JPH06211282A - Structure for preventing aerosol can from being clogged - Google Patents

Abstract

PURPOSE:To make it possible to apply moisture hardening type primer elements in a spray without problems, by hardening an adhesive liquid-resin material for the purpose of sealing a gap between a recess and a cover member, thereby preventing the entry of moisure in the air into an aerosol can. CONSTITUTION:A cover member 30 is placed in the recess 18a of the mountain cap 18 of an aerosol can 2 so as to cover the nozzle opening 26 of the aerosol can 2. Then, the recess 18a is filled with an adhesive liquid-resin material 32, and it is hardened to seal the gap between the recess 18a and the cover member 30, thereby preventing the entry of moisture in the air into the aerosol can 2. Even after moisture hardening type primer for a sealing material is put into the aerosol can 2 and it is preserved for a long time, moisture hardening type primer elements do not come into contact with moisture in the air to react with it and the nozzle opening 26 is prevented from getting clogged. Thus, spray coating can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing clogging of an aerosol can, which is free from clogging even when an aerosol can containing a moisture-curable primer is stored for a long period of time.

[0002]

2. Description of the Related Art Aerosol cans are widely used as a means for spray-coating various liquid materials because the contents can be easily spray-coated. The use of a primer for a sealing material was attempted because the work efficiency could be significantly improved if it could be applied by spraying using an aerosol can. This spray coating with an aerosol can is suitably used for solvent type primers without any problems.

However, an aerosol can is filled with a primer for a moisture-curing sealing material, for example, a modified silicone-based, silicone-based, urethane-based, or polysulfide-based sealing material (hereinafter referred to as a moisture-curable primer),
After long-term storage, when spray coating is attempted, a small amount of water during the storage period, for example, moisture in the air and the moisture-curable primer component react and cure, and the outlet of the aerosol can is blocked. There is a problem that the moisture-curable primer component in the inside cannot be discharged.

[0004]

DISCLOSURE OF THE INVENTION The present invention was devised to solve the above-mentioned problems of the prior art. A primer for a moisture-curable sealant was filled in an aerosol can and stored for a long period of time. Even after that, the moisture-curable primer component does not contact-react with moisture in the air, and therefore the disadvantage that the discharge port is blocked does not occur, and the moisture-curable primer component can be spray-coated without trouble. It is an object of the present invention to provide a structure for preventing clogging of an aerosol can that enables the above.

[0005]

In order to solve the above-mentioned problems, in the aerosol can clogging prevention structure of the present invention, a cover member made of a water-impermeable material covers the ejection port of the aerosol can. Placed in the recess of the mountain cap of the aerosol can, and then the liquid resin material having adhesiveness is filled in the recess, and the liquid resin material is cured to seal the gap between the recess and the cover member. However, the moisture in the air is prevented from entering the aerosol can.

The present invention can be applied to aerosol cans having any spray coating mechanism as long as the contents can be spray coated. The primer for the sealing material to be stored in the aerosol can of the present invention is a moisture-curing sealing material, for example, a modified silicone-based, silicone-based, urethane-based, or polysulfide-based sealing material for a sealing material, which is used in the air. Includes all types that cure upon reaction with moisture.

As the cover member formed of the water-impermeable material, for example, a metal material can be used, and aluminum, lead or the like is preferable. It is needless to say that the liquid resin material having adhesiveness has low moisture permeability, but, for example, an epoxy resin material, a hot melt resin material, a reaction curing type resin material, etc. are suitable.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional explanatory view of a main part showing an embodiment of a structure for preventing clogging of an aerosol can of the present invention. The aerosol can used in the present invention may have a conventionally known structure as it is. The structure of the main part of the aerosol can 2 shown in FIG. 1 is well known in the art, but a brief description will be given.

In FIG. 1, the aerosol canister 2 has a movable valve 4
have. 6 is a valve chamber in which the movable valve is housed.
A stem 8 is provided above the movable valve 4. A stem hole 10 is formed at the lower end of the stem 8. 1
Reference numeral 2 is an annular stem rubber provided at the lower end of the stem 8. Reference numeral 14 is a housing forming the valve chamber 6. A through hole 16 is formed in the lower portion of the housing 14.

The housing 14 is an annular stem rubber 1.
It is fitted to the mountain cap 18 through 2.
Reference numeral 20 is a gasket rubber attached to the mountain cap 18.

