JPH1190316A - Use of thermosensitive coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a coating film showing variety of tones even when a same coating material is used and to obtain a multicolored pattern by selecting the temp. of an emulsion coating material having thermosensitive gelling property to give changes in the tone of a coating film after dried. SOLUTION: In the emulsion coating material having thermosensitive gelling property, the amt. and size of bubbles in the coating material change depending on the temp. of the coating material. This effect causes changes in the morphology of the emulsion coating material having thermosensitive gelling property, and therefore, the effect causes changes in the morphology of the coating film when the emulsion having thermosensitive gelling property is formed into a film. The difference in the morphology of the film of the emulsion causes changes in the hue of the film formed and changes in the apparent hue of pigments or aggregates in the coating film. Therefore, the finish tone can be changed in a coating film of the emulsion coating material having thermosensitive gelling property. Thereby, coating films with different tones can be obtd. from a same emulsion having thermosensitive gelling property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using a paint capable of finishing with different colors using the same paint, and a paint capable of forming a colorful pattern using the properties of the paint even if the same paint is used. The present invention relates to a method of use, to compounding them with another object to be coated, and to a compounded product. The application relates to finishing on the inside and outside surfaces of a building and the surface of a building, and the field of use is the building field.

[0002]

2. Description of the Related Art Heretofore, in the case of the same paint having the same coloring component, the color tone of a formed coating film has always been constant, not only for the interior and exterior of buildings. Therefore, in order to obtain a coating film having a different color tone, it is necessary to prepare another coating material having a different coloring component. In addition, there are many types of coating methods and paints for obtaining a variety of patterns for building interior and exterior, and as the method, a method of obtaining paints of different colors by coating, the paints are incompatible with each other,
For example, those in which an oil-based paint is dispersed in a water-based paint, or vice versa, such as a paint in which an aqueous paint is dispersed in an oil-based paint, the former requires the use of a plurality of paints having different coloring components. The latter has a drawback that it does not give a three-dimensional finish.

[0003]

In the present invention, even when the same paint is used, it is possible to obtain a coating film in which the obtained color tone is changed, and to obtain a colorful pattern by using a plurality of them, or An object of the present invention is to combine a coating film having a color change with another object to be coated.

[0004]

Means for Achieving the Object In order to achieve the above object, the gist of this application is the means defined in claims 1 to 4 below. The feature of the first aspect is that the color tone of the dried coating film is changed by selecting the coating temperature of the emulsion coating material having the thermosensitive gel property.

A second feature of the present invention is that two or more emulsion paints having the same thermosensitive gel property but having different paint temperatures are prepared, and these paints are not completely mixed on the same painted surface. The main purpose is to paint and form a film, and the finish is to form a colorful pattern.

[0006] The feature of claim 3 is that the same emulsion paint having a heat-sensitive gel property is used for plywood, ceramic siding,
Metal siding, ALC plate, extruded cement board, G
The main purpose is to apply to an object to be coated arbitrarily selected from an RP board, a PC board, a nonwoven fabric, a woven fabric, and the like.

[0007] The feature of claim 4 is that of claim 1, claim 2,
Alternatively, the object to which the method for using the emulsion paint having a thermosensitive gel property according to claim 3 is a plywood, ceramic siding, metal siding, ALC plate, GRP plate, P
The base material is arbitrarily selected from a C plate, a nonwoven fabric, a woven fabric, and the like.

Hereinafter, each of the elements of the present invention will be described. First, the paint used in the present invention is an emulsion paint having a thermosensitive gel property. As a condition for the emulsion paint to have a thermosensitive gel property, a synthetic resin emulsion which is a binder of the emulsion paint may have a thermosensitive gelling agent. The heat-sensitive gelling agent is used in a synthetic resin solid content ratio of 0.1 to 20% by weight.

The amount of the heat-sensitive gelling agent to be added may be determined in balance with the temperature at which gelation is desired. The amount added is the weight of the active ingredient of the heat-sensitive gelling agent, and that which is liquid at room temperature becomes the total weight. However, when the solid fraction of the synthetic resin emulsion is less than 0.1% by weight, even when a gelling agent is added, the heat-sensitive gelling property is small and uniform gelation is not performed. Conversely, when the gelling agent is used in an amount exceeding 20% by weight, the synthetic resin emulsion becomes extremely unstable, and the production of paint becomes difficult. Also, even if paint can be manufactured,
The paint film obtained from the paint has poor physical properties such as water resistance,
Not practical. In addition, the addition of such a thermosensitive gelling agent changes the emulsion from a stable one to an unstable one. Therefore, it is necessary to find a gel point that maintains the minimum necessary stability.

