JPS6140382A - Luninescent spray paint - Google Patents

Abstract

PURPOSE:The titled paint, obtained by incorporating a phosphorescent pigment with a synthetic resin, light transmitting powder and organic solvent in a specific proportion, having improved luminescent effect, capable of solving problems, e.g. settling of the pigment and clogging of nozzles in spraying, and forming strong luminescent films. CONSTITUTION:A luminescent spray paint obtained by incorporating (A) 10- 40wt% phosphorescent pigment with (B) 5-50wt% synthetic resin, (C) 1- 50pts.wt., based on 100pts.wt. component (A), light transmitting powder and (D) an organic solvent, and more preferably mixing one or two or more colored (extender) pigment, plasticizer, stabilizer, brightener and propellant. An inorganic powder such as glass, mica or silica or organic powder such as plastic, cellulose or starch is used as the component (C), and preferably finely divided and together with the luminescent pigment is mixed in a suspension of the component (A) to radiate phosphorescence and fluorescence at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elegant luminescent paint for spraying to form a solid luminescent coating, which allows the paint to be sprayed without losing the luminescent effect of the luminescent pigment. This method solves various problems such as pigment settling and nozzle jamming, so that the process can be carried out safely.

In the present invention, the term "luminescent pigment" refers to pigments that emit phosphorescence or fluorescence. Phosphorescent pigments include sulfides such as zinc, cadmium, alkaline earth, rare earth, etc., which receive light from the outside and transfer the energy within the molecule. There are so-called phosphorescent pigments that emit light after the light is removed, that is, in the dark, and those that emit light due to chemical changes in their molecules or released energy within atoms, such as phosphorous compounds and radioactive elements. Fluorescent pigments are those that emit light of other wavelengths when exposed to external force or light; they do not emit light when the original light is removed, and there are also pigments that have been impregnated and fixed. Fluorescent materials are generally found in liquids, but even solid materials may emit diffracted light due to special surface conditions, especially in thin-layer materials and laminates thereof.

Paints containing these luminescent pigments are commercially available for various purposes.

However, conventional commercially available luminescent paints are mainly brush-coated, and spray-coated paints are not common. The reason for this is that luminescent pigments have a specific gravity of 4 to 5, which means they tend to settle and have poor dispersibility. In other words, in order to bring out the characteristics of luminescent pigments, it is necessary to increase the content in the coating film, and while this poses no problem when applied with a brush, spray-type pigments tend to settle, resulting in uneven coating and clogging the nozzle. It becomes unusable. Generally speaking, for pigment paints with a high specific gravity, the specific gravity is adjusted by blending pigments with a light specific gravity, that is, extender pigments.However, when a large amount of extender pigments is blended with luminescent pigments and fluorescent pigments, it blocks light. This causes interference with the accumulation or dissipation of light energy.

The gist of the present invention is to solve this problem. A concrete explanation of this is that a photo-acoustic transparent powder is blended.

That is, the addition of the photoacoustic powder allows a sufficient amount of light to reach the phosphorescent pigment in the coating film, and this serves to adjust the specific gravity.

In the present invention, specific examples of the optically transparent powder include inorganic powders such as glass, mica, and silica, and organic powders such as plastics, cellulose, and starch. Even though they are opaque in appearance due to the scattered reflection of the multilayer structure, they are optically transparent under a microscope. Thin-film slice powder is particularly good, and its redispersibility when it gradually settles is also extremely desirable. From the viewpoint of specific gravity adjustment, this does not mean that extender pigments are completely eliminated, but they may be added in combination as long as they do not interfere with the accumulation of light amount.

In this way, even if photoacoustic powder is blended to prevent pigment sedimentation, the phosphorescent pigment in the stock solution is 40wt.
% or more will cause problems in terms of redispersibility, and
If the amount is less than owt%, the luminescence will be unsatisfactory, so the amount should be 10 to 40wt%. On the other hand, the more photoacoustic powder is used, the better from the standpoint of sedimentation, but since adding too much will reduce the amount of luminescence, it should be kept at less than 50 parts by weight per 100 parts by weight of the luminescent pigment. It also varies depending on the type, but the minimum IW
It is necessary to mix t parts or more.

Next, a synthetic resin is blended in order to fix the luminous pigment and the photoacoustic powder onto the object surface as a coating film. Synthetic resins are soluble in solvents as much as possible, such as acrylic resins, meccrylic resins, nutylol resins, phthalic acid resins, urea-modified resins, vinyl resins, epoxy resins, latex, and other general paints. If weather resistance or other requirements are required, silicone-containing resins and fluorine resins are used, and if elasticity is required, butyl resins are also included, and one or more of these are blended. Unlike brush-applied products, the amount of resin used for spray applications is higher (this may cause stringiness and oil droplet formation during application.
Since the paint film does not come out clean, it should be less than 50wt%.Also, in order to fix the luminous pigment, it is necessary to use at least 0.5 times the amount of the pigment, so experimental results suggest that it should be in the range of 5 to 50wt%. More requested.

