JPH0347367A - Floor coated with synthetic resin and execution method thereof - Google Patents

Abstract

PURPOSE:To promote cleanness by applying spray painting of synthetic resin system painting liquid having oscillatory efficiency to the surface of a floor, and forming roundish projections with a specific height. CONSTITUTION:An undercoat layer 2 of synthetic resin and a base coat layer 3 are laminated on the surface of mortar and concrete foundation 1. Synthetic resin system painting liquid having oscillatory efficiency with oscillatory degree of about 1.4 - 6.0 is sprayed and spread on the surface of a synthetic resin coated floor by means of a nozzle with about 2 - 4mm of a caliber in a state of about 10,000 - 50,000cp of viscosity, and a large number of roundish projections 31 with a height of about 0.4 - 0.8mm are formed on the surface of the base coat layer 3. According to the constitution, a floor having excellent sliding proof efficiency and cleanness can be formed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a synthetic resin plastered floor and its construction method. This article relates to plastered floors and their preferred construction methods.

<Prior art and the problem to be solved by the invention> Recently, in consideration of environmental hygiene and aesthetics, a coating film made of a synthetic resin-based coating liquid has been applied to the surface of factory floors as part of dust-proofing measures. A so-called lacquered floor is used.

The painted floor is required to have excellent cleaning properties in order to shorten cleaning time and improve productivity. In addition, in order to ensure safety, we have designed a material that is resistant to slipping even if water or oil gets on it.
So-called anti-slip properties are also required.

However, the above-mentioned slip resistance and cleanability are mutually contradictory elements, and if you place emphasis on cleanability, you will sacrifice the slip resistance, and conversely, if you emphasize the slip resistance, the cleaning performance will deteriorate and cleaning will take more time. The problem is that it takes a lot of effort.

For example, in order to improve the anti-slip property, generally 0.2 to 1.0 fin aggregates made of silica sand, urethane chips, rubber chips, etc. are dispersed and fixed in the paint film, causing protrusions on the surface of the painted floor. However, these protrusions not only impede cleaning, but also tend to cause the aggregate to peel off from the painted floor, possibly causing new stains.

In addition, for painted floors that require particularly high slip resistance, the particle size of the aggregate is increased or the amount of aggregate is increased, but in this case, there is a risk that the cleanability will be extremely deteriorated. There is.

Conversely, in order to improve cleaning performance, rounded protrusions with a low height are preferable, but such protrusions may lack anti-slip properties.

Therefore, glass beads are currently used as aggregates to form rounded protrusions, but these glass beads have weak adhesive strength with resin and are easily peeled off, so they cannot be used for long periods of time. There is also the problem of not being able to withstand it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a synthetic resin coated floor that is excellent in both slip resistance and cleanability and can withstand long-term use, and a suitable construction method thereof. It is an object.

Means for Solving the Problems> In order to solve the above problems, the synthetic resin coating floor of the present invention is made by curing a synthetic resin coating liquid and has a height of 0.4 cm.
The construction method of the synthetic resin plastered floor of the present invention is characterized by having rounded protrusions of ~0.8 mm on the surface. The resin coating liquid has a viscosity of 10,000 to 50,000 cP and a diameter of 2 to 4 IIll! Spray the coating onto the surface of the synthetic resin floor using a nozzle of 0.4 to a height of 0.4~
It is characterized by forming a rounded protrusion of 0.8m+*.

The thixotropy is the viscosity η1 measured at a rotational speed (angular velocity) ω1 at a constant temperature using a rotational viscometer.
and the viscosity η2 when measured at a rotational speed ω2 (however, ω2>ω1), which is determined by the following formula.

η 2 Effect> In the synthetic resin coated floor of the present invention having the above configuration, the synthetic resin coating liquid is cured and the height is 0.
The rounded protrusions within the range of 4 to 0.8 mm do not hinder cleaning and reliably prevent slipping.

Further, according to the method for applying a synthetic resin painted floor of the present invention, a synthetic resin coating liquid having a thixotropy of 1.4 to 6.0 is heated to a viscosity of 10.000 to 50 by stirring or the like. ，
When the coating is applied by spraying it in granular form onto the surface of a synthetic resin floor using a nozzle with a diameter of 2 to 4 mm at a reduced pressure of 000 cP, the viscosity increases on the surface of the floor and hardens while maintaining the granularity. However, rounded protrusions with a height of 0.4 to 0.8 mm are formed on the surface of the synthetic resin painted floor, which has excellent anti-slip properties and cleanability.

