JPH08100167A - Prevention of stain caused by influence of sealing material and improvement of life of sealing material - Google Patents

Abstract

PURPOSE: To provide a method for preventing an exterior material in contact with a sealing material from being stained, caused by deposition of components in the cured sealing material and improving a life of the sealing material and to provide a method for treating protective coating of the sealing material. CONSTITUTION: This treating method comprises preventing deposition of transfer components caused by deposition of the sealing material by forming an elastic coating film of a resin on the surface of the sealing material or in the vicinity of the surface liable to become a stein factor and improving a life of the sealing material by using the protective coated layer. An elastic unsaturated polyester resin is preferably used in a working joint as a treating agent for coating. An acrylic urethane coating compound is preferably used in a nonworking joint part.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention is applicable to construction work, etc.
It is affected by the migration of the components in the various sealing materials used (breaking-out of oil and fillers in the sealing materials). The present invention relates to a method of preventing contamination on other substrates and improving the service life of the sealing material, which may be a cause of contamination before the contamination as described above. This is a method for preventing contamination and improving the service life of the sealing material by forming a protective coating film on the surface of the sealing material and the surface in the vicinity thereof so as to prevent the contaminants from protruding.

[0002]

2. Description of the Related Art Various rubber products such as silicone / modified silicone / polysulfide / polyurethane sealing materials for construction / civil engineering and vehicles have contaminated the surface of the base material with which they are in contact. Particularly, the contamination of the silicone-based sealing material due to the protrusion of the silicone oil component is remarkable, and the appearance of the building is significantly deteriorated. In the industry, it is called bleed pollution. The degree of contamination differs depending on the type and external shape of the exterior material contacting the sealing material, but the contamination of the exterior material forming the outer wall is particularly unsightly. These are the plasticizers and fillers that are the components in the sealing material.
The oil content migrates to the surface layer due to changes over time, and it is easy to suck in dust and various suspended matter in the atmosphere, and the periphery of the sealing material joint is polluted particularly darkly. Among sealing materials, we would like to use a silicone-based sealing material, which is said to have the best durability, as a waterproof joint material.
The problem of contamination on other materials is a bottleneck, and the places of use are limited. Even if the transferred component of the sealing material is washed away, it will be contaminated immediately within a few weeks. This is because no basic measures have been taken to prevent contamination on the surface of the sealing material and in the vicinity of the surface.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a waterproof joint, a surface of a cured sealing material filled with a sealing material and cured, and a portion contacting with a joint sealing material around the surface. It becomes a cause of rough adhesion. An elastic protective coating is applied to the joints and the surroundings of the joints to remove dust, oil, and protruding components in the sealant, and to prevent contamination of the joint sealant and improve the service life of the sealant. , Is to be solved by applying.

[0004]

[Means for Solving the Problems] As a means for preventing pollution by the sealing material of the present invention and improving the service life of the sealing material, the behavior of the building and the thermal expansion of the sealing material on the surface of the hardened sealing material and around the joints are improved. It is characterized by applying and coating a resin coating film that follows expansion and contraction and stress. In the invention, in order to form an elastic resin coating of the same color as the sealing material or nearly transparent so as to protect the surface of the cured sealing material and the periphery of the joints thereof, first, the surroundings are washed with a detergent or a solvent. To clean. In the case of a silicone-based or modified silicone-based sealing material that causes a rough adhesion loss for forming the protective layer of the sealing material, a specially formulated solvent (methanol 150 parts / methyl ethyl ketone 50 parts / ethyl acetate 50) is used.
Part and trichlene 230 parts), surface treatment is performed to etch the surface of the silicone cured product and the vicinity thereof, and strong adhesion is possible. After being subjected to the above-mentioned surface treatment, its surface has the highest tensile strength, the highest mechanical strength such as burst strength and refractive strength, and the low water absorption and excellent heat and cold resistance. In addition to light stabilizers and antioxidants for unsaturated polyester resin, in order to prevent deterioration due to ultraviolet rays,
It is preferable to coat and coat a polyester resin or an unsaturated polyester resin to which a colorant having the same color as the sealing material (fine powder silica, inorganic pigment, calcium carbonate, talc, etc.) is added. Further, there is no particular requirement for oxidation by ultraviolet rays or the like, and in the case of forming a pollution control protective coating only for the purpose of preventing pollution, a transparent resin substrate is mixed with ultrafine particle glass powder, By applying and coating in the same manner as above, oxidation of the sealing material for a long period of time can be prevented. (Difficult to invade inside due to irregular reflection of ultraviolet rays) In addition, ultra-fine anhydrous silica or glass paogoo is used for the acrylic urethane resin with high transparency and excellent weather resistance and stain resistance at the joint sealing waterproof part of the non-working joint. Even if mixed, its application is preferred for the method of the invention. The application method can be carried out according to a usual method, for example, by means such as brush application or roller application.

