JPH0718230B2 - Synthetic resin coated floor and its construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a synthetic resin coated floor and a construction method thereof. More specifically, the invention relates to a synthetic resin coated floor having excellent anti-slip properties and cleaning properties. The present invention relates to a coated floor and a suitable construction method therefor.

<Problems to be solved by conventional techniques and inventions> Recently, in floors of factories, etc., in consideration of environmental hygiene, aesthetics, etc., as a part of dust-proof measures, a coating film composed of a synthetic resin coating solution on the surface. The so-called painted floor is used.

The coated floor is required to have excellent cleanability for the purpose of shortening the cleaning time and improving productivity. Further, in order to ensure safety, so-called anti-slip property, which is difficult to slip even if water or oil adheres, is required.

However, the above-mentioned anti-slip property and cleanability are mutually contradictory elements, and if importance is attached to the cleanability, the anti-slip property is sacrificed. There is a problem that it takes effort.

For example, in order to improve the anti-slip property, generally, 0.2-1.0 mm aggregates composed of silica sand, urethane chips, rubber chips, etc. are dispersed and fixed in a coating film to form protrusions on the surface of the coating floor. However, the protrusions only hinder the cleaning, and the aggregate easily separates from the coating floor, which may cause a new stain.

Further, in the case of a coated floor that requires particularly high slip resistance, the particle size of the aggregate is increased or the amount of the aggregate is increased, but in this case, the cleaning property may be extremely deteriorated. There is.

On the contrary, in order to improve the cleaning property, a rounded protrusion having a low height is preferable, but such a protrusion may have insufficient slip resistance.

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

The present invention has been made in view of the above circumstances, and provides 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 formed by curing a synthetic resin-based coating liquid, and a height of 0.4 to
It is characterized by having 0.8 mm rounded protrusions on the surface.

Further, the method for applying a synthetic resin coated floor of the present invention is an epoxy resin prepolymer, 5 to 20 parts by weight of a non-reactive diluent with respect to 100 parts by weight of the epoxy resin prepolymer, and 22 to 40 parts by weight. 22 to 40 parts by weight per 100 parts by weight of this vinyl ester resin-based prepolymer and a synthetic resin-based coating liquid having thixotropy, or a vinyl ester resin-based prepolymer containing a thickener and a fine powder filler. Part of a synthetic resin coating liquid containing a thickening agent and a fine powder filler and having thixotropy at a viscosity of 10,000 to 50,000 cP and a synthetic resin coating floor using a nozzle with a diameter of 2 to 4 mm. It is characterized by forming a rounded protrusion with a height of 0.4 to 0.8 mm by spray coating on the surface of.

<Operation> In the synthetic resin coating floor of the present invention having the above-mentioned configuration, the synthetic resin coating liquid is cured, and the height is 0.4 to
Within the range of 0.8 mm, the rounded protrusions surely prevent slipping without hindering cleaning.

Further, according to the method for applying a synthetic resin-coated floor of the present invention, a prepolymer, a thickener, a fine powder filler, and further contains a non-reactive diluent in the above proportion, if necessary,
With a thixotropic synthetic resin-based coating solution, the viscosity is reduced to 10,000 to 50,000 cP by stirring etc., and the caliber is 2 to 4 m.
When sprayed in a granular manner onto the surface of a synthetic resin floor using the m nozzle, the viscosity of the surface of the floor rises and the coating hardens while maintaining the granularity. A rounded protrusion with a height of 0.4 to 0.8 mm that is excellent in cleaning and cleaning properties is formed.

<Example> Hereinafter, the present invention will be described with reference to the drawings illustrating an example.

As shown in FIG. 1, in the synthetic resin coated floor of this embodiment, a synthetic resin undercoat layer 2 and a base coat layer 3 are laminated on the surface of a base 1 made of mortar, concrete or the like, On the surface of the base coat layer 3,
A large number of projections 31 each having a substantially semicircular cross section formed by curing a synthetic resin coating liquid are formed.

The height (n in FIG. 1) of the many protrusions 31 is 0.4.
Must be within 0.8 mm. Height of protrusion is 0.4 mm
When it is less than the above range, the slip resistance during dry and wet is lower than that of concrete, making it slippery and dangerous, and conversely, when the height of the protrusion exceeds 0.8 mm, the cleaning property deteriorates.

