JP4613612B2 - Method to transfer polyisobutylene sealant to one-pack type silicone sealant - Google Patents

Description

  The present invention relates to a method for transferring a polyisobutylene sealant to a one-pack type silicone sealant.

Sealing materials are widely used in buildings and the like for filling joints and gaps between various members to ensure watertightness and airtightness. Typical sealants for buildings include one-pack or two-pack sealants such as silicone sealants, modified silicone sealants, polyurethane sealants, and polysulfide sealants.
Among these, silicone-based sealants are widely used because of their excellent durability and weather resistance, but on the other hand, low molecular weight silicone components bleed out and scatter around the joints to remove dust, dirt, etc. Adsorption may contaminate the periphery where the silicone sealant is placed.
As a method for solving this problem, there is known a method in which a polyisobutylene-based sealing material having low contamination is transferred onto a silicone-based sealing material.

  In addition, after the sealing material is applied, it may be necessary to repair the construction portion due to deterioration of the sealing material or the like. At this time, after removing the already-sealed sealing material (advanced sealing material), a new sealing material (advanced sealing material) is applied, but the advanced sealing material may not be completely removed. In some cases, a post-sealing sealant must be spliced to the sealant.

  When inheriting different types of sealing materials as described above, it is common to ensure the adhesion between different types of sealing materials using a primer, and is used when polyisobutylene-based sealing materials are inherited to silicone-based sealing materials. Various compositions are known as primer compositions. For example, saturated carbonization having at least one silicon-containing group having a hydroxyl group or hydrolyzable group bonded to a silicon atom and capable of crosslinking by forming a siloxane bond, characterized by containing an organic titanate ester Examples include a primer composition applied to a sealing material mainly composed of a hydrogen-based polymer (see Patent Document 1).

  However, any of the primer compositions used when a polyisobutylene-based sealant is succeeded to a silicone-based sealant is applied only to a two-pack type sealant. That is, even when these primer compositions are used when a polyisobutylene-based sealant is succeeded to a one-pack type silicone-based sealant, adhesion cannot be ensured and it cannot be practically used. Therefore, in the case where the pre-sealant is a one-pack type silicone sealant, there is no choice but to hand over the silicone sealant whose surrounding is contaminated.

JP-A-11-209701

An object of the present invention is to provide a method capable of succeeding a different sealing material even when the pre-sealing sealing material is a one-pack type silicone sealing material.
Specifically, an object of the present invention is to provide a method for transferring a polyisobutylene sealant to a one-pack type silicone sealant.

  As a result of diligent research regarding the joining of different kinds of sealing materials, the present inventor found that when the adherend surface of the leading sealing material was pretreated with essential oil or a composition containing essential oil, the leading sealing material was a one-pack type silicone. The present inventors have found that a polyisobutylene-based sealing material can be succeeded even with a system-based sealing material, and have completed the present invention.

That is, the present invention includes a step of pretreating an adherend surface of a one-part silicone sealant with an essential oil or a composition containing essential oil, and a step of applying a primer composition to the pretreated adherend surface. And a step of casting a polyisobutylene-based sealing material on the applied primer composition (hereinafter referred to as “the present invention”). This is referred to as “joining method”).
The present invention also provides a method for pretreating the adherend surface of a one-part silicone sealant to which a polyisobutylene sealant is to be inherited with an essential oil or a composition containing essential oil (hereinafter referred to as “pretreatment of the present invention”). Method ").

  In the present invention, the “pretreatment” is a treatment in which an adherent surface of a one-pack type silicone sealant is contacted with an essential oil or a composition containing essential oil (hereinafter sometimes simply referred to as “essential oil”). For example, there is no particular limitation, for example, a process of applying essential oil or the like to the adherend surface, a process of immersing the adherend surface in essential oil, or a process of wiping the adherend surface with a cloth soaked with essential oil or the like Can be mentioned.

  In the present invention, it is preferable that the adherend surface of the one-pack type silicone sealing material is previously washed with an organic solvent.

