyol, and the like.

Examples of the above organic polyisocyanate compound include tolylene diisocyanate, liquid modified products of diphenylmethane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, cyclohexanephenylene diisocyanate, naphthalene-
1,5-diisocyanate and the like can be mentioned. Above all,
Diphenylmethane diisocyanate and its modified products are preferred because of their vapor pressure, toxicity and ease of handling.

Examples of the silane coupling agent include γ-aminopropylmethyldiethoxysilane, γ-
Aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-aminoethylaminopropyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidyloxypropyltrimethoxysilane, mercaptoethyl Examples thereof include triethoxysilane and γ-mercaptopropyltrimethoxysilane.

Considering the effectiveness of using the container of the present invention 1, a moisture-curable composition which is semi-solid or solid at room temperature and is non-adhesive is most preferably applied. It is liquid at room temperature, and even if it is tacky or non-tacky, it is semi-solid or solid at room temperature, and
Even if it is tacky, it is preferably applied.

When the moisture-curable composition is semi-solid or solid at room temperature, the moisture-curable composition may be heated and melted at the time of filling the container or taking it out of the container. The filling temperature of the heat-melted moisture-curable composition is not particularly limited, but the preferred lower limit is 60 ° C., and the upper limit is 1.
It is 30 ° C. When the temperature is lower than 60 ° C., the amount of heat at the time of filling is small, so that the adhered water contained in the nylon film is less likely to volatilize. If the temperature exceeds 130 ° C, the laminated film or container may be deteriorated by the heat during filling.

The application of the moisture-curable composition to which the container of the present invention 1 is applied is not particularly limited, and examples thereof include adhesives, fillers (sealing agents), paints, coating agents, lining agents and the like. Can be mentioned. The method of using the moisture-curable composition applied to the container of the present invention 1 as an adhesive is not particularly limited, and examples thereof include a method of charging the composition into a tank-type applicator and an adhesive of the present invention 2 described below. The usage method etc. are mentioned.

Since the container of the present invention 1 is composed of a laminated film in which a nylon film is laminated immediately below the outermost layer, even when the moisture-curable composition is filled at a high temperature, the adhered water contained in the nylon film is It does not volatilize (evaporate) on the inner surface of the container like the container No. 1, but evaporates (evaporates) on the outer surface of the container. Therefore, the moisture-curable composition filled in the container is unlikely to be affected by moisture and can exhibit excellent storage stability.

The method of using the adhesive of the present invention 2 is the same as that of the present invention 1.
Step 1 of filling the moisture-curable composition container with a urethane-based moisture-curable adhesive and sealing the container, the moisture-curable composition container is installed in an adhesive supply container attachable to a bulk applicator. Step 2, Step 3 of attaching the adhesive supply container to a bulk-type applicator, and
It has a step 4 of opening the container for moisture-curable composition and supplying a urethane-based moisture-curable adhesive from a bulk applicator.

The method of using the adhesive of the present invention 2 has a step 1 of filling the container for the moisture-curable composition of the present invention 1 with the urethane-based moisture-curable adhesive and sealing the container. As the urethane-based moisture-curable hot melt adhesive, the above urethane-based moisture-curable composition can be used. The urethane-based moisture-curable adhesive may be placed in the container of the present invention 1, but is placed in the adhesive supply container in step 2 described below because of the packing property / transportability during transportation. Up to this point, it is preferable that the container is put in the container of the first invention and further packed with a packing material. Examples of the packaging material include cardboard, pail cans, paper cans, fiber drums, and the like. Among them, cardboard or containers made of paper having a thickness of 2 mm or more are preferable. The packaging material may be incinerated to be recovered as energy, but is preferably recovered and repeatedly used.

In the above step 1, when the urethane-based moisture-curable adhesive is a non-fluid hot-melt adhesive at room temperature, the urethane-based moisture-curable adhesive is heated and melted to be used in a bulk. The present invention 1 is formed into a cylindrical shape so as to meet the specifications of a rotary applicator and platen.
It is preferable to fill the container for the moisture-curable composition described in 1. above.
Among them, for example, diameter 140 ± 10 mm, diameter 285
More preferably, it is formed into a cylindrical shape having a diameter of ± 10 mm or a diameter of 565 ± 10 mm.