<Examples> The present invention will be described below with reference to drawings showing examples.

As shown in FIG. 1, the synthetic resin painted floor of this example has a surface of a base 1 made of mortar, concrete, etc.
An undercoat layer 2 made of synthetic resin and a base coat layer 3 are laminated, and a protrusion 3 having a substantially semicircular cross section is formed by curing a synthetic resin coating liquid on the surface of the base coat layer 3.
1 is formed in large numbers.

The height of the above-mentioned large number of protrusions 31 (h in Fig. 1) is
must be within the range of 0.4 to 0.8 mm.

If the height of the protrusions is less than 0.4 mm, the anti-slip properties in dry and wet conditions will be lower than that of concrete, making it slippery and dangerous; on the other hand, if the height of the protrusions exceeds 0.8 mm, Cleanability deteriorates.

Further, the diameter (d in the figure) of the projections 31 is not particularly limited, but is preferably within the range of 0.5 to 3.0 mm. If the diameter of the protrusion is less than 0.5 mm, the height of the protrusion will be relatively low and may fall below the lower limit of the above range; conversely, if the diameter of the protrusion exceeds 3.0 mm, the height of the protrusion may become relatively low. It becomes flat and has poor anti-slip properties.

The number of the projections 31 per unit area on the surface of the base coat layer 3 varies depending on the diameter of the projections 31, for example, the diameter is 1.0 to 2.0.
Regarding the number of sequential protrusions, it is preferable that there are about 15 to 30 protrusions per 1aIi. If the number of protrusions per 1 crA is less than 15, the anti-slip property may be insufficient.
If the number exceeds 30, there is a possibility that cleaning performance may deteriorate.

In addition to the semicircular projections schematically shown in FIG. 1, the projections having a substantially semicircular cross section include, for example, projections having a substantially trapezoidal cross section with rounded corners. It also includes protrusions that are misshapen, and in reality, protrusions of various shapes coexist. Furthermore, in FIG. 1, the plurality of protrusions 31 are drawn at approximately the same height, but in reality, there are protrusions with somewhat different heights.

The synthetic resin materials constituting the undercoat layer 2, base coat layer 3, and protrusions 31 include epoxy resins, urethane resins, polyester resins, and vinyl ester resins, which are currently commonly used for painted floors. A so-called hardening type synthetic resin coating solution, such as a synthetic resin coating solution, is applied and cured.

The above-mentioned curing type synthetic resin coating liquid is cured by converting the prepolymer in the coating liquid into macromolecules through a curing reaction, and has the prepolymer of each resin type as the main element, and the main element is a curing catalyst, It is constructed by dissolving or dispersing it together with sub-elements such as pigments, dispersants, and diluents. In addition,
This curing type synthetic resin coating liquid has different curing methods, such as 2-part room temperature curing type, 2-part heat curing type, and 1-part curing type.
Various forms can be used, such as a liquid moisture curing type.

In addition, the synthetic resin materials constituting the undercoat layer 2, base coat layer 3, protrusions 31, etc. described in E are usually of the same type in order to improve the adhesion between each layer. As long as the adhesion is good, resins of different systems can be used.

The undercoat layer 2 and the basecoat layer 3 are formed by applying the above-mentioned synthetic resin-based coating liquid by a common coating method such as a spreading method and curing it.

On the other hand, the protrusions 31... are coated with a base coat using a synthetic resin coating liquid having thixotropy, applying an external force to this synthetic resin coating liquid by stirring, etc., and reducing the viscosity due to the thixotropy. When spray coating the surface of layer 3 in granular form, the surface of base coat layer 3 returns to its pre-thixotropic state, the viscosity of the synthetic resin coating liquid increases and the granular form is maintained, and the curing reaction proceeds in that state. Thus, the protrusions 31... are formed.

The synthetic resin coating liquid having thixotropy is manufactured by adding a thickener and a fine filler that is sufficiently smaller than the protrusions in addition to the above-mentioned components, and is used in the present invention. The thixotropy of the synthetic resin coating liquid is 1.4.
It needs to be within the range of ~6.0.

