JP2007270519A - Method of finishing surface of sealing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple method of finishing the surface of a sealing material to prevent the surface of the sealing material from being polluted and a method of finishing the surface of the sealing material having weather resistance and durability. <P>SOLUTION: In this method of finishing the surface of the sealing material, after the sealing material is installed, a film formed mainly of a fluororesin is stuck on its surface and finished. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a surface finishing method for a sealing material applied to the construction field and the like, and more particularly, to a surface finishing method for a sealing material that can prevent contamination of a surface on which a highly elastic sealing material is placed.

  Conventionally, in the construction field, in order to improve the airtightness and waterproofness of outer walls and exterior materials, or by providing adhesiveness between different types of members such as glass and window frames, window frames and panels, Various sealing materials are applied for fixing and further imparting vibration absorption. However, there is a problem that plasticizers, fillers, oils, and the like in the sealing material are deposited on the surface layer due to changes over time, adsorbing dust and various suspended matters in the atmosphere, and darkly contaminating.

  In addition, these sealing materials are excellent in waterproofness and airtightness, but the surface where the filled sealing material such as the joints are exposed remains sticky, so that contaminants such as dust and dust over time. There is also a problem that adhesion easily occurs and generation of wrinkles is observed, resulting in a difference in dirt between the surface of the sealing material and the surroundings, which impairs the beauty.

Therefore, in order to prevent contamination by the sealing material and improve the service life of the sealing material, an elastic resin coating is formed on the surface of the sealing material, and a method and sealing for preventing the contamination due to the influence of the sealing material A method for improving the service life of a material has already been filed (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 8-100187 (page 1-4)

  If the surface of the sealing material or the surface of the coating film is sticky or elastic, the surface tends to become dirty due to the stickiness and elasticity.

  In addition, the method of forming a new resin coating on the surface of the sealing material requires a finishing process on the surface of the sealing material, a painting process, a drying process, and curing, and many processes are required. Absent.

  Furthermore, when painting the surface of the sealing material, a primer called reverse primer is applied to the surface of the sealing material to prevent the migration of plasticizers and improve the adhesion between the sealing material and the coating film. Painting is done. It is necessary to use a dedicated reverse primer depending on the type and type of the sealing material. However, it is very difficult to identify the type of sealing material when it is applied for the purpose of renovation after a long period of time has passed since construction of the sealing material, and it is also difficult to select a dedicated reverse primer. is there.

  In view of the above problems, an object of the present invention is to provide a simple surface finishing method for preventing contamination of the surface of a sealing material, and further to provide a surface finishing method for a sealing material having weather resistance and durability. It is.

  In order to achieve the above object, the invention according to claim 1 is a surface finishing method for a sealing material in which a film mainly composed of a fluororesin is attached to the surface of the sealing material after the sealing material is placed. It is said.

  According to the invention according to claim 1 having the above-described configuration, it is a simple surface finishing method that does not require new painting or curing, simply pasting a film mainly composed of a fluororesin after the sealing material is placed. Further, it becomes possible to prevent the surface of the sealing material from being soiled, and the life of the sealing material can be dramatically improved.

  In the invention according to claim 2, the sealing material is selected from a silicone resin, a modified silicone resin, a polyester urethane resin, an acrylic urethane resin, a polysulfide resin, and a polyisobutylene resin, and is composed of a solvent-soluble and highly non-volatile resin. It is characterized by being.

  According to the invention according to claim 2 having the above-described configuration, various sealing materials that have a feeling of film thickness due to a high non-volatile content, have excellent fleshiness, and are adapted to the respective materials of each building can be easily used. It is possible to obtain a surface finishing method capable of preventing contamination by a simple method.

  The invention according to claim 3 is characterized in that the film is a fluororesin film having an extensibility of 300% or more at 20 ° C. and having a very flexible film thickness of 10 μm or more.

  According to the invention according to claim 3 having the above configuration, since it is a film having flexibility to follow the deformation and expansion and contraction of the building, even if the sealing material expands and contracts, it does not break or peel off, and is airtight. Waterproofness can be maintained.