  In the present invention, the essential oil is preferably at least one selected from the group consisting of monoterpenes, sesquiterpenes and diterpenes, and pinene, limonene, turpentine, farnesene, bisabolen, kazinene, abietane, atisan, More preferably, it is at least one selected from the group consisting of raptan and rosane.

  According to the present invention, a polyisobutylene-based sealing material can be easily succeeded to a one-pack type silicone-based sealing material. Therefore, contamination to the surroundings by the silicone sealant can be prevented, and the appearance is excellent. In other words, the present invention enables the joining of dissimilar sealing materials that could not be achieved conventionally even if the pre-sealing sealing material is a one-pack type silicone sealing material, and is easy and simple in operation. The above utility is very high.

In the present invention, the adherend surface of the one-pack type silicone sealant is pretreated with essential oil or a composition containing essential oil. Thereby, the polyisobutylene-based sealing material can be succeeded to the one-pack type silicone-based sealing material.
First, the joining method of the present invention will be described.
The joining method of the present invention includes a step of pretreating an adherend surface of a one-part silicone sealant with an essential oil or a composition containing essential oil, and applying a primer composition to the pretreated adherend surface. And a step of placing a polyisobutylene-based sealant on the applied primer composition, and a method of transferring the polyisobutylene-based sealant to a one-pack type silicone sealant.

  The reason why the effect of the present invention is achieved by bringing essential oil or the like into contact with the adherend surface of the one-pack type silicone sealant is not clear, but is present in the vicinity of the adherend surface, for example, a silicon atom-oxygen atom bond This is considered to be because the surface to be adhered can be activated and the adherend surface can be activated.

  The essential oil used in the joining method of the present invention is not particularly limited as long as it contains at least one selected from the group consisting of monoterpenes, sesquiterpenes and diterpenes. These terpenes may be acyclic, monocyclic, bicyclic, and tricyclic terpenes, respectively, one-pack type silicone sealant and polyisobutylene sealant (primer composition), Monoterpenes such as pinene (α-pinene, β-pinene), limonene, and terpine; sesquiterpenes such as farnesene, bisabolene, and kazinene; More preferably, it is at least one selected from the group consisting of: Limonene is particularly preferable. The essential oil may be synthesized or a commercially available product may be used.

  In the present invention, “essential oil” refers to a hydrocarbon mixture containing a plurality of terpenes extracted from plants and a compound having the same basic skeleton as terpenes obtained by chemical synthesis.

In the joining method of the present invention, a composition containing the above essential oil can also be used. Examples of the composition include solutions containing essential oils, solids, and the like, and commercially available cleaning agents. As long as these compositions contain essential oils, they may contain additives such as a degreasing agent, a stabilizer, and a solidifying agent.
Although the content of the essential oil in the composition is not particularly limited, for example, it is preferably 1 to 100% by mass and more preferably 10 to 100% by mass with respect to the solid content of the composition.

In the joining method of the present invention, the adherend surface of the one-pack type silicone sealant is pretreated using the above essential oil or the like. Here, the “pretreatment” is not particularly limited as long as it is a process in which the essential oil or the like is brought into contact with the adherend surface of the one-pack type silicone sealant, for example, a process of applying the essential oil or the like to the adherend surface, Examples include a process of immersing the adherend surface in essential oil, a process of wiping the adherend surface with a cloth soaked with essential oil, and a process of applying essential oil.
The pretreatment is preferably a process in which the work is easy and the placement location is not particularly selected, and a process of applying essential oil or the like to the adherend surface or a process of wiping the adherend surface with a cloth soaked with essential oil or the like is preferable. .
The processing method to apply | coat is not specifically limited, For example, the application | coating by spray coating, a brush, etc. are mentioned. The treatment method for applying the essential oil or the like is not particularly limited, and examples thereof include a method for directly applying a solid material such as essential oil to the adherend surface.

