JP2006088122A - Artificial marble - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hardly cause soiling and easily remove the soiling stuck on the marble. <P>SOLUTION: The artificial marble is manufactured by applying an acrylic urethane based coating material containing a siloxane based water repellent agent as a water repellent component on the artificial marble comprising a synthetic resin and inorganic filler. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an artificial marble made of a synthetic resin, and more particularly to an artificial marble that is used in a water portion and has an antifouling function.

  In recent years, artificial marble mainly composed of thermosetting resin such as vinyl ester resin, acrylic resin, polyester resin or synthetic resin of thermoplastic resin has been known for its excellent physical properties and high-class feeling. And widely used as a kitchen top.

  As an artificial marble, a resin composition in which an inorganic filler such as aluminum hydroxide is added to the above resin is often used, and this resin composition is formed to a predetermined thickness and has a predetermined size according to the application. After cutting, the portion corresponding to the decorative surface is polished and used as necessary.

  The artificial marble produced in this way has been commercialized and widely used in wash counters, kitchen counters, bathtubs, wash bowls and the like.

  Here, when artificial marble products are used in a field called water around toilets, bathtubs, kitchens, etc., dirt due to use, contamination due to detergents, dirt due to food, oil, cosmetics, etc. are likely to adhere and cleaning. Even if it was difficult to remove the dirt even after cleaning, there was a situation where the dirt could not be removed. For these reasons, the appearance of artificial marble having high antifouling performance that is difficult to get dirty and easy to remove is currently desired.

  By the way, natural marble is usually used as a stone with moderate gloss on the surface, and therefore, artificial marble also resembles natural marble, so that the surface is moderately glossy or patterned. In order to polish it. When the surface of the artificial marble is polished, the inorganic filler contained in the resin matrix is exposed on the surface, and the inorganic filler exposed on the surface often has hydrophilicity and lipophilicity, When various liquid pollutants adhere to the surface of the artificial marble decorative board, there is a problem that the liquid pollutants permeate the interface between the resin and the inorganic filler and dirt which is difficult to fall off adheres. Further, this inorganic filler has a drawback that it is easily affected by chemicals such as bleach.

In addition, in order to improve the contamination resistance of the surface of the artificial marble, Patent Document 1 discloses that the surface of the artificial marble is chemically bonded with a silane-based surfactant containing a fluorocarbon group.
JP 2001-190344 A

  The present invention has been invented in view of the above-described conventional problems, and an object of the present invention is to provide an artificial marble that hardly causes dirt and that can easily remove attached dirt.

  In order to solve the above-mentioned problems, the artificial marble according to the present invention is characterized in that an acrylic urethane-based paint containing a siloxane-based water repellent as a water repellent component is applied to an artificial marble made of a synthetic resin and an inorganic filler. It is what.

  With such a configuration, the antifouling coating film made of an acrylic urethane-based paint containing a siloxane-based water repellent as a water repellent component prevents the inorganic filler from being exposed on the surface. It is strong, not affected by seasonings and detergents, and has improved water repellency, so it has excellent stain resistance and is less likely to cause stains. Is possible. For these reasons, long-term antifouling performance can be maintained.

  Moreover, it is preferable to mix | blend fluorine powder with the acrylic urethane type coating material containing the siloxane type water repellent applied to artificial marble.

  By adopting such a configuration, in addition to the above effects, oil repellency is improved and antifouling performance is further improved.

  Moreover, it is preferable to mix | blend a silica powder with the acrylic urethane type coating material containing the siloxane type water repellent applied to artificial marble.

  By setting it as such a structure, the surface glossiness can be easily adjusted by adjusting the compounding quantity of a silica powder.

  The surface of the artificial marble is difficult to stain, is resistant to acids and alkalis, is not affected by seasonings and detergents, and the attached dirt is easy to remove. Can maintain long-term antifouling performance.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  The artificial marble in the present invention is formed of a synthetic resin (thermosetting resin or thermoplastic resin) and inorganic powder. The synthetic resin is preferably one or more selected from vinyl ester resins, acrylic resins and polyester resins, and the inorganic powders are calcium silicate, talc, kaolin, clay, silica, calcium carbonate, aluminum hydroxide, water Although magnesium oxide, barium sulfate, calcium sulfate, etc. are mentioned, it is not particularly limited, but among those exemplified above, aluminum hydroxide is preferable, and aluminum hydroxide trihydrate, that is, gibbsite is more preferable. Used for. Since gibbsite is close to the bending rate of methyl methacrylate polymer, it provides excellent transparency and contributes to imparting heat resistance and flame retardancy to artificial marble formed as a hydrate characteristic. The average particle size of the inorganic powder is preferably 0.1 to 100 μm, and more preferably 0.5 to 80 μm.

  The ratio of the polymer to the inorganic powder in the artificial marble matrix, that is, the ratio of the synthetic resin to the inorganic powder is preferably 100 parts by mass of the synthetic resin: 50 to 500 parts by mass of the inorganic powder. Additives such as a colorant and a pattern material can be added to the synthetic resin as necessary. As the colorant, any dyes such as dyes, organic pigments, inorganic pigments and the like, which are usually used for resin moldings containing inorganic powder with artificial marble, can be used. Examples of the pattern material include organic resin particles or inorganic particles. Examples of the organic resin include methyl methacrylate resin, polystyrene, polyvinyl chloride, polyester, epoxy resin, and polyvinyl alcohol. Examples thereof include marble particles, silica, mica and the like. The maximum dimension of these particles is preferably 10 mm or less, and more preferably 5 mm or less.

