JP2726870B2 - Aerosol adhesive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is non-toxic and safe for the human body, chemically stable, does not decrease in adhesive force over time, and has a valve or aerosol mechanism. The present invention relates to a pressure-sensitive aerosol adhesive which does not cause clogging due to an adhesive component in a button.

[Prior art] Conventionally, pressure-sensitive adhesives have been widely used for adhesive surfaces of so-called cellophane adhesive tapes, but in recent years, the demand for pressure-sensitive adhesives for use directly on surfaces to be adhered to has increased. I have. This type of pressure-sensitive adhesive is mainly used for attaching paper to paper, such as labeling cardboard cases, posters, photos, newspaper cutouts, stamps, etc. Used
Because of its simple usage, it is being used, for example, as an aerosol adhesive. As such a pressure-sensitive adhesive used as an aerosol adhesive, for example, a synthetic resin such as vinyl acetate resin, acrylic resin or chloroprene rubber, a synthetic rubber such as styrene rubber as a binder, It is known that a propellant is mixed with a liquid in which this is dissolved or dispersed in a solvent.

However, when a solvent having a large dissolving power such as an aromatic hydrocarbon-based solvent or a chlorine-based solvent is used as a solvent for the binder of the aerosol adhesive, such a solvent is highly toxic, so that it is harmful to the human body. There is a major safety problem and if a solvent with a low dissolving power is used, such solvent has low toxicity and has little problem with safety, but the physical properties required for the obtained aerosol adhesive To provide stability, a lot of effort is required at the product design stage and the production process stage,
There was a disadvantage that the cost was high.

In addition, conventional aerosol adhesives often cause clogging in valves and buttons of aerosol mechanisms due to the physical and chemical properties of the binder used, and as a result, the commercial value of the aerosol adhesive is reduced. There was a disadvantage of being small.

[Problems to be Solved by the Invention] Accordingly, the present inventors have conducted intensive studies in view of the above-mentioned prior art, and as a result, have low toxicity, are safe for the human body, are chemically stable, and have an adhesive force with time. The adhesive component does not completely solidify even when it dries, does not cause clogging in the valves and buttons of the aerosol mechanism, and is physically stable because the adhesive component is liquid at room temperature. The present inventors have found for the first time an entirely new aerosol adhesive which has solved all the problems of the prior art that it is easy to prepare, and have completed the present invention.

[Means for Solving the Problems] That is, the present invention relates to an aerosol adhesive characterized in that the adhesive component contains polybutene as a binder.

[Action and Examples] The aerosol adhesive of the present invention contains polybutene as a binder.

The polybutene used in the present invention is a compound having low toxicity and being chemically stable, and is easily soluble in solvents having low toxicity, such as saturated aliphatic hydrocarbons and saturated alicyclic hydrocarbons. It has an excellent property that it does not solidify.

Examples of the polybutene include a random copolymer of isobutylene and normal butylene.

The kinematic viscosity (37.8 ° C) of the polybutene is 600 cSt or more,
Preferably, it is 2000 cSt or more. When the kinematic viscosity is smaller than 600 cSt, the adhesive effect tends to decrease. The upper limit of the kinematic viscosity of the polybutene is not particularly limited, and even if it has a general-purpose high viscosity, it may be used.

The content of the polybutene in the adhesive component is 5 to 100.
% (% By weight, hereinafter the same), preferably 10 to 70%, particularly preferably 30 to 60%. When the content is less than 5%, the effect of imparting adhesive force to the obtained adhesive tends to be hardly exhibited. Here, that the polybutene content is 100% means that only polybutene is used as an adhesive component in the present invention, and when only polybutene is used as an adhesive component in this way, sufficient adhesive strength is obtained. Kinematic viscosity of polybutene is 600 cSt or more, especially 2000
It is preferably adjusted so as to be not less than cSt.

Rosin is preferably blended in order to give the adhesive component of the aerosol adhesive of the present invention a stronger adhesive force.

The rosin is a chemically stable compound having low toxicity similarly to polybutene, and is easily soluble in a low-toxic organic solvent of a saturated aliphatic hydrocarbon or saturated alicyclic hydrocarbon. Examples of such a rosin include natural rosin and synthetic rosin. In the present invention, any rosin can be used, but it is preferable to use a synthetic rosin because of its excellent chemical stability. Synthetic rosin is an alicyclic saturated hydrocarbon resin synthesized from petroleum naphtha, has almost no double bond in the molecule, and has no group containing elements other than carbon and hydrogen, so it has light resistance and other properties. It has excellent chemical stability. The natural rosin is a rosin ester obtained by esterifying abietic acid, which is a main component of the natural rosin, and typical examples thereof include ester gum. The content of the rosin in the adhesive component is
80% or less, preferably 60% or less, particularly preferably 50%
It is desirable that: If the content exceeds 80%, the adhesive strength tends to decrease and clogging tends to occur in valves and the like. The content of the rosin varies depending on the use of the obtained adhesive, and cannot be unconditionally determined. However, in order to impart a sufficient adhesive strength, it is usually preferably 30% or more.