The diameter of the protrusions 31 (d in the figure) is not particularly limited, but is preferably in 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 is relatively low, and there is a risk that the lower limit of the above range may be exceeded.
On the other hand, if the diameter of the protrusion exceeds 3.0 mm, the protrusion becomes flat and slip resistance becomes poor.

The number of the above-mentioned projections 31 per unit area on the surface of the base coat layer 3 varies depending on the diameter of the above-mentioned projections 31 and the like. For example, for a projection having a diameter of 1.0 to 2.0 mm, it is 15 to 1 cm ² It is preferable that there be about 30 pieces. If the number of protrusions per cm ² is less than 15, the slip resistance may be insufficient, and if it exceeds 30, the cleaning property may be deteriorated.

In addition to the semicircular projections schematically shown in FIG. 1, the projections having a substantially semicircular cross section referred to here include, for example, projections having a substantially trapezoidal cross section with rounded corners. It also includes protrusions that are out of shape, and in reality, it is considered that protrusions of various shapes are mixed. Further, in FIG. 1, the plurality of protrusions 31 ... Are drawn at substantially the same height, but in reality, protrusions having slightly different heights are mixed.

Undercoat layer 2, base coat layer 3 and protrusions
As the synthetic resin material constituting 31 ..., so-called curing type synthetic resin-based coating liquids such as epoxy resin-based, urethane resin-based, polyester resin-based, vinyl ester resin-based, etc. which are generally used for floor coating at present. What is applied and cured is used.

The above-mentioned curing type synthetic resin-based coating liquid is one in which the prepolymer in the coating liquid is cured into macromolecules by the curing reaction and is cured, and each resin-based prepolymer is the main element, and this main element is a curing catalyst, It is composed by dissolving or dispersing together with subelements such as a pigment, a dispersant and a diluent. In addition,
This curing type synthetic resin coating solution is a two-component room temperature curing type, a two-component thermosetting type, one
Various forms such as liquid moisture curing type can be used.

The synthetic resin materials forming the undercoat layer 2, the base coat layer 3 and the protrusions 31 are usually of the same type in order to improve the adhesion between the layers. If they are good, resins of different systems can be used.

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

On the other hand, the protrusions 31 are made of a thixotropic synthetic resin-based coating liquid, and an external force is applied to the synthetic resin-based coating liquid by stirring or the like to reduce the viscosity due to the thixotropic coating, and the base coat layer 3 When it is spray-coated in a granular manner on the surface of, the surface of the base coat layer 3 returns to the state before shaking, the viscosity of the synthetic resin coating liquid increases and the granular state is maintained, and the curing reaction proceeds in that state. The protrusions 31 ... Are formed.

As the thixotropic synthetic resin-based coating liquid, one containing an epoxy resin-based prepolymer as a main element or one containing a vinyl ester resin-based prepolymer as a main element is used.

Of these, the former, which has an epoxy resin-based prepolymer as a main element, is a non-reactive material of 5 to 20 parts by weight based on 100 parts by weight of the prepolymer, in addition to the prepolymer being blended with a predetermined amount of the subelement. By adding 22 to 40 parts by weight of a thickener and a fine powder filler, a diluting agent is added.

In such epoxy resin-based synthetic resin-based coating liquid, if the proportion of the non-reactive diluent is less than the above range, or if the total proportion of the thickener and fine powder filler exceeds the above range, The thixotropy becomes insufficient and the viscosity of the synthetic resin-based coating liquid cannot be sufficiently lowered by stirring or the like, and the viscosity is too high, and spray coating becomes difficult. vice versa,
When the proportion of the non-reactive diluent exceeds the above range, or the total proportion of the thickener and the fine powder filler is less than the above range, thixotropy is too strong and the synthetic resin system is agitated. The viscosity of the coating liquid becomes too low, and it takes time for the viscosity to increase after spray coating, and the synthetic resin coating liquid flows and the granules collapse, making it impossible to form clear protrusions.

On the other hand, the latter, which has a vinyl ester resin-based prepolymer as a main element, is a thickener containing 22 to 40 parts by weight with respect to 100 parts by weight of the prepolymer, together with the prepolymer in a predetermined amount. And thixotropic properties are imparted by adding a fine powder filler.