As to the kind of the heat-sensitive gelling agent, there are disclosed in the literature such as zinc ammonium complex salt, nonionic surfactant, inorganic metal salt, polypropylene glycol, silicone polyether copolymer, polyvinyl methyl ether, etc. JP-A-63-193901;
A known device disclosed in Japanese Patent Publication No. 308844 or the like may be used.

As the heat-sensitive gel paint, in addition to the paint which is a thin film, a pattern paint for forming a concavo-convex pattern, a yuzu skin pattern, a rippled pattern, a crater pattern, and a finished feeling utilizing the color tone of the aggregate itself as it is. There are eggplant-based paints. Even with a skin-based paint, it is possible to form a yuzu skin pattern, a concavo-convex pattern, a sand wall-shaped pattern, etc., from a substantially smooth one.

[0012] As a method of applying the coating material, a conventionally known coating means can be used, and examples thereof include coating with a trowel, roller, spraying, roll coater, knife coater, flow coater, brush roll, spraying, dripping, and dipping. Further, the application amount can be several tens of grams per square meter to be thinned to 10 kg to be thick. However, when trying to pay the cost of finishing paints economically, 5
It is selected in within kg / ^{m 2.}

[0013] The base material to be coated is plywood, ceramic siding, metal siding, which can be produced in a factory.
It is selected from ALC plate, GRC plate, PC plate, non-woven fabric, woven fabric and the like.

The drying means may be appropriately selected from natural drying, hot air drying, infrared heating drying, far infrared heating drying, electric heating drying, electron beam irradiation heating, direct fire drying and the like.

[0015]

In the emulsion paint having a thermosensitive gel property, the amount and size of bubbles in the paint vary depending on the paint temperature. The action changes the form of the emulsion paint having the thermosensitive gel property, and thus changes the form of the coating film formed when the emulsion having the thermosensitive gel property is formed. The difference in the film formation form of the emulsion changes the hue of the formed film, and in turn changes the apparent hue of the pigment or aggregate in the coating film.
Therefore, even in the formed coating film of the emulsion paint having a thermosensitive gel property, the finished color tone is changed.

The degree of change in color tone is basically a difference in coating temperature. However, even in emulsions having the same heat-sensitive gelling property, the degree of heat-sensitive gelling varies depending on the ratio of the heat-sensitive gelling agent to the resin. The degree of color change varies. Further, the degree of change in color tone also changes depending on the type of emulsion.

The manner in which the change appears is that it is caused by the temperature of the coating material before gelation, or in the case of forming a film without gelation, by the temperature of the coating material before film formation. Therefore, there is almost no change due to the difference in the ambient temperature of the drying furnace in the case of performing the gelation or the color tone of the formed coating film due to the difference in the ambient temperature in the case of the natural drying. However, even if the total amount of heat consumed for drying the paint is the same, a slight difference occurs if the shape of the integral curve of the heat supply amount with respect to time is different.

When an emulsion having a thermosensitive gel property is gelled, moisture and air bubbles are trapped as they are. Thereafter, water is evaporated, and the film is formed while maintaining the shape at the time of gelation. Therefore, voids are generated, the refractive index of light changes, and the transparency of the coating film changes. If gelation is not performed, moisture evaporates from the surface and a film is formed, so that voids are less likely to occur. The air bubbles in the coating material having the thermosensitive gel property at each temperature are much more stable than the air bubbles in the coating material having no thermosensitive gel property. Therefore, a coating film having a changed color tone can be obtained even in the case of drying at room temperature without causing gelation, unless the coating material temperature changes during the film formation of the coating material having the thermosensitive gel property.

When applying an emulsion paint having a thermosensitive gel property, the color tone of the coating film changes with respect to the temperature of the paint, so that the paint temperature is changed in order to keep the desired color tone constant. In some cases, care must be taken not to cause such a problem. However, by using the above action, a coating film having a changed color tone can be obtained with an emulsion having the same thermosensitive gel property.

[0020]

Example 1 In Example 1, a skin-based coating material having the same composition and having heat-sensitive gel properties and having a coating temperature of 30 ° C. and 15 ° C. was used as a coating material, a nonwoven fabric was used as a base material, and a hot air drying furnace was used. After drying, color change was confirmed. The composition of the skin-based coating material is described in Formulation 1 below. For the non-woven fabric of the base, Ekule (trade name, manufactured by Toyobo Co., Ltd.) was used, and the basis weight of this non-woven fabric was 100 g.

