JPH1017799A - Coating agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating agent improved in two or more properties simultaneously, esp. capable of favorably bringing out the characteristics of the solid fine particles through the interaction between them and the wax, by incorporating a coating composition with wax and solid fine particles. SOLUTION: This coating agent is obtained by incorporating (A) a coating composition such as paint, varnish, lacquer, putty or manicure with (B) at least one kind of wax (e.g. shellac wax, rice wax, vegetable wax, (modified) polyethylene, (modified) polypropylene) and (C) at least one kind of solid fine particles (e.g. polyacetal powder, polytetrafluoroethylene powder, carbon black, metallic powder). Specifically, this coating agent, improved in both coatability and coating film thickness uniformity, is produced, for example, by dispersing the components B and C in a liquid medium to form a fine particle dispersion which, in turn, is added to the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating agent used for coating various material surfaces.

[0002]

2. Description of the Related Art Conventionally, metals, woods, plastics, films, papers, and parts of the human body (eg, skin, nails), etc.
Various materials are coated. The purpose of this coating is very diverse, such as improving the abrasion resistance of the material surface, improving the lubricity, improving the scratch resistance, improving the blocking resistance, improving the gloss or matting properties, etc. In some cases, these objectives cannot be sufficiently achieved with the coating composition alone, so additives are added to the coating composition, giving the coating agent properties that cannot be obtained with the coating composition alone. There was a case.

[0003]

However, according to the prior art, when the properties of a coating agent are improved by adding an additive to a coating composition, some properties are improved, but others are not. May not be improved or may deteriorate in some cases.In such a case, it is necessary to give up on improving one of the characteristics or take measures to improve both characteristics moderately. As a result, there is a problem that a sufficiently satisfactory coating agent cannot be obtained.

[0004] The present invention has been made to solve the above problems, and an object of the present invention is to provide a coating agent capable of simultaneously improving two or more characteristics.

[0005]

In order to achieve the above-mentioned object, a coating agent of the present invention is provided as described in claim 1.
One or more kinds of waxes and one or more kinds of solid fine particles are added to the coating composition.

[0006] The coating agent according to claim 2 is
A fine particle dispersion obtained by dispersing the wax and the solid fine particles in a liquid medium is added to the coating composition.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the coating agent of the present invention, since both the wax and the solid fine particles are simultaneously added to the coating composition, it cannot be imparted only by adding only the wax or only the solid fine particles. Can be applied to the coating agent. More specifically, abrasion resistance, lubricity, scratch resistance, blocking resistance,
Gloss or matte characteristics are better than before. In addition, the dispersibility of the components in the coating agent is improved, and the stability over time of the coating agent is also improved.

[0008] The reasons why these properties are improved have not been clearly elucidated. For example, when solid fine particles are dispersed in a coating composition, the solid fine particles are solidified with the coating composition. Since the degree of freedom is lost, when the solid fine particles protruding from the surface of the coating are worn out, the desired effect of the solid fine particles is lost thereafter, whereas the wax between the coating composition and the solid fine particles is lost. When it intervenes, the degree of freedom of the solid fine particles increases, and even if the solid fine particles protruding from the coating surface are worn,
It is conceivable that the effects of the solid fine particles are maintained for a longer period of time, for example, the fine particles rotate and a new surface is exposed. In other words, by adding a wax which has been conventionally used for improving the gloss characteristics, for example, simultaneously with the solid fine particles, the characteristics improved by the solid fine particles can be further improved.

In the coating agent of the present invention,
The coating composition means a composition that has fluidity in an initial state and solidifies after being applied to the surface of a material, and includes, for example, paint, varnish, lacquer, putty, and nail polish. I do. The wax may be any of natural wax, synthetic wax, and mineral wax. Among them, natural waxes include shellac wax, rice wax, sugar wax, urushi wax, beeswax, carnauba wax, candelilla wax, white wax, lanolin, vaseline, wood wax, cane wax, spermaceti, cucumber wax, oilseed wax And wax. As the synthetic wax, polyethylene, polyethylene oxide, modified polyethylene such as chlorinated polyethylene, polypropylene, polypropylene oxide, modified polypropylene such as chlorinated polypropylene,
Examples include an ethylene acrylic acid copolymer, an ethylene vinyl acetate copolymer, and a polycarbonate. In addition, examples of the mineral wax include montan wax, microcrystalline wax, oxidized microcrystalline wax, Fischer-Tropsch wax, paraffin, and paraffin oxide.

Further, solid fine particles include polyacetal powder, polytetrafluoroethylene, vinylidene fluoride, ethylene difluoride, silica, tricalcium phosphate,
Bengala, carbon black, glass, metal powder, starch powder, cellulose powder, polyacrylonitrile, polyacrylate metal salt, polymethacrylate metal salt, polyacrylamide powder, melamine resin, phenol resin, titanium oxide, calcium carbonate, calcium hydroxide And the like.

By the way, depending on the viscosity of the coating composition, the viscosity may be excessively increased by the addition of wax or solid fine particles, so that the subsequent handling may not be easy. If the viscosity is too high, the wax and the solid fine particles are not uniformly dispersed, and the initial effect may not be obtained. In such a case, it is effective to add a fine particle dispersion obtained by dispersing wax and solid fine particles in a liquid medium to the coating composition.