In such a vinyl ester resin-based synthetic resin-based coating liquid, when the total ratio of the thickener and the fine powder filler exceeds the above range, thixotropy becomes insufficient and the synthetic resin-based coating liquid is stirred. The viscosity of the coating liquid cannot be reduced sufficiently, and the viscosity is too high, making spray coating difficult. On the other hand, when the total ratio of the thickener and the fine powder filler is less than the above range, the thixotropic property is too strong and the viscosity of the synthetic resin coating solution becomes too low due to stirring etc. However, it takes a long time to increase the viscosity, the synthetic resin coating liquid flows, and the grains are broken, so that it becomes impossible to form clear protrusions.

The viscosities of both synthetic resin coating liquids used during spraying must be within the range of 10,000 to 50,000 cP. If the viscosity is less than 10,000 cP, the particle size does not increase to the extent that the particle size can be maintained after spray coating, the synthetic resin coating fluid flows, and the particle size collapses, making it impossible to form clear protrusions. When the viscosity exceeds 50,000 cP, the fluidity of the coating solution is insufficient and spray coating becomes difficult.

In order to impart thixotropy to the synthetic resin-based coating liquid, the thickening agent added to this synthetic resin-based coating liquid includes colloidal silica, organic bendonite, aluminum stearate,
Examples include hydrogenated castor oil, polymerized vegetable oil, amide wax, fibrous clay minerals, and the like, and fine powder fillers such as precipitated calcium carbonate and calcium carbonate such as heavy carbon; talc, carbon black, clay, wood powder, pulp. A powder etc. are illustrated. Examples of non-reactive diluents include organic solvents such as benzyl alcohol.

When the 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 the components are mixed to prepare the synthetic resin coating liquid. For example, the components may be mixed in a tank of a spraying machine, and at the same time, the viscosity may be lowered to adjust the viscosity to fall within the above range, and then spray coating may be performed immediately. In the case of a one-liquid type synthetic resin coating liquid, it may be used for spray coating after stirring in the tank or the like to reduce the viscosity to the above range. If the viscosity of the synthetic resin coating liquid in the tank rises during spraying, if an external force is applied, such as by stirring, the viscosity of the synthetic resin coating liquid will decrease again due to thixotropic change of the synthetic resin coating liquid. You can

As a spraying machine for spray-coating the surface of the base coat layer 3 with the synthetic resin coating solution, a normal spraying machine such as a resin gun can be used, but the nozzle diameter of the spraying machine is 2 Must be within ~ 4 mm. If the diameter of the nozzle is less than 2 mm, the height of the protrusion will be lower than 0.4 mm, and it will not be possible to form a coated floor with sufficient anti-slip properties. Conversely, if the diameter of the nozzle exceeds 4 mm, the height of the protrusion will increase. Is 0.8 mm
And the cleaning performance of the painted floor is deteriorated.

The spraying pressure of the spraying machine is a normal pressure at which the synthetic resin coating liquid having the above-mentioned viscosity range can be sprayed and applied, for example, 5 to 5.
It may be about 7 kgf / cm ² , and when the viscosity of the synthetic resin coating solution is as low as 10,000 to 20,000 cP, the spraying pressure may be about ² to 5 kgf / cm ² .

The spray amount of the synthetic resin coating liquid is preferably 0.3 to 0.5 kg / m ² . If the spray rate is less than 0.3 kg / m ² , the amount of coating solution may be too small to form a protrusion with a sufficient size.Conversely, the spray rate should be 0.5 kg / m ² . When it exceeds the above range, there is a possibility that the coating solution becomes too much to form a continuous coating film and it becomes impossible to form clear projections.

The synthetic resin coated floor of the present invention and the construction method thereof are not limited to the above-mentioned embodiments.

For example, the constitution of the synthetic resin coating floor is not limited to the two-layer type coating floor including the undercoat layer 2 and the base coat layer 3 in the embodiment, but may be, for example, three or more layers or a single layer. Can be applied to any type of plaster floor.

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

In addition, various modifications can be made without departing from the spirit of the invention.

<Experimental example> Hereinafter, the present invention will be described based on an experimental example.

(Preparation of coating liquid) Epoxy resin coating liquid 100 parts by weight of epoxy resin prepolymer (trade name "Epicoat 828" manufactured by Yuka Shell Epoxy Co., Ltd.), 6 parts by weight of ultrafine silica as a thickener, fine powder 25 parts by weight of heavy carbon as a filler, 12.5 parts by weight of benzyl alcohol as a non-reactive diluent, and 40 parts by weight of a curing agent containing polyamine as a main component are further mixed with stirring using an electric mixer. Then, an epoxy resin-based coating liquid was prepared.

