JPH0920829A - Coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject coating material capable of bringing out smoothness and good touch feeling characteristic of a coating film formed on the surface of a product, etc., by mixing fine gelatin powder into a solvent. SOLUTION: Gelatin powder or granules are pulverized with a jet mill and classified to afford gelatin powder having particle size finer than 6μm and the gelatin powder is mixed and blended with a solvent such as dimethylformamide and toluene to afford a part of coating material component. Furthermore, pulverization is preferably carried out using gelatin having 100μm average particle diameter, in the conditions of 6-8kg/cm<2> pressure of jet air jetted into a jet mill and air temperature cooled to -15 deg.C.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a resin coating material containing crushed gelatin powder.

[0002]

2. Description of the Related Art Gelatin is a kind of derived protein which is insoluble in organic solvents, has a characteristic that it swells in cold water and dissolves in warm water to become a highly viscous sol, and at a concentration of 2 to 3% or more, it is a greenhouse. It is used as a modifier for synthetic rubber because of its property of forming an elastic gel.

Further, in order to provide similar stretchability to a coating film provided on the surface of various products, to provide a function of absorbing and releasing moisture, and to simultaneously provide a water-repellent function and a ventilation property, these coatings are used. Attempts have been made to incorporate gelatin into the paint that creates the coating.

[0004] As a result of many experiments, the gelatin contained in these paints has a smaller particle size.
It has been shown to bring a unique effect to the formed resin coating film.

[0005] In particular, in order to provide a smooth feel and a unique feel without sweating characteristic to a coating film formed on the surface of a product or the like and a specific hand feeling, the particle size of gelatin powder contained in the coating film is required. It was convenient to make the values in a finer range.

Therefore, gelatin that has been powdered or granulated has been pulverized with a dry ball mill or the like, and classified before use.

[0007]

However, in the conventional method of pulverizing with a ball mill, it is difficult to re-pulverize gelatin, and a pulverized gelatin powder having a uniform quality and a uniform fine particle size is obtained. I couldn't produce it.

[0008] Further, such a characteristic peculiar to gelatin is impaired, or a resin coating film produced by using crushed gelatin powder mixed with gelatin powder having a relatively large particle size has peculiar smoothness and touch. It has a drawback that it does not give a feeling, and does not provide a moisture absorbing / releasing function, a stretching function, a water repellent function, etc. peculiar to gelatin mixed in this coating film.

In particular, in the crushing by the simple method of crushing and grinding by the dry ball mill which is the conventional method, in this crushing,
A large amount of heat was generated due to the grinding, and various inconveniences were caused by this heat generation.

First, the heat generated during the pulverization by the ball mill may sometimes cause the gelatin being pulverized to be partially in a viscoelastic gel state, and it often happens that the gelatin cannot be efficiently pulverized into fine powder. Alternatively, powdery or granular gelatin is fused together to form a viscoelastic block. In particular, such inconveniences occurred remarkably, for example, when the water content of the gelatin to be pulverized was high, or when the gelatin was pulverized under humid conditions.

Next, when water is rapidly removed from the gelatin being crushed by the heat generated during the crushing by the ball mill, the hydrophilicity of the crushed gelatin powder is impaired, and the swelling by the water or the elution function to hot water is lost. In particular, the crushed gelatin powder based on crushing under the condition that the water content in the crushed gelatin is less than 2% by weight has such viscoelasticity and adhesion as to the gelatin powder, including its hydrophilicity. It has a drawback that various properties such as elasticity and stretchability are impaired.

From this point of view, in order to pulverize powder or granular gelatin by the pulverization method using a dry ball mill, the heat generated by friction during pulverization is accumulated as much as possible, or the friction heat is excessively generated. I needed to crush it slowly, taking a long time to avoid it. For this reason,
The crushing efficiency of gelatin was poor, and the particle size of the crushed gelatin powder to be finished had to be stopped within a relatively large range, and a finer gelatin powder could not be obtained.