If the thixotropy of the synthetic resin coating liquid is less than 1.4, the thixotropy is insufficient, and the viscosity of the synthetic resin coating liquid cannot be lowered sufficiently by stirring, etc., and the viscosity is too high to be applied by spraying. becomes difficult, and conversely, when the thixotropy exceeds 6.0,
If the thixotropy is too strong, the viscosity of the synthetic resin coating liquid will become too low due to stirring, etc., and it will take time for the viscosity to increase after spraying, and the synthetic resin coating liquid will flow and the granules will break down. It becomes impossible to form clear protrusions.

The viscosity of the synthetic resin coating liquid when used for spraying must be within the range of 10.000 to 50.000 cP. If the viscosity is less than 10,000 cP, the viscosity will not increase to the extent that the granules can be maintained after spraying, and the synthetic resin coating liquid will flow, causing the granules to collapse, making it impossible to form distinct protrusions, and vice versa. To,
If the viscosity exceeds 50.0 OOcP, the fluidity of the coating liquid will be insufficient, making spray coating difficult.

In order to impart thixotropy to the synthetic resin coating liquid, the thickeners added to the synthetic resin coating liquid include colloidal silica, organic bentonite, aluminum stearate,
Examples include hydrogenated castor oil, polymerized vegetable oil, amide wax, fibrous clay minerals, etc. Fine powder fillers include calcium carbonate such as precipitated calcium carbonate and heavy coal; talc, carbon black, clay, wood powder, and valves. Examples include powder.

The blending ratio of the above-mentioned thickener and fine powder filler is not particularly limited, and the thixotropy may be adjusted within the above range depending on the type and blending ratio of each component constituting the synthetic resin coating liquid. obtain,
The optimal blending ratio is defined.

When the above synthetic resin coating liquid is a multi-component type such as a two-component type, the viscosity decreases due to thixotropy during stirring and mixing when blending each component to prepare the synthetic resin coating liquid. For example, each component may be mixed in a tank of a spray machine, and the viscosity may be lowered at the same time to adjust the viscosity to within the above range, and then spray coating may be performed immediately.

In the case of a one-component type synthetic resin coating solution, it may be used for spray coating after stirring in the tank or the like to lower the viscosity to within the above range. If the viscosity of the synthetic resin coating liquid in the tank increases during spraying, applying external force such as stirring will cause the viscosity to decrease again due to the thixotropy of the synthetic resin coating liquid. I can do it.

As a spraying machine for spraying the synthetic resin coating liquid onto the surface of the base coat layer 3, a normal spraying machine such as a ricing gun can be used, but the nozzle diameter of the spraying machine is It needs to be within the range of ~4 mm. If the nozzle diameter is less than 2 mm, the height of the protrusion is 0.4 m.
If the nozzle diameter is lower than 4 mm, it will not be possible to form a coated floor with sufficient anti-slip properties, and conversely, if the nozzle diameter exceeds 4 mm,
The height of the protrusion becomes higher than 0.8 yen, and the cleaning performance of the painted floor deteriorates.

The spraying pressure of the spraying machine is the normal pressure that can spray the synthetic resin coating liquid with the viscosity range mentioned above, for example, 5~
It is sufficient if it is about 7 kg f/ctA, and the viscosity of the synthetic resin coating liquid is 10□000 to 20.0OOc.
For low P, the spraying pressure is 2-5 kgf/
It may be about crA level.

The amount of synthetic resin coating liquid to be sprayed is 0.3 to 0.5 kg/
It is preferable that it is rrr. Spray amount is 0.3 kg
If the amount is less than /M, the amount of coating liquid is too small and there is a risk that protrusions of sufficient size cannot be formed.On the other hand, if the amount of spraying exceeds 0.5 kglrd, the amount of coating liquid is too large. There is a risk that the coating will become continuous, making it impossible to form clear protrusions.

In addition, the synthetic resin painted floor and its construction method of the present invention are not limited to the above embodiments.

For example, the composition of the synthetic resin coated floor may be different from the two-layer type coated floor comprising the undercoat layer 2 and the base coat layer 3 in the embodiment, as well as various conventionally known compositions, such as three or more layers or a single layer. Can be applied to types of painted floors.

In addition, as a construction method for constructing a synthetic resin painted floor, a method of applying a thixotropic synthetic resin coating liquid with a coating roller or the like having a large number of protrusions formed on the surface corresponding to the large number of protrusions. However, in consideration of shortening the construction time, etc., the construction method of the present invention, in which the synthetic resin coating liquid is spray-coated, is the most preferable construction method.

In addition, various changes can be made without changing the gist of the invention.

