JP2009298998A - Humidity curing-type coating material for floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor surface coating material in which flaws into the material deeply are not caused and to which unremovable dirt is not attached when floor surfaces of factories, etc. are coated with the material. <P>SOLUTION: The material is produced by adding an organic aluminum compound as a curing catalyst to a condensate of methyltrichlorosilane with dimethyldimethoxysilane. The condensate is preferably produced by condensing 2 or more equivalents of dimethyldimethoxysilane with 1 equivalent of methyltrichlorosilane and has a methoxysilyl group at its molecule terminal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a floor coating material to be painted on a floor surface of a building, and particularly to a coating material suitable as a coating material for a passage surface through which a vehicle such as a forklift truck passes in a building such as a factory.

  Conventionally, various floor coating materials have been proposed to prevent the floor surface of a building from being soiled and to keep the floor surface beautiful. For example, those disclosed in Japanese Patent Application Laid-Open Nos. 2004-176442 and 2004-123982 are known.

  These are the design and durability against chemical substances, the adhesion and removal of dirt, and the feel of the foot when walking on the floor as the interior of the building. It was considered in consideration.

  However, in a building such as a factory, a vehicle such as a forklift enters the building and carries in and out raw materials and products, so that dirt easily adheres to the floor surface as the vehicle travels.

  Especially in the factory, the vehicle repeatedly turns at a steep angle along a narrow passage, and the tire is often suspended on the floor surface, and the paint on the floor is damaged or dirty by the tire. There are many.

In particular, when the tire is fixed, or when the tire is strongly rubbed against the floor surface due to sudden start or braking, the coating material will be deeply scratched, and the carbon of the tire will be embedded in the scratch, Very unsightly stains are produced. Such dirt is deep and cannot be removed by wiping or scraping the surface.
JP 2004-176442 A JP 2004-123982 A

  The present invention has been made in view of such circumstances, and it is applied to a floor surface of a factory or the like so that the floor surface does not have the above-described scratches or deep stains. The object is to provide a coating material.

  Thus, the floor coating material of the present invention is characterized in that an organoaluminum compound is added as a curing catalyst to a condensate of methyltrichlorosilane and dimethyldimethoxysilane.

  In the present invention, it is preferable that the condensate is a product obtained by condensing 2 equivalents or more of dimethyldimethoxysilane with 1 equivalent of methyltrichlorosilane and having a methoxysilyl group at the molecular end.

  According to the present invention, since an organoaluminum compound is added as a curing catalyst to the condensate of methyltrichlorosilane and dimethyldimethoxysilane, it cures at room temperature with moisture in the air and forms an extremely hard film.

  The resulting film is a silicone-based film, which has a high hardness because it has a dense structure. Therefore, excessive frictional resistance is generated even when a vehicle tire is mounted on the film. Without any damage to the film.

  Also, even if there are some scratches, the high altitude of the film prevents the tires from spreading or deepening due to the friction of the tires, so that unremovable dirt does not penetrate deeply.

  The condensate of methyltrichlorosilane and dimethyldimethoxysilane in the present invention is a relatively low molecular weight oligomer having a Si—O—Si bond condensed by dehydrochlorination from methyltrichlorosilane and dimethyldimethoxysilane. .

  In the present invention, when 1 equivalent of methyltrichlorosilane is condensed with 2 equivalents or more of dimethyldimethoxysilane, chlorine in methyltrichlorosilane is completely detached, and a methyl group and It is thought that the methoxy group is contained in a form directly bonded to silicon.

  More preferably, 3 equivalents of dimethyldimethoxysilane are condensed with 1 equivalent of methyltrichlorosilane. As a result, chlorine is more completely eliminated, and the terminal can have more methoxy groups.

  Since this oligomer has a low molecular weight, it is liquid in itself. Therefore, it is possible to paint with a thin film thickness without adding a diluent, and various problems due to the solvent in painting do not occur.

Since the oligomer molecule has a methoxysilyl group (≡Si—O—CH ₃ ), demethyl alcohol reaction is caused by moisture in the air by the reaction shown in the following chemical formula 1, and ≡Si—O— Si≡ bond is formed and cured.

  As the catalyst for promoting the curing, organometallic compounds such as titanium and aluminum, and acid and amine compounds are used. In the present invention, an organoaluminum compound is used as the curing catalyst. As a result, the hardness of the coating film is high, the wear resistance is excellent, and it is difficult to be damaged.

  A paint comprising 90% by weight of a condensate consisting of 1 equivalent of methyltrichlorosilane and 3 equivalents of dimethyldimethoxysilane and 10% by weight of an organoaluminum compound (DX-9740) as a curing catalyst was prepared. An acrylic urethane paint was applied to the flexible board, and the paint was applied to the surface of the paint.

  As a comparative example, use a commercially available wet curable urethane paint for floors (trade name Floor Top Markless (Comparative Example 1) and trade name Boudintex Mark Top (Comparative Example 2)) and apply directly to the flexible board. Then, it was compared with that of the above example.

[Test items]
Film thickness: compliant with JIS K5600-1-7 magnetic method.
Surface hardness: Conforms to JIS K 5600-5-4 pencil method.
Adhesion strength: compliant with JIS K 5600-5-6 cross-cut method.
Water resistance: According to JIS K 5600-1-6, in tap water at room temperature for 7 days.
Abrasion resistance: compliant with JIS K 5600-5-9 wear wheel method.
Chemical resistance: Conforms to JIS K 5600-6-1.

[Test results]
The test results are shown in Table 1.
In addition, “kata” in the table indicates that when a chemical is dropped on the surface of the test piece and wiped after a predetermined time has passed, traces of the chemical dropped on the trace are visually recognized, but other noticeable alteration, discoloration, deformation, etc. States that is not allowed.

Claims (2)

Moisture-curing floor coating material comprising an organoaluminum compound added as a curing catalyst to a condensate of methyltrichlorosilane and dimethyldimethoxysilane The moisture-curable floor coating material according to claim 1, wherein the condensate condenses 2 equivalents or more of dimethyldimethoxysilane with 1 equivalent of methyltrichlorosilane and has a methoxysilyl group at the molecular end.