Therefore, powder or granular gelatin is mixed and mixed with a liquid polymer or a resin solution diluted with various solvents, and the powder or granular gelatin mixed with the liquid polymer or resin solution is charged into a wet pulverizer. And then crushed.

The wet pulverization method has the drawbacks that the flow resistance of the liquid polymer or resin solution is large, stirring and pulverization are not performed smoothly, and the mixed gelatin is not uniformly dispersed in the polymer. Was. In particular, when the stirring of this kind of liquid polymer or resin solution is continued, the viscosity of these polymer or resin solutions tends to increase with time, and it may be difficult to perform a smooth pulverization treatment by a wet pulverizer. In many cases, when the pulverization temperature in the pulverizer was increased with the stirring of the pulverizer, such inconvenience on pulverization tended to occur more remarkably.

When gelatin is crushed by a dry ball mill, the device itself is provided with a cooling or exhaust device for removing the heat generated by the friction or impact, or a device for keeping the water content of gelatin constant. However, the crusher itself has the drawback of being large-scale.

Further, when powdered or granular gelatin is crushed by such a dry ball mill, the particle size of the gelatin powder produced varies depending on various conditions such as temperature and humidity in the crusher or agitation speed of the ball, resulting in a long particle size. Even if the powder is pulverized for a long time, the gelatin powder having a large particle size remains in the gelatin powder having a fine particle size.

In particular, when powder or granular gelatin is pulverized by such a dry ball mill, the particle size is 1.0 micron (in the case of elongated particles, the measurement is made on the short side.
Display as m. ) To about 50 μm, a gelatin powder having an extremely fine particle size is produced, but a considerable amount of gelatin powder having a relatively large particle size remains, which is caused by a ball mill for a long time. The same was true when crushing was continued.

As a result, when these gelatin powders are contained in a resin material such as a polyurethane resin solution to form a sheet or film, a part of the mixed gelatin protrudes from the surface of the sheet or film, and this causes In addition to giving a rough feeling to the surface, edge breakage easily occurs between the peripheral portion of the large gelatin particle and the sheet or film, and the large particle diameter of the gelatin particle falls off from the sheet or film, or from the portion. However, there was a problem that the surface of the film was cracked.

Particularly, the disadvantages associated with uneven particle diameters of gelatin powder on the above-mentioned surface remarkably occur when the gelatin powder is mixed and used as a paint.

Further, in the method for pulverizing gelatin powder by a dry ball mill and the paint using the pulverized gelatin powder, granular or powdery gelatin is pulverized in a state of water content of about 10 to 15% by weight, and this is It is to be mixed with various paints in its original state. However, when such a gelatin powder is mixed with a paint, the finer the gelatin powder mixed, the more it tends not to be dispersed smoothly in the paint, and especially the target coating liquid has a viscosity. In this case, there is a drawback that the coating liquid is not uniformly dispersed.

Further, when the gelatin powder is mixed as a constituent of the coating film, the gelatin powder having a large particle diameter contained in the constituents of these paints forms the surface of the coating film when forming the coating film. However, there is a problem in that it causes streak-like scratches or clogging of the spray gun.

In view of the inconveniences in the conventional examples, the present invention eliminates the adverse effect on the crushed gelatin caused by the heat generated by the friction generated during the crushing of powdery or granular gelatin powder, and also provides a uniform grain in a short time. It enables the pulverization and molding of fine gelatin powder with a diameter, and does not impair the quality peculiar to gelatin, and forms a gelatin powder with a uniform particle size using a jet mill. The purpose of the present invention is to provide a paint in which gelatin powder is uniformly mixed by preparing it in a suspension form.

[0023]

Means for Solving the Problems In order to achieve the above object, the paint according to the present invention mixes gelatin powder finer than 6 μm crushed by a jet mill into a solvent, and mixes the mixed gelatin powder. It is composed by mixing it with a powder-containing solvent in a paint.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a paint according to a typical embodiment of the present invention will be described.

