KR20000066055A - Pigments composition for colors - Google Patents

Abstract

PURPOSE: A pigment composition for DANCHONG(the edge of the eaves) capable of maintaining a distinctive green color emitting high-intensity green fluorescent light as characteristics of conventional pigment (EMERALD GREEN) used in painting works for pattern painting and excellent in durability, light resistance and environmental pollution resistance is provided which does not contain toxic components and is useful as a substitute for conventional pigments. CONSTITUTION: A pigment composition, which has been traditionally used in Korea for painting a wall of a house or a temple comprises 38 to 43% by weight of titanium dioxide, 20 to 25% by weight of chalk, 11 to 19% by weight of permanent yellow, 12 to 20% by weight of cyanine green and 5 to 7% by weight of chrome yellow. The pigment composition has distinctive green color emitting high-intensity green fluorescent light, does not contain toxic components different from conventional pigments containing copper and arsenic as a main component and is environmentally favorable.

Description

Monochromatic pigment composition {PIGMENTS COMPOSITION FOR COLORS}

The present invention relates to a pigment composition, and more particularly to a mono-pigment composition to replace the sheep green in the pigment used in the mono construction.

Generally, pigments or dyes used to impart color to an object may be pigments or dyes. Pigments are generally white or colored inorganic or organic compounds which are insoluble in a medium such as water, oil, or a solvent. It is made of powder and has no performance of adhering to the object on its own but is adhered to the object with the aid of a vehicle or colored finely dispersed in the object. Among these, inorganic compounds are called inorganic pigments, and organic compounds are called organic pigments.

Originally used for monopolies of cultural property, mono pigments are usually introduced as natural pigments, that is, mineral pigments in China or western regions, but these pigments are not only difficult to obtain but also expensive. Pigments have been used.

However, these chemical pigments have problems such as pollution resistance, light resistance, heat resistance, water resistance, etc., and there are many problems such as discoloration and discoloration shortly after the construction of monochromium. The Institute (Cultural Heritage Management Bureau, Cultural Heritage Administration) jointly investigated the content of pigment components and impurities by the durability, light resistance, pollution resistance, heat resistance, water resistance test, color discoloration process experiment and chemical analysis According to the results of this demonstration, excellent monochromatic pigments with excellent color, convenience and economical efficiency were selected and standardized and used for monolithic cultural property until now.

Yangpi is a pigment that occupies more than 50% of the whole pigment used in such monochromatic construction and plays an important role in pattern coloring. Yangroc means Western paint, trade name is emerald green, and the chemical formula is Cu (CH ₃ CO ₂ ) ₂ .3CuO (AsO ₂ ) ₂ . Yang Lok is a unique and vivid green color with strong toxic resistance and weak pollution resistance such as discoloration by hydrogen sulfide and toxic pigment or green fluorescent light, which is difficult to replace as other inorganic and organic pigments.

However, Japanese sheepstalks, which had recently been used for monolithic construction, became toxic pollutants and were discontinued in Japan, and because of the combination of copper and arsenic (As), their toxicity is so strong that they are produced in Korea and around the world. This prohibition makes it impossible to use ammonium for monolithic construction, and there is an urgent need for the development of a replaceable pigment.

An object of the present invention is to provide a substitute pigment that can be easily available on the market, while maintaining the characteristics of the ammonium that has been conventionally used in mono construction, that is, bright green with green fluorescent light, and excellent in durability, light resistance, and pollution resistance.

The pigment composition according to the present invention is non-toxic and has excellent durability, light resistance, and pollution resistance, but in order to give off a color such as sheep green, Titanium Dioxide R760, Chalk, Permanent Yellow, Cyanine Green, Cyanine Green) and Chrome Yellow, more specifically 38-43% by weight, 20-25% by weight, 11-19% by weight Hansa, 12-20% by weight cyanine green and 5% chromium yellow 5 -7 wt%.

Pigments are classified into inorganic pigments and organic pigments, and are divided into colored pigments and white pigments depending on the color tone, and may be classified into colored pigments and extender pigments depending on the use. Sieving pigments are also called transparent white pigments, and since the refractive index is small and close to the refractive index of the colorants such as linseed oil, they are transparent when mixed with the colorants, and are used collectively for pigment extenders, paints, ink quality regulators, and sieving pigments. Say.

