JP2014163196A - Coating floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating floor excellent in an appearance and a finely dressing characteristic, having sufficient strength and durability even in a single layer, and without requiring labor for construction.SOLUTION: A coating floor material of blending a polyolefin bead with a binder resin, is formed by coating, and its surface roughness Ra is regulated to 0.1 μm-0.5 μm. A blending rate of the polyolefin bead in the coating floor material is desirably 2 pts.mass-15 pts.mass per 100 pts.mass of the binder resin. The polyolefin bead is also desirably an ultrahigh-molecular weight polyethylene bead of an average molecular weight of 1 million-6 millions.

Description

  The present invention relates to a painted floor.

As floors and stairs (hereinafter sometimes collectively referred to as “floor”) of facilities such as various factories, synthetic resin and substantially non-conductive coated floors are widely used.
The characteristics of such a coated floor include that there is no seam and is safe and easy to clean, that dust from the ground such as concrete can be prevented, and that the beautification can be added to the floor by coloring or painting.

The synthetic resin-based coating floor is dried after a coating floor material including, for example, a base binder resin or a coloring material is applied on the base, and the binder resin is a curable resin such as an epoxy resin. It is formed by a curing reaction.
As the coating floor material, for example, a sink type coating floor material is generally used. The sink type coating floor material is mainly composed of a curable binder resin such as an epoxy resin, and basically contains no solvent or a small amount of solvent. It is a type of flooring material that is spread and applied (spreading pan), and can be applied to a thickness of, for example, about 0.5 to 2 mm by a single application.

An ordinary general paint floor made of the above-mentioned sink type paint floor material has a certain level of resistance to a load that is enough for an operator or the like to walk or a relatively light carriage to travel. doing.
However, when the coating floor is a floor of a factory that has introduced transportation means such as an automatic transport vehicle, a forklift, or a reach fork, the coating floor receives a high load from tires of the transportation means in particular, Or there is a problem that dust or the like is likely to be generated from a ground such as exposed concrete or the like due to local wear and loss in a specific area where an operator or the like frequently passes.

  Therefore, the coating material is mixed with inorganic aggregates such as river sand, quartz sand, alumina, emery, corundum, etc., and a large number of convex portions based on the aggregates are formed on the surface of the coating floor, thereby forming the coating material. It has been proposed to improve the strength and durability of the floor (Patent Documents 1, 2, etc.).

Japanese Patent Laid-Open No. 11-92194 Japanese Utility Model Publication No. 6-74736

Since all the inorganic aggregates have a specific color, when such aggregates are blended, the appearance characteristics that are one of the characteristics of the painted floor are affected. That is, there is a problem that the coated floor cannot be colored in an arbitrary color tone such as a light color due to the influence of the color of the aggregate.
Moreover, the unevenness | corrugation of the coating floor surface becoming large by mix | blending an aggregate and a glossiness lose | eliminate is also one of the causes by which the cosmetics appearance of the said coating floor falls.

  Moreover, in order to improve the strength and durability by forming a large number of convex portions on the surface of the painted floor, it is effective to make the aggregate unevenly distributed in the vicinity of the surface of the painted floor or to be exposed to the surface. is there. However, since the inorganic aggregate has a larger specific gravity than the binder resin, it tends to sink downward in the coating film of the coating floor coated on the base, so that the aggregate is unevenly distributed near the surface of the coating floor as described above, It is not easy to expose the surface.

When a mortar method capable of highly filling an aggregate is adopted, a large number of the aggregates can be present near the surface and exposed to the surface. However, the mortar method requires a special tool such as a mortar mixer, and there is a problem that it takes more work than a sink-type coating floor material.
As described in Patent Document 2, it is conceivable that the coated floor has a laminated structure of two or more layers, and among them, aggregate may be blended in the outermost layer, but the number of layers increases by adopting the laminated structure. There is a problem that it takes time and effort for construction.

  An object of the present invention is to provide a coated floor which is excellent in appearance and appearance, has a sufficient strength and durability even with a single layer, and does not require labor for construction.

The present invention is a coating floor formed by applying a coating floor material in which polyolefin beads are blended into a binder resin, and having a surface roughness Ra of 0.1 μm or more and 0.5 μm or less.
According to the present invention, instead of the conventional inorganic aggregate, by using polyolefin beads having a specific gravity smaller than that of the binder resin, the polyolefin beads are coated on the base based on the difference in specific gravity. It can be floated upward in the coating film of the flooring material and can be unevenly distributed in the vicinity of the surface of the coating floor made of the coating film or exposed to the surface.

