JPS60183127A - Heat-fusing painting - Google Patents

Abstract

PURPOSE:To prevent a toxicity and an air pollution caused from diffusion of solvents by applying and fixing, with heat and pressure, a resin layer surface of a resin film which is coated upon either one side or both sides of a substrate strip over a surface of an object to be painted. CONSTITUTION:A coated resin film which has been obtained by application of resin on either one or both sides of a substrate strip is used, and by applying and fixing, with heat and pressure, the surface of resin layer of the coated resin film over the surface of an object to be painted a painting film layer which contains a coated resin is formed. As for coating resin to be used on a substrate strip, urea resin, polyethylene resin, polystyrene resin etc. are quoted. Heat and pressure adhesion between the coated resin film and the object to the painted can be easily performed by using various types of heat press, heat press rolls and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a thermal fusion coating method. More specifically, the resin layer side of a coating resin film obtained by applying a resin to a film-like support is applied to the surface of the object to be coated, and the coating resin is fused onto the surface to be coated by thermocompression bonding. The present invention relates to a coating method for forming a coating layer including a body.

[Prior art of the invention and its problems] Conventionally used methods of covering surfaces for the purpose of surface protection, aesthetics, marking, etc. include liquid coating methods such as brush m'')
, air spray, airless spray, roll coater
, flow coater, static coating, electrodeposition coating, etc., and in powder type coating, there are methods such as fluid immersion by heating the object to be coated, melt coating after electrostatic coating, etc.1, but these coatings Many problems remain with the method. For example, when using solvent-based paints, there are concerns about negative effects on the human body and air pollution due to the organic solvents contained in the paints, the drying and curing process takes a long time, and the paint film is also affected by the volatilization of the solvent. As a result, shrinkage and thinning of the coating material occur, which causes problems such as the need for several recoating steps for objects with porous surfaces, resulting in extremely poor productivity.

On the other hand, when using solvent-free paints, a high viscosity coating machine such as an airless sprayer, flow coater, or p-lu coater is required compared to solvent-based paints, and fluid-dip coating machines are required for powder-type paints. This method requires large equipment and high energy, making it difficult to coat materials that easily deform when heated, such as wood and plastic.

In recent years, electron beams, γ
Radiation-curable coatings, such as UV rays, and photocurable coatings, have been developed, but they require a huge amount of equipment investment and large-sized equipment, and there are problems in general ease of use. In addition to the above-mentioned painting method, K.

A method of gluing thermosetting resin plates is also used1, but the original feel and texture of the coating material itself cannot be expressed.
It is not as good as the one that has been painted in a row.

As described above, there are various problems inherent in the currently used painting methods and surface protection and aesthetic expression methods of adhering a cured resin plate to the surface of the object to be coated.

[Problem that the invention seeks to solve]

The present invention solves the above-mentioned problems of the conventional painting method, eliminates the toxicity and air pollution problems caused by solvents and volatilization, and greatly reduces the time required for the painting process without requiring special painting equipment. It is an object of the present invention to provide a coating method capable of forming a coating layer that is short, strong, and has a good finish.

[Summary of the invention]

The inventors of the present invention have conducted intensive studies while keeping the above-mentioned problems in mind, and as a result, the present inventors have discovered that a coated resin film obtained by coating a resin on one or both sides of a film-like support in advance is used. Heat-fusion coating in which the resin layer side of the coating resin film is applied to the surface of the object to be coated and subjected to thermal compression bonding to fuse the coating resin onto the surface to be coated to form a coating layer containing a film-like support. By employing this method, the inventors discovered that the intended purpose of the present invention could be achieved and completed the present invention.

The present invention will be explained in detail below.

In the present invention, the resin applied to the film support is a resin composition containing resins commonly used for coatings, curing agents, accelerators, solvents, pigments, dyes, stabilizers, sensitizers, various fillers, etc. These resin compositions are coated uniformly on a predetermined film-like support using a conventional coating method such as a bar coater, knife coater, roll coater, flow coater, immersion isostatic pressure, etc. A coating resin film is prepared by drying and removing the volatile components contained therein, or by semi-curing or completely curing as required.

The above resin coating on the film-like support usually requires coating once or twice if the film thickness is 100 μm or less, but if a thick coating layer is required, coating and drying may be repeated several times or After coating, the resin layer is semi-cured or completely cured by heating, etc., and then coated again by the above-mentioned coating method to create a heat-sealing coating resin film consisting of a composite resin layer having a predetermined thickness. .

The coating resin film produced by the above method is thermocompressed by applying the resin layer surface of the coating resin film to the surface of the object to be coated. , can be easily carried out using a hot press roll, etc., and the thermocompression bonding conditions vary depending on the coating resin film used, the object to be coated, etc., but usually the compression pressure is 1 to 30 KP/I! ! , Pressure bonding temperature/time 60-b By press-bonding, the coating resin is fused to the surface to be coated to form a coating layer including a film-like support.