In addition, it is important to select an adhesive for binding a pigment. In the past, an animal glue was used as an adhesive for mono pigments, and dry oil such as perilla oil was applied thereon for water-resistant parts. Animal glue is very excellent in the adhesive strength and adhesive strength of its own, and the soft touch of the brush has a very convenient advantage to monochromatic, but there was a problem in water resistance and anti-rust. The use of glue as an adhesive was very ugly due to the washing of the monolithic parts by leaking water, and it was often damaged or discolored at high temperature and humidity during the rainy season, thereby damaging the appearance of the monolithic parts. In addition, in recent years, the use of organic pigments more than inorganic pigments has been a lot of problems in durability when manufacturing a mono paint by mixing organic pigments and glue. In order to solve this problem, synthetic resin is used. In the present invention, it is widely used as an outdoor adhesive, and a lot of water is used as a diluent, but once the coating film is formed, acrylic resin is used that is not easily dissolved by water and is resistant to water.

Hereinafter, the characteristics of each component contained in the pigment composition according to the present invention will be described in detail.

1.Lactose (Titanium Dioxide R760)

Lactose is a white inorganic pigment, also called white titanium, has a specific gravity and is most chemically stable. Under natural conditions, light resistance, pollution resistance, acid resistance, alkali resistance, coloring power, and hiding power are the most excellent among white pigments, but they are expensive. Usually, there are two types of anatase and rutile type depending on the crystal form. The anatase type has high whiteness but poor hiding and choking resistance. The rutile type has slight yellowness but good hiding power, coloring power and weather resistance. good. Color Index Number (CINo) of the land sugar is 77891 and the chemical formula is TiO ₂ .

2. Chalk

As a white inorganic pigment, calcium carbonate (CaCO ₃ ) is a main component and is also called shellfish. Oysters and shellfish are baked and crushed. They are often used as high-quality white pigments and are used as anti-settling agents for pigments in addition to oil paints. In Korea, because of the good quality of Yeosu, it is used as a standard of Yeosu, and it is generally used as an additive of pigment.

3. Permanent Yellow

As a yellow organic pigment, it has excellent light resistance, water resistance, acid resistance and alkali resistance, but its use is limited because of its low solvent resistance and heat resistance, and it is a pigment suitable for emulsion paint or lead-free paint. Hansa's Color Index Number (C.I.No) is 11680 and the chemical formula is as follows.

4. Cyanine Green

Cyanine Green is also known as Phthalo Cyanine Green and Chlorinated Copper Phthalo Cyanine Green. It has a high coloring power, excellent light resistance, heat resistance, water resistance, chemical resistance, solvent resistance, and generally It is a turquoise phthalocyanine type organic pigment, and when a extender pigment is added, it becomes vivid green. Cyanine green is a large amount of chlorine substituted in the benzene nucleus of phthalocyanine, and some or all of the chlorine is replaced by ortho-. In general, cyanine green is mainly used as a pigment of lacquer, oil paint, emulsion paint and baking paint. Color index number (C.I.No) of cyanine green is 74260, and the chemical formula is as follows.

5. Chrome Yellow

Yellow inorganic pigment, ranging from yellow to reddish yellow close to green. It is the most widely used among yellow pigments because of its relatively low price and excellent performance, and its properties are slightly different depending on the color, but it is almost invariant to sunlight due to its safety against oxygen or ultraviolet rays, and it is a pigment that has good coloring power and hiding power, but it is weak in chemical resistance and especially sulfur compound. It is easy to turn black by Color Index Number (CINo) of chrome yellow is 77600 and chemical formula is PbCrO ₄ .

In fact, the most important factor in developing alternative pigments of sheepsocks is to maintain the properties of the sheepsocks that have been used so far, and the present inventors noticed that the sheepshoe is green and yellow fluorescent light. Sheep green substitute pigments were prepared.