Therefore, while suppressing the blending ratio of the polyolefin beads and maintaining the state of the flooring material at the level of the sink type, as many protrusions as possible are formed on the surface of the floor to be formed, Strength and durability can be improved.
The polyolefin beads are usually colorless, transparent, translucent, or white, so that the coated floor can be colored in an arbitrary color tone.

In addition, by setting the surface roughness Ra of the coated floor to 0.5 μm or less, it is possible to suppress the unevenness of the surface of the coated floor from becoming large and eliminating the gloss.
Therefore, it is possible to improve the appearance of the painted floor.
The surface roughness Ra of the coating floor is limited to 0.1 μm or more. When the surface roughness is smaller than this, the number of convex portions formed on the surface of the coating floor by polyolefin beads is limited. This is because the effect of improving the strength and durability of the coating floor cannot be obtained due to the shortage.

On the other hand, by setting the surface roughness Ra of the coated floor to 0.1 μm or more and 0.5 μm or less, the strength and durability of the coated floor can be maintained while maintaining the surface gloss and ensuring good cosmetics. Can be improved.
In the present invention, the surface roughness Ra is a roughness curve defined in Japanese Industrial Standard JIS B0601: 2001 “Product Geometric Characteristics Specification (GPS) —Surface Properties: Contour Curve Method—Terminology, Definition, and Surface Property Parameters”. It is expressed by the arithmetic average roughness Ra.

The blending ratio of the polyolefin beads in the coating floor material is preferably 2 parts by mass or more and 15 parts by mass or less per 100 parts by mass of the binder resin.
When the blending ratio is less than the above range, although depending on the average particle diameter of the polyolefin beads and the coating amount per unit area of the coating floor, the surface roughness Ra of the coating floor becomes less than 0.1 μm, and the coating floor There is a possibility that the effect of improving the strength and durability of the coated floor may not be obtained due to the insufficient number of convex portions formed on the surface.

On the other hand, when the above range is exceeded, the surface roughness Ra of the coated floor exceeds 0.5 μm, depending on the average particle diameter of the polyolefin beads, the coating amount of the coated flooring, and the like. There is a possibility that the unevenness becomes large, the gloss is lost, and the appearance is lowered.
On the other hand, by setting the blending ratio of the polyolefin beads in the above range, the surface roughness Ra of the coated floor is 0.1 μm or more, although it depends on the average particle diameter of the polyolefin beads and the coating amount of the coated floor material. When the thickness is 0.5 μm or less, the strength and durability of the coated floor can be improved while maintaining the gloss of the surface and ensuring good appearance.

The polyolefin beads are preferably ultra high molecular weight polyethylene beads having an average molecular weight of 1 million or more and 6 million or less.
Such ultra high molecular weight polyethylene beads are tough and particularly excellent in wear resistance and impact resistance, so that the strength and durability of the coated floor can be further improved.
The reason why the average molecular weight of the ultrahigh molecular weight polyethylene is preferably in the above range is as follows.

  That is, if the average molecular weight is less than 1,000,000, the effect of further improving the strength and durability of the coated floor by using the ultra-high molecular weight polyethylene beads described above may not be sufficiently obtained. On the other hand, it is difficult to synthesize ultra high molecular weight polyethylene having an average molecular weight exceeding 6 million, and even if it can be synthesized, it is difficult to process it into beads. And may increase the cost of the coated floor.

On the other hand, the use of ultra high molecular weight polyethylene beads having an average molecular weight in the above range reduces the strength and durability of the coated floor without reducing the productivity of the beads and coated floor material. This can be further improved.
In the present invention, the average molecular weight of the ultrahigh molecular weight polyethylene is expressed by the viscosity average molecular weight measured by the intrinsic viscosity method (ASTM-D4020).

  According to the present invention, it is possible to provide a coated floor that is excellent in appearance and beauty, has a sufficient strength and durability even with a single layer, and does not require labor for construction.

<Coated floor>
The coated floor of the present invention is formed by applying a coated floor material in which polyolefin beads are blended in a binder resin, and has a surface roughness Ra of 0.1 μm or more and 0.5 μm or less.
The reason why the surface roughness Ra of the coated floor is limited to the above range is as follows.

That is, when the surface roughness Ra is less than 0.1 μm, the number of convex portions formed on the surface of the coating floor by the polyolefin beads is insufficient, and the effect of improving the strength and durability of the coating floor cannot be obtained. On the other hand, when the thickness exceeds 0.5 μm, the unevenness of the surface of the coated floor becomes large, the gloss is lost, and the appearance is lowered.
On the other hand, by setting the surface roughness Ra of the coated floor to 0.1 μm or more and 0.5 μm or less, the strength and durability of the coated floor can be maintained while maintaining the surface gloss and ensuring good cosmetics. Can be improved.