In the pretreatment, the treatment after bringing essential oil or the like into contact with the adherend surface as described above is not particularly limited. For example, after making it contact with essential oil etc., the primer composition mentioned later may be applied as it is, the applied essential oil etc. may be wiped off with cloth etc., or it may be dried after making contact.
In the case of using an aqueous solution containing essential oil, it is preferable to wipe off moisture and the like with a cloth or the like because the silicone sealant repels water. In the case of using an organic solution containing an essential oil, any of the above treatments is preferable, and drying is more preferable. When using a solid containing an essential oil, it is preferable to wipe off the solid with a cloth such as a waste cloth.

  In the present invention, before the above-described pretreatment, the adhesion surface of the one-pack type silicone sealing material is previously washed with an organic solvent, water, a cleaning agent, etc. to remove the contamination on the adhesion surface, This is preferable in that it is more excellent in adhesion between the one-pack type silicone sealant and the polyisobutylene sealant (primer composition). The washing method can be performed according to a conventional method.

The silicone sealant pretreated by the joining method of the present invention is not particularly limited as long as it is a cured product of a one-pack type silicone sealant.
Specific examples of the one-pack type silicone sealant include room temperature curable polyorganosiloxane compositions (see JP-A-9-87520, JP-A-9-241510, etc.), antibacterial and antifungal agents. Organopolysiloxane compositions (see JP 2000-256556 A, JP 2001-98154 A, etc.) and the like.
In addition to the above-described sealant composition, commercially available products can be used as long as they are one-pack type silicone sealants. For example, Hamatite SS-310 (manufactured by Yokohama Rubber Co., Ltd.), Tosseal 381 and Tosseal 83 ( All are manufactured by GE Toshiba Silicone Co., Ltd., Sealant 45 (manufactured by Shin-Etsu Chemical Co., Ltd.), SH780 (manufactured by Toray Dow Corning Silicone Co., Ltd.), 8060 Pro (manufactured by Cemedine Co., Ltd.), Pendable (Sharp Chemical) (Manufactured by Co., Ltd.), Petam SR1000 (manufactured by Bridgestone Co., Ltd.), Penguin Seal 2505 (manufactured by Sunstar Giken Co., Ltd.)

  The surface of the one-pack type silicone sealing material to be adhered may be the surface of the already-cured cured body itself, or the surface may be cut to form a new surface to be the surface to be adhered.

  In the present invention, since the adhesiveness between the one-part silicone sealant and the polyisobutylene sealant (primer composition) is excellent, the shape of the adherend surface of the one-part silicone sealant is not particularly limited. For example, when repairing a one-pack type silicone sealing material, the surface to be deposited may or may not be flat.

  In addition, although this invention is the method of handing over to 1 liquid type silicone type sealing material, even if it uses 2 liquid type silicone type sealing material, dissimilar sealing material can be handed over easily and firmly.

The step of applying the primer composition of the joining method of the present invention is a step of applying the primer composition for the post-sealing sealant to the adherend surface pretreated in the pretreatment step according to a conventional method.
The primer composition may be applied by any method as long as it is a regular method, and examples thereof include spray coating and brush coating.

The primer composition for the post-sealing sealant is not particularly limited as long as it is a primer composition for a polyisobutylene-based sealant, and specifically includes, for example, the following compounds (A) to (D): Examples include a primer composition containing 100 parts by mass of (A), 20 to 500 parts by mass of (B), 20 to 250 parts by mass of (C), and 10 to 8000 parts by mass of (D) (Japanese Patent Laid-Open No. 2002). -309163).
(A) Chlorinated polymer (B) Polyisocyanate compound (C) At least one hydrolyzable silyl selected from the group consisting of ketimine groups, oxazolidine groups or amino groups, and polyalkyl silicates Compound having group (D) Solvent

In addition to the primer composition described above, for example, JP-A-8-60027, JP-A-8-60028, JP-A-11-209701, JP-A-11-209702, JP-A-2002-309163, JP-A-2002. Primer compositions described in publications such as 309182 can also be used.
In addition to these, commercially available products can be used as long as they are primer compositions for polyisobutylene-based sealing materials. 90 (manufactured by Yokohama Rubber Co., Ltd.), penguin primer SS-1 and penguin primer SS-2 (both manufactured by Sunstar Giken Co., Ltd.), bond seal primer SR (manufactured by Konishi Co., Ltd.) and the like.