In the method of using the adhesive of the present invention 2, a step 2 in which the above-mentioned container for moisture-curable composition is installed in an adhesive supply container attachable to a bulk type applicator, and the above-mentioned adhesive supply container Is attached to the bulk type applicator. The order of the steps 2 and 3 is not particularly limited, and the step 2 may be performed before the step 3 or after the step 3. In the present specification, the bulk type applicator can be attached with an adhesive supply container of a predetermined size, and the adhesive is introduced from this adhesive supply container by a heating plate such as a platen and a hose. It is a system adhesive coating machine.

The adhesive supply container according to the invention 1
Is not particularly limited as long as it can be installed in a bulk applicator and can supply a urethane-based moisture-curable adhesive to the bulk applicator. For example, metal or at least a thickness of 2 mm or more It is preferably a cylindrical container made of metal. More preferably, it is a paper can, a fiber drum, or the like made of laminated paper having a thickness of 2 mm or more because industrial waste can be reduced. The temperature of the platen and the hose is selected depending on the state of the adhesive, but the preferred lower limit is room temperature,
The upper limit is 130 ° C.

The method of using the adhesive of the present invention 2 has a step 4 of opening the container for the moisture-curable composition and supplying the urethane-based moisture-curable adhesive from the bulk applicator. In the step 4, it is preferable to supply the urethane-based moisture-curable adhesive from the bulk-type applicator by melting the urethane-based moisture-curable adhesive using a heating plate provided in the bulk-type applicator.

In the method of using the adhesive of the present invention 2, step 4 is used.
After the urethane-based moisture-curable adhesive in the container of the present invention 1 is used up, only the container of the present invention 1 is discarded, and the urethane-based moisture-curable adhesive of the present invention 1 is filled in the same manner. The container is placed in the adhesive supply container for use.

The method of using the adhesive of the present invention 2 is that the container of the present invention 1 having excellent storage stability is installed in a container for supplying an adhesive and used to prepare a urethane-based moisture-curable adhesive in a bulk type. The present invention 1 which is lightweight without being discarded as an industrial waste of the adhesive supply container after the urethane-based moisture-curable adhesive is used up by coating with an applicator.
The container can be discarded as industrial waste, so that the industrial waste can be reduced.

[0039]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

<Evaluation of container for moisture-curable composition> (Example 1) Stretched polyethylene terephthalate (stretched PET) film (thickness: 12 μm) / nylon film (thickness: 15 μm) / aluminum film (thickness) as the outermost layer Thickness: 9 μm) / CPP film as the innermost layer (thickness: 1
A laminated film A having a four-layer constitution of 00 μm) was produced, and using this laminated film A, a container as shown in FIG. 2 was produced. 2 is a cross-sectional view showing the container prepared in Example 1, which is the container for the moisture-curable composition of the present invention 1. As shown in FIG.

From 303 parts by weight of sebacic acid and 177 parts by weight of 1,6-hexanediol, an esterification polycondensation reaction was performed to obtain a crystalline polyester polyol (hydroxyl value: 30) which was a milky white solid at room temperature. Also, adipic acid 3
0 parts by weight and 134 parts by weight of isophthalic acid (molar ratio: 1 /
4) and 10 parts by weight of ethylene glycol and 80 parts by weight of neopentyl glycol (molar ratio: 1/4) by an esterification polycondensation reaction to give an amorphous polyester polyol (hydroxyl value: 55, glass transition temperature: 15 ° C.). ) Got. Next, 400 parts by weight of the crystalline polyester polyol and 600 parts by weight of the amorphous polyester polyol were melt-kneaded under heating at 120 ° C., depressurized to 133 Pa or less, and dehydrated. Then, after the temperature of the polyester polyol system was adjusted to 80 ° C., diphenylmethane diisocyanate (hereinafter, referred to as MDI) under a nitrogen gas atmosphere.
(Also called) (Mitsubishi Chemical Corporation, Isonate 125M)
202 parts by weight was added and reacted for 4 hours to synthesize a urethane moisture-curable composition. In the above synthesis reaction, the equivalent ratio (N
CO / OH) was 2.0. Further, the obtained urethane-based moisture-curable composition is a non-adhesive solid at room temperature, and its melt viscosity at 120 ° C. is 25.0 Pa · s.
Met.

The urethane-based moisture-curable composition obtained above is heated and melted at 100 ° C., and the obtained container is filled with 2.
After weighing and filling 5 kg, the inside of the container was purged with nitrogen gas, and the filling opening of the container was heat-sealed at 200 ° C. for 2 seconds at a linear pressure of 19.6 N / cm to give a urethane-based moisture-curable composition. A filled container was prepared. The filling of the urethane moisture-curable composition into the container was performed under each of the following three conditions a to c. a: The container was opened and then immediately filled. b: Without opening the container, the product was dried at 100 ° C. for 1 hour and then filled. c: The container was opened, dried at 100 ° C. for 1 hour, and then filled.