Formulation 1 Raw material name Formulation weight Synthetic resin emulsion 270 parts by weight Thermal gelling agent 26 parts by weight Aggregate a 450 parts by weight Aggregate b 70 parts by weight Aggregate c 370 parts by weight Coating aid 10 parts by weight Thickener 1 part by weight Antifoam 3 parts by weight ──────────────────────────── Total 1200 parts by weight

The synthetic resin emulsion was an acrylic synthetic resin emulsion having a solid content of 55%. A zinc ammonium complex salt was used as the thermosensitive gelling agent, and the active ingredient used was a 16% aqueous solution. Methyl cellulose was used as the thickener. Also,
Aggregate a is cold water sand manufactured by Dowa Calfine Co., Ltd., trade name "KD-1" (about 30-40 mesh), and aggregate b is cold water sand manufactured by Dowa Calfine Co., Ltd., trade name " KD-100 "(approximately 100-200 mesh), and the aggregate c used is a colored aggregate manufactured by Shinto Toji Co., Ltd., trade name" No. 8 Red "(approximately 60-80 mesh). did.

The skin-based coating material is prepared by adding water to two kinds of paints having different paint temperatures in advance to obtain a viscosity of 250%.
After adjusting to ps, a coating amount of 2 kg / m ^{2 was} applied onto the nonwoven fabric by a porous roller. The paint-coated surface was immediately placed in a hot-air drying oven in which the ambient temperature was kept at 150 ° C. for 3 minutes, and then left in a curing room at 50 ° C. for 48 hours. The color tone of the painted surface using a paint having a paint temperature of 15 ° C. was vermilion, which is a color approximating U07-50V, but the painted surface using a paint having a paint temperature of 30 ° C., was pink, which was a color approximating U07-60T. Became. In addition, the symbol representing the color tone was selected from "Standard Color Sample Book for Paint" of the 1997 U edition issued by the Japan Paint Manufacturers Association.

In Example 2, a metal siding using a galvanized steel sheet which had been previously treated with a primer was used as a base, and a glossy paint having a heat-sensitive gel property was used. Two types were used. The formulation of the glossy paint is described in Formulation 2 below.

Formulation 2 Raw material name Formulation weight Synthetic resin emulsion 600 parts by weight Thermal gelling agent 55 parts by weight Titanium oxide 250 parts by weight Carbon black (color pigment) 30 parts by weight Dispersant 10 parts by weight Defoamer 5 parts by weight Thickener 5 parts by weight Coating aid 45 parts by weight ──────────────────────────── Total 1000 parts by weight

The synthetic resin emulsion was an acrylic synthetic resin emulsion having a solid content of 45%. As the thermal gelling agent, a zinc ammonium complex salt (active ingredient 15%) was used. Methyl cellulose was used as the thickener.

The viscosity of the glossy paint of Formulation 2 was adjusted to 30 ps by diluting two kinds of paints having different paint temperatures with water, and each was coated on a galvanized steel sheet with an airless spray gun at a coating amount of 300 g / m ^2. did. afterwards,
Immediately the painted metal siding was placed in a far infrared drying oven for 40 minutes. The color tone after drying is a gray color which is a U69-50D approximation color on a painted surface using a paint temperature of 8 ° C, and a U75-70D color tone on a painted surface using a paint temperature of 30 ° C. It became a certain whitish gray color.

In the third embodiment, a mold having a concave sandstone crack pattern made of silicone resin was used, and a skin-based coating material having heat-sensitive gel properties was used as the coating material. After preparing two kinds of the skin-based coating materials, one having a coating temperature of 35 ° C. and the other having a coating temperature of 10 ° C., and adjusting the viscosity of the skin-based coating material according to the following formulation 3 to the concave portion of the mold to 200 ps, Pour into molds, each with 35 ° C paint temperature is 35 ° C
Those having a coating temperature of 10 ° C. were dried in a constant temperature room at 10 ° C. The pouring amount corresponding to the application amount was 3 mm in average thickness and about 6 kg / m ^{2 because} of the unevenness of the pattern. The color tone on the surface after drying is beige, which is a color approximating to U19-80L, when using a coating material having a coating temperature of 35 ° C.
The color became orange, which was an approximate color of 17-70L.

Formulation 3 Raw material name Formulation weight Synthetic resin emulsion 270 parts by weight Thermal gelling agent 15 parts by weight Aggregate d 450 parts by weight Aggregate e 450 parts by weight Thickener 2 parts by weight Coating aid 10 parts by weight Defoaming agent 3 parts by weight ──────────────────────────── Total 1200 parts by weight

The synthetic resin emulsion was an acrylic synthetic resin emulsion having a solid content of 55%. As the thermosensitive gelling agent, a 15% aqueous solution using a zinc ammonium complex salt was used. Methyl cellulose was used as the thickener. Aggregate d is cold water sand manufactured by Dowa Calfine Co., Ltd., trade name "KD-
1 "(approximately 30 to 40 mesh), and the aggregate e is a colored aggregate manufactured by Shinto Ceramics Co., Ltd., trade name" No. 8 Buff ".
(Approximately 60 to 80 mesh).