Considering from the opposite point of view, the maximum content of luminescent pigment in the formed coating film is 40÷(40+5+40X0.01)X10
0-88°10%, minimum value is 10÷(10+50+10X0.5)X10
It can be said that 0-15° is within a satisfactory range.

Further, the remaining amount is mixed with a solvent to enable spraying. Solvents include aliphatic and aromatic hydrocarbons,
It is necessary to combine alcohols, ketones, enethers, ethers, halogenated hydrogen chloride, etc. in a way that does not cause yuzu skin, cracking, drops, and whitening phenomena.

As mentioned above, we have explained the raw materials necessary for the product of the present invention, but other colored pigments, extender pigments, brighteners, stabilizers, anti-aging agents, reflective materials, dyes, etc. may be added as necessary. and use it.

Furthermore, the coating composition prepared above can be sealed in cans together with a propellant (LPG, dimethyl ether, CO2, N2, etc.) to form an aerosol product.

An example of the implementation of the luminescent spray paint of the present invention will now be described in detail as follows.

Example 1 An example of the mixing ratio of the luminescent pigment and synthetic resin in the luminescent spray paint of the present invention is shown.

Prescription (1) Yellow/phosphorescent pigment 25.0wt% Finely powdered silicic acid 5.0% Acrylic acid 30% Alcono 4 liquid 50.0% Solvent MEK
, BTX, 'BuOH8520.0% The above various chemicals were mixed to obtain 100 wt% of the product of the present invention.

When sprayed on a wall with a crystal spray gun, a phosphorescent paint film adheres to the wall. Immediately after 1 hour of 7olux irradiation, luminescence with a pattern that could be clearly discerned with the naked eye was observed for 2 hours.

Example 2 Prescription (2) Green/phosphorescent pigment 20.4wt% mica powder of 50μ or less 8.6% crystalline cellulose powder 2.5% soluble urethane resin 27.5% mixed organic solvent
The urethane resin obtained by mixing 46.0% of the above volatile agents was completely dissolved in an organic solvent to prepare the stock solution of the present invention. This stock solution 11o+J and 110 m/m of dimethyl ether were sealed in an Air Goo/I pressure can to obtain an Air Goo/I product. This aerosol causes less settling of the pigment and is sufficiently redispersed within 10 dips. By the way,
When the above formulation is air-filled with mica powder with a particle size of 5 μm or less and a stock solution that does not contain crystalline cellulose powder, the pigment settles and does not redisperse even after shaking 50 times.
It's too powerful to spray.

Example 3 Prescription (3) Luminous pigment 15.0wt% polyester foil powder 2.0% acetic acid vinyl/l
/309a acid X-fJ4 volume 5, Q% acrylic resin 80% alcohol solution 15.0%
CMC 2% aqueous solution 8.0% acetone 200% alcohol
200% Improper Tools
A product of the present invention was obtained by mixing 20.0% of the above drug. Phosphorescent pigments of various colors were used and placed in a Dinupenser to make spray paint.

Addition of a gelling agent such as CMC prevents pigment settling and provides a stabilized spray paint.

Regarding polyester foil powder, when a laminated product of these transparent thin films is used, diffraction appears and a special light emitting effect whose color changes depending on the viewing angle is exhibited by spectroscopy.

Furthermore, some have a liquid fluorescent agent applied between the laminated layers.

The luminescent pigments used in the luminescent spray paint of the present invention include yellow, orange, nucaret, violet, and blue.
When filled into air bubble pressure-resistant cans by color, such as , green, etc., it exhibits a special phosphorescent effect, and can be expected to last for more than an hour.

Claims (4)

[Claims] (1) In a stock solution made by blending a phosphorescent pigment, a synthetic resin, a light-transparent powder, and an organic solvent to form a composition, the phosphorescent pigment is 10 to 40 wt%, the synthetic resin is 5 to 50 wt%, and the light-transparent 1. A luminescent spray paint characterized in that 1 to 50 parts by weight of a luminescent powder is mixed with 100 parts by weight of a luminescent pigment. (2) A fluorescent pigment and a finely divided light-transparent powder are mixed into a suspension of a phosphorescent pigment so that phosphorescence and fluorescence can be emitted simultaneously.
Luminescent spray paint as described in section. (3) A claim characterized in that as the light-transparent powder blended into the luminous pigment as a composition, an inorganic powder such as glass, mica, or silica, or an organic powder such as plastic, cellulose, or starch is used. The luminescent spray paint according to item 1. (4) As the compounded components described in claim 1, colored pigments, extender pigments, plasticizers, stabilizers, brighteners, and
The luminescent spray paint according to claim 1, which comprises a mixture of one or more propellants.