Solid gelatin which is usually prepared as white powder which is tasteless and odorless or which is transparent flakes (in this case, gelatin is mainly industrial gelatin, but gelatin of various properties and concentrations may be used. Is also added to a jet mill in the state of air-dry water content (water content in the state of being left in the air = equilibrium water content) and pulverized. The pulverization by the jet mill is continued until the particles of the pulverized gelatin powder are in a range smaller than 6 μm in a state where the gelatin is not contacted and ground by the jet air.

Further, in order to make the particle size of the gelatin powder crushed by this jet mill uniform and to crush the crushed gelatin to the target particle size in a short time, the jet air used in the jet mill is The gelatin powder is jetted into the crusher as about 15 ° C., and the gelatin powder to be put into this jet mill is classified.
Fine gelatin powder belonging to a range smaller than μm is preferably classified by a sieve or an air classifier so as to be 90% by weight or more of the total amount of the gelatin powder.

The pulverization by the jet mill is continued until the grain size of the introduced particles or powdery gelatin becomes finer than 6 μm. Therefore, the grinding conditions such as the grinding time by the jet mill are as follows: the capacity of the jet mill, the air pressure and the air input amount used in the jet mill, the type and input amount of the gelatin to be input to the jet mill, and the jet mill. Although it may be changed as needed depending on various conditions such as the grinding temperature, it is necessary to grind the gelatin within the range where the temperature of the jet air during the grinding is not increased as much as possible so as not to deteriorate the quality of the ground gelatin.

Further, in order to make the crushing by the above-mentioned crusher more effective, the crushed gelatin is pre-crushed and the particle size thereof is determined by air classification by true specific gravity or sieve classification by bulk. They are prepared and usually prepared by crushing with a dry crusher such as a turbo mill.

Further, the air used for crushing in this jet mill is dehumidified by cooling to about -15 ° C. to suppress the temperature rise due to impact crushing occurring in the jet mill as much as possible.

The average particle size of gelatin put into this jet mill is 100 μm, and jet air jetted into the jet mill is 6 kg / cm ^{2 to} 8 kg / cm ^2.
Moreover, when the air was cooled to -15 ° C and used, the hydrophilicity of the crushed gelatin was not impaired, and a gelatin powder having a particle size finer than 6 µm was obtained in a very short time compared with crushing by a dry ball mill. We were able to.

Since the gelatin is crushed by the air of the jet mill in this manner, the gelatin being crushed rarely melts, swells, or becomes hard due to the heat generated during the crushing, and the crushing is performed. It has the feature that the moisture absorption and desorption phenomenon of gelatin inside is small. As a result, in the process of grinding the gelatin, the water content of the gelatin is not increased, and the gelatin does not fuse with each other or become soft and unsuitable for grinding or impact grinding.
Further, the quality does not deteriorate until the water content of the gelatin is reduced in the process of grinding the gelatin and the hydrophilicity is impaired. The gelatin powder pulverized in this manner is mixed with a solvent and used for molding a paint or a resin.

Example 1 Gelatin was pulverized with a turbo mill in the air-dry water content state and classified to have an average particle size of 34 μm. The water content of this gelatin powder was 12% by weight, but in actual grinding of gelatin powder, it was possible to use gelatin powder having a water content in the range of 5 to 15% by weight. 8 kg of crushed air of a jet of gelatin having an average particle diameter of 34 μm
/ Cm ² and a classification rotor at 7,000 rpm for 60 minutes, and gelatin powder having a particle size of less than 6 μm was produced while sequentially performing classification correction. The particle size distribution of the gelatin pulverized by this jet mill is as follows. The pulverized gelatin powder was classified by an air volume classifier based on the true specific gravity to obtain a gelatin powder having a range smaller than 6 μm. 10.00 μm or more to 0.0 wt% 9.00 〃 to less than 10.00 μm 39.4 〃 8.00 〃 to 9.00 〃 36.0 〃 7.00 〃 to 8.00 〃 0.0 〃 6 0.00 〃 to 7.00 〃 10.6 〃 5.00 〃 to 6.00 〃 7.0 〃 4.00 〃 to 5.00 〃 2.4 〃 3.00 〃 to 4.00 〃 3.0 〃 2.00 〃 to 3.00 〃 1.0 〃 1.00 〃 to 2.00 〃 0.5 〃 0.09 〃 to 1.00 〃 0.1 〃