In consideration of further improving this effect, the surface roughness Ra is preferably 0.12 μm or more, and preferably 0.4 μm or less, even in the above range.
The coated floor of the present invention may have a laminated structure of two or more layers, such as forming a layer made of a coating floor material blended with the polyolefin beads after forming some underlying layer on the ground. In view of the fact that the construction does not take time as described above, it is preferable to have a single-layer structure consisting of only the layer formed by applying the coating floor material directly on the base.

<Coating floor material>
(Binder resin)
The binder resin is preferably a two-component curable resin, a moisture curable resin, a radical polymerizable resin, or the like that can be cured and reacted at about room temperature (5-35 ° C.) without requiring heating, particularly in field construction.

In consideration of minimizing the amount of the solvent to be blended in the coating floor material or omitting the blending of the solvent, the binder resin is preferably a liquid resin that exhibits a liquid state before curing.
Examples of the curable binder resin include one or more of epoxy resin, urethane resin, acrylic resin, polyester resin, vinyl ester resin, and the like.

  In particular, high strength and durability are imparted to the painted floor, making it less likely to be worn or lost locally in the specific areas described above, and reducing the amount of solvent to be mixed into the painted floor as much as possible. For example, a liquid epoxy resin, particularly a liquid two-component curable epoxy resin that can be mixed with a curing agent and allowed to undergo a curing reaction is preferable.

(Polyolefin beads)
As the polyolefin beads, various kinds of polyolefin beads such as fine particulate polyethylene beads, polypropylene beads, or modified products thereof, which are provided as functional waxes for paints, coatings, and inks, are preferably used. .
In particular, ultra high molecular weight polyethylene beads having an average molecular weight of 1 million or more and 6 million or less are preferable.

Such ultra high molecular weight polyethylene beads are tough and particularly excellent in wear resistance and impact resistance, so that the strength and durability of the coated floor can be further improved.
The reason why the average molecular weight of the ultrahigh molecular weight polyethylene is preferably in the above range is as follows.
That is, if the average molecular weight is less than 1,000,000, the effect of further improving the strength and durability of the coated floor by using the ultra-high molecular weight polyethylene beads described above may not be sufficiently obtained. On the other hand, it is difficult to synthesize ultra high molecular weight polyethylene having an average molecular weight exceeding 6 million, and even if it can be synthesized, it is difficult to process it into beads. And may increase the cost of the coated floor.

On the other hand, the use of ultra high molecular weight polyethylene beads having an average molecular weight in the above range reduces the strength and durability of the coated floor without reducing the productivity of the beads and coated floor material. This can be further improved.
In consideration of further improving this effect, the average molecular weight of the ultra-high molecular weight polyethylene beads is preferably 2 million or more even in the above range, and preferably 5 million or less.

  Examples of such ultra-high molecular weight polyethylene beads include Hi-Z Million (registered trademark) 145M (average molecular weight: 1.15 million, average particle size: 150 μm), 240S (average molecular weight: 2 million, average particle size: manufactured by Mitsui Chemicals, Inc.) 120 μm], 240 M (average molecular weight: 2.4 million, average particle size: 160 μm), 320 MU (average molecular weight: 3.2 million, average particle size: 150 μm), 340 M (average molecular weight: 3.4 million, average particle size: 155 μm), manufactured by the same company MIPERON (registered trademark) XM-220 (average molecular weight: 2 million, average particle size: 30 μm), XM-221U (average molecular weight: 2 million, average particle size: 25 μm), PM-200 (average molecular weight: 1.8 million, Average particle size: 10 μm], Sunfine (registered trademark) UH951 manufactured by Asahi Kasei Chemicals Corporation [average molecular weight: 4.5 million, average particle size] : 120μm], and the like.

  The surface roughness Ra of the coating floor is arbitrarily changed by adjusting the average particle diameter of the polyolefin beads, the blending ratio to the coating floor material, and the coating amount per unit area of the coating floor material. be able to. Therefore, when the predetermined blending ratio and application amount are set, the average grain suitable for forming the coated floor having the predetermined surface roughness Ra in the range of 0.1 μm or more and 0.5 μm or less as described above. One or more kinds of polyolefin beads having a diameter are preferably selected from the polyolefin beads.

