JP2010234350A - Method of repairing and finishing damaged or degraded surface of molding of enamel and fiber reinforced plastic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for regenerating a repair surface which improved the odor of enamel and FRP (Fiber Reinforced Plastic) molding and shortened a construction period. <P>SOLUTION: In the durable type repairing and regenerating method, the surface of the enamel and FRP molding aged with time is washed by a detergent and then polished by a diamond pad to remove an aged weak layer and fixed foreign matters, fine damages are removed, then surface polishing and polish finishing are performed using a natural compound, and thus a beautiful surface state similarly to the one of a new product is restored. Further, by applying hard and strong alkoxysilane-based inorganic coating material to the surface, a glass-like surface state is attained and the beautiful surface is continuously maintained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for repairing and regenerating a surface when a surface of a bathtub, a dressing table, a kitchen appliance, a FRP molded product, or the like is damaged, deteriorated or contaminated.

  In hotels, inns, commercial buildings, and detached houses, bath products such as bathtubs and dressing tables and FRP molded products that have been used for many years have damage, surface deterioration, and foreign matter sticking, so it is very expensive to replace them with new products. In addition to the construction period, industrial waste was also generated.

  Instead of replacing with a new product, as a relatively easy method, in order to maintain the surface of these substrates aesthetically, a repair coating finish is made with epoxy resin paint, polyurethane resin paint, modified silicone resin paint, room temperature drying type fluorine resin paint, etc. Has been used extensively.

  However, this method has problems such as odor, fire and environmental pollution due to a large amount of solvent scattering at the finish of painting, and it generally takes several days to reuse the paint to obtain sufficient drying and curing. It was. In addition, since it is usually spray-painted, noise from compressors is often a problem.

  In the case of paint finish, usually bathrooms and kitchens use a lot of water and hot water, and the atmosphere is high in humidity, and the moisture is severely affected. Therefore, problems such as deterioration of surface gloss, swelling and peeling over time. Could also occur.

  As a method of aesthetically covering the scratches and dirt on the surface, painting finish is generally performed, but it can be used for odor and air pollution due to solvent scattering during painting, noise from construction equipment, and reuse of bathrooms and vanities. Problems such as the relatively long days required, and the use conditions of bathtubs and vanities that are strongly affected by moisture may cause poor coating adhesion, swelling, and peeling over time. A fundamental solution is needed.

  Therefore, it is important not to replace the aging and the FRP product over time, and to avoid the heavy use of solvents by organic paints as in normal paint finish, and noise discomfort from the coating equipment is also undesirable. Furthermore, it is also important to improve the influence of the coating film on the adhesive strength due to the action of water such as hot water, cold water and high humidity over time.

  In order to solve these problems, the surface of the flaws and FRP products with damage and deterioration, and the adherent adhering surface is modified to a smooth and glossy surface, not a finish using paint, A construction method that regenerates a hard surface that is not easily damaged is desired.

  In addition, a surface finish that does not bulge or peel even when affected by moisture over time is required.

  In conventional bathtubs and dressing tables using FRP products, in order to restore aesthetics without replacement, paint and fresh methods are generally used. Since the aging defects that occur on the surface become a problem, attention was paid to a finishing method capable of surface regeneration and modification by combining surface smooth regeneration by polishing and surface coating with fine damage.

  It is important to use materials that contain as little solvent as possible in polishing operations and surface coating processes with fine damage, as well as safety and pollution measures.

  The surface-adhering foreign matter contains invisible oils and fats, water scale, metal powder, etc., and is removed using a neutral detergent or a weakly acidic detergent before polishing.

  Using a diamond pad (No. 800 to No. 3000), the surface fragile layer due to fine scratches and aging is polished and removed. Depending on the degree of damage, the surface roughness of the diamond pad is changed from large to fine, and the surface is made smooth. In general, the roughness of the diamond pad is initially no. About 800 is desirable. It is preferable to use 3000 to finish the polishing.

  A natural compound that is further baked with silicic acid and made into a fine ceramic in order to make the surface smooth and smooth by polishing with a diamond pad, in order to make it a shiny and clear surface similar to the surface of new products and FRP products. Is used to finish and polish to obtain a clear and high gloss surface.

  Even if the surface is clear and highly glossy, a prescription that does not cause damage or surface deterioration relatively early with time is important for maintaining durability. This is because a general coating film is relatively easily damaged and improves the problem of poor adhesion due to moisture action.

  Focusing on alkoxysilane coating materials, which are the same siliceous material as cocoons and have a strong siloxane bond, as a method of glassy integration with the cocoon surface. Thus, the surface finish is performed by forming a thin film layer on the surface while filling the concave portion of the minute damage. By this finishing regeneration method, a protective layer having the same quality as the soot can be formed.

  For FRP molded products, surface polishing and compound finishing are performed in the same way as cocoon products. However, because they are molded products based on organic polymers, they are more susceptible to scratches and surface deterioration due to aging. It is effective to modify hard and robust.

  In order to satisfy this requirement, as in the case of cocoons, an alkoxysilane coating material, which is a siliceous substance that forms a siloxane bond, is used as a surface durable protective layer by a buffing finishing method, even for fine damage and recesses. A method of forming a thin film layer on the surface while filling was used.

  Since the alkoxysilane-based coating material is crosslinked and cured by condensation reaction in the presence of moisture, when the thick film coating is performed, the crosslinking reaction of the entire coating film is delayed, curing is insufficient, and a robust coating film is not formed. For this purpose, a coating method in which an alkoxysilane coating material is buffed immediately after application with a brush or a sponge roller and spreads on a thin film while filling in a concave portion or a damaged portion is important.