Here, the liquid medium not only suppresses an increase in the viscosity of the coating composition, but also acts to disperse the wax and the solid fine particles uniformly in advance and prevent uneven distribution of the wax and the solid fine particles in the system. I do. In addition,
When the coating agent is solidified, it is preferable that the coating agent does not remain in the film as it is in a liquid state. Usually, aromatic hydrocarbons such as toluene and xylene, and volatile organic compounds such as alcohols, esters, and ketones are used. Solvents, glycols and derivatives thereof, high-boiling aromatic hydrocarbons, high-boiling aliphatic hydrocarbons and the like are selected.

With such a coating agent, a uniform mixture can be produced without excessively increasing the viscosity, the coating operation can be carried out smoothly, and the formed film has a film thickness. Has a high uniformity.

[0014]

EXAMPLES Next, in order to further clarify the embodiments of the present invention, examples of the coating agent of the present invention will be described. The embodiment described below is merely an example of an embodiment of the present invention, and the embodiment of the present invention is not limited to the specific examples described below.

Example 1 A composition comprising 16 parts by weight of polyethylene wax and 84 parts by weight of toluene was prepared. 1 [Selva # 61, manufactured by Kansai Paint Co., Ltd., NV
[30.0 + 1.0%] to 100 parts by weight, and thoroughly stirred and mixed to obtain Sample 1.

Also, 7.5 parts by weight of polyethylene wax, 7.5 parts by weight of fine powder of polytetrafluoroethylene,
And 85 parts by weight of toluene were prepared, and 20 parts by weight of this composition were mixed with the above-mentioned nitrified cotton clear lacquer 1
The mixture was added to 100 parts by weight and mixed well with stirring to obtain Sample 2.

Further, Sample 3 was prepared by adding nothing to the above nitrified cotton clear lacquer. Each of the above samples was coated on black glossy paper with a doctor blade (2 mil) and subjected to an abrasion resistance test and a lubricity test after drying. The abrasion resistance test was performed by Gakushin type friction fastness tester [Showa Juki Co., Ltd.]
After rubbing 1,000 times with a load of 500 g, the degree of surface was visually evaluated. For the slip test, the slip angle was measured under a load of 1 kg using a slip angle tester (manufactured by Toyo Seiki Co., Ltd.). Table 1 shows the measurement results.

[0018]

[Table 1]

Example 2 8 parts by weight of carnauba wax
And a composition consisting of 92 parts by weight of ethylene glycol monobutyl ether [trade name: butyl cellosolve], and 20 parts by weight of this composition were mixed with nitrified cotton clear lacquer No. 1 [Selva # 61, manufactured by Kansai Paint Co., Ltd., N
V30.0 + 1.0%] to 100 parts by weight,
Sample 4 was obtained by thorough stirring and mixing.

A composition comprising 5 parts by weight of carnauba wax, 5 parts by weight of polytetrafluoroethylene fine powder, and 90 parts by weight of ethylene glycol monobutyl ether was prepared, and 20 parts by weight of the composition was added to the above-mentioned nitrified cotton clear lacquer. Sample 5 was obtained by adding to 100 parts by weight and stirring and mixing well.

Further, Sample 6 was prepared by adding nothing to the above-mentioned nitrified cotton clear lacquer. Each of the samples was coated on black glossy paper with a doctor blade (2 mil) and subjected to a lubricity test and a glossiness test after drying. The lubricity test was evaluated by the method described in Example 1 above. Gloss is measured with a gloss meter [GM Murakami Color Research Laboratory, GM
−26, 60 ° specular reflection]. Table 2 shows the measurement results.

[0022]

[Table 2]

Example 3 A composition comprising 10 parts by weight of polyethylene wax and 90 parts by weight of toluene was prepared, and 20 parts by weight of this composition was treated with clear lacquer No. 1 [Selva # 61, manufactured by Kansai Paint Co., Ltd., NV
[30.0 + 1.0%] to 100 parts by weight, and mixed well with stirring to obtain Sample 7.

9.5 parts by weight of polyethylene wax, 4.8 parts by weight of fine silica powder, and 85.5 parts by weight of toluene.
A composition consisting of 7 parts by weight was prepared, and 20 parts by weight of this composition was added to 100 parts by weight of the above-mentioned nitrified cotton clear lacquer, and the mixture was thoroughly stirred and mixed to obtain Sample 8.

Further, Sample 9 was prepared by adding nothing to the above nitrified cotton clear lacquer. Each of the above samples was coated on a black Pitro glass with a doctor blade (4 mil), and dried and subjected to a gloss test. The gloss test is
Evaluation was performed by the method described in Example 2 above. Table 3 shows the measurement results.

[0026]

[Table 3]

[0027]

As described above, according to the coating agent of the present invention, one or more kinds of wax and one or more kinds of solid fine particles are added to the coating composition. Can be simultaneously improved, and in particular, the interaction between the wax and the solid fine particles can more suitably bring out the characteristics of the solid fine particles.

In particular, according to the coating agent of the second aspect, the wax and the solid fine particles are uniformly dispersed, the excessive increase in the viscosity is suppressed, the coating is easy, and the uniformity of the film thickness is good. It will be.

Claims (2)

[Claims] 1. One or more waxes, 1
A coating agent characterized in that one or more kinds of solid fine particles are added to a coating composition. 2. The coating agent according to claim 1, wherein a fine particle dispersion obtained by dispersing the wax and the solid fine particles in a liquid medium is added to the coating composition.