Example 2 Gelatin powder pulverized by the above-mentioned turbo mill and classified by the particle size of 100 μm was put into a jet mill to obtain 6 kg / c.
Milling air of m ² was cooled to −15 ° C. and sprayed into a jet mill to mill gelatin powder. Grinding with this jet mill was continued for 70 minutes while classifying with a classifying rotor of 7,000 rpm, most of which was 6 μm.
It was considered to be a finer range of gelatin powder. 8.0 μm or more to less than 9.0 μm 21.0% by weight 7.0 〃 to 8.0 〃 18.0 〃 6.0 〃 to 7.0 〃 15.0 〃 5.0 〃 to 6.0 〃 19 0.0 〃 4.0 〃 to 5.0 〃 12.0 〃 3.0 〃 to 4.0 〃 10.0 〃 2.0 〃 to 3.0 〃 3.0 〃 1.0 〃 to 2.0 〃 1.7 〃 0.09 〃 to 1.0 〃 0.3 〃 In this example, lowering of the water content in the crushed gelatin powder can be avoided more than in the above-mentioned Example 1 and the crushed gelatin powder is The quality was not impaired by the heat generated during grinding. Therefore, the gelatin powder pulverized by the method of Example 2 has the same hydrophilicity as that of the gelatin material before the pulverization treatment, and has the property of causing swelling due to moisture absorption, appropriate sol and gelation. Had.

The gelatin powder pulverized by the above method has the following features in the pulverization process and the produced gelatin powder.

First, since the granular or powdery gelatin put into the jet mill is crushed in a state of being wrapped in the air of the jet mill, the gelatines are not fused to each other, and the balls or the crushed powder are crushed. No fusion to the machine surface. In particular, heat generated by grinding or impact of the ball is not dispersed and directly transmitted to the gelatin by the air of the jet mill, and there is no risk of deterioration of the gelatin or fusion of the gelatin due to the heat. In addition, when the gelatin is pulverized while being covered with low-temperature jet air, in the pulverization process of the gelatin, the gelatin becomes wet and swells or becomes sol-like, or water evaporates and heats in the pulverization process. No accompanying gelling phenomenon occurs. Therefore, the gelatin milled by this jet mill does not impair the swelling function specific to gelatin or the characteristics such as hydrophilicity and specific viscoelasticity. Also, it is possible to reliably and easily produce a fine gelatin powder having a uniform particle size without making it difficult to pulverize due to the dampness of gelatin and the increase in viscosity with heating during the pulverization process of gelatin. Can be.

Further, the gelatin powder obtained by crushing and classifying has a particle size smaller than 6 μm in the case of the above-mentioned crushing method, and is fused or entangled with each other. When the pulverized gelatin powder is mixed in a solvent, it is uniformly dispersed in the solvent, and the gelatin powder is generally dispersed like a suspension.

The gelatin thus pulverized using a jet mill is mixed and mixed with a solvent.

Each of the gelatin powders mixed and mixed in these solvents floats in the solvent in an independent state and is shielded from the outside air. This facilitates the management of the pulverized gelatin powder, and the pulverized gelatin powder does not become wet, harden, or fuse with each other.

The gelatin powder thus crushed was
It is added to a coating material together with the mixed and mixed solution of gelatin powder. The method of mixing and the amount of the mixing are appropriately determined according to the characteristics of the paint and the like.