Experimental example The present invention will be explained below based on experimental examples.

(Preparation of coating liquid) - Epoxy resin coating liquid 100 parts by weight of epoxy resin prepolymer (manufactured by Yuka Shell Epoxy Co., Ltd., trade name "Epicoat 828J"), 6 parts by weight of ultrafine silica as a thickener, filled with fine powder. 25 parts by weight of heavy charcoal as an agent, 12.5 parts by weight of benzyl alcohol as a non-reactive diluent, and 40 parts by weight of a curing agent mainly composed of polyamine were added and stirred using an electric mixer. When mixed, the thixotropy at 25°C is 2.5
An epoxy resin coating solution was prepared.

・Vinyl ester resin coating liquid Vinyl ester resin prepolymer (manufactured by Nippon Ubiryokusha,
Product name "Neoball 8250LJ" 100 parts by weight, 25 parts by weight of fibrous clay mineral as a thickener, 8 parts by weight of heavy carbon as a fine powder filler, 1 part by weight of methyl ethyl ketone peroxide (55%) as a hardening agent and 0.5 parts by weight of cobalt naphthenate (metal 6%) as a hardening accelerator were stirred and mixed using an electric mixer to form a vinyl ester resin coating solution with a thixotropy of 3.2 at 25°C. Created.

(Experiment Example 1) The above epoxy resin coating liquid and vinyl ester resin coating liquid were stirred and mixed in the tank of a spray machine. With the viscosity adjusted to 35,000 cP, spray pressure cuff kg f /
ca, spraying amount 0.4 kg/d, spraying temperature 25
It is sprayed onto the surface of the epoxy resin base coat layer under the conditions of ℃ to form a large number of protrusions on the surface of the base coat layer,
Its height was measured. The relationship between the height of the formed protrusion and the diameter of the nozzle is shown in Figure 2 (al). In the same figure, the O mark and the solid line indicate the epoxy resin coating, and the X mark and the dashed line indicate the vinyl ester resin coating. The results for liquid are shown.

As a result of the above measurement, as shown in the figure, the height of the protrusion and the diameter of the nozzle are in direct proportion, and the height is 0.4 to 0.8.
In order to form a protrusion of mm, no matter which resin is used,
It turned out that the diameter of the nozzle should be 2-4 1 m.

(Experimental Example 2) Benzyl alcohol as a non-reactive diluent for 100 parts by weight of epoxy resin prepolymer (manufactured by Etl Shell Epoxy Co., Ltd., trade name [Epicote 828J)]
Epoxy resin coating liquids having various thixotropy degrees were prepared by changing the blending amounts of ultrafine silica as a thickener and heavy carbonaceous as a fine powder filler. Then, each epoxy resin coating liquid was stirred and mixed to give various viscosities, and the spray pressure cuff was kg f/cj and the spray amount was 0.4.
kg/go, spraying temperature 25°C, using a ricing gun with three caliber nozzles to the surface of the epoxy resin base coat layer, and observing the formation of protrusions, it was found that the thixotropy was 1. Within the range of .4 to 6.0, the viscosity is 1
When it is within the range of 0.000 to 50.000 cP,
It was confirmed that rounded protrusions with excellent slip resistance and cleanability could be formed. In addition, in the epoxy resin coating liquid having the above viscosity range and thixotropy range, the amount of the non-reactive diluent blended is 5 to 20 parts by weight, and the amount of the thickener is The amount of the fine powder filler was 20 to 30 parts by weight.

When similar tests were conducted on urethane resin-based, polyester resin-based, and vinyl ester resin-based coating liquids, the same results as above were obtained.

(Experimental Example 3) The epoxy resin coating liquid and the vinyl ester resin coating liquid prepared in the above coating liquid preparation were respectively stirred on the surface of the epoxy resin base coat layer laminated on the surface of the 15c+nX15cm base material. After mixing and adjusting the viscosity to 22,000 cP for the epoxy resin coating liquid and 35,000 cP for the vinyl ester resin coating liquid, spray using a ricing gun having a nozzle of each diameter described above. cg f/aA, spray m O, 4k
g/rrF and a spraying temperature of 25° C. to prepare each sample having protrusions having the heights shown in Fig. 2).

