WO2014025229A1 - Water-soluble inorganic paint to which heat-sensitive pigment is added - Google Patents

Abstract

The present invention relates to a water-soluble inorganic paint to which a heat-sensitive pigment is added, and more particularly, to a water-soluble inorganic paint to which a heat-sensitive pigment is added, the paint comprising 10 to 50 wt % of a nano-ceramic binder, 10 to 50 wt % of an inorganic mineral, 10 to 30 wt % of water, 10 to 30 wt % of alcohol, 0.5 to 5 wt % of the heat-sensitive pigment, and 1 to 10 wt % of an additive, the paint being heated and cured at a temperature of 200 to 400°C. The present invention has the advantages of providing a water-soluble inorganic paint which has excellent durability as the coating is prevented from being easily peeled off and color loss and discoloration is prevented, and which has excellent abrasion resistance and anti-contamination function by adopting a high-temperature curing method. The present invention further has the advantages of providing an eco-friendly water-soluble inorganic paint which is harmless to humans, which has an excellent drying time, adhesiveness, and workability, and which prevents the emission of volatile organic compounds and endocrine disruptors. The present invention further has the advantages of providing a water-soluble inorganic paint to which a heat-sensitive pigment is added, wherein the heat-sensitive pigment is added to the paint so to enable the paint to change to a colorless state at a specific temperature to thus enable the temperature to be determined and ensure safety by having such a property that enables the determination of the temperature.

Description

[Correction 29.08.2013 based on Rule 26.] Water-soluble inorganic paints with Zion pigments added

The present invention relates to a water-soluble inorganic paint added with Zion pigment, more specifically, 10 to 50% by weight of nanoceramic binder, 10 to 50% by weight of inorganic minerals, 10 to 30% by weight of water, 10 to 30% by weight of alcohol, Zion pigment 0.5 to 5% by weight, additives 1 to 10% by weight of the present invention relates to a water-soluble inorganic paint added to Zion pigment, characterized in that it is heat-cured at 200 ~ 400 ℃.

Today, there is more interest than ever in preventing various diseases caused by pollutants and improving the quality of life. Existing chemical paints and synthetic paints are toxic, and volatile organic compounds, environmental hormones, and formaldehyde are released in a large amount, which is not only harmful to the human body but is also flammable. I have a problem.

Paints are widely used in buildings, automobiles, ships, household goods, etc., and are closely related to our daily lives, so the paint industry focuses on minimizing the emission of harmful substances and developing paints that meet the content standards. Most of these materials are water-soluble or high-solid paints such as adhesives, binders, primers, etc., and have no odor and no environmental substances to maintain a clean environment.

On the other hand, Zion pigments are dyes that change color depending on temperature, and are classified into inorganic pigments and organic pigments. There are two kinds of reversible and one irreversible which changes color when the temperature is raised and then returns to the original color when the temperature is decreased. Combining a reversible Zion Pigment, you can see how it changes to different colors as you raise the temperature.

The Zion pigment has a grade that changes color depending on the temperature from -15 to 65 ℃, and also mixes two kinds of Zion pigments or combines Zion pigments and general pigments to produce different colors. As it is developed, it can be applied to various product demands, so there is a simple thermometer using it, and various items such as cups that change color when hot water is poured are appearing.

In this regard, a method for processing a cooking vessel and a cooking vessel for providing a suitable temperature for use by changing the color of the Zion pigment in the printing layer according to the temperature of heat transferred to the cooking vessel are disclosed in Korean Patent Publication No. 10-2010-0117502. Although it has been proposed, it has not been disclosed in detail with respect to the small-curing water-soluble inorganic paint added with Zion pigment.

In addition, Korean Laid-Open Patent No. 10-2006-0026630 discloses a food container that is converted into a predetermined color based on a predetermined temperature by mixing Zion pigments in a synthetic resin or the like at a predetermined ratio and coating or coating the Zion pigments on the surface of the solidified shape. Although a food container using Zion pigment and a method of manufacturing the same have been proposed, the method of coating is performed by curing at a low temperature, so that a metal cooking tool or a cleaning tool may be repeatedly used. When the coating film is easily peeled off and exposed to heat, there was still a problem that discoloration and discoloration.

The present invention has been made to solve the above problems,

An object of the present invention is to provide a water-soluble inorganic coating excellent in durability, abrasion resistance, anti-fouling function to prevent the coating film from peeling off easily or discoloring and discoloration by high temperature curing in the range of 200 ~ 400 ℃.

In addition, the present invention has another object to provide an environmentally friendly water-soluble inorganic coating that is excellent in drying time, adhesion, workability, harmless to the human body does not emit volatile organic compounds and environmental hormones.