  The artificial marble (artificial marble decorative board) of the present invention is subjected to surface polishing as necessary after molding. Then, it has the coating layer which apply | coated the acrylic urethane type coating material containing the water repellent on at least one surface. In order to improve water repellency as described above, a water repellent is included, and a siloxane water repellent is used as the water repellent.

  In addition, a fluorine resin or a fluorine powder may be further blended in an acrylic urethane paint containing a siloxane water repellent applied to artificial marble for oil repellency.

  Furthermore, in order to adjust the surface gloss, the coating film can be blended with inorganic powder such as silica or fluorine powder as a powder component. These powder components are preferably 5 to 70 parts by weight with respect to 100 parts by weight of the resin component in the paint. If there are few silica powder components, gloss will become large, and if there are few fluorine-type powders, an oil-repellent effect will be small and gloss will become large. When there are too many silica powder components and fluorine-based powders, the resin component is insufficiently bonded, which causes a decrease in the adhesion strength of the coating film. These powders preferably have an average particle size of about 0.1 to 50 μm. If the average particle size is less than 0.1 μm, the powder is too small and lacks dispersibility, and if it exceeds 50 μm, the powder is too large to form a coating film.

  When adding design properties to the paint film, colorants such as pigments and pattern materials may be added to the paint film, and when emphasizing designs that make use of the background of the artificial marble matrix, colorants and pattern materials may be added. It is also possible to make a clear coating without adding.

  The thickness of the coating is preferably about 1 to 100 μm, and if the coating thickness is less than 1 μm, the coating film may be too thin and a coating film defect may occur. The texture may be damaged.

  The artificial marble of the present invention configured as described above is coated with an acrylic urethane-based paint containing a siloxane-based water repellent as a water-repellent component on the artificial marble. In this case, it can be easily removed simply by wiping.

  In particular, when an acrylic urethane paint is blended with a siloxane-based water repellent as a water repellent component and a fluorine powder as an oil repellent component, aqueous and oily stains are difficult to adhere, and there are cases where stains adhere. It can be removed simply by wiping.

  Examples of the present invention and comparative examples will be described below.

Example 1
200 parts by mass of aluminum hydroxide (“CW-308B” manufactured by Sumitomo Chemical Co., Ltd.) is blended with 100 parts by mass of vinyl ester resin (“Prominate P-311” manufactured by Takeda Pharmaceutical Co., Ltd.), and a curing agent ( An appropriate amount of “Percure WO” manufactured by Nippon Oil & Fats Co., Ltd. was added and mixed with a stirrer to prepare a resin composition.

  This resin composition was defoamed under reduced pressure at 2666 Pa (20 Torr) for 30 minutes, poured into a mold, and the mold was heated at 90 ° C. for 70 minutes to cure the resin composition. A thick flat artificial marble was obtained.

  After polishing the surface of this flat artificial marble, after spraying an acrylic urethane coating containing a siloxane-based water repellent as a water repellent component to an average coating film of 20 μm, and drying at room temperature, Cured at 70 ° C. for 20 minutes.

(Example 2)
Average coating film of flat artificial marble molded and polished in the same manner as in Example 1 by spraying, and an acrylic urethane paint containing a siloxane water repellent as a water repellent component and a fluorine powder as an oil repellent component After applying to 20 μm and drying at room temperature, it was cured at 70 ° C. for 20 minutes.

(Example 3)
Average coating film of flat artificial marble molded and polished in the same manner as in Example 1 by spraying, and blending acrylic urethane paint containing siloxane-based water repellent as water repellent component and silica powder as gloss adjusting agent After applying to 20 μm and drying at room temperature, it was cured at 70 ° C. for 20 minutes.

(Comparative Example 1)
A flat artificial marble molded and polished in the same manner as in Example 1 was prepared, and the one that was not painted as it was was used as Comparative Example 1.

  For the artificial marbles of Examples 1 to 3 and Comparative Example 1 obtained as described above, curry and blue ink were applied to the surface as contaminants and then left for a day. Then, this product was evaluated for water washability when washed with tap water and washability when washed with neutral detergent, and the remaining condition of the pollutants was visually scored according to the following five steps to prevent contamination. Performance evaluation was performed. The results are shown in Table 1.

  5 = pollutants are completely removed. 4 = There is very little contaminant left. 3 = Slightly noticeable with contaminants remaining. 2 = Contaminant remains and stands out. 1 = Almost no contaminants are removed.

  As is clear from Table 1, the samples of Examples 1, 2 and 3 are higher in both water washability and detergency than Comparative Example 1, and contain a siloxane water repellent as a water repellent component. It was found that the artificial marbles of Example 1, Example 2 and Example 3 coated with the acrylic urethane-based paint had high water washability and high washability and were excellent in antifouling performance.

Claims (3)

  An artificial marble obtained by applying an acrylic urethane paint containing a siloxane water repellent as a water repellent component to an artificial marble made of a synthetic resin and an inorganic filler.   2. The artificial marble according to claim 1, wherein fluorine powder is blended with an acrylic urethane paint containing a siloxane water repellent applied to the artificial marble.   2. The artificial marble according to claim 1, wherein silica powder is blended with an acrylic urethane paint containing a siloxane water repellent applied to the artificial marble.