The blending ratio of the polyolefin beads is preferably 2 parts by mass or more and 15 parts by mass or less per 100 parts by mass of the binder resin.
When the blending ratio of the polyolefin beads is less than the above range, the surface roughness Ra of the coating floor is less than 0.1 μm, although depending on the average particle diameter of the polyolefin beads or the coating amount of the coating floor as described above, There is a possibility that the effect of improving the strength and durability of the coated floor may not be obtained because the number of convex portions formed on the surface of the coated floor is insufficient.

On the other hand, when the above range is exceeded, the surface roughness Ra of the coated floor exceeds 0.5 μm, depending on the average particle diameter of the polyolefin beads, the coating amount of the coated flooring, and the like. There is a possibility that the unevenness becomes large, the gloss is lost, and the appearance is lowered.
On the other hand, by setting the blending ratio of the polyolefin beads in the above range, the surface roughness Ra of the coated floor is 0.1 μm or more, although it depends on the average particle diameter of the polyolefin beads and the coating amount of the coated floor material. When the thickness is 0.5 μm or less, the strength and durability of the coated floor can be improved while maintaining the gloss of the surface and ensuring good appearance.

In consideration of further improving this effect, the blending ratio of the polyolefin beads is preferably 4 parts by mass or more, and preferably 10 parts by mass or less even in the above range.
(Other)
For the coating floor material, a curing agent for further curing the binder resin, a solvent for adjusting the viscosity and fluidity for applying the coating floor material, for example, a sink, a reactive diluent, Various additives such as a toner for coloring the coating floor to be formed can be blended at an appropriate ratio.

Among these, as the curing agent, when the binder resin is an epoxy resin, various curing agents capable of curing the epoxy resin can be used.
Examples of the curing agent include aliphatic amines such as diethylenetriamine and triethylenetetramine, and modified products thereof, aromatic amines such as m-phenylenediamine and diaminodiphenylmethane, and modified products thereof, phthalic anhydride, hexahydrophthalate, and the like. Examples thereof include one or more acid anhydrides such as acid anhydride and pyromellitic acid anhydride, polysulfide, acid amide, thiocol, and the like.

The toner is obtained by pulverizing the colorant together with a binder resin in order to improve the dispersibility of the colorant such as a pigment in the coating floor material.
In addition, since the coating floor of this invention is substantially nonelectroconductive as demonstrated previously, suppose that various electroconductivity imparting agents are not included (excluded) as said additive.
(Coating flooring)
When the binder resin is a two-component curing type epoxy resin that is cured by reaction with a curing agent as described above, the conductive coating floor material is composed of a main agent in which polyolefin beads are blended with the epoxy resin, and the curing agent. It is preferable to configure as a two-component type, and to mix the main agent and the curing agent at a predetermined ratio at the construction site and apply them on the base.

<Example 1>
(Main agent)
As the binder resin, a two-component curable liquid epoxy resin [jER (registered trademark) 828 manufactured by Mitsubishi Chemical Corporation, viscosity at 25 ° C .: 12 to 15 Pa · s, epoxy equivalent: 184 to 194] is used. It was.

As the polyolefin beads, Hi-Zex Million (registered trademark) 240S (ultra high molecular weight polyethylene beads, average molecular weight: 2 million, average particle size: 120 μm) manufactured by Mitsui Chemicals, Inc. was used.
Further, SET T-26 manufactured by Mikuni Dye Co., Ltd. was used as the toner.
100 parts by mass of the epoxy resin is mixed with 2 parts by mass of polyolefin beads, 10 parts by mass of toner, and 20 parts by mass of benzyl alcohol as a solvent, and a stirrer [Haydon (registered trademark) Three-One Motor manufactured by Shinto Kagaku Co., Ltd. ] Was mixed at 1200 rpm to prepare a base material of a sink type coating floor material.

(Curing agent)
As a curing agent, Daito Sangyo Co., Ltd. trade name Daitokural X-6045 was used.
(Sample preparation)
The main agent and the curing agent were blended so that the blending ratio of the curing agent per 100 parts by mass of the epoxy resin in the main agent was 45 parts by mass, and mixed to prepare a sink type coating floor material.

Next, the coating floor material is cast on a slate plate as a base using a gold trowel so that the coating amount per unit area is 1100 ± 10 g / m ^2, and then cured to form a single layer. A sample of a painted floor with a structure was prepared.
<Comparative example 1>
Except that the polyolefin beads were not blended in the main agent, the main agent and the curing agent of the coating floor material were prepared in the same manner as in Example 1 to prepare a sample of the coating floor.