In addition, the present invention is not only easy to identify the temperature according to the color change by adding Zion pigment, but also to provide a water-soluble inorganic paint containing Zion pigment which can be applied to warn the danger to ensure safety. have.

Water-soluble inorganic paints added with Zion pigment for solving the above problems, Inorganic binder 10-50% by weight; 10-50 wt% of inorganic minerals; 10-30% by weight of water; 10-30% by weight of alcohol; Zion pigment 0.5 to 5% by weight; and 1 to 10% by weight of the additive is characterized in that it is heat-cured at 200 ~ 400 ℃.

At this time, the inorganic minerals tourmaline, silicon oxide, alumina, loess, mica, amethyst, raw ore, bamboo charcoal, Uranite, precious stone, obsidian, ganbanite, photonite, zirconia, cerium oxide, calcium carbonate, talc, silica, mica , Kaolin may be selected from one or more groups.

At this time, the alcohol may be selected from the group consisting of methanol, ethanol, isopropyl alcohol, butanol.

At this time, the additive may be selected from the group consisting of thickeners, defoamers, emulsifiers, dispersants, surface control additives.

In addition, the water-soluble inorganic paint added with Zion pigment is to be used for kitchen utensils.

The present invention has the advantage of providing a water-soluble inorganic coating excellent in durability, abrasion resistance, anti-fouling function that the coating film is not easily peeled off or discolored and discolored through a high temperature curing method.

In addition, the present invention has another advantage of providing an environmentally friendly water-soluble inorganic coating that is excellent in drying time, adhesion, workability and harmless to the human body does not emit volatile organic compounds and environmental hormones.

In addition, the present invention has a further advantage in providing a water-soluble inorganic paint to which the Zion pigment is added, since the Zion pigment is changed to colorless at a specific temperature by adding Zion Pigment.

Hereinafter, the contents of the present invention will be described in more detail with reference to an embodiment of the present invention.

The water-soluble inorganic paint added with Zion pigment according to the present invention is 10 to 50% by weight of nanoceramic binder, 10 to 50% by weight of inorganic mineral, 10 to 30% by weight of water, 10 to 30% by weight of alcohol, 0.5 to 5% of Zion pigment %, Comprising 1 to 10% by weight of the additive is characterized in that it is heat cured at 200 ~ 400 ℃.

The nanoceramic binder is an inorganic binder, and when water is added, a chemical reaction occurs and has an adhesive property, and an eco-friendly water-soluble ceramic binder that does not emit volatile organic compounds is used.

In addition, the nanoceramic binder is an inorganic binder in a liquid state in which any one or more nanoparticles of alumina silicate, sodium silicate and calcium silicate are dispersed in water or in a solid state such as mud, cement, clay, or gypsum (calcium sulfate). Any one or more of inorganic binders can be selected and used.

At this time, the nanoceramic binder is preferably composed of 10 to 50% by weight based on the total weight of the water-soluble inorganic paint. If it is less than 10% by weight, it will not play a role as an adhesive even if water is added.If it exceeds 50% by weight, it will be in a state of high viscosity, which causes difficulties in painting.

The inorganic minerals are tourmaline, silicon oxide, alumina, loess, biotite, amethyst, raw ore, bamboo charcoal, uranite, noble stone, obsidian, ganbanite, ore, zirconia, cerium oxide, calcium carbonate, talc, silica, mica, kaolin One or more selected from the group consisting of can be used.

At this time, the composition ratio of the inorganic mineral is preferably contained in the range of 10 to 50% by weight based on the total weight of the water-soluble inorganic paint. If it is less than 10% by weight, the inorganic content in the coating composition is insufficient, so durability, wear resistance is less than the standard, if it exceeds 50% by weight can be deposited on the surface is not a neat appearance of the coating film.

The alcohol is preferably 10 to 30% by weight based on the total weight of the water-soluble inorganic paint, if less than 10% by weight does not play a role in dissolving other substances in the paint formulation, if the weight exceeds 30% by weight the inorganic paint is diluted When painting, the liquid flows down, making it difficult to work.

In this case, the alcohol may be used by selecting one or more from the group consisting of methanol, ethanol, isopropyl alcohol, butanol.

The Zion Pigment is red at 43 ° C. and becomes transparent at 45 ° C. or higher, and can be used in various colors by mixing paints. By applying this, not only is it easy to identify the temperature, but it also ensures the safety of the user by warning the danger.

At this time, the Zion pigment is preferably used in 0.5 to 5% by weight relative to the weight of the whole component.

If it is less than 0.5% by weight, it is not easy to recognize the change of color with temperature, and if it exceeds 5% by weight, differentiation and pinhole may occur due to the reduction of other components.

