JPH02189372A - Prevention of sticking of paper - Google Patents

Abstract

PURPOSE:To make it possible to form inexpensively a coating film excellent in applicability, retention of an ability to prevent sticking of paper and stain resistance by coating the surface of a structure with a topcoating material containing a specified graft copolymer and an aggregate. CONSTITUTION:A topcoating material is obtained by mixing 1-60 pts.wt. graft copolymer obtained by partially radical-polymerizing a silicone macromonomer or a fluorocarbon marcromonomer with 1-40 pts.wt. aggregate which is a powder of a particle diameter of 0.1-3.0mm selected from among a natural stone powder, its processed product, a natural fiber powder, and a synthetic resin powder and optionally a resin component, an extender pigment, a coloring pigment, an addition and a solvent. The surface of a structure such as a wall surface of a building, a fence, a wall, a utility pole, a pedestrian bridge or a gate post is coated with the topcoating material to form a nonsticky coating film having many protrusions thereon, thus preventing the sticking of paper thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for preventing paper from being pasted onto the surface of a structure.

[Prior Art] In general, advertisements and other posters pasted on the surface of buildings spoil the aesthetic appearance, and it takes time and money to remove them.

As a method for preventing pasting, a pasting prevention method has been known in which a paint containing ffIW4 oil is applied to the surface of a structure. Additionally, a method of preventing pasting has been devised in which the surface of the structure is coated with silicone resin paint or fluororesin paint.

[Problems to be Solved by the Invention] However, in the conventional method of preventing stickers using lubricating oil-containing paints, the lubricating oil on the surface of the coating is washed away by rain, etc., which reduces the sticker prevention function and damages the coating surface. There is a problem of contamination.

Furthermore, the method of preventing pasting by applying silicone resin paint or fluororesin paint has the problem that the paint is very expensive and difficult to implement.

Therefore, the purpose of the present invention is to solve the above-mentioned conventional problems, and to form a coating film that is easy to apply, has an excellent long-lasting pasting prevention function, has good stain resistance, and is relatively inexpensive. The purpose of this invention is to provide a new method for preventing pasting.

[Means for Solving the Problems] The means of the present invention for achieving the above-mentioned object is to partially radical copolymerize a silicone-based macromonomer or a fluorine-based macromonomer on the surface of a construct that prevents pasting. Graft Copolymers The following graft copolymers are used in this sense. ) and aggregate to form a non-adhesive coating surface with a large number of protrusions.

The surfaces of the structures are areas on which advertisements, posters, etc. are pasted, such as building walls, fences, telephone poles, pedestrian bridges, gates, etc. As the graft copolymer (graft copolymer) which is a component of the top coating, a conventional commercially available product is used. The method for producing this graft copolymer is disclosed in Japanese Patent Application Laid-Open No. 59-2037.
Publication No. 88, JP-A-60. It is known from the publication No.-123518. The molecular structure of this graft copolymer consists of a side chain polymer component that provides non-stick properties and a main chain polymer component that helps form a coating film.

The above-mentioned aggregates are 0) Natural stone powder such as kansui stone, silica sand, vermiculite, perlite, etc. or processed products thereof, @ Natural fiber powder such as wood flour, rice husk powder, cotton flour, bulb powder, etc. (c) Synthetic resin powders such as silicone resin, fluororesin, polyethylene resin, polystyrene resin, acrylic resin, and vinyl chloride resin are used. The aggregate has a particle size of 0.1 to 3.
Particle powder of about 0ae+ is adopted.

The top coat contains 1 to 60 parts by weight of a graft copolymer and 1 to 40 parts by weight of aggregate. In addition, resin components for coating film formation, extender pigments, coloring pigments, additives, and solvents are added to the top coat as necessary. The top coat paint is applied by roller, spray, brush, etc. The top coat is applied after applying the base coat if necessary.

During the drying process of the top coat, the graft copolymer is oriented on the surface of the coat. Is this because the graft copolymer is a side chain polymer component, a silicone component that reduces the surface free energy of the coating film, or a fluoride component? This is because it has a ruquil component. Since these side chain polymer components have good non-adhesive properties, the formed coating film exhibits good adhesive-preventing properties and adhesive removability.