(Comparative Example 1) Aluminum film (thickness: 9 μm) as an outer layer / CPP film (thickness: as an inner layer)
A container and a urethane moisture-curable composition-filled container were produced in the same manner as in Example 1 except that the laminated film B having a two-layer structure of 100 μm) was used.

Comparative Example 2 Stretched PET film (thickness: 12 μm) / aluminum film (thickness: 9 μ) as the outermost layer
m) / nylon film (thickness: 15 μm) / the same as in the case of Example 1 except that a laminated film C having a four-layer structure of a CPP film (thickness: 100 μm) was used as the innermost layer and the container and A container filled with the urethane-based moisture-curable composition was produced.

(Evaluation) The mold release property, the storage stability, and the storage stability after the bending test of the containers filled with the urethane-based moisture-curable composition obtained in Example 1 and Comparative Examples 1 and 2 were evaluated. The following method evaluated. The results are shown in Table 1.

(1) The releasable urethane-based moisture-curable composition-filled container is left at room temperature for one day, and the urethane-based moisture-curable composition is sufficiently solidified. A cut was made with a cutter, a sensory test was conducted to determine whether the container was peeled from the solid urethane moisture-curable composition, and the releasability was evaluated according to the following criteria. [Judgment Criteria] A container was easily peeled from the solid urethane moisture-curable composition. Δ: Peeling of the container from the solid urethane moisture-curable composition was somewhat difficult. X: The container was not peeled from the solid urethane moisture-curable composition.

(2) Storage stability A container filled with a urethane-based moisture-curable composition is stored at 20 ° C.-6.
After being left in an atmosphere of 0% RH for 1 week, it was left in an oven at 100 ° C. for about 4 hours to heat and melt the urethane-based moisture-curable composition again. Next, take out the container filled with the urethane-based moisture-curable composition from the oven, cut the upper part of the container filled with the urethane-based moisture-curable composition with a cutter, and visually observe the surface of the melted urethane-based moisture-curable composition. Then, the storage stability was evaluated according to the following criteria. [Judgment Criteria] O ... No peeling was observed on the surface of the molten urethane-based moisture-curable composition. B: A thin skin was partially adhered to the surface of the melted urethane-based moisture-curable composition. X: Peeling was observed on the entire surface of the melted urethane-based moisture-curable composition.

(3) Storage stability after bending test As shown in the perspective view of FIG. 3, the upper part of the heat-sealed portion of the container filled with the urethane-based moisture-curable composition was about 3 cm above and below, respectively. After bending by bending 50 times to perform a bending test, the sample was left for 1 week in an atmosphere of 40 ° C.-90% RH. The container is then placed in an oven at 100 ° C for about 4
After allowing to stand for a while, heat and melt the urethane-based moisture-curable composition again, take out the urethane-moisture-curable composition-filled container from the oven, and use the cutter to cut the upper part of the urethane-moisture-curable composition-filled container. Cut through and visually observe the surface of the molten urethane-based moisture-curable composition,
The storage stability after the bending test was evaluated according to the following criteria. [Judgment Criteria] O ... No peeling was observed on the surface of the molten urethane-based moisture-curable composition. B: A thin skin was partially adhered to the surface of the melted urethane-based moisture-curable composition. X: Peeling was observed on the entire surface of the melted urethane-based moisture-curable composition.

[0049]

[Table 1]

As is clear from Table 1, the container of Example 1 which is the container of the present invention 1 is solid urethane-based moisture even when the urethane-based moisture-curable composition is filled at a high temperature (100 ° C.). The releasing property from the curable composition was excellent, and the urethane-based moisture-curable composition filled in this container was excellent in both storage stability and storage stability after bending test.

On the other hand, since the container of Comparative Example 1 using the laminated film B having a two-layer structure was insufficient in strength and elasticity, the urethane moisture-curable composition filled in this container was bent. Storage stability after the test was poor. Further, the container was also inferior in releasability from a solid urethane-based moisture-curable composition.