The additive may be used by selecting one or more from the group consisting of thickeners, antifoams, emulsifiers, dispersants, surface control additives.

In addition, the composition ratio of the additive is preferably 1 to 10% by weight based on the total weight of the water-soluble inorganic paint. If the additive is less than 1% by weight, the surface condition of the coating film is not good because the role of the surface control additive or the thickener is not properly performed. If the content is more than 10% by weight, the curing time is long and the durability, The heat resistance will not meet the conformance criteria.

In addition, the thickener is used for viscosity control, thickening and thixotropy, preventing sedimentation and improving redispersibility of particles and improving flowability, and improving storage stability of particles, thereby having an effect on paint properties and storage properties.

The antifoaming agent serves to improve the appearance of the coating film when the coating film is dried by removing air bubbles in the paint during manufacturing or operation of the paint. If the antifoaming agent is not used, bubbles are generated in the coating film. The appearance of the back coating film is poor.

If the emulsifier is in the oil phase and water phase in one system does not mix with each other, the interface between the two phases are generated. When the surfactant is added, the polar group of the active agent is dissolved in water and the non-polar group is dissolved in the oil phase to form a crosslink between the aqueous phase and the oil phase. Because it functions, an emulsifier is used for this purpose, and if the emulsifier is not used, problems may occur in layer separation and coating film formation of the paint.

The dispersant improves the dispersion of pigments and extender pigments in the paint to influence the visual effect and hiding power of the coating film and plays an important role in the production or storage and coating of the paint, the dispersant is an organic inorganic pigment as a wet dispersant for water-based paints Preference is given to using a dispersant.

The surface control additive smoothes the surface of the coating during operation to improve the appearance of the coating upon drying the coating, and improves problems such as insufficient wetting, poor wettability, cratering formation, color separation of the pigment, etc. during the formation of the coating. Play a role.

It is preferable that the said heating (baking) hardening is performed at 200-400 degreeC. When hardening work at less than 200 ℃, it does not have excellent durability and abrasion resistance, so it is easily peeled off, and when exposed to heat, discoloration or discoloration can not be maintained, and if it exceeds 400 ℃, painting work may cause deformation of the finished product. have.

Hereinafter, the contents of the present invention will be described in more detail with reference to an embodiment of the present invention. The following examples are only preferred examples of the present invention, and the present invention is not limited to the following examples.

Example 1

Example 1 for the present invention was composed of the composition ratio of 30% by weight of the nano-ceramic binder, 30% by weight of inorganic minerals, 30% by weight of the mixture of alcohol and water, 2% by weight of Zion pigment, 8% by weight of the additive.

Comparative Examples 1 and 2

Comparative Examples 1 and 2 for the present invention are the same as the composition of Example 1 and the nanoceramic binder, inorganic minerals, alcohol and water, and the mixture of Zion pigment and additives to give a change in the content of Zion pigment and additives, respectively, stirred at 2000 rpm for 60 minutes The content of each comparative example is as shown in Table 1 below.

Table 1

ingredient	Example 1	Comparative Example 1	Comparative Example 2
Nano Ceramic Binder	30	30	30
Inorganic minerals	30	30	30
Alcohol and water	30	30	30
Zion Pigment	2	7	0.1
additive	8	3	9.9
Sum	100	100	100

The nanoceramic binder was mixed with sodium silicate, alumina silicate and calcium silicate.Inorganic minerals were silicon oxide, cerium oxide, calcium carbonate, talc, mica, kaolin, and allool was selected from methanol and isopropyl alcohol. It was mixed with and used. Zion pigment is red at 43 ℃ and color is disappeared from 45 ℃. It is used as a Zion pigment.Additives include thickener (degussa), emulsifier (Rom & Haas), dispersant (TEGO ^® dispersant), surface control additive ( BYK) was used.

Comparative example

In the comparative example, the following experiment was carried out to confirm the effect of the water-soluble inorganic paint to which the Zion pigment according to the present invention is added. The paints prepared in Examples 1 and Comparative Examples 1 and 2 were made into Examples 1, 2, and 3, respectively, and a heat-curable water-soluble inorganic paint, which is commercially available on the market, was purchased and compared thereto. It was experimented together as.

1) Viscosity: measured with a Brookfield viscometer at 25 ° C.

2) Specific gravity: Pour the paint into the specified specific gravity cup at the paint temperature of 25 ℃ and measure the weight.

3) The state of solution in the container: There should be no hard mass or foreign substance in the contents, and it should be easily uniform when stirred.

4) Drying time (tack free): After curing in the laboratory space of room temperature (about 1 ℃ around 25 ℃) measured the curing drying. (Time when there is no fingerprint or press marks when slightly warmed and released with thumb)

5) Pencil Hardness: Measure hardness of coating film with Mitsubishi Pencil Hardness Tester.