Hereinafter will be described an embodiment of the pigment composition according to the present invention. However, the scope of the present invention is not limited to the examples.

Example 1

A pigment composition was prepared by mixing 40.4% by weight, 20.2% by weight of arc, 19.2% by weight of Hansa, 14.1% by weight of cyanine green, and 6.1% by weight of chromium yellow.

Example 2

23.2% by weight, 29.0% by weight, 27.5% by weight of Hansa, and 20.3% by weight of cyanine green were mixed with a carrier to prepare a pigment composition.

Example 3

A pigment composition was prepared by mixing 39.1% by weight, 21.8% by weight, 15.2% by weight of Hansa, 17.4% by weight of cyanine green, and 6.5% by weight of chromium yellow with a carrier.

Example 4

A pigment composition was prepared by mixing 38.6% by weight, 22.7% by weight of arc, 11.4% by weight of Hansa, 15.9% by weight of cyanine green, and 11.4% of fluorescent pigment with a carrier.

The pigment compositions prepared in Examples 1, 2, 3 and 4 were called Pigment 1, Pigment 2, Pigment 3 and Pigment 4, respectively, and their performance was tested as follows.

1. Test piece production

In general, cut the meat used in the reconstruction work of cultural assets wood to 5cm wide, 15cm long, 0.5cm thick and smooth the surface to cover the greenish green, then leave it at room temperature and dry it. The pigment composition prepared in Pigment 1, Pigment 2, Pigment 3, and Pigment 4 was overlaid, and the same test piece was treated with the same adhesive in order to minimize errors caused by differences in test conditions. The treated specimens were dried for about two days in the same room and tested.

2. Accelerated weathering test (artificial weathering test)

The accelerated weathering test was performed for a total of 120 hours in accordance with Test Method 3231 of KS Regulation KSM-5000-1990, and the surface was observed using chromaticity measurement and microscope every 20 hours after the test.

(1) Name of test equipment: Artificial weathering tester (Weather-ometer, Model No. Ci65A, ATLAS ELECTRIC DEVICES Co., USA)

(2) Test conditions: Test time was 120 hours, 2 hours were 1 cycle and 102 minutes were exposed to ultraviolet rays without spraying water, and 18 minutes were exposed to ultraviolet rays with spraying water. %, And was adjusted to 0.35W / ㎥ at 340nm wavelength. 120 hours corresponds to 120 days in the worst climatic conditions of the atmosphere.

(3) Examination of color and surface change: After every 20 hours, the specimens were photographed and photographed using a microscope (Nikon SMZ-2T) to observe the surface (30 times magnification) and the colorimeter (Chroma meter, Model CR-200) , Minolta, Japan) was used to measure the color.

The degree of color change is determined by Lab Colorimetric System according to KS A 0063.

(ΔE). The color difference calculation method using the Lab colorimeter is as follows.

ΔE =

ΔL: Difference in brightness index of two object colors

Δa, Δb: Difference between Chromacheckness Index indicating Color and Saturation

(4) Test result

Table 1 shows the results of the color difference between the measured color and the green color of the substitute pigment before the test.

Measurement of color before test and color difference Test piece Before the test Color difference with sheep green Color difference (ΔE) Remarks L a b ΔL Δa Δb Pigment1 60.21 -40.22 13.10 5.31 9.97 1.42 11.38 Pigment 2 61.67 -44.24 14.85 3.86 5.95 0.33 7.10 Pigment 3 61.19 -44.68 4.34 4.34 5.51 1.78 7.24 Pigment 4 64.75 -53.62 0.78 0.78 3.43 4.51 5.72 Fluorescent Pigment Sheep 65.53 -50.19 - - - - - Sheep

In Table 1, the pre-test state of the test piece, Pigment 1-Pigment 4 was similar in lightness (L), but there was a slight difference compared to Yangkwang. Pigment 4 prepared using a fluorescent pigment was 64.75, which was the most similar to sheep's green. In the color difference (ΔE), pigment 4 prepared using fluorescent pigments was 5,72, similar to that of yang green. Pigment 2, which used only Hansa without chrome yellow, did not show color change.

The weather resistance test results are shown in Table 2.