  The invention according to claim 4 is characterized in that an ultraviolet absorber that shields 90% or more of ultraviolet rays having a wavelength of 350 nm or less is added to the film.

  According to the invention according to claim 4 having the above-described configuration, since ultraviolet rays are prevented from entering the sealing material, deterioration due to ultraviolet rays can be prevented.

  The invention according to claim 5 is characterized in that a hydrophilic layer containing a photocatalyst exhibiting hydrophilicity having a contact angle with water of 20 ° or less is applied to the film.

  According to the invention according to claim 5 having the above-described configuration, the surface of the sealing material exhibits hydrophilicity and is hardly subject to environmental pollution, and it is also possible to exhibit a deodorizing function and an antibacterial function by photocatalysis. .

  According to the present invention, since the sealing material surface finishing method is a method of sticking and finishing a film mainly composed of a fluororesin on the surface after placing the sealing material, it is a simple method that does not require painting or curing. Further, it is possible to obtain a surface finishing method for a sealing material that can prevent the surface of the sealing material from being soiled and can dramatically improve the service life of the sealing material.

  Hereinafter, embodiments of a surface finishing method for a sealing material according to the present invention will be described in detail.

  In the construction field, a sealing material is bonded to the outer surface of the outer wall or the exterior material, the gap between the members, or the joint in order to improve the airtightness and waterproofness of the outer wall and the exterior material. Therefore, the performance required for the sealing material is that it is water-impermeable as a waterproof material, has good adhesion to various members, has elasticity and does not break or peel, and has weather resistance and durability. In addition, it is resistant to contamination with contamination resistance, good workability, safe and environmentally friendly, and the like.

  For this purpose, silicon resin-based sealing materials with excellent weather resistance, heat resistance, and durability, acrylic resin-based sealing materials that have elasticity after curing, urethane resin-based sealing materials that exhibit rubber elasticity after curing and do not contaminate concrete, Various sealing materials, such as a polysulfide resin-based sealing material that can be applied to glass and exhibit high rubber durability after curing, have been developed.

  By simply filling the gaps or joints between the outer wall and exterior materials with sealing material, the plasticizer, filler, oil, etc. in the sealing material will precipitate on the surface layer over time, causing dust in the atmosphere and various Adsorbs floating substances and may contaminate darkly. Furthermore, there is a problem that the surface of the sealing material itself is easily soiled due to the elasticity and the stickiness of the surface.

  Therefore, in order to protect the surface of the sealing material, a coating layer is also formed. If it is this structure, after hardening of a sealing material, the protective coating layer of a sealing material can be formed by apply | coating a predetermined thickness and drying a resin coating material.

  However, when applying resin paint, a process of applying a primer to the surface of the sealing material and a process called “curing” to prevent the paint from being placed on unnecessary parts are necessary. If a process and a drying process are added, it becomes a complicated construction process, and a simpler surface finishing method is required.

  Furthermore, when an elastic paint is applied, since it is soft until the coating film is dried, dirt may adhere in the time until the coating film is dried and cured.

  Therefore, in the method of the present invention, a sealing material surface finishing method is adopted in which after the sealing material is placed, a film containing a fluororesin as a main component is attached to the surface and finished. Since the film is solid, no dirt adheres to it, and no curing is required. Therefore, the construction process is simple and the construction time can be shortened.

  The sealing material may be any of solvent-soluble resins selected from silicone resins, modified silicone resins, polyester urethane resins, acrylic urethane resins, polysulfide resins, and polyisobutylene resins. All of these resin components have a high non-volatile content, are excellent in meat retention, and have a film thickness feeling, and are therefore suitable as a sealing material.

  As the film mainly composed of a fluororesin, for example, a fluororesin film having an extensibility of 300% or more at 20 ° C. and having a film thickness of 10 μm or more is preferable. Can be pasted as it is. Moreover, what is necessary is just to stick using the adhesive agent which has the same elasticity or elongation rate as the sealing material, when affixing on the old sealing material which has already been laid.