[0005]

Next, the present invention will be described in detail with reference to Examples. Example (1) A silicone sealing material joint was applied to an aluminum panel (anodized film) (hue gray). It has been filled with silicone sealing material (hue gray) for 4 days. Step 1 Confirm the cured state of the sealing material, and clean the completely cured surface of the sealing material and the part to be bridged (dressing surface) to the sealing joint. In the case of Example (1), since it is a silicone sealing material,

Cleaning is performed using a specially formulated solvent for the silicone and modified silicone sealants described in US Pat. Step 2 After the cleaning solvent evaporates and dries, bridge the joint sealant and the panel (3 mm
Except for the adherend, attach masking tape. 3rd step As an adhesion assistant primer for unsaturated polyester resin,
A low viscosity compounding solution of acrylic urethane resin was applied to the surface to be adhered, and after a drying open time of 30 minutes to 60 minutes. Fourth Step Next, an unsaturated polyester resin, which has been mixed and adjusted in advance, is applied to the adherend surface. Fifth Step After the application is completed, the curing masking tape is removed before the resin is cured. The coating was performed by a brush coating method while adjusting the viscosity so that the coating thickness of the dried coating layer was about 0.7 mm. In order to judge the above results, after 6 months,
As a result of comparison and judgment of the parts where the sealing material pollution prevention measures were applied and the parts where it was not applied, the panel surface for which no pollution prevention measures were taken was contaminated with a raindrop-like dark black color, but the parts tested were contaminated. None, it was confirmed that there was a clear difference when compared with only dirt due to light and ordinary dust and dust. Also, a sound resin body is maintained without deterioration (cracking or peeling) of the coated body.

Example (2) A modified silicone two-component type (hue black) is applied to a fluororesin-coated (hue white) panel. It is a steel frame building that has been built for 6 months. The area that seems to be contaminated by the sealing material has a raindrop pattern over the entire surface. Step 1 The entire surface of the panel is washed with a detergent mixed with a nonionic surfactant, washed with water and dried. Second step: Cure with a masking tape so as to bridge between the modified silicone joint and the fluororesin coating panel. Third Step Since the fluororesin is non-adhesive, the surface to be adhered including the surface of the modified silicone cured product on the masked tape is cleaned with a trichlene solvent and dried as a clean surface. Fourth step As an adhesion assistant primer for unsaturated polyester resin,
A low viscosity compounding solution of acrylic urethane resin was applied to the surface to be adhered, and after a drying open time of 30 minutes to 60 minutes. Fifth Step Next, the unsaturated polyester resin, which has been mixed and adjusted in advance, is applied to the adhered surface. Sixth Step After the application is completed, the curing masking tape is removed before the resin is cured. The coating was performed by a brush coating method, and the viscosity was adjusted so that the coating thickness of the dried coating layer was about 0.7 mm. In order to judge the above results, after about 5 months have passed after the construction, as in the previous visual inspection results, there is no bleeding contamination due to the sealing material, and there is a slight amount of normal stains (complicated shapes where stains easily accumulate). Part of).

Example (3) It is composed of an acrylic resin (hue white type) finish applied to the exterior wall siding. 1 in the aluminum exhaust gallery part
Sealing is applied with component type silicone (hue clear). In a wooden building that has been built for more than five years, the parts made of silicone are heavily contaminated, and the area around the silicone is particularly contaminated. First step The siding boat is washed with a weak acid detergent, washed with water and dried. Second step The bleeding of the silicone oil component is performed by degreasing and cleaning the remaining oil portion and the surface of the cured silicone body with a specially formulated solvent to remove the silicone oil. Wait for the solvent to evaporate and dry. Third Step Acrylic urethane (clear) resin is applied and dried on the surface of the cured silicone body which has been degreased and washed and whose surface has been activated. The coating was performed by a brush coating method so that the thickness of the dried coating layer was about 0.4 mm. In order to judge the above results, after about 5 months have passed,
As a result of visual inspection, no contamination was found on the outer wall of the site where the silicone sealing material was applied. The acrylic urethane resin film coated and coated did not peel or crack, and remained a sound resin body.

[0008]

According to the present invention described above,
The outer wall, which was contaminated due to the influence of the sealing material, was repeatedly subjected to maintenance by cleaning several times a year, but with an easy coating method, the contamination of the outer wall due to the influence of the sealing material can be prevented for a short time. . New or existing structures can be easily constructed. It is possible to prevent the contamination by the sealing material, which occupies the largest weight of the contamination such as the outer wall, by the construction before the completion. Since the factor of contamination by the sealing material is eliminated, the cleaning maintenance cycle of the outer wall and the like can be reduced. Since the elastic resin body is used as a protective layer to coat and coat the sealing surface and its vicinity, the service life of the sealing material can be greatly improved. In particular, unsaturated polyester resin has a large tensile elastic modulus such as tear strength and impact strength, and is a strong resin, and it is also possible to follow the behavior of the building together with the elastic sealing material that can follow the behavior and chemical stability. It also has good resistance to heat and cold, and it is preferable to use it as a protective coating material to prevent the contamination of joints and seals of buildings under harsh conditions and to improve the service life. Then, the coating coating of an acrylic urethane coating having good transparency, weather resistance, adhesion performance and stain resistance is also useful, and the object of the present invention can be sufficiently achieved. Not only sealing materials for buildings, but also rubber products such as molded sealing materials for vehicles, etc. can be seen to cause a lot of pollution. It can also be applied as a coating agent to prevent contamination and deterioration of molded sealing materials, and is an industrially effective means especially for the purpose of preventing contamination by sealing materials during glass glazing, regardless of vehicles or structures. By forming a protective layer for preventing contamination and deterioration of various sealing materials by a simple coating method, the service life of the sealing material can be improved, and maintenance costs can be reduced.

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Claims (2)

[Claims] 1. A method of treating a cured sealing material, which comprises forming an elastic resin coating film on the surface of the cured sealing material and the surface in the vicinity thereof to prevent contamination by the sealing material. 2. A method for treating the elastic resin coating film according to claim 1, which comprises kneading a light stabilizer, super-particulate glass powder or the like with the elastic resin coating film to improve the service life of the sealing material or the like.