JP2013253167A - Method for manufacturing light-accumulating pigment coated on surface with silicon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming a uniform-quality surface film which is not deteriorated by an influence of a chemical reaction of a light-accumulating pigment with another substance in contact therewith, since the necessity of coating the light-accumulating pigment lies in which the light-accumulating pigment has its light-accumulating action only in a neutral environment, loses its light-accumulating action by the influence of mixing with a non-neutral binder and loses water resistance, and the surface of the light-accumulating pigment therefore needs to be coated with a suitable material in order to prevent such an unnecessary reaction.SOLUTION: Operations of emitting materials upward against the gravity are continuously carried out; when materials earlier emitted lose its energy and fall down by the gravity, the materials collide with and contact with successively emitted materials; thereby, the difference in the mixing condition due to the difference in the specific gravity between substances having specific gravity differences is eliminated, and the materials are uniformly mixed to thereby form uniform films.

Description

The present invention relates to a method of forming a uniform surface film on a phosphorescent pigment by bringing a material into contact with each other under uniform conditions while eliminating the influence of a specific gravity difference using gravity.

The need to coat the phosphorescent pigment is as follows. Phosphorescent pigments can have a phosphorescent action only in a neutral environment, and when mixed with a binder other than neutral, they have a property of reacting and changing to eliminate the phosphorescent property and water resistance. For example, many attempts have been made to make a luminescent mortar by adding a phosphorescent pigment into a mortar that is mixed with cement and water. This is because when cement is added with water, it chemically reacts and becomes a strong alkali having an HP of 12 to 13, which destroys the luminous properties of the luminous pigment. In addition, in attempts to make phosphorescent glass in addition to glass, most of the raw material is alkali glass, and chemical reaction with the lead component contained in the constituent material of the glass impairs the luminous property. In order to prevent such an unnecessary reaction, the surface of the phosphorescent pigment must be coated with an appropriate material.

JP 2009-126769 A

The necessity of coating the phosphorescent pigment is as described above. To overcome this, the surface of the phosphorescent pigment may be coated with a stable material that is water resistant and not affected by alkalinity.

The present invention relates to a method for forming a uniform surface film, in which a phosphorescent chemical does not chemically change with other substances that come into contact with the phosphorescent pigment and is not affected and altered.

The present invention has been made to solve the above-mentioned problems. When the material is released continuously against gravity, the material released earlier loses energy and falls by gravity. Then, by contacting the released material by collision, eliminating unevenness of mixing conditions due to the difference in specific gravity between substances having specific gravity differences, mixing them in an even state, and forming an equivalent film Settled.

When the powder is coated on the surface, it is difficult to carry out since substances with high fineness condense with each other. Although it can be carried out by the dipping method, the material used for coating is wasteful and inefficient. According to the method of the present invention, it is possible to efficiently form a film with less waste. Using a phosphorescent pigment having a silicon film molded by the method of the present invention, a phosphorescent mortar block indicating a parking position was manufactured and installed in an outdoor parking lot. The luminance of the phosphorescent mortar block immediately after sunset in fine weather was 7624 mcd / m 2, but the luminance measured after being exposed to wind and rain outdoors for 2 years and 7 months was 6978 mcd / m 2. The difference in luminous intensity was considered to be the difference in input light energy due to the intensity of sunlight, and no effect on the decay of the luminous effect on the luminous pigment by cement was observed.

FIG. 1 is a cross-sectional view of a phosphorescent pigment having a silicon coating formed thereon.

  Embodiments of the present invention are described in detail below.

Necessary requirements for the coating material are transparency that does not block the light of the phosphorescent pigment, chemical reaction with the phosphorescent pigment, and alkali resistance and acid resistance. Among many raw materials, silicon has the property of not reacting with other raw materials and satisfies the requirements required for this invention. A silicon that meets this purpose is a silane coupling agent.