In Example 4, a skin-based coating material of the following formulation 4 was used as a coating material, a nonwoven fabric was used as a base material, and hot-air drying through a conveyer furnace was performed to confirm a change in color tone.
As the skin-based coating materials, a total of three types of coating materials having a coating temperature of 35 ° C, 20 ° C, and 5 ° C were prepared.
As the non-woven fabric of the base, one having a basis weight of 100 g under the trade name Equle manufactured by Toyobo Co., Ltd. was used.

Formulation 4 Raw material name Formulation weight Synthetic resin emulsion 270 parts by weight Thermal gelling agent 20 parts by weight Aggregate a 440 parts by weight Aggregate b 55 parts by weight Aggregate c 400 parts by weight Coating aid 10 parts by weight Thickener 1 part by weight Antifoam 4 parts by weight 剤 Total 1200 parts by weight

The synthetic resin emulsion was an acrylic synthetic resin emulsion having a solid content of 45%. As the thermosensitive gelling agent, a zinc ammonium complex salt was used, and an aqueous solution containing 12% of this active ingredient was used. Methyl cellulose was used as the thickener. Aggregate a is cold water sand manufactured by Dowa Calfine Co., Ltd.
Product name "KD-1" (about 30-40 mesh)
Aggregate b is cold water sand manufactured by Dowa Calfine Co., Ltd., “K
D-100 "(approximately 100 to 200 mesh), and the aggregate c is a colored aggregate manufactured by Shinto Tohzo Co., Ltd., trade name" N
o. 8 Red "(about 60-80 mesh).

For all three types of skin-based coating materials, water is added in advance to adjust the viscosity to 250 ps, which is a sprayable viscosity. 5 kg / m ² was applied. The nonwoven fabric coated with the paint was subjected to preheating at 80 ° C. for 2 minutes and hot air drying at 40 ° C. for 2 hours. The painted surface after hot-air drying is U07-60T at the paint temperature of 35 ° C.
The paint color was an approximate color of pink, the paint portion at a paint temperature of 20 ° C. became vermilion, a U07-50V approximate color, and the paint portion at a paint temperature of 5 ° C. became red, a U07-40P approximate color.

In Example 5, two types of glossy paints having a heat-sensitive gel property and having a paint temperature of 30.degree. C. and 8.degree. C. were prepared on the basis of a ceramic siding which had been previously treated with a primer. The composition of this paint used the paint of the above-mentioned composition 2. For painting, use two spray guns,
It was painted in a striped pattern so that the two spray patterns were parallel.

The paint at a paint temperature of 30 ° C. and the paint at 8 ° C. are adjusted to a viscosity of 30 ps which can be sprayed by dilution with water, and then applied on a ceramic siding with a spray amount of 300 g / m ^{2 using two} spray guns. did. The painted ceramic siding was dried by irradiation for 20 minutes with a far-infrared heater placed at a heating distance of 20 cm. The finish of the painted plate is as follows: a part using the paint at a paint temperature of 30 ° C. is a U75-60D approximate color which is a whitish gray color, and a part using the paint at a paint temperature of 8 ° C. is a U69-50D approximate color which is a gray color. became.

[0037]

According to the present invention, different color tones can be obtained from the same emulsion paint having thermal gel properties only by changing the paint temperature. Further, by simultaneously using a plurality of the same emulsion paints at different temperatures, a finished surface having a different color tone can be obtained by simply selecting the paint temperature. In addition, by changing the painting method and changing the pattern created by each paint,
By combining this heat-sensitive gel-based emulsion paint with various base materials, an unprecedented colorful pattern can be obtained.

Claims (4)

[Claims] 1. A method for using a heat-sensitive paint, wherein the color tone of a dried coating film is changed by selecting a coating temperature of an emulsion paint having a thermosensitive gel property. 2. Prepare two or more of the same emulsion paints having the same heat-sensitive gel property but different paint temperatures, and apply them in a state where these paints are not completely mixed on the same painted surface. A method for using a heat-sensitive paint, which is characterized in that it is formed into a film. 3. The coating temperature of the emulsion paint having a thermo-sensitive gel property is selected, and the one having a change in color tone is used as a plywood,
The method according to claim 1 or 2, wherein the coating is performed on an object arbitrarily selected from ceramic siding, metal siding, an ALC plate, an extruded cement board, a GRP board, a PC board, a nonwoven fabric, a woven fabric, and the like. Item 7. A method for using the heat-sensitive paint according to item 2. 4. Plywood, ceramic siding, metal siding, ALC plate, extruded cement board, GRP board, P
A film is formed on a base material arbitrarily selected from a C-plate, a nonwoven fabric, a woven fabric, and the like by using an emulsion paint having a thermosensitive gel property in which a paint temperature is selected and a color tone is changed. A cosmetic product using the heat-sensitive paint according to claim 1, 2 or 3.