The container of Comparative Example 2 using the laminated film C having a four-layer structure of stretched PET film (outermost layer) / aluminum film / nylon film / CPP film (innermost layer) was attached to the nylon film. Since water volatilized (evaporated) to the inner surface of the container, the urethane moisture-curable composition filled in this container was inferior in both storage stability and storage stability after bending test.

<Evaluation of Method of Using Adhesive> (Preparation of Urethane Moisture-Curing Adhesive P) Molecular Weight 200
0 to 100 parts by weight of polypropylene glycol (Adeka Polyether P-2000 manufactured by Asahi Denka Co., Ltd.), CM
DI (Sumika Bayer Urethane Co., Sumidule 44V
-10) Add 150 parts by weight and react at 90 ° C. for 3 hours in a nitrogen stream to obtain a terminal isocyanate group content of 17%.
To obtain a urethane prepolymer. 50 parts by weight of this urethane prepolymer was heated and dried at 130 ° C. for 12 hours, 2 parts by weight of 200 mesh mica pieces, 50 parts by weight of calcium carbonate (inorganic filler), colloidal silica (thixotropic agent).
3 parts by weight and curing catalyst (U-CA, manufactured by San Avro Co., Ltd.)
T651M) 0.05 parts by weight, and in a nitrogen stream at 50 ° C
The mixture was stirred and mixed with to obtain a urethane moisture-curable adhesive P.
The viscosity of the urethane moisture-curable adhesive P at 20 ° C. was 20 Pa · s.

(Preparation of Urethane Moisture-Curing Adhesive Q)
Polyester polyol (hydroxyl number 30, DYNACOL 7360 manufactured by Tegusa Co., Ltd.) 1000 which is a crystalline solid at room temperature 1000
Part by weight was melt-kneaded at 120 ° C., the pressure was reduced to 133 Pa or less, and dehydration was performed. Then, after the temperature of the polyester polyol system was adjusted to 100 ° C., MDI was performed under a nitrogen atmosphere.
(Mitsubishi Chemical Co., Isonate 125M) 134.4
Parts by weight were added. The equivalent ratio (NCO / OH) between the isocyanate group of the MDI and the hydroxyl group of the polyol
Was 2.0. After reacting for 3 hours, a crystalline solid urethane prepolymer was obtained at room temperature to obtain a urethane moisture-curable adhesive Q.

(Example 2) PET was applied from the outer surface to the inner surface.
Film (thickness: 12 μm) / nylon film (thickness: 15 μm) / aluminum film (thickness: 9 μm) / L
A laminated film made of a DPE film (thickness: 100 μm) was produced, and using this laminated film, a diameter of 285
A cylindrical container having a size of mm and a height of 480 mm was produced. This container was placed in a straight pail can conforming to JIS Z1620, and then 18 kg of a urethane moisture-curable adhesive P was filled at 60 ° C. Then, after purging with nitrogen, the upper part of the container was heat-sealed under the condition of 150 ° C. × 3 seconds, and the urethane moisture-curable adhesive P was supplied by the following methods W and X.

W: A container containing the urethane-based moisture-curable adhesive P in a straight pail can was attached to a bulk type coating machine (made by Graco), the upper part of the container was cut with a cutter, and a platen was placed. Installed and supplied adhesive.
After the work was completed, the residue of the urethane-based moisture-curable adhesive P adhered to the container, and the amount of industrial waste generated was about 530 g. X: The container containing the urethane-based moisture-curable adhesive P was taken out from the straight pail and placed in a paper can having a diameter of 287 mm and a height of 365 mm made of laminated paper having a thickness of 3 mm. Thereafter, the adhesive was supplied in the same manner as in Method W. The amount of industrial waste generated after the work was about 485 g.

(Example 3) PET was applied from the outer surface to the inner surface.
Film (thickness: 12 μm) / nylon film (thickness: 15 μm) / aluminum film (thickness: 9 μm) / C
A laminated film made of a PP film (thickness: 100 μm) was produced, and using this laminated film, a diameter of 285 m
A cylindrical container having a m and a height of 480 mm was produced. This container has a diameter of 287 made of laminated paper with a thickness of 3 mm.
After being placed in a paper can having a height of 365 mm and a height of 365 mm, 20 kg of a urethane moisture-curable adhesive Q was filled at 100 ° C. Then, after purging with nitrogen, the upper part of the container was heat-sealed under the condition of 200 ° C. × 3 seconds, and then left at room temperature for 12 hours. After the adhesive was solidified, the container was packaged in a cardboard container, and the urethane moisture-curable adhesive Q was supplied by the following methods Y and Z.