The solvent used in the above is a typical example of an organic solvent, and a solvent suitable for a paint containing the crushed gelatin is used. This solvent requires that gelatin is insoluble, and typically dimethylformamide, toluene, methyl ethyl ketone, etc. are used, as well as methanol, isopropyl alcohol, n-butanol, benzyl alcohol, ethyl acetate, butyl acetate, acetone. , Methyl isobutyl ketone,
Cyclohexane, tetrahydrofuran, dioxane, xylol, 2-nitropropane, ethane dichloride, trichlorethylene, perchlorethylene, methyl cellosolve, ethyl cellosolve and the like are used.

Since such a solvent is insoluble in gelatin, even if gelatin is mixed into the solvent, the gelatin does not swell or start to dissolve, and water in gelatin is absorbed by the solvent. The gelatin does not harden. In addition, during storage of gelatin, it has a feature that gelatin put in this solvent is stored in the same state as when it is mixed in this solvent.

The solvent-containing paint containing the gelatin powder is a paint suitable for forming a paint film to be produced. That is, the above-mentioned gelatin powder is pulverized using a solvent suitable for the paint of the paint film to be formed.

Such a coating composition is prepared by, for example, adding and blending a solvent containing the above-mentioned gelatin powder as a part of a film-forming auxiliary element or as an improving or extending element to a film-forming element and pigment suitable for various uses. It is produced by

The paint film thus produced is
The thickness of the coating film is 0.02 because the particle size of the gelatin powder contained in the material belongs to the finer range than 6 μm.
Even in the range of up to 0.002 mm, the mixed gelatin powder did not stand up or stick out from the surface of the coating film, and the coating film was smooth and had a good feel to the touch.

Further, by eluting part of the gelatin powder contained in the coating film produced as described above, a large number of pores finer than several microns can be provided on the surface of this coating film. it can.

By providing the fine pores having a diameter of 2 to 3 μm on the surface of the coating film as described above, the coating film is provided with air permeability, and in particular, the air permeability provided to this coating film is 0. It has the feature that it allows water vapor with a particle size of around 0004 μm to pass through and does not allow water droplets to pass through. For this reason, water resistance and moisture permeability can be imparted to the coating film.

Therefore, 0.02-0.00 containing the above-mentioned gelatin powder on the surface of various fabrics, leathers, wood products, etc.
When a coating film having a thickness of 2 mm is formed and the gelatin powder therein is eluted, the water resistance and moisture permeability peculiar to these cloths, leathers, wood products, etc. are brought about.
Incidentally, the diameter of a normal raindrop is 2000 μm, and even a fine raindrop has a diameter of 100 μm, and does not pass through the fine holes provided in the coating film. Also, raindrops attached to the surface of the coating film will not permeate through the fine pores because of the surface tension.

Example 3 A polyurethane resin paint was prepared by using a solvent containing the gelatin powder, the paint was applied to form a film-like coating film, and the coating film was transferred onto the surface of the woven or knitted fabric. Gelatin powder finer than 6 μm 10 parts by weight Toluene 70 parts by weight Polyurethane resin solid content 30 parts by weight This resin solution was applied on the surface of a release paper by a doctor knife coating method to a thickness of 0.008 mm and dried. After that, it was peeled off from the release paper to form a film-shaped coating film having a thickness of 0.008 mm. Further, the release paper was peeled off while adhering to the surface of the non-woven fabric having a thickness of 1.5 mm without peeling off the film-like coating film, thereby forming a coating film skin layer on the non-woven fabric surface. When this non-woven fabric was dipped in warm water at 60 ° C. and washed with hot water for 15 minutes, the gelatin powder contained in the coating film disappeared by 35% by weight of the total amount. A coating film was prepared by increasing the mixing amount of the gelatin powder by 5 parts by weight from 3 parts by weight to 30 parts by weight. The gloss of the coated film surface was good, and while it had a sufficient waist strength, it had a sticky feeling upon contact. or,
The coating surface containing 35 parts by weight of gelatin powder has a contact resistance peculiar to gelatin and good feel to the touch, but when a strong force acts on the coating surface, wrinkles are generated on the coating surface.
Further, in the product obtained by laminating the above coating film, the surface of the base material may be partially exposed with the surface being distorted. Therefore, the optimal amount of the gelatin powder is 3 to 30 parts by weight. However, the blending amount of the gelatin powder can be further changed depending on the type of the molding resin of the coating film, the blending amount of the solvent used, the molding conditions and the like.