  Next, with respect to the upper edge of the bathtub, inorganic compounds including calcareous materials contained in tap water are likely to dry and deposit when used over time, which may be undesirable in terms of aesthetics. As an improvement measure, deposition of an inorganic compound can be improved by partially applying a room temperature curing type fluorine resin paint or acrylic silicon resin paint around the upper edge of the bathtub.

  Next, examples of the present invention will be described. In addition, the difference was confirmed using the commercial item corresponding to the conventional construction method as a comparative example.

  In Example (1-1), a bathtub used for 10 years or more was cut to about 5 × 10 cm, cleaned with a commercially available neutral detergent and tap water, diamond pads (No. 800 to No. 1500) and (No. 3000) was then used for polishing, and then a natural compound material (commercial product “Polished Master”) was used for polishing.

  Example (1-2) was prepared by using an alkoxysilane-based coating material (trade name “Seven Silane Coat” manufactured by Seven Chemical Co., Ltd.) on the test specimen prepared in the same manner as in Example (1-1). It was hung and coated.

In Example (1-3), 120 g / m ^{2 of an} alkoxysilane-based coating material was applied to a test specimen prepared in the same manner as in Example (1-1) by roller coating.

  In Example (2-1), a specimen was prepared in the same manner as in Example (1-1) for an FRP bathtub that had been used for 5 years or more.

  In Example (2-2), a FRP bathtub that had been used for 5 years or more was prepared by cleaning, polishing, and coating a surface alkoxysilane in the same manner as in Example (1-2).

  In Example (2-3), the same test sample as in Example (2-2) was applied by thinly applying the top coat of Comparative Example (3-1) once with a short-haired commercial roller. It was.

  Since Comparative Example (3-1) is finished by a conventional method, a commercially available epoxy resin-based undercoating paint (Product name “Seven Metal Primer” of Seven Chemical Co., Ltd.) and polyurethane resin-based overcoating paint (Product name of Seven Chemical Co., Ltd.) Using "Cera Seven Top UE-H"), the spray finish was performed.

  Next, test results of Examples and Comparative Examples are shown in Table-1 and Table-2.

  As a result of visual confirmation, each of the examples and comparative examples had a glossy feeling and were in a refreshed state.

  In the water resistance test-1, each specimen was dried at 20 ° C. for 24 hours, immersed in fresh water for 24 hours, taken out, and the surface state was observed. Although Example (1-3) had a slight cloudiness tendency, all the examples were good. In Comparative Example (3-1), which is generally used, a swelling phenomenon was observed, and there was a problem if it was affected by moisture at the time when drying and curing were insufficient.

  In the water resistance test-2, each test body was sufficiently dried for 7 days and was immersed in clean water for 24 hours, but both the examples and the comparative examples were good. Therefore, it was confirmed that if the drying period after the construction was sufficiently secured, the conventional method could be used.

  The hot water test was performed in order to confirm resistance to warm water by immersing the test body in hot water maintained at 95 to 100 ° C. for 72 hours. Although it was good in each example, in Comparative Example (3-1) of the conventional construction method, swelling, peeling, etc. occurred, and it was inferred that there was a problem in the use conditions of the bath and water heater.

  In the carbon contamination test, a black liquid mixed with 10 parts by weight of carbon pigment with 90 parts by weight of water was applied to the surface of each test specimen, wiped with a cloth after 24 hours, and the surface was observed. In Examples, Examples (1-2), (1-3), and (2-2) in which an alkoxysilane-based coating was applied after polishing finish were good, but Examples (1-1) with only polishing finish were used. ) And (2-1) were slightly stained. In Comparative Example (3-1) using the paint, a little dirt was still seen. This confirmed the effect of the alkoxysilane-based coating.

  About the odor at the time of construction, although there was no problem in the examples for each test body, in the comparative example (3-1) of the conventional construction method with paint finish, the solvent odor was confirmed on the test specimen creation day and the next day, After all it was understood that there was a problem.

  In Test result-2, in order to see the deposition of inorganic impurities contained in tap water, water droplets were dropped on the surface of the test specimen, dried for one month, and then wiped with a sponge. In the situation after lightly wiping, a slightly good result was obtained when the thin film of the alkoxysilane coating of Example (2-3) was coated with a fluorine resin paint. Therefore, it was estimated that the method of Example (2-3) was also effective for the remaining water droplets.

  As a result of the above results, as a repair / reconstruction method after aged use of bath products and FRP molded products used in bathtubs, dressing tables, etc., as a method that can drastically improve the problems of the refresh method with conventional paint, The result that the composite construction method of the alkoxysilane inorganic coating material was useful was obtained.

The invention's effect

According to the present invention, as described above, the composite construction method combining the polishing finish using a diamond pad and a natural compound and the buffing of an alkoxysilane-based coating material can be reused early after construction without any odor problems. Repair and reproduction of products and FRP products became possible.
Practically, refreshing work such as bathrooms, restrooms, kitchens, etc. could be done in a short time, and there was no unpleasant solvent odor and excellent durability.

Claims (2)

  Surface damage and surface degradation of existing flaws or existing FRP moldings are scaled and polished with a diamond pad and natural compounding agent, and then an inorganic coating material based on alkoxysilane is polished with a polisher Thin film coating method.   After surface damage and surface degradation, the surface of the mold or FRP molded product was scaled and polished using a diamond pad and a natural compounding agent, and then an inorganic coating material based on alkoxysilane was coated in a thin film with a polisher. In addition, a method of coating a room temperature drying type fluororesin paint.