Y: A container containing the urethane-based moisture-curable adhesive Q was taken out from the cardboard, put into a straight pail can in accordance with JIS Z1620, and then the upper part of the container was opened with a cutter, and the side of the straight pail can was opened. It was bent and fixed. Then, it was attached to a bulk-type applicator (PU-506 manufactured by Nordson), a platen was installed, and an adhesive was supplied. At this time, both the platen and the hose were set to 120 ° C. After the work was completed, the remaining adhesive was peeled off from the container, so the amount of industrial waste generated was 75 g. Z: The adhesive was supplied in the same manner as in Method Y except that a paper can having a diameter of 287 mm and a height of 365 mm made of a laminated paper having a thickness of 3 mm was used instead of the straight pail.
The amount of industrial waste generated after the work was 83 g.

(Comparative Example 3) The urethane moisture-curable adhesive P was directly applied to JIS without using a container made of a laminated film.
Work was carried out in the same manner as in Method W of Example 2 except that it was filled in a straight pail according to Z1620. The industrial waste after the work was a straight pail can with the adhesive adhered because the remaining urethane-based moisture-curable adhesive P was not peeled off from the straight pail can, and the amount of industrial waste generated was 2260 g. .

(Comparative Example 4) The urethane moisture-curable adhesive Q was directly applied to JIS without using a container made of a laminated film.
Work was carried out in the same manner as in Method W of Example 2 except that it was filled in a straight pail according to Z1620. The industrial waste after the work is a straight pail can with an adhesive, and the amount of industrial waste generated is 2140.
It was g.

The working steps of Examples 2 and 3 and Comparative Examples 3 and 4 were repeated 10 times each to obtain the total amount of industrial waste, and the results are shown in Table 2.

[0062]

[Table 2]

[0063]

EFFECTS OF THE INVENTION According to the present invention, a moisture-curable composition that does not impair storage stability even when filled at high temperatures and is excellent in strength, elasticity, heat resistance, mold releasability and the like. It is possible to provide a container for a curable composition and a method of using an adhesive that can reduce industrial waste when a moisture-curable adhesive is applied by a bulk type applicator.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a laminated film used to form a container for a moisture-curable composition of the present invention.

FIG. 2 is a cross-sectional view showing a container manufactured according to an example of the present invention.

FIG. 3 is a perspective view showing a bending test method for a container filled with a moisture-curable composition.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) B32B 15/08 104 B32B 15/08 104A B65D 65/40 B65D 65/40 D C09J 175/04 C09J 175/04 F term ( Reference) 3E068 AA40 AB05 AC09 CC21 CE01 EE40 3E086 AD01 BA04 BA13 BA15 BA33 BB02 BB41 BB85 CA40 4F100 AB10B AK01A AK03D AK07 AK41D AK48C BA04 BA07 BA10D DA02 EJ37 EJ37D JD07 JL12B01 MAJ04 MA01

Claims (4)

[Claims] 1. A laminated film in which the innermost layer is a heat-sealable film, an aluminum film and a nylon film are laminated in this order on the heat-sealable film, and the outermost layer is a stretched polyester film or a stretched polyolefin film. A container for a moisture-curable composition, comprising: 2. A step 1 of filling the container for moisture-curable composition according to claim 1 with a urethane-based moisture-curable adhesive to seal the container, the container for moisture-curable composition being attachable to a bulk type applicator. Step 2 of installing in the container for supplying adhesive, Step 3 of attaching the container for supplying adhesive to a bulk type applicator, and opening the container for moisture-curable composition to open the urethane-based moisture from the bulk type applicator. A method of using an adhesive, comprising the step 4 of supplying a curable adhesive. 3. The urethane-based moisture-curable adhesive is a hot-melt adhesive that is non-fluid at room temperature, and the adhesive supply container is a cylindrical container made of metal or at least 2 mm thick non-metal. In Step 1, the urethane-based moisture-curable adhesive is heated and melted to form a columnar shape and filled in a container for a moisture-curable composition, and in Step 4, the heating provided in the bulk-type applicator is performed. 3. The urethane-based moisture-curable adhesive is supplied from the bulk applicator by melting the urethane-based moisture-curable adhesive using a plate.
Use of the described adhesive. 4. The container for moisture-curable composition is packed in a container made of corrugated cardboard or paper having a thickness of 2 mm or more until it is installed in the container for supplying an adhesive in step 2. A method of using the adhesive according to claim 2 or 3.