The film-like support used in the present invention is not particularly limited to paper, processed paper such as release paper, chemical fiber, thermoplastic resin film, etc., as long as it can be uniformly coated with resin. %S.

It is preferable that the film-like support be as thin as possible in consideration of manufacturing scheme, handling efficiency, and thermal conductivity.

Further, the film-like support remains in the coating layer after heat-fusion coating and becomes a part of the coating layer, thereby making the coating layer tougher. In addition, if a transparent coating layer is required depending on the purpose of painting, the voids in the film support such as paper or fibers should be completely filled with resin, and the refractive index of the resin and film support should be The closest one is selected and used.

Depending on the application, colored, patterned, or embossed film supports may be used to color the surface to be painted.
It can also be applied to patterning, different painting, etc.

In the present invention, the resin to be applied to the film-like support mentioned above may be a common resin for coating, such as a phenol resin,
Urea resin, epoxy resin, alkyd resin, melamine resin, polyurethane resin, unsaturated polyester resin, butyral resin, poval resin, acrylic resin, chlorinated rubber resin, vinyl chloride resin, vinyl acetate resin, polyethylene resin, polypropylene resin, polybutadiene Examples include thermosetting or thermoplastic resins such as polystyrene resins, vinyl chloride-vinyl acetate copolymer resins, acrylic copolymer resins, polyptadiene/copolymer resins, nitrified cotton resins, petroleum resins, and ketone resins. It will be done.

These coating resins may be used alone or in a mixture of two or more.

In addition, when using a thermosetting resin, curing agents used in combination include diacyl peroxide, dialkyl peroxide, "peroxy ester, hydroperoxide, ketone peroxide," as a radical polymerization initiator.
Organic peroxides such as peroxyketal and their promoters include amine compounds such as dimethylaniline, carboxylic acid metal salts such as cobalt naphthenate,
In addition, as an epoxy resin curing agent, amines such as diethylene triamine, carboxylic acid anhydrides such as phthalic anhydride, BF, type compounds, 18H group, -NCO group, -
Known compounds such as 2-ethylimidazole, benzyldimethylamine, tetraethylammonium bromide, choline chloride, and caustic potash are used as compounds having one or more of C0NH groups and promoters thereof.

Furthermore, it is also possible to blend vinyl mono-1-s such as trimethylol tetrapane trimethacrylate, ethylene glycol dimethacrylate, divinylbenzene, and triallyl isocyanurate, phenol resin, urea resin, melamine resin, etc., if necessary. .

Antioxidants, ultraviolet absorbers, etc. as stabilizers may be added to the coating resin used in the present invention, and examples of antioxidants include hydroquinone, aromatic amines, aldehyde amine condensates, phenyl-β-naphthylamine; Examples of ultraviolet absorbers include nistyl salicylate type, hydroxypenzophenone type, benzotriazole type, etc. Addition of these stabilizers tvt, general KO,
01 to 5% by weight.

In addition, coating film colorants used as paint additives include organic pigments, carbon black, inorganic pigments, dyes, metal powders, etc., and if necessary, anti-lifting agents, color separation prevention agents, lecithin, etc. Naphthenic acid metal salts, fatty acids, surfactants, etc. are used as sub-additives.

In addition to the above paint additives, gas checking agents during thermocompression bonding, oxidation dryers, etc. may also be used.

As mentioned above, the objects to be coated used in the present invention include metals,
It is used for surface coating of plastics, inorganic materials, wood, etc., and for coated objects with low coating film adhesion such as plastics and inorganic materials, the heat fusion method of the present invention is used to apply a primer coating that gives adhesion in advance. A coating film with high adhesion to the object to be coated can be obtained by applying heat fusion coating after coating or a general coating method. Further, if a higher quality coating surface finish is required, the surface of the coating layer formed by heat-fusion coating according to the present invention should be polished.

〔Effect of the invention〕

The thermal fusion coating method of the present invention can form a coating layer that is free from pollution caused by organic solvents.

[Embodiments of the invention]

The details of the present invention will be specifically explained by examples, but the present invention is not limited to these examples in any way unless the gist thereof is exceeded. Note that parts and % in sample preparation and examples indicate parts by weight and % by weight.

(A) Sample preparation Sample 1 A four-sided round bottom flask equipped with a stirrer, dropping funnel, temperature needle, reflux condenser, and dry air blowing tube had an average molecular weight of 1,
000, Ptadi≦-position of the polymer chain・092% is 1.2-
A urethane-modified derivative containing 3.6% free incyanate made from polybutadiene diol consisting of bonds (
Add 700 parts of Nl5SO-PBTL-1,000 (manufactured by Nippon Soda Co., Ltd., 50% ethyl acetate product), raise the temperature of the liquid to 80°C, and then add 700 parts of it from the dropping funnel while passing a small amount of dry air.
71 parts of hydroxyl engineered acrylate was added dropwise over 2 hours, and after the addition was completed, the reaction was continued for 3 hours at 80°C.

Next, after the reaction solution was cooled to room temperature, 71 