-Vinyl ester resin-based coating liquid Vinyl ester resin-based prepolymer (manufactured by Japan Yupica Co.,
Brand name "Neopol 8250L") 100 parts by weight, fibrous clay mineral as a thickener 25 parts by weight, heavy carbon powder 8 parts by weight as a fine powder filler, methyl ethyl ketone peroxide (55%) 1 part as a curing agent Parts and 0.5 part by weight of cobalt naphthenate (metal 6%) as a curing accelerator were mixed by stirring with an electric mixer to prepare a vinyl ester resin-based coating liquid.

(Experimental Example 1) The epoxy resin coating liquid and the vinyl ester resin coating liquid were stirred and mixed in the tank of the spraying machine, and the epoxy resin coating liquid was 22,000 cP and the vinyl ester resin coating liquid was 35,000. With the viscosity adjusted to cP, a spraying pressure of 7 kgf / cm ² , spraying rate of 0.4 kg / m ² and spraying temperature of 25 ° C were used using a resin gun having nozzles of each diameter shown in Fig. 2 (a). Under the conditions described above, a large number of protrusions were formed on the surface of the base coat layer by spraying on the surface of the epoxy resin base coat layer, and the height was measured. The relationship between the height of the formed protrusion and the diameter of the nozzle is shown in FIG. In the figure, circles and solid lines are epoxy resin-based coating liquids,
The mark X and the alternate long and short dash line show the results for the vinyl ester resin-based coating liquid.

As a result of the above measurement, as shown in the same figure, the height of the protrusion and the diameter of the nozzle are in a direct proportional relationship, and in order to form a protrusion of 0.4 to 0.8 mm in height, in any resin system, the nozzle It has been found that the diameter of must be 2 to 4 mm.

(Experimental Example 2) Benzyl alcohol as a non-reactive diluent, ultrafine silica as a thickener, and 100 parts by weight of an epoxy resin prepolymer (trade name "Epicoat 828" manufactured by Yuka Shell Epoxy Co., Ltd.), and An epoxy resin-based coating liquid was prepared by changing the blending amount of heavy carbon powder as a fine powder filler. Then, each epoxy resin-based coating liquid is stirred and mixed to obtain various viscosities, and a spraying pressure of 7 kgf / cm ² , a spraying amount of 0.4 kg / m ² , and a spraying temperature of 25 ° C., a nozzle having a diameter of 3 mm. Spraying on the surface of the epoxy resin base coat layer using a resin gun having a, and observing the formation state of projections, the compounding amount of the non-reactive diluent is 5 to 20 parts by weight with respect to 100 parts by weight of the epoxy resin prepolymer. , The total amount of the thickener and the fine powder filler is 22 to 40 parts by weight (thickener 2
~ 10 parts by weight, 20 to 30 parts by weight of fine powder filler) and when the viscosity is in the range of 10,000 to 50,000 cP, it is possible to form rounded protrusions excellent in anti-slip properties and cleaning properties. confirmed.

In addition, when the same test was performed for each of the 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-based coating liquid and the vinyl ester resin-based coating liquid prepared by adjusting the coating liquid were agitated on the surface of the epoxy resin base coat layer laminated on the surface of the base material of 15 cm × 15 cm. Mix and mix the epoxy resin coating solution to 2
With a viscosity of 2,000 cP and a vinyl ester resin-based coating liquid adjusted to 35,000 cP, a spraying pressure of 7 kgf / cm ² and a spraying amount of 0.
Apply 2kg by spraying under the conditions of 4kg / m ² and spraying temperature of 25 ℃.
Each sample provided with a protrusion having a height shown in FIG.

These samples were tested on a dirt acceleration tester consisting of a dirter and a rougher (Hideaki Ono, "A Study on Floor Dirt",
Monthly architectural finishing technology (see the April 1985 issue), and set it in the polygonal cylindrical rotating box of the cleaning machine, and in this rotating box, 10 steel balls with a diameter of 3 cm and a weight of 110 g, carbo 150g of Random No.80 and 2g of dark brown pastel (NUPASTEL No.209) as a substitute for dirt are put and the rotation speed is 20 times /
The sample surface was soiled by spinning for 3 minutes.

Next, each of the samples whose surfaces were soiled was set on the turntable of the roughing machine, and the turntable was rotated at a rotation speed of 110.
The surface was cleaned with a cloth pressed under a load of 34.1 kg for 20 seconds while rotating at a speed of revolutions / minute.