In the elution of gelatin powder by washing with hot water as described above, the higher the temperature of the hot water used, the greater the amount of gelatin powder contained can be eluted in a shorter time, but the coating film or laminate film is damaged. However, there is a problem that the base material is damaged. From this, comprehensively determine the type of fabric to be laminated with the coating film, the material properties and the material properties of the coating film itself, the amount of gelatin powder contained in the film, the amount of gelatin powder eluted from the coating film, etc. Taking into consideration, the gelatin powder contained in the coating film is eluted. In the polyurethane resin coating film of the above example, it is ideal to elute the contained gelatin powder with warm water or hot water of 60 to 150 ° C, and the elution amount of the contained gelatin powder is small with warm water of 60 ° C or less. , Time was needed too.

Example 4 Toluene 70 parts by weight Gelatin powder finer than 6 μm 10 parts by weight Polyvinyl chloride resin 30 parts by weight The PVC coating film produced in this Example 4 is flexible and is more flexible than a conventional PVC coating film. The stretchability was significantly increased and the moisture absorption function was brought about. In addition, a paint was produced with the above blending amount.

Example 5 Toluene 70 parts by weight Gelatin powder finer than 6 μm 10 parts by weight Acrylic resin 30 parts by weight When a coating film was formed as a paint at the compounding ratio of this Example 5, it was excellent in abrasion resistance and had a moisture absorbing function. It was a coating film.

Example 6 Toluene 70 parts by weight Gelatin powder finer than 6 μm 10 parts by weight Polyvinyl chloride resin 15 parts by weight Acrylic resin 15 parts by weight Coating formed using a coating solution containing a resin solution having the compounding ratio of Example 6 The film has good hygroscopicity and contact resistance, and has an appropriate feeling of touch.

Example 7 Toluene mixed with pulverized gelatin powder was blended with toluene. Toluene having the pulverized gelatin powder was blended with polyester of a two-component reaction type urethane paint, and then isocyanate was added and blended with a spray gun to obtain a film thickness of 0.2 A coating film of 006 mm was obtained. This coating film was excellent in matting effect, and the texture when touched by hand was good without stickiness. In this example, the gelatin powder was added in an amount of 10 to 4 with respect to the total weight of the polyester and gelatin powder in the two-component reaction type urethane paint.
A coating film was formed in the range of 0% by weight.

Example 8 A liquid urethane resin solution (yellowing-free one-component polyurethane, non-volatile content 30%) was mixed with a mixture of methyl ethyl ketone and
The mixture was adjusted to 0 to 50 poise (25 ° C.), 100 parts by weight of this urethane resin was mixed with 50 parts by weight of gelatin powder together with toluene, and the mixture was stirred and mixed so as to be 100 poise (25 ° C.). This mixture was sprayed on a PVC plate with a spray gun and dried at 100 ° C. for 1 minute to obtain a coating film having good hygroscopicity and a high matting effect.

Example 9 A film having a thickness of 0.006 mm obtained by coating a release liquid with a mixed solution obtained by mixing a solvent containing 30 parts by weight of gelatin powder in 100 parts by weight of a urethane resin and drying it. The film-like coating was transferred to a textile substrate and laminated. The surface of the woven fabric created in this way has no sticky feeling,
The feel was also excellent.