6) Thermal Stability: Check the surface condition of the coating film after maintaining it at 300 ℃ for 12 hours.

7) Surface condition after painting: After painting, check the surface condition without any bubbles or stains on the painted surface.

8) Wear resistance: Wear loss should be less than 100g for 100 revolutions using CS18 wheel.

9) Accelerated weather resistance: After 500 hours of accelerated weather resistance test, there should be no cracking or swelling and no discoloration.

10) Adhesion: Draw 2mm 100 squares with a knife and attach it with 3M scotch tape. When it is quickly beaten with instantaneous force, there should not be more than 3 squares.

11) Workability: No spray or paint flow down or crater and color stains.

Each Example and Comparative Example was measured according to the above experimental items, the results are shown in Table 2 below.

TABLE 2

Experiment item	Example 1	Example 2	Example 3	Comparative example
Viscosity (cps / 25 ℃)	75.0	79.1	73.2	80.0
importance	1.25	1.23	1.21	1.20
Solution state in container	Good	Good	Good	Good
Drying time	80 sec	81 seconds	79 seconds	80 sec
Pencil hardness	9H	9H	9H	9H
Thermal stability	Good	Good	Good	Good
Surface condition after painting	Good	Good	Good	Good
Wear resistance	20.0 g	21.5 g	20.3 g	20.0 g
Promote weather resistance	Good	Good	Good	Good
Adhesion	100/100	95/100	100/100	100/100
Workability	Good	Bad	Good	Good
Color change (43 ℃)	Red	Dark red	Pale red	-
Color change (45 ℃)	Transparency	Transparency	Transparency	-

As shown in Table 2, Example 1 to which 2% by weight of Zion pigment was added, was bright red at 43 ° C or lower, and changed to colorless at 45 ° C or higher. Compared with the commercially available water-soluble inorganic paint, the comparative example without adding Zion pigment showed no change. Such a color change can give a useful effect to warn users of danger and ensure safety.

In Example 2, the addition of 7% by weight of Zion pigment resulted in a clear change in temperature due to the change of dark red color. Phenomenon and pinhole phenomenon.

In Example 3, 0.1% by weight of Zion pigment was added in a small amount. This resulted in a pale red color even under the optimum temperature of 43 ℃, so that it was not convinced that the temperature was appropriate. It was difficult to recognize the color change transparently above 45 ℃.

At this time, the water-soluble inorganic paints added with Zion pigment according to Examples 1 to 3 appear to have excellent durability, abrasion resistance, antifouling function, and also excellent thermal stability, thereby confirming that discoloration and discoloration will not occur.

In addition, the drying time, adhesion and workability can be said to be excellent in quality compared to the inorganic paints of the comparative example, and it can be assured that it is an eco-friendly water-soluble inorganic paint that does not emit volatile organic compounds and is not harmful to the human body. .

The present invention can be used to provide a water-soluble inorganic coating excellent in durability, abrasion resistance, anti-fouling function that the coating film is not easily peeled off or discolored and discolored through a high temperature curing method.

Claims (5)

1. 10-50% by weight of a nanoceramic binder wherein at least one of alumina silicate, sodium silicate, calcium silicate, mud, cement, clay, gypsum (calcium sulfate) is selected;

   10-50 wt% of inorganic minerals;

   10-30% by weight of water;

   10-30% by weight of alcohol;

   Zion pigment 0.5-5% by weight; And

   A water-soluble inorganic paint to which Zion pigment is added, comprising 1 to 10% by weight of additives and curing at 200 to 400 ° C.
2. The method of claim 1,

   The inorganic minerals are tourmaline, silicon oxide, alumina, loess, biotite, amethyst, raw ore, bamboo charcoal, uranite, noble stone, obsidian, ganbanite, ore, zirconia, cerium oxide, calcium carbonate, talc, silica, mica, kaolin Water-soluble inorganic paint added with Zion pigment, characterized in that at least one selected from the group consisting of.
3. The method of claim 1,

   The alcohol is a water-soluble inorganic paint added to Zion pigment, characterized in that at least one selected from the group consisting of methanol, ethanol, isopropyl alcohol, butanol.
4. The method of claim 1,

   The additive is a water-soluble inorganic paint added to Zion Pigment, characterized in that at least one selected from the group consisting of thickeners, defoamers, emulsifiers, dispersants, surface control additives.
5. The method according to any one of claims 1 to 4,

   The water-soluble inorganic paint to which the Zion pigment is added is a water-soluble inorganic paint to which Zion pigment is added, characterized in that it is used for kitchen utensils.