Then, the surface of each sample after cleaning was observed by 20 examinees under the illumination of a 130 lx neutral white fluorescent lamp, and the degree of contamination was measured.
The following 7 grades were evaluated.

・ Stain evaluation (common scale (z)) 1; Stain is not an issue.

 2; Dirt is hardly noticeable.

 3; I'm a little worried about dirt.

 4; I'm a little worried about dirt.

 5; I'm worried about dirt.

 6; Dirt is a big concern.

 7; I am very concerned about dirt.

The results are shown in Fig. 2 (b). Note that in the figure as well,
The mark and the solid line show the results for the epoxy resin coating liquid, and the cross marks and the dashed line show 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 0.8 m.
It has been found that, as long as the thickness is m or less, stains can be cleaned and removed to the extent that they are a little worrisome, and the cleanability is excellent in any resin system.

(Experimental Example 4) The epoxy resin-based coating liquid and the vinyl ester resin-based coating liquid were respectively stirred and mixed on the surface of the epoxy resin base coat layer laminated on the surface of a 30 cm × 30 cm base material to obtain an epoxy resin-based coating liquid. The coating liquid is 22,000 cP, the vinyl ester resin coating liquid is 35,000 cP viscosity adjusted, using a resin gun having a nozzle of each of the above-mentioned diameter, spray pressure 7 kgf / cm ² , spray amount 0.4 kg / Spray coating was performed under the conditions of m ² and a spraying temperature of 25 ° C. to prepare each sample having protrusions having the height shown in FIG. 2 (c).

Using a portable skid resistance tester (manufactured by Stanley), the slip resistance (skid resistance value) of the surface of each of these samples was measured in accordance with ASTM E 303 when dry and when wet. The results are shown in Fig. 2 (c).

In the figure, the circles near the solid line show the results of drying with the epoxy resin coating solution, the cross symbols show the results of drying with the vinyl ester resin coating solution, and the circles near the one-dot chain line show the epoxy resin system. Results when wet in the coating liquid,
The cross mark indicates the result when the vinyl ester resin-based coating liquid was wet.

As a result of the above measurement, as shown in the figure, the height of the protrusion is 0.4 m.
As long as it is m or more, in any resin system, both when dry and when wet, the slip resistance of the concrete surface (70 to 80 when dry,
It was found that it can exhibit the same or better anti-slip properties as when wet 30-40).

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

Further, the method for applying a synthetic resin-coated floor of the present invention is configured as described above, and the above-mentioned projections are formed only by spraying a viscosity-reducing synthetic resin-based coating liquid having thixotropic properties. , Which is suitable for constructing the synthetic resin coated floor of the present invention.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the layer structure of one embodiment of a synthetic resin coated floor of the present invention, and FIGS. 2 (a) to (c) show the results of Experimental Examples 1, 3, and 4, respectively. It is a graph shown. 1 ... Base, 2 ... Undercoat layer, 3 ... Basecoat layer, 31 ... Projection.

Claims (3)

[Claims] 1. A height obtained by curing a synthetic resin coating liquid.
A coated floor made of synthetic resin, characterized by having rounded protrusions of 0.4 to 0.8 mm on the surface. 2. An epoxy resin-based prepolymer, 5 to 20 parts by weight of a non-reactive diluent with respect to 100 parts by weight of the epoxy resin-based prepolymer, 22 to 40 parts by weight of a thickener and fine powder filling. A synthetic resin-based coating liquid containing an agent and having thixotropy, with a viscosity of 10,000 to 50,000 cP, with a caliber of 2 to 4 m.
A method for applying a synthetic resin-coated floor, which comprises spraying the surface of a synthetic resin-coated floor with a m nozzle to form rounded protrusions having a height of 0.4 to 0.8 mm. 3. A vinyl ester resin-based prepolymer, and 22 to 40 parts by weight of a thickener and a fine powder filler with respect to 100 parts by weight of the vinyl ester resin-based prepolymer,
A thixotropic synthetic resin coating solution with a viscosity of 10,000-5
At a pressure of 0,000 cP, spray it onto the surface of a synthetic resin floor using a nozzle with a diameter of 2 to 4 mm, and apply a height of 0.4 to 0.8.
A method for constructing a synthetic resin-coated floor, characterized in that a rounded protrusion of mm is formed.