JPH10110148A - Adhesive for rigid vinyl chloride pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject adhesive capable of suppressing a cost and easily judging with the naked eye if the adhesive is coated or not by compounding titanium white having a specific range of its particle size in a specific ratio. SOLUTION: In compounding (C) titanium white to an adhesive containing (A) vinyl chloride-based resin and (B) an organic solvent, the component C having 0. 1-1μm particle size is compounded in (2/1000)-(1/100) pts.wt. to the adhesive. It is preferable to compound >=2/100 pts.wt. of (D) an oil soluble coloring agent (e.g. oil yellow, etc.) to the component A and treat the surface of the component C with a dispersant (e.g. aluminum hydrate, etc.).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive for hard PVC pipes, and more particularly to an adhesive for hard PVC pipes used for joining a hard PVC pipe for water supply and drainage to a joint.

[0002]

2. Description of the Related Art In the case of piping in a building or the like, there is a case where a temporary bonding is first performed without applying an adhesive, and then an adhesive is applied to a bonding portion to perform piping, for example, by adjusting dimensions. However, there is a case where the user forgets to apply the adhesive, causing a water leakage accident at the time of a water flow test or the like, and causing a great deal of damage.
Therefore, it is necessary to visually check whether or not the application of the adhesive has been forgotten.

On the other hand, when joining a rigid PVC pipe and a joint, an adhesive is applied to the outer peripheral surface of the end of the rigid PVC pipe and the inner peripheral surface of the joint. The joining is completed by holding and drying the tube with the tube end inserted, but at this time, the adhesive protrudes from the joint cross section. For this reason, conventionally, the presence or absence of the application of the adhesive has been determined by visually observing the “protrusion”.

[0004]

However, the conventional adhesive for rigid vinyl chloride tubes is colorless and transparent, while the color tone of the tube surface is blue, black or brownish. Therefore, the presence or absence of the adhesive is visually observed. It was difficult to judge. In order to facilitate such a visual judgment, the present applicant filed a Japanese Patent Application No. Hei.
No.25839, 1
Titanium white having a particle size of 10 μm to 10 μm
An adhesive with 0 parts by weight was proposed.

[0005] However, this conventional technique has a problem that the cost is increased due to the addition of titanium white. Further, titanium white having a particle size of 1 μm or more has poor dispersibility, and the white color is unbalanced. As a result, there is a problem that the overall color developability deteriorates. SUMMARY OF THE INVENTION Therefore, a main object of the present invention is to provide an adhesive for rigid vinyl chloride pipes, which can reduce costs and easily determine whether or not the adhesive is applied by visual inspection.

[0006]

SUMMARY OF THE INVENTION The present invention relates to an adhesive for hard vinyl chloride pipes in which titanium white is blended with an adhesive containing a vinyl chloride resin and an organic solvent, wherein the particle size of titanium white is 0.1 to 1 μm. , Titanium white is 2 /
1000 to 1/100 parts by weight,
Adhesive for rigid vinyl chloride pipes.

[0007]

[Function] Titanium white having a particle size of 0.1 to 1 μm is used as an adhesive.
/ 1000 to 1/100 parts by weight,
The color developability of the adhesive is improved as compared with the related art.

[0008]

According to the present invention, since the coloring property of the adhesive is improved, even if the surface of the tube is blue, black or brown, it is easy to visually determine whether or not the adhesive is applied. it can. Therefore, it is not necessary to forget to apply the adhesive as in the related art, and it is possible to prevent adverse effects such as a water leak accident.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments.

[0010]

For example, an adhesive is applied to the outer peripheral surface of the pipe end of the rigid polyvinyl chloride pipe and the inner peripheral face of the receiving port of the joint, and the pipe end of the hard vinyl chloride pipe is inserted into the receiving port of the fitting and held in that state. By drying, the rigid polyvinyl chloride pipe and the joint are joined. The adhesive used at this time is, in the first embodiment,
A dope cement type adhesive comprising a vinyl chloride resin or a vinyl chloride copolymer resin and an organic solvent has a particle size of 0.1.
It is obtained by blending 2 to 1000 parts by weight of 1 to 1/100 μm of titanium white. The amount of titanium white was 2/100 of the vinyl chloride resin or vinyl chloride copolymer resin.
100 to 1/10 parts by weight. As the titanium white, “TITONE A- made by Sakai Chemical Industry Co., Ltd.”
160 "can be used. In this example, the dispersibility is improved by subjecting titanium white to a surface treatment with a dispersant of 1/100 parts by weight or less of titanium white, for example, alumina hydrate.

As described above, by incorporating titanium white having a particle size of 0.1 to 1 μm, dispersibility is improved as compared with the conventional case. As a result, the color developability is improved. Therefore, the weight part of titanium white can be made smaller than before, and the cost can be reduced as a whole. A second embodiment is:
2 for vinyl chloride resin or vinyl chloride copolymer resin
This is an adhesive obtained by further blending oil yellow of 1/100 to 1/10 parts by weight with the adhesive of the first embodiment. This oil yellow is an oil-soluble colorant, whereby the adhesive exhibits a yellow color, which makes it easier to visually confirm. The amount of the oil yellow is 2/1000 to 1/100 parts by weight based on the above-mentioned dope cement type adhesive. As the oil yellow, a colorant “Oil Yellow GG-S” manufactured by Orient Chemical Industry Co., Ltd.
Can be used.

Although oil yellow is used in this embodiment, other colors of oil-soluble colorants may be used as long as the color tone is stronger than white. Further, in the above-described embodiment, hydrated alumina was used as a dispersant, but it is a matter of course that another dispersant may be used.
As the organic solvent, acetone, tetradrofuran, methyl ethyl ketone, cyclohexanone, or the like is used.

According to experiments performed by the inventors, the results are as shown in Table 1 below. However, "Kubota No. 2 adhesive" is a low-viscosity quick-drying adhesive of 15.0 to 17.5% of vinyl chloride resin and 15 to 25% of acetone (organic solvent), and the comparative example is Kubota No. 2 adhesive. Oil yellow GG-S 1/1
It is an adhesive blended with 00 parts by weight.

[0014]

[Table 1]

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09J 11/06 C09J 11/06

Claims (3)

[Claims] 1. An adhesive for hard vinyl chloride pipes in which titanium white is blended with an adhesive containing a vinyl chloride resin and an organic solvent, wherein the titanium white has a particle size of 0.1 to 1 μm, and the titanium white is an adhesive. 2/1000 to 1/100
An adhesive for rigid vinyl chloride pipes, which is in parts by weight. 2. 2/100 with respect to the vinyl chloride resin.
The adhesive for rigid vinyl chloride pipes according to claim 1, wherein an oil-soluble coloring agent is added in an amount of at least one part by weight. 3. The adhesive according to claim 1, wherein said titanium white is surface-treated with a dispersant.