Weather resistance test color measurement result Test piece Before the test After the test Color difference (ΔE) Remarks L a b L a b Pigment1 60.21 -40.22 13.10 57.37 -40.58 10.71 3.92 Pigment 2 61.67 -44.24 14.85 57.21 -42.95 12.48 5.21 Pigment 3 61.19 -44.68 4.34 61.39 -42.18 13.83 3.52 Pigment 4 64.75 -53.62 0.78 61.67 -35.81 -1.74 27.53

3. Pollution resistance test

Sulfur dioxide is known as a pollutant that has the most influence on mono among air pollution by acting on inorganic pigments along with moisture in the air and degrading black sulfide or pigment itself. Therefore, the air pollutant that causes the most fading and discoloration of the mono pigment in recent years is sulfur dioxide (SO ₂ ). The pollution resistance test was performed for a total of 150 hours, and the surface was observed by chromaticity measurement and microscope every 20 hours after the end of the test.

(1) Name of Test Equipment: Gas Corrosion Tester (Gas Exposure Cabinet, Model No. GE-15, ATLAS ELECTRIC DEVICES Co. USA)

(2) Test conditions: The test period was 150 hours, adjusted to 2 ppm sulfur dioxide concentration, 45 ℃, 65%.

(3) Investigation of color and surface change: Photographs were taken every 20 hours after the test, and the surface (30x magnification) was observed using a microscope (Nikon SMZ-2T) and chromaticity meter (Chroma Meter, Model CR-200) , Minolta, Japan) was used to measure the color.

(4) Test result

Pollution resistance test results are shown in Table 4. In Table 4, there was almost no color change in the sulfur dioxide exposure of the test specimens, which showed excellent durability and no surface cracks, making it impossible to compare. In other words, the annual average concentration of sulfur dioxide was 0.221ppm in 1971, and our country's environmental policy cleared that the concentration of sulfur dioxide was decreasing to 0.094ppm in 1980, 0.051ppm in 1990 and 0.013ppm in 1996. Since no problem was found in the results of testing at concentrations of 100 times more than the concentration of sulfur dioxide in the current atmosphere (2 ppm), the alternative pigments of the green and yellow according to the present invention have excellent pollution resistance.

Pollution resistance test color measurement result Test piece Before the test After the test Color difference (ΔE) Remarks L a b L a b Pigment1 60.36 -41.52 13.17 59.87 -40.98 12.71 0.86 Pigment 2 61.47 -44.13 14.67 61.21 -43.95 13.48 1.23 Pigment 3 61.26 -43.47 16.38 60.89 -42.98 16.15 0.66 Pigment 4 66.46 -54.39 19.21 66.17 -53.81 18.74 0.80

In the pigment industry, inorganic pigments mainly composed of metals such as arsenic, mercury, copper, and lead accounted for a large portion, but the demand for inorganic pigments will gradually decrease and the demand for organic pigments will increase rapidly. This is because most inorganic pigments that use heavy metals in terms of environmental problems such as GR will be subject to many restrictions. In this international trend, there is a need to develop alternative pigments free of metals.

The pigment developed by the inventors of the present invention is a pigment composition that is more suitable for the environment because it has a characteristic close to that of a green leaf, i.e., a bright green color with green fluorescent light, and does not contain a toxic ingredient unlike a green leaf containing copper and arsenic as a main component. It is a suitable substitute pigment that can replace sheep green.

Claims (3)

Mono-pigment composition characterized in that it comprises a fat (Titanium Dioxide), chalk, Permanent Yellow, Cyanine Green and Chrome Yellow. The mono pigment composition according to claim 1, wherein the mono pigment composition comprises 38-43% by weight, 20-25% by weight, 11-19% by weight of Hansa, 12-20% by weight of cyanine green and 5-7% by weight of chromium yellow. Mono pigment composition, characterized in that. The mono pigment composition according to claim 2, wherein the mono pigment composition comprises 39.1% by weight, 21.8% by weight, 15.2% by weight of Hansa, 17.4% by weight of cyanine green, and 6.5% by weight of chromium yellow.