Since the main chain polymer component of the graft polymer has film-forming properties, it can be used alone as a film-forming resin for paints. In addition, when blended with ordinary film-forming resins for paints, the main chain polymer component of these graft copolymers has good affinity with the film-forming resin for paints, so it forms a strong graft copolymer on the surface of the paint film. Form a layer of polymer. Since this graft copolymer layer is not easily washed away by rain or the like, the non-stick properties of the coating film can be maintained for a long period of time. In addition, since it is difficult to adsorb dust, it has good stain resistance.

[Work 1 The graft copolymer provides non-stick properties to the coating.

The aggregate rises above the paint surface and makes the paint surface uneven.

The non-adhesive property and the uneven surface enhance the prevention of pasting.

[Example] Next, examples of the present invention will be described together with comparative examples.

Example 1 Transparent Laughton Sealer (synthetic resin clear paint, manufactured by Suzuka Paint Co., Ltd., trade name) was applied as an undercoat onto an asbestos straight board using a bristle roller at an application area of 100 g/lJt, and dried for 1 hour. I let it happen.

Next, an aggregate-containing acrylic urethane resin paint with the composition shown in Table 1 above and Aron G5-30 (silicone graft copolymer solution, solid content 20%, Toagosei Chemical Co., Ltd.)
A topcoat paint with a weight ratio of 120,715 (manufactured by product name) was prepared, and applied with a bristle roller to an application ratio of 30 (1/bottom).

Then, what was dried for 24 hours was used as a test plate.

The coating thickness of the test plate was approximately 100 to 300 μm.

Advertising imitation paper was attached to the test board using starch glue, woodworking adhesive (vinyl acetate emulsion adhesive), and cellophane tape, and after being left indoors for 24 hours, the removability of the imitation paper was evaluated.

Furthermore, after exposing test plates prepared using the same method outdoors for one month, imitation paper was pasted in the same manner and left indoors for 24 hours, and the removability of the imitation paper was evaluated, as well as the contamination state.
Contamination removability was also evaluated at the same time. The evaluation results are shown in Table 2.

Example 2 In Example 1, Aron G was used instead of Aron G5-30.
F-150 (fluorine-based graft copolymer solution, solid content 2
A test plate was prepared and evaluated in exactly the same manner as in Example 1, except that 0%, manufactured by Toagosei Chemical Industry Co., Ltd. (trade name) was used. The evaluation results are shown in Table 2.

Comparative Example 1 A test plate was prepared and evaluated in exactly the same manner as in Example 1, except that Aron G5-30 was not used.

Comparative Example 2 In Example 1, Aron G5-30 was replaced with 311-
200 (mold release silicone oil, manufactured by Toray Silicone KK, trade name) was added at a ratio of 3 parts by weight to 120 parts by weight of the aggregate-containing acrylic urethane resin paint, and was used as a top coat. Test plates were prepared and evaluated in exactly the same manner as in Example 1.

(continued on next page) 2 tables In addition, the evaluation of the sticker prevention property in Table 2 is ◎: Cannot be pasted. O: Peel off naturally B: Easy to remove by hand Δ: Cannot be removed easily ×: Paper and adhesive remain on the painted surface after peeling off Judgment was made based on the criteria.

The evaluation in Table 2 shows that the test plates of Examples 1 and 2 could not be pasted with stickers and had good stain resistance.

[Effects of the Invention] As described above, in the present invention, by using a top coat containing a graft copolymer and an aggregate, the coating film is given non-adhesive properties and surface unevenness, and long-term prevention of pasting is achieved. This makes it possible to provide a coating film with good adhesiveness (non-adhesion). Therefore, it is impossible or difficult to paste advertisements or other posters on the surface of the structure in which the present invention is implemented. Therefore, even if it is pasted, it is temporary and can peel off naturally or simply be peeled off.

The graft copolymer used in the present invention exhibits sufficient anti-adhesion properties when used in a relatively small amount with respect to ordinary film-forming resins in topcoat paints, so it can be used in combination with conventional silicone resins for the purpose of preventing pasting. It becomes possible to provide a sticker-preventing coating film that is cheaper than other paints or fluororesin-based paints.

Furthermore, the present invention allows coating film formation to be carried out by ordinary coating means and is easy to implement.

Claims (1)

[Claims] (1) The surface of the structure to prevent pasting is coated with a top coat containing aggregate and a graft copolymer made by partially radical copolymerizing a silicone macromonomer or a fluorine macromonomer. A method for preventing pasting, characterized by forming a coating surface that has convexities and is non-adhesive.