The adhesive component of the aerosol adhesive of the present invention desirably has a viscosity at 25C of 50 to 10,000 cP, preferably 100 to 5000 cP. When the viscosity is less than 50 cP, it tends to sag on the coated surface, and thus the usability tends to be poor. When it exceeds 10,000 cP, clogging tends to occur in valves and the like.

If the viscosity of the adhesive component is within the above range, it can be used as it is, but if it is larger than the upper limit, it is diluted with an organic solvent and adjusted to a desired viscosity. Is preferred.

Examples of the organic solvent include low toxicity and good solubility of polybutene and rosin.For example, normal pentane, normal hexane, saturated aliphatic hydrocarbon solvents such as normal heptane, etc., and the like. They may be used alone or in combination of two or more. If necessary, these organic solvents may be used in combination with an alcohol solvent such as ethyl alcohol and isopropyl alcohol.

Since the content of the organic solvent in the adhesive component varies depending on the viscosity of the adhesive component as described above, it cannot be unconditionally determined. Therefore, it is desirable to appropriately adjust the content according to the use of the usually obtained aerosol adhesive.

Since the adhesive component comprising polybutene, rosin and organic solvent, if necessary, is chemically stable, the resulting aerosol adhesive has a very small decrease in adhesive strength over time.

Examples of the propellant used in the aerosol adhesive of the present invention include liquefied petroleum gas such as isobutane, normal butane, and propane; liquefied gas such as dimethyl ether;
Freon gases such as dichlorodifluoromethane, dichlorotetrafluoroethane, trichloromonofluoromethane, monochlorodifluoromethane, monochlorodifluoroethane, and trichlorotrifluoroethane; for example, compressed gases such as N ₂ gas and CO ₂ gas; Are used alone or in combination of two or more.

The weight ratio of the propellant to the adhesive component (hereinafter referred to as “adhesive component / propellant”) is 5/95 to 95/5, preferably 30/70.
It is desirable that the adjustment be made to be 90/10, particularly preferably 50/50 to 85/15. Such an adhesive component / propellant
If the ratio exceeds 95/5, the adhesive tends to be less likely to be sprayed.If the ratio is less than 5/95, the amount of the adhesive component in the aerosol adhesive is relatively small, and the obtained aerosol adhesion is obtained. The adhesive strength of the agent tends to be too small.

Among the propellants, liquefied petroleum gas, liquefied dimethyl ether gas and chlorofluorocarbon gas act as solvents for polybutene and rosin like the above-mentioned solvents, and can be used instead of the organic solvents. When such a propellant is used, it is not necessary to add a solvent, and the viscosity of the adhesive component can be easily adjusted to an appropriate one, which is preferable. Of course, these propellants may be used in combination with the organic solvent so that the viscosity of the adhesive component becomes a desired value.

In the present invention, besides the above-mentioned polybutene, rosin and organic solvent, thickeners such as, for example, silicic anhydride, liquid paraffin, and the like; fillers such as calcium carbonate, kaolin, baryta, talc, etc. May be appropriately added to the adhesive component.

The type of aerosol container used in the present invention is not particularly limited, and specific examples thereof include, for example, a commonly used aerosol container, a piston can,
Bag-in cans.

The aerosol adhesive of the present invention is obtained by putting the above-mentioned polybutene and an adhesive component containing a rosin and an organic solvent to be blended as necessary into an aerosol container, press-fitting a propellant into the aerosol container, sealing the mixture, and then inserting a nozzle into the aerosol container. If you adjust the viscosity of the adhesive to be particularly high, including a pressure-sensitive adhesive that is mainly used when bonding paper to each other, for example, an adhesive cockroach catcher, It can also be used for applications such as adhesives such as adhesive mouse traps. Also, depending on the purpose of use, for example, when a foam-type aerosol adhesive is obtained, the mixing ratio of the propellant may be reduced, and when a mist-type adhesive is obtained, the adhesive component is used. By changing the composition of the propellant by increasing the proportion of the propellant without increasing the viscosity of the product, or by selecting the type of nozzle to be attached to the aerosol container, it is adjusted to obtain the optimal discharge form for the intended use do it. The type of the nozzle is
For example, a mist spray nozzle may be selected when applying to a large area such as affixing a poster, and a paste or foam is applied when applying to a small area such as affixing a stamp. What is necessary is just to select a discharge type nozzle.