Example 10 A one-pack type urethane resin containing gelatin powder (mixed solution of nonvolatile content of 30% by weight containing gelatin powder-containing methyl ethyl ketone as a solvent) was coated on release paper with comma roll, and dried.
Further, on this coating layer, a two-pack type urethane resin containing gelatin powder (a mixed solution of 50% by weight of non-volatile content using methyl ethyl ketone containing gelatin powder as a solvent) is applied.
After drying, a laminated coating film was formed, and the laminated coating film was peeled off from the release paper and laminated and bonded to the surface of the nonwoven fabric.
The surface of the laminated non-woven fabric having a film-like coating film had no sticky feeling, and the adhesive strength was the same as that of the laminate adhesion containing no gelatin powder.

[0057]

In the present invention, the gelatin powder is pulverized in the state of being separated by the air of the jet mill, so that the gelatin powders do not directly touch each other and are fused to each other.

Further, when crushing the gelatin powder, no heat is generated due to impact crushing, and there is no inconvenience of fusion between gelatin powders or quality deterioration due to heat change.

Further, since the gelatin powder is crushed while being wrapped in the air of the jet mill, the gelatin powder is not extremely dried or swelled during the crushing process. From this, there is little inhibition of hydrophilicity due to drying of the gelatin powder, and there is little inconvenience that the gelatin powder becomes viscous with swelling and the pulverization is inhibited. From these facts, it was possible to reliably and efficiently produce a gelatin powder having a particle size in a range smaller than 6 μm.

Furthermore, since the finely pulverized gelatin is dispersed in a solvent in a suspension state, the blending with the paint is facilitated and facilitated, and the gelatin powder is uniformly dispersed in the paint. It has the following features.

Therefore, when a coating film is formed by using a coating material containing gelatin powder belonging to a finer range than 6 μm, the coating film is formed with the gelatin powder uniformly dispersed in the coating film. Is formed. From this fact, this coating film has the characteristic of absorbing and releasing moisture peculiar to gelatin, an appropriate contact resistance, and the stretchability, and at the same time, has a feature of preventing electrostatic charge.

Further, since the particle size of gelatin powder contained in this coating film is finer than 6 μm, it was made possible to form this coating film thinly. Especially as a coating film 0.0
A film having a thickness of 02 mm was formed, and the gelatin powder mixed therein did not stand up or stick out from the surface of the formed coating film, and the surface was good in touch and smooth.

Further, since the gelatin powder is uniformly exposed on the surface of the formed coating film, hygroscopicity is effectively provided on the surface of the coating film, and good touch feeling is provided.

Furthermore, when the mixed gelatin powder is eluted from the surface of the coating film to be formed, the surface of the coating film will be provided with innumerable microscopic holes of several microns. It has a characteristic that it has a moisture absorption and desorption function peculiar to, especially a water and moisture permeation function.

When the surface of the coating film formed above is subjected to sanding treatment, the gelatin powder contained in the coating film further promotes a moisture absorption function, a water vapor permeation resistance function, and a good feeling of touch. To be done.

The coating material using gelatin powder according to the present invention is used as a synthetic leather material for various furnitures, personal belongings such as bags, interior materials for automobiles, etc., because of its characteristic content in the above, and it has no static electricity. It is used for various electronic devices and keyboards for these operators.

Further, the coating material containing the above gelatin powder can be produced or used by the same method or method as the method for forming a coating film which does not contain gelatin powder. From this, the coating film using the crushed gelatin powder according to the present invention can be used as a means such as surface makeup for all commodities in daily life.

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Claims (1)

[Claims] 1. Gelatin in the form of powder or granules is crushed by a jet mill and classified to obtain gelatin powder having a particle size smaller than 6 microns, and the gelatin powder is a solvent such as dimethylformamide and toluene. A paint characterized by being mixed and blended with and being a part of a paint component.