These samples were tested in a soiling acceleration tester consisting of a scrubbing machine and a roughening machine (Hidetoshi Ono, "A study on floor stains",
(Refer to the April 1985 issue of Monthly Architectural Finishing Technology), a steel ball with a diameter of 3 (7) and a weight of 110 g was placed in the polygonal cylindrical rotating box of the dusting machine. 1
0 pieces, 150 g of Carborundum Nα80, dark brown pastel as a dirt substitute (NUPASTIEL)
k209) and 3 at a rotation speed of 20 times/min.
The surface of the sample was smeared by spinning for a minute.

Next, each sample whose surface was soiled was set on the turntable of the rougher, and the turntable was rotated at a rotation speed of 11.
While rotating at 0 times/min, the surface was cleaned for 20 seconds with a cloth pressed under a load of 34.1 kg.

Then, 20 subjects observed the surface of each sample after cleaning under the illumination of a 130 lx daylight white fluorescent lamp, and evaluated the degree of dirt on the following 7 scales.

・Stain evaluation (common scale (2)) 1; Dirt does not bother me at all.

2; Dirt is hardly noticeable.

3: I am slightly concerned about the dirt.

4; I'm a little worried about the dirt.

5; 115 I'm quite concerned about this.

6; Most of the dirt bothers me.

7; I'm very concerned about the dirt.

The results are shown in Figure 2). In the same figure, the O mark and solid line indicate the results for the epoxy resin coating liquid, and the X marks and the dashed line indicate the results for the vinyl ester resin coating liquid.

As a result of the above evaluation, as shown in the figure, the height of the protrusion is 0.
．． Regardless of the resin type, as long as it is 8+a+s or less,
It was found that dirt could be cleaned and removed to the extent that it was only slightly noticeable, and that it had excellent cleaning properties.

(Experimental Example 4) The epoxy resin coating liquid and the vinyl ester resin coating liquid were stirred and mixed on the surface of the epoxy resin base coat layer laminated on the surface of a 30 cm x 30 cm base material to form an epoxy resin coating liquid. Coating liquid is 22,000
cP, vinyl ester resin coating liquid is 35,000 cP
With the viscosity adjusted to
co! , spraying Q O, 4 kg/rrl', and spraying temperature 25° C. to prepare each sample having protrusions having the height shown in FIG. 2 (C1).

These samples were tested using AST14E using a portable skid resistance tester (manufactured by Stanley).
The anti-slip property (skid resistance value) of the sample surface when dry and when wet was measured based on No. 303.

The results are shown in FIG. 2(C). In the same figure, the O mark near the solid line indicates the drying result for the epoxy resin coating liquid, the X mark indicates the drying result for the vinyl ester resin coating liquid, and the O mark near the - dotted chain line indicates the drying result for the epoxy resin coating liquid. The X mark indicates the result when wet with a vinyl ester resin coating liquid.

As a result of the above measurement, as shown in the figure, the height of the protrusion is 0.
If it is 4 mm or more, the anti-slip property of the concrete surface (dry 7
0 to 80, and 30 to 40 when wet).

<Effects of the Invention> The synthetic resin coated floor of the present invention is constructed as described above, and has a hardened synthetic resin coating liquid on the surface.
Since it has rounded protrusions with a height of 0.4 to 0.8 m+s, it has excellent anti-slip properties and cleanability. Moreover,
As mentioned above, the protrusions formed by curing the synthetic resin coating liquid are formed on the surface of the synthetic resin coating, so they do not peel off easily and can withstand long-term use. .

Furthermore, the method for applying a synthetic resin coated floor according to the present invention is configured as described above, and the protrusions are formed by simply spraying a thixotropic synthetic resin coating solution with a reduced viscosity. Therefore, it is suitable for constructing the synthetic resin plastered floor of the present invention.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing the layer structure of an example of a synthetic resin painted floor of the present invention, and FIG. 1... Base layer, 2... Undercoat layer, 3... Base coat layer, 31... Protrusion.

Claims (1)

[Claims] 1. A synthetic resin painted floor characterized by having rounded protrusions with a height of 0.4 to 0.8 mm on the surface, which are obtained by curing a synthetic resin coating liquid. 2. Apply a synthetic resin coating liquid with a thixotropy of 1.4 to 6.0 to a viscosity of 10,000 to 50,000 cP using a nozzle with a diameter of 2 to 4 mm. Spray on the surface of the painted floor to a height of 0.4 to 0.8
A method for constructing a synthetic resin painted floor characterized by forming protrusions with a roundness of mm in diameter.