The aerosol adhesive of the present invention thus obtained has a low toxicity, is safe for the human body, has a very small decrease in adhesive force over time, and furthermore, the adhesive component does not completely solidify even when dried. Also, clogging does not occur in a valve or a button of the aerosol mechanism. Further, since such an adhesive component is liquid at room temperature, the obtained aerosol adhesive is physically stable and can be suitably used as a pressure-sensitive adhesive in various applications.

Next, the aerosol adhesive of the present invention will be described in more detail based on examples, but the present invention is not limited to only these examples.

 In each example, “parts” means “parts by weight”.

Example 1 Polybutene (manufactured by Idemitsu Petrochemical Co., Ltd., trade name: Idemitsu Polybutene 100H, kinematic viscosity: 11,200 cSt (37.8 ° C.)), synthetic rosin (manufactured by Arakawa Chemical Industries, Ltd., trade name: Archon M-10)
0) and normal hexane are mixed and dissolved so as to have the composition shown below, and a liquid adhesive component (viscosity: 150
cP (25 ° C)).

The next adhesive component is placed in an aerosol container (full filling: 2
30 ml), pressurized liquefied petroleum gas was injected in the amount shown below (pressure: 6 kg / cm ² · G), and after sealing, a foam discharge nozzle was attached to obtain a foam discharge aerosol adhesive. .

(Blending composition) Polybutene 23.5 parts Synthetic rosin 46 parts Normal hexane 30.5 parts Liquefied petroleum gas 17.5 parts After applying the obtained aerosol adhesive to paper, pasting photos and stamps, stable and timely adhesion It was found that there was no reduction in force and that the composition was suitable for application to a product having a small area. Next, when another paper was pressed with a finger onto the paper surface on which the adhesive was applied, the paper was bonded and integrated in a short time, and it was confirmed that the bonded surface had a stable adhesive force. Was.

From the above, it can be seen that the aerosol adhesive obtained above can be suitably used as a pressure-sensitive adhesive.

Next, when the sheets were left to be stuck together for a long time, no decrease in the adhesive strength was observed. Also, even when the aerosol adhesive was continuously ejected from the aerosol container, clogging did not occur at all in the valve or button of the aerosol mechanism.

Example 2 Polybutene (manufactured by Idemitsu Petrochemical Co., Ltd., trade name: polybutene 300H, kinematic viscosity: 37000 cSt (27.8 ° C.)), the same synthetic rosin used in Example 1, and the normal composition of hexane are shown below. To obtain a liquid adhesive component (viscosity: 800 cP (25 ° C.)). Next, the obtained adhesive component was put into an aerosol container (full filling amount: 230 ml), and then the following amount of nitrogen gas was injected (pressure; 6 kg / cm ² · G). By mounting, a paste-form ejection aerosol adhesive was obtained.

(Blending composition) 33 parts of polybutene 40 parts of synthetic rosin 27 parts of normal hexane 0.5 part of nitrogen gas The obtained aerosol adhesive was subjected to an experiment in the same manner as in Example 1, and the aerosol adhesive was used in Example 1. It was confirmed that it had the same excellent properties as those obtained.

Example 3 The same polybutene, synthetic rosin and normal hexane as used in Example 1 were mixed in the following amounts to obtain a liquid adhesive component (viscosity: 150 cP (25 ° C.)). Next, the adhesive component obtained was placed in an aerosol container, and then the following amount of liquefied dimethyl ether gas was injected under pressure (pressure: 4.9 kg).
/ cm ² · G), and a mist spray nozzle was mounted to obtain a mist spray quick-drying aerosol adhesive having the following composition.

(Blending composition) 20 parts of polybutene 50 parts of synthetic rosin 30 parts of normal hexane 65 parts of liquefied dimethyl ether gas When the obtained aerosol adhesive was used for attaching posters, it could be easily attached and had a suitable adhesive strength. Therefore, it was confirmed that the composition was suitable for application to a substance having a large area.

Example 4 The same polybutene and synthetic rosin as used in Example 1 and ester gum (trade name: Superester A-75, manufactured by Arakawa Chemical Industry Co., Ltd.), normal hexane and isopropyl alcohol were mixed and mixed as follows. A liquid adhesive component having a composition (viscosity: 130 cP (25 ° C.)) was obtained.

Aerosol container (full filling volume: 295ml)
Then, the liquefied petroleum gas in the amount shown below was press-fitted (pressure: 4 kg / cm ² ) and sealed, and a mist spray nozzle was attached to obtain a mist spray aerosol adhesive.

(Blending composition) Polybutene 15.5 parts Synthetic rosin 8 parts Ester gum 38.5 parts Normal hexane 20 parts Isopropyl alcohol 18 parts Liquefied petroleum gas 54 parts The obtained aerosol adhesive was used for attaching posters, and was obtained in Example 3. Stronger adhesive strength was obtained as compared with the case where the aerosol adhesive was used.