<Examples 2 to 4, Comparative Examples 2 and 3>
The mixing ratio of the polyolefin beads in the main agent is 1 part by mass (Comparative Example 2), 4 parts by mass (Example 2), 10 parts by mass (Example 3), 15 parts by mass (100 parts by mass per 100 parts by mass of the epoxy resin in the main agent. Except that it was changed to Example 4) and 30 parts by mass (Comparative Example 3), the base material and the curing agent of the coating floor material were prepared in the same manner as in Example 1 to prepare a sample of the coating floor.

<Example 5>
As polyolefin beads, instead of Hi-Zex Million 240S, Sunfine (registered trademark) UH951 (average molecular weight: 4.5 million, average particle size: 120 μm) manufactured by Asahi Kasei Chemicals Co., Ltd. was used. Except for blending 10 parts by mass per part, the base material and the curing agent of the coated floor were prepared in the same manner as in Example 1 to prepare a coated floor sample.

<Surface roughness measurement>
The surface shape of the surface of the sample of the coated floor prepared in each of the above examples and comparative examples was measured using a surface roughness meter (Surface Comb (Surfcom (registered trademark) 130A) manufactured by Tokyo Seimitsu Co., Ltd.) Evaluation curve: 3.2 mm, measurement speed: 0.3 mm / second, cut-off value: 0.8 mm, inclination curve, straight line correction, measurement of roughness curve described above from the results of 300 cut-off ratios The arithmetic average roughness Ra was determined. The measurement was performed at any 10 locations on the surface of one sample, and the median value (Median) was defined as the surface roughness Ra of the sample.

<Beauty assessment>
The 60 ° glossiness of the surface of the coated floor sample prepared in each of the above Examples and Comparative Examples was measured using a gloss meter [PG-1 manufactured by Nippon Denshoku Industries Co., Ltd.]. The measurement was carried out at any 10 locations on the surface of one sample, and the median value (Median) was used as the glossiness of the sample.

Good gloss with a gloss of 77 or higher (◎), good gloss with less than 77 and with a gloss of 66 or more (◯), beautiful with no gloss of less than 66 Assessed as poor sex (x).
<Strength and durability evaluation>
The weight loss of the coated floor samples prepared in each of the above Examples and Comparative Examples is shown in Japanese Industrial Standard JIS K5600-5-9: 1997 “Paint General Test Method—Part 5: Mechanical Properties of Coating Film—Section 9 : Abrasion resistance (wear wheel method) ”was evaluated by the wear wheel method (Taber abrasion test).

That is, in the measurement, CS-17 was used as a wear wheel, and a weight loss of 980 N was obtained after applying a load of 9.8 N (mg).
And those with a weight loss of 60 or less are very good in strength and durability (、), those over 60 and 72 or less are good in strength and durability (◯), those over 72 are poor in strength and durability (×) As evaluated.

<Comprehensive judgment>
The surface roughness Ra is in the range of 0.1 μm or more and 0.5 μm or less, and the appearance, strength, and durability are both evaluated as (）). The surface roughness Ra is very good. Is in the above-mentioned range, and the cosmetics, strength and durability are evaluated as (（) and (（), or both are good (○), and the surface roughness Ra is out of the above range. In addition, and / or any one of the evaluations of aesthetics and strength and durability was determined to be defective (×).

  The above results are shown in Tables 1 and 2.

From the results of Examples 1 to 5 in Table 1 and Table 2 and Comparative Example 1, by adding polyolefin beads to the coating floor material, the coating floor has excellent strength and durability while maintaining good beautification. It was found that can be formed.
However, from the results of Examples 1 to 4 and Comparative Examples 2 and 3, in order to obtain the above effect, the surface roughness Ra of the coated floor needs to be 0.1 μm or more and 0.5 μm or less. In addition, in the systems of Examples and Comparative Examples, it was found that the blending ratio of the polyolefin beads is preferably 2 parts by mass or more and 15 parts by mass or less per 100 parts by mass of the epoxy resin.

  Furthermore, from the results of Examples 3 and 5, it was found that it is preferable to use ultrahigh molecular weight polyethylene beads having an average molecular weight of 1 million or more and 6 million or less as the polyolefin beads.

Claims (3)

  A coated floor, which is formed by applying a coated floor material in which polyolefin beads are blended with a binder resin, and has a surface roughness Ra of 0.1 μm or more and 0.5 μm or less.   The coating floor according to claim 1, wherein a mixing ratio of the polyolefin beads in the coating floor material is 2 parts by mass or more and 15 parts by mass or less per 100 parts by mass of the binder resin.   The coated floor according to claim 1 or 2, wherein the polyolefin beads are ultra high molecular weight polyethylene beads having an average molecular weight of 1 million or more and 6 million or less.