In the joining method of the present invention, after the step of applying the primer composition, a step of placing a polyisobutylene-based sealing material on the applied primer composition is performed.
The method for placing the polyisobutylene-based sealant can be performed according to a conventional method.

  The polyisobutylene-based sealing material to be used is not particularly limited, and may be one-pack type or two-pack type. Specifically, for example, (A) a hydroxyl group bonded to a silicon atom or a hydrolyzable group, and siloxane A room temperature curable composition comprising 100 parts by mass of a saturated hydrocarbon polymer having at least one silicon-containing group that can be crosslinked by forming a bond, and (B) 1 to 500 parts by mass of a water-based paint. (Japanese Patent Laid-Open No. 2000-80306).

In addition to the above-mentioned sealing material, for example, it is described in JP-A-2000-72973, JP-A-2000-95953, JP-A-2001-31874, JP-A-2001-31878, 2002-3735 and the like. Sealing material can also be used.
In addition to these, commercially available products can be used as long as they are polyisobutylene-based sealing materials. For example, Milex-Z (manufactured by Yokohama Rubber Co., Ltd.), epiion-based sealing materials (manufactured by Kaneka Corp.) ), Penguin Seal 7000 (manufactured by Sunstar Giken Co., Ltd.), Bond Xeal IB (manufactured by Konishi Co., Ltd.), Petam IB2000 (manufactured by Bridgestone Corporation), and the like.

  By performing the above steps, the polyisobutylene-based sealing material can be easily and firmly transferred to the one-pack type silicone-based sealing material, which has been impossible in the past. In addition, it is excellent in aesthetics without contaminating the surroundings where the sealing material is inherited.

The pretreatment method of the present invention is a method of pretreating an adherent surface of a one-pack type silicone sealant to which a polyisobutylene sealant is succeeded with an essential oil or a composition containing the essential oil.
In this method, a method of pretreating the adherend surface of the one-pack type silicone sealant with an essential oil or a composition containing the essential oil, a preferred embodiment, etc. will be described in the pretreatment step of the above-described joining method of the present invention. It is the same as that.
According to the pretreatment method of the present invention, it is possible to easily produce an adherend surface that can transfer a polyisobutylene-based sealing material to a one-pack type silicone-based sealing material, which has been impossible in the past.

  The present invention is a method in which a dissimilar sealant is transferred to a one-part silicone sealant, and the one-part silicone sealant is not limited to the one-part silicone sealant used in buildings and automobiles. It can be applied to a one-pack type silicone sealing material used for any purpose.

Hereinafter, the present invention will be described specifically by way of examples. However, the present invention is not limited to this.
<Examples 1-4>
Hamatite SS-310 (manufactured by Yokohama Rubber Co., Ltd.) as a one-pack type silicone sealing material (indicated as “advance sealing material” in Tables 1 to 3) is 7 at room temperature (20 ° C.). Sun-cured to obtain an adherend.
The essential oil shown in Table 1 (both manufactured by Yasuhara Chemical Co., Ltd.) was applied to the adherend surface of this adherend with a brush, left as it was for a while and then air-dried and pretreated.
Thereafter, a primer composition for polyisobutylene-based sealant, Hamatite Primer No. 90 (manufactured by Yokohama Rubber Co., Ltd.) is applied and dried, and then a polyisobutylene-based sealing material, Milex-Z (manufactured by Yokohama Rubber Co., Ltd.) is applied to the surface to which the primer composition is applied. It apply | coated so that an adhesion area might be set to 50 mm x 12 mm (thickness 12 mm), and it was made to cure | harden on the following curing conditions (1) or (2), respectively, and produced two types of test pieces.
Curing conditions (1): 20 ° C, 3 days Curing conditions (2): 20 ° C, 14 days

<Example 5>
As a composition containing essential oil (shown in the column of essential oil components in Table 1), BioCleaner SFF-10TB (commercial Japan Co., Ltd., simply referred to as “Biocleaner” in Table 1). Each test piece was produced in the same manner as in Example 1 except that it was used.

