JPS58112963A - Caulking pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a tubular container for storing caulking material while preventing it from coming into contact with moisture in the air. The present invention relates to a caulking tube configured to insert a plunger into the opening at the base end of the container body to seal the container body after filling with a material.

Caulking materials such as urethane and V-recone ν-lant are
It does not harden in an anhydrous environment, but it hardens and hardens when it comes into contact with warm air, etc. Therefore, from the viewpoint of long-term stable storage of the caulking material, it is desirable that the caulking pipe has as much air impermeability as possible, and this air permeation is
It is known that, in FIG. 1, the main contact area is between the base end opening of the container body l and the plunger. For this reason, it is proposed that three tubes of coating film made of polyethylene-based microcrystalline wax, grease, latex, V-recone, etc. be formed on the inner peripheral surface of the opening at the base end of the container body l to prevent air permeation from the core. (Tokkai Sho! Co. 60771
(Refer to the publication) 0 illustrations in the example! is a sealed nozzle.

However, since the above-mentioned urethane/silicone sealants, which are caulking materials, contain organic solvents such as aromatics 1, acetate esters, or ketones, the vaporized organic solvent dissolves the above-mentioned coating film. The air permeation prevention effect may be lost. In addition, in urethane V-Ran), it reacts with the minimal amount of water contained in the compounding agent to generate carbon dioxide gas, and when the ambient temperature is high, the gas pressure increases and the coating As the film becomes fluidized, it may flow out to the outside and the air permeation prevention effect of the coating film may be lost.

In view of the above, an object of the present invention is to provide a caulking pipe that can sufficiently prevent air permeation through the contact portion between the bottom opening of the container body and the plunger.

The caulking pipe of the present invention comprises a main chain saturated or partially saturated hydrocarbon polymer having at least one hydroxyl group at the end on one or both of the inner circumferential surface of the proximal opening of the container body and the outer circumferential surface of the plunger. The above object is achieved by forming a coating film consisting of.

Hereinafter, the caulking pipe of the present invention will be explained in detail.

The hydrocarbon polymer with a saturated or partially saturated main chain having at least 4 to 7 hydroxyl groups at the terminal end (hereinafter referred to as "specific hydrocarbon polymer") used in this invention is described in Japanese Patent Application Publication No. 2003-120002. -/Ko3da! This is introduced in Publication No. λ, and is commercially available under the trade name 1Polytail H'' from the applicant (Mitsubishi Chemical Industries, Ltd.).

This specific hydrocarbon polymer is generally produced by hydrogenating a diene polymer or diene copolymer produced by a radical polymerization method, an anionic polymerization method, etc. using a conjugated diene monomer alone or a vinyl monomer together with a conjugated diene monomer as raw materials. obtained, molecular weight 200-koo,
It is planar, semi-solid, or liquid at room temperature. Here, when using radical polymerization, hydrogen peroxide is used as a polymerization initiator, but when using anionic polymerization,
By reacting a compound having a 00 group via a living polymer, it is possible to easily form a compound having a hydroxyl group at the end of the main chain.

The above-mentioned specific hydrocarbon polymer can be used as it is in liquid form (4).
- Semi-solid or solid particles are heated or dissolved in an organic solvent to make them liquid, and applied by brushing, spraying,
A coating film 3A is formed by a method such as dipping. This coating film 3A
After forming, the container body 1 is filled with caulking material, and then a plunger is inserted and sealed to store the caulking material q. At this time, for example, if the caulking material is a urethane sealant, the Woo group in the urethane reacts with the OH group of the specific hydrocarbon-based polymer, and the specific hydrocarbon is contained in the contact area between the bottom opening of the container body l and the plunger. It is assumed that a polyurethane gasket is formed and effectively prevents air permeation from the core. The same applies when the caulking material is silicone sealant.

Next, examples of the present invention will be listed together with comparative examples to confirm the effects of the present invention.

In both Examples and Comparative Examples, a polyethylene plunger (height/jcs+) was used in the polyethylene Q container body (filling capacity 13ocil, inner diameter 4A7jcs+), and the caulking material was urethane V-lat (star V-ru U).
-77; manufactured by Meiho Churchill ■), the coating length from the base end of the container body is all! (to). In addition, the specific hydrocarbon polymer in the examples is Polytail H
(Melting point; 4O-6IC1OH value; 4Iwon we/
P) was heated and melted at 120°C and applied with a brush.

Table 1 shows the coating materials, coating targets, and coating amounts for each example and comparative example.

<Test Method> The coking tubes of each of the Examples and Comparative Examples were left to stand under the following conditions and discharged using an air gun (pressure Qxt seconds) at a constant amount. The results are shown in Table 2, showing that the larger the discharge amount, the more the sealant is not hardened within the container body and is stably stored.

(1) Heat resistance test...! O℃ constant temperature bath x/4I days → room temperature x
Leave it for 3 days.

(2) Water resistance test...AO'C constant temperature water bath - 7 days
Leave it for 3 days.

From the results shown in Table 2, it can be seen that the caulking pipe of the present invention can sufficiently prevent air permeation from the contact area between the bottom opening of the container body and the plunger, and can store the caulking material stably for a long period of time.

Table 1 *1) Sunwax/A/-B (manufactured by Sanbe Kasei Co., Ltd.)
, Softening point/10℃ *2) T81F-III/(Toshiba V Recon Co., Ltd.)
Production) Kinematic viscosity; / 000 cSt (Kotc) 7- Table 2 Note) Discharge l before the test was l Yu 3t.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an example of a caulking pipe. l...container body, co...plunger, 3.3A...
・Painting film, caulking material,! ...Sealed nozzle. Patent application: Toyoda Goei Kaisha Nikinsha

Claims (1)

[Claims] A tubular container for storing caulking material while preventing it from coming into contact with moisture in the air, the container having a sealed nozzle at its tip and having an open base filled with caulking material. A booking tube configured to insert a plunger into a front end opening of the container body and seal it, having at least one hydroxyl group at one end on one or both of the inner peripheral surface of the opening of the front end of the container body or the outer peripheral surface of the plunger. A caulking pipe characterized in that a coating film is formed from a hydrocarbon polymer whose main chain is saturated or partially saturated.