Reference numeral 22 is a spring for constantly urging the movable valve 4 upward. Reference numeral 24 denotes a liquid absorbing tube attached to the lower end of the housing 14. Reference numeral 26 is a discharge port formed inside the stem 8.

Reference numeral 28 denotes a shaft hole, which is used for injecting a high-pressure injection liquid when filling the aerosol can. The shaft hole 28 can be one of the paths for infiltration of moisture in the air when the moisture-curable primer is filled.

In using the aerosol can 2,
A push button (not shown) having an injection port is attached to the upper end of the stem 8.

When this push button is pushed down, the movable valve 4
Falls, and the stem hole 10 opens in the valve chamber 6. The injection liquid in the valve chamber 6 is ejected from the stem hole 10 through the ejection port 26 and the ejection port.

When the pushing down force of the push button is released,
The movable valve 4 is pushed upward by the force of the spring 22 and returns to its original position. At this time, since the stem hole 10 is also closed again, the injection of the injection liquid in the valve chamber 6 is stopped.

The above aerosol can structure is known, and various other structures are also known. INDUSTRIAL APPLICABILITY The present invention can be applied to all aerosol cans provided with a mountain cap regardless of the spray mechanism. The feature of the present invention is that the cover member 30 is placed on the concave portion 18a of the mountain cap 18 of the above-described known aerosol can so as to cover the discharge port 26 of the aerosol can 2, and then the liquid resin having adhesiveness is placed. The material 32 is filled in the recess 18a, the liquid resin material is hardened to seal the gap between the recess and the cover member, and the moisture in the air is prevented from entering the aerosol can. That is.

The cover member 30 is made of a water-impermeable material,
For example, a metal material can be used, and it is necessary to be formed of aluminum, lead, or the like. It is needless to say that the liquid resin material having adhesiveness has low moisture permeability, but, for example, an epoxy resin material, a hot melt resin material, a reaction curing type resin material, etc. are suitable.

An experimental example in which a primer of a moisture-curable sealing material is filled in an aerosol can and the above-mentioned clogging prevention structure of the present invention is applied and a comparative experimental example using a mechanism other than the present invention will be described.

Experimental Example 1 and Comparative Experimental Examples 1 to 45 Primer MP1000 (polyisocyanate-based primer manufactured by Cemedine Co., Ltd.) 16 on 5 aerosol cans 16
5 ml and 135 ml of dimethyl ether were filled respectively. The following treatments were applied to these aerosol cans.

An aluminum cover member was placed in the recess of the mountain cap, and then the liquid epoxy resin material was filled in the recess and cured and sealed (Experimental Example 1). A plastic cap was attached to the discharge port of the stem of the aerosol can (Comparative Experimental Example 1). A metal (brass) cap was attached to the discharge port of the stem of the aerosol can (Comparative Experimental Example 2). The aerosol can was vacuum-packed with an aluminum film (Comparative Experimental Example 3). A plastic cap was attached to the discharge port of the stem of the aerosol can and further vacuum packed with an aluminum film (Comparative Experimental Example 4).

Each of the aerosol cans thus treated was stored horizontally at room temperature for 1 year and then evaluated for sprayability. In the case of Experimental Example 1, spraying was possible without any trouble, but in Comparative Experimental Examples 1 to 4, all were clogged and spraying was impossible.

[0022]

As described above, according to the present invention, even after the primer for the moisture-curable sealing material is filled in the aerosol can and stored for a long period of time, the moisture-curable primer component still contains moisture in the air. There is an advantage that the primer component can be sprayed and applied without any trouble, without causing a contact reaction with the above, and hence without causing an inconvenient situation that the discharge port is blocked.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a main part showing an embodiment of a structure for preventing clogging of an aerosol can according to the present invention.

[Explanation of symbols]

 2 Aerosol can 10 Stem 18 Mountain cap 26 Discharge port 30 Cover member 32 Resin material

Claims (1)

[Claims] 1. A cover member formed of a water-impermeable material is placed in a recessed portion of a mountain cap of an aerosol can so as to cover a discharge port of the aerosol can, and then a liquid resin material having adhesiveness is applied to the cover member. An aerosol can eye characterized in that the liquid resin material is filled in the recessed portion to cure the liquid resin material to seal the gap between the recessed portion and the cover member to prevent moisture in the air from entering the aerosol canister. Clog prevention structure.