<Example 6>
Each test piece was prepared in the same manner as in Example 3 except that Tosseal 381 (manufactured by GE Toshiba Silicone Co., Ltd.) was used as the one-pack type silicone sealant.

<Example 7>
Each test piece was produced in the same manner as in Example 3 except that Tosseal 83 (manufactured by GE Toshiba Silicone Co., Ltd.) was used as the one-pack type silicone sealant.

<Example 8>
Each test piece was prepared in the same manner as in Example 3 except that sealant 45 (manufactured by Shin-Etsu Chemical Co., Ltd.) was used as the one-pack type silicone sealant.

<Example 9>
Each test piece was prepared in the same manner as in Example 3 except that SH780 (manufactured by Toray Dow Corning Silicone Co., Ltd.) was used as the one-pack type silicone sealing material.

<Example 10>
As Example 1, except that Penguin Seal 2505 (manufactured by Sunstar Giken Co., Ltd., simply referred to as “Seal 2505” in Table 2) was used as the one-part silicone sealant. Each test piece was produced.

<Comparative Example 1>
A polyisobutylene-based sealant was cast on a one-pack type silicone sealant in the same manner as in Example 1 except that no pretreatment was performed (indicated by “-” in Table 3). Each test piece was prepared.

<Comparative Example 2>
Except that toluene was used instead of the essential oil, each test piece was prepared in the same manner as in Example 1 by placing a polyisobutylene sealing material on a one-pack type silicone sealing material.

<Adhesion test>
Using each of the obtained test pieces, a 90 ° peel test was performed according to JIS K6854 to evaluate the fracture state.
The results are shown in Tables 1 to 3. In Tables 1 to 3, “CF” is 100% cohesive failure of the polyisobutylene-based sealant, and “AF” is 100% interfacial failure at the interface between the silicone-based sealant and the primer composition (that is, adhesion) Not).

In each of Examples 1 to 10 and Comparative Examples 1 and 2, except that the surface of the cured one-pack type silicone sealing material was cut off and a new surface was prepared and used as an adherend. The adhesion test was conducted in the same manner as in Examples 1 to 10 and Comparative Examples 1 and 2.
As a result, the adhesion test was the same in all examples, CF in each example, and AF in the comparative example.

Claims (5)

Pre-treating the adherend surface of the one-pack type silicone sealant with an essential oil or a composition containing the essential oil;
Applying a primer composition to the pretreated adherend surface;
A method of casting a polyisobutylene-based sealing material onto a one-pack type silicone-based sealing material, comprising the step of placing a polyisobutylene-based sealing material on the applied primer composition.   The method for transferring a polyisobutylene-based sealing material to a one-component silicone-based sealing material according to claim 1, further comprising a step of previously cleaning an adherend surface of the one-component silicone-based sealing material with an organic solvent.   The said essential oil is at least 1 sort (s) selected from the group which consists of monoterpenes, sesquiterpenes, and diterpenes, The polyisobutylene type sealing material is succeeded to the one-pack type silicone type sealing material of Claim 1 or 2 Method.   The one-component silicone sealant according to claim 1 or 2, wherein the essential oil is at least one selected from the group consisting of pinene, limonene, turpentine, farnesene, bisabolen, kazinene, abietane, atisan, raptan, and losan. A method to transfer polyisobutylene-based sealant to   A method for pretreating an adherent surface of a one-pack type silicone sealant to which a polyisobutylene sealant is succeeded with an essential oil or a composition containing an essential oil.