  If the film affixed on the sealing material has high extensibility, it can easily follow expansion and contraction due to deformation or thermal expansion of the building, so that it does not break or peel even if the sealing material expands or contracts. The covering state of the sealing material can be maintained. If the film thickness is 10 μm or less, the film strength is weak and easily broken, and thus there is a tendency that the protection of the substrate tends to be insufficient, and the film thickness is preferably 10 μm or more. .

  In addition, the fluororesin film to be attached only needs to be directly attached to an elongated film having a width corresponding to the width of the sealing. Therefore, a new painting process, a drying process, and curing are not required, and the surface of the sealing material can be prevented from being soiled by a simple method that shortens the construction process. Furthermore, since it is a flexible film that follows the deformation of buildings and the expansion and contraction of the sealing material, it does not break or peel off, can maintain airtightness and waterproofness, and improve the life of the sealing material Can do.

  Further, if an ultraviolet absorber that shields 90% or more of ultraviolet rays having a wavelength of 350 nm or less is added to the film, the ultraviolet rays are prevented from entering the sealing material, so that deterioration of the sealing material due to ultraviolet rays is prevented. This is preferable. The ultraviolet absorber may be benzotriazole, benzophenone, or hindered amine, and the substance is not particularly limited.

  Furthermore, if a hydrophilic layer containing a photocatalyst exhibiting hydrophilicity with a water contact angle of 20 ° or less is applied to the film, the surface of the sealing material exhibits hydrophilicity and is less susceptible to environmental pollution. Furthermore, the deodorizing function and the antibacterial function can be exhibited by the photocatalytic action.

  As the photocatalyst, for example, titanium oxide is preferably applicable. If a coating containing titanium oxide is applied to a fluororesin film, the surface not only exhibits a photocatalytic function, but also has a contact angle with water. Also exhibits hydrophilicity of 20 ° or less. The surface exhibiting hydrophilicity not only prevents fogging but also has a function of making it difficult to get dirt. In particular, the hydrophilicity due to the photocatalytic action is superhydrophilic with a contact angle with water of 5 ° or less, and the effect of preventing contamination is enormous.

  That is, according to the finishing method described above, the surface of the sealing material exhibits hydrophilicity and is hardly subject to environmental pollution, and it is also possible to exhibit a deodorizing function and an antibacterial function by a photocatalytic action.

  In addition, a fluororesin film is applied to a sealing material with excellent weather resistance, heat resistance, and durability, and a hydrophilic layer is applied. be able to.

  As described above, according to the surface finishing method of the sealing material according to the present invention, since the sealing material surface finishing method is performed by attaching a film mainly composed of a fluororesin on the surface after the sealing material is placed. The surface of the sealing material can be prevented from being stained by a simple method that does not require new painting or curing.

  In addition, the film is made of a highly extensible and flexible film, added with an ultraviolet absorber, and coated with a hydrophilic layer, so that the sealing material does not deteriorate and the life of the sealing material is dramatically increased. Can be improved.

  That is, the surface finishing method of the sealing material according to the present invention is a simple finishing method that can shorten the construction process, can prevent the surface of the sealing material from being soiled, and protects the sealing material over a long period of time. It is a surface finishing method that enables a long life.

Claims (5)

  A method for finishing a surface of a sealing material, characterized in that, after the sealing material is placed, a film mainly composed of a fluororesin is attached to the surface of the sealing material and finished.   The sealant is selected from a silicone resin, a modified silicone resin, a polyester urethane resin, an acrylic urethane resin, a polysulfide resin, and a polyisobutylene resin, and is composed of a solvent-soluble and highly non-volatile resin. 2. A surface finishing method for a sealing material according to 1.   The surface of the sealing material according to claim 1 or 2, wherein the film is a fluororesin film having an extensibility of 300% or more at 20 ° C and having a film thickness of 10 µm or more. Finishing method.   The surface finishing method for a sealing material according to any one of claims 1 to 3, wherein an ultraviolet absorber that shields 90% or more of ultraviolet rays having a wavelength of 350 nm or less is added to the film. The surface finish of the sealing material according to any one of claims 1 to 4, wherein a hydrophilic layer containing a photocatalyst exhibiting hydrophilicity having a contact angle with water of 20 ° or less is applied to the film. Method.