The method of carrying out the coating is described below.
The specific gravity of the phosphorescent pigment is 3.8, but the silicon used as the coating material is 2.33.
When materials with different specific gravity are mixed, heavy objects sink below, light objects overlap, and they do not mix evenly. it can. When the concentration of the coating material is high, the coating film is thick, and when the concentration is low, the coating film is thin. In order to achieve uniform quality, the coating material concentration must be uniform. However, mixing under the action of gravity is unavoidable in situations where specific gravity is applied. To solve this situation, it is only necessary to mix in the space where gravity does not act.

The method of the present invention is a method in which the influence of gravity is cut off and mixed to complete the coating.
Described below. When an object is released into the air, it begins to fall at the peak of acceleration. At the moment when the acceleration becomes zero and the fall starts, the weight becomes zero and the state of weightlessness is reached. Thereafter, the fall falls while gradually increasing the fall acceleration. If this condition occurs continuously, when the first released material falls, it encounters and contacts the next discharge. At this point, the gravity action of each material appears to be very close to zero. In such a case, the conditions for mixing and contacting are equal, and a heavy material and a light material are layered, and light and shade due to specific gravity in which the mutual contact between the materials is not uniform does not occur. Until the acceleration of the material changes from minus G to + G, there is no difference in film thickness due to the influence of the specific gravity in the state of no weight force, and coating can be performed in an even situation.

Om has a mixer called a mixer. The bottom plate, which is surrounded by rubber that moves around and is made of steel and attached at an inclination angle of 14 degrees with respect to the central axis, rotates the substance contained inside the mixer with the rotation of the axis. The inclined bottom plate moves up and down by the difference in the position of the inclination angle, so that it is pushed upward with an acceleration of minus 7G. When the accelerated acceleration reaches zero, it begins to descend, but it encounters and comes into contact with the continuously thrusting substance, and substances with different specific gravity are mixed under the influence of the same situation, so a homogeneous situation appears To do.

A specific method for surface coating the phosphorescent pigment using this mixer is described below. Silicon used as a coating material includes oily silicone oil and emulsion, and as an application product thereof, there is a room-temperature curable silane coupling agent which is generally used for a coating agent. Since this material can be diluted with water, the film can be thinned. Silicon has a low viscosity and can make the film thin, but when the film is thin, it is nearly transparent and can transmit light. It does not decompose even in an atmosphere at 250 ° C., and neither discoloration nor deterioration occurs. There is little deterioration by ultraviolet rays, and it has excellent weather resistance. After curing, it is water repellent and modified to an inorganic material close to glass, so it is the best coating material to achieve the purpose.

Examples will be described. When a surface coating is formed on a phosphorescent pigment using room temperature curing type silicon coating agent X-40-2327 manufactured by Shin-Etsu Chemical Co., Ltd. Into the box. Next, an amount sufficient to form a film thickness of the silicon emulsion previously blended is sprayed onto the luminous pigment scattered in the rotating om in the mixer. One manufacturing time is 20 seconds. The silicon emulsion to be sprayed is produced by mixing silicon 5 to 10 with anhydrous alcohol 95 in a weight ratio. After that, when it is naturally dried for 24 hours or more, or put in a dryer and dried at 200 ° C. for 30 minutes to be in an absolute dry state, a strong film having a glassy pencil hardness of 5H and a thickness of about 10 microns can be formed.

The only products using phosphorescent pigments were plastic products before this invention was made. This is because phosphorescent pigments work only in a neutral environment, and binders of other environments such as cement and glass could not be used. By covering the surface of the phosphorescent pigment with a silicon film, the phosphorescent property is not lost even in a strong alkaline environment, and it can be used for cement products, glass products, and steel products that are pickled.

1 Luminescent pigment 2 Silicone coating

Claims (2)

By continuously performing the work of releasing the material upward against gravity, so that when the previously released material loses energy and falls by gravity, it will subsequently come into collision contact with the released material A method for forming a film of a phosphorescent pigment, characterized in that a uniform coating is formed by eliminating a difference in mixing conditions due to a difference in specific gravity between substances having a specific gravity difference and mixing them uniformly. A phosphorescent pigment having a silicon film, which is molded according to claim 1.

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