Example 5 Polybutene (manufactured by NOF CORPORATION, trade name: Polyvis NC)
-7000, kinematic viscosity: 1500 to 2000 cSt (98.9 ° C) 85 parts and liquefied petroleum gas 15 parts are put in an aerosol container (full filling amount: 160 ml), paste-type discharge type nozzle is attached and paste-type discharge type aerosol bonding I got the drug.

When the obtained aerosol adhesive was applied to cardboard and used for a cockroach-capturing sheet and a mouse-capturing sheet, it could be suitably used for any purpose.

Example 6 Polybutene (manufactured by NOF CORPORATION, trade name: Polybis 5)
N, 10 parts of kinematic viscosity: 4400 cSt (27.8 ° C) and 90 parts of liquefied petroleum gas were placed in an aerosol container (full volume: 230 ml), and a mist spray nozzle was attached to obtain a mist spray aerosol adhesive. .

The obtained aerosol adhesive was applied to one surface of the wallpaper, and then the powder pigment was adhered. As a result, the powder pigment adhered uniformly and firmly. This indicates that the obtained aerosol adhesive can be suitably used for the purpose of applying the adhesive and then adhering the powder pigment.

Example 7 Polybutene (manufactured by NOF Corporation, trade name: Polybis 01)
5N, 21 parts of kinematic viscosity: 860 cSt (37.8 ° C.), 70 parts of synthetic rosin (manufactured by Arakawa Chemical Industries, Ltd., trade name: Alcon M-100) and 9 parts of normal hexane are mixed to form a liquid aerosol adhesive ( (Viscosity: 120 cP (25 ° C.)). An aerosol container (full volume: 220 ml) was filled with 100 parts of the obtained aerosol adhesive and 8 parts of liquefied petroleum gas as a propellant, and then a paste discharge nozzle was attached to obtain a paste discharge aerosol adhesive. .

When the obtained aerosol adhesive was applied to the mortar surface, it could be applied uniformly to the uneven surface.
It can be seen that the obtained aerosol adhesive can be suitably used for a surface having a large area having irregularities.

Examples 8 to 12 Various components shown in Table 1 were prepared to obtain adhesive components. Table 1 shows the viscosity of the obtained adhesive component.

Next, the obtained adhesive component and the propellant shown in Table 1 were filled in an aerosol container (full quantity: 295 ml), and then a mist spray nozzle was attached to obtain a mist spray aerosol adhesive. As physical properties of the obtained aerosol adhesive, the adhesive strength, clogging of a valve, and ease of application were evaluated based on the following evaluation criteria. The results are shown in Table 1.

(Adhesive Strength) The obtained aerosol adhesive is applied to corrugated cardboard, a memo paper is stuck on the coated surface, and the evaluation is performed based on the following evaluation criteria.

(Evaluation Criteria) ：: High adhesive strength, suitable for use.

Δ: Adhesive strength is small and may not be suitable for practical use.

X: Practical use is impossible because the adhesive strength is too small.

(Clogging of valve) The obtained aerosol adhesive is discharged in 30 times a month and evaluated based on the following evaluation criteria.

(Evaluation Criteria) ：: No clogging occurs, and suitable for use.

Δ: Clogging is slightly observed, but practical.

×: Clogging occurs and cannot be used practically.

(Ease of application) The obtained aerosol adhesive is applied to a vertical corrugated paperboard and evaluated based on the following evaluation criteria.

(Evaluation criteria) ：: Uniform and easy application to the surface to be adhered.

Δ: Some sagging occurs on the adhered surface, but practical.

X: The coating is not uniformly applied to the surface to be adhered or the coating operation is difficult.

From the above results, it can be seen that all of the aerosol adhesives obtained in Examples 8 to 12 have excellent adhesive strength, do not cause clogging of the valve, and are easy to apply.

[Effect of the Invention] The aerosol adhesive of the present invention has no toxicity and is safe for the human body. Moreover, since the compounded adhesive component is chemically stable, excellent adhesive strength can be obtained over time. This has the effect of maintaining it for a long time without any significant change.

In addition, the aerosol adhesive of the present invention does not completely solidify even when the adhesive component dries, so that it does not cause clogging in the valve or button of the aerosol mechanism, and can be suitably used repeatedly for a long time. It works.

Furthermore, the aerosol adhesive of the present invention is physically stable because the adhesive component is liquid at room temperature, and can be easily prepared.

Claims (4)

(57) [Claims] An aerosol adhesive characterized in that the adhesive component contains polybutene as a binder. 2. The aerosol adhesive according to claim 1, wherein the adhesive component contains rosin. 3. The aerosol adhesive according to claim 2, wherein the rosin is a synthetic rosin. 4. A weight ratio between the adhesive component and the propellant (adhesive component:
The aerosol adhesive according to claim 1, wherein the propellant is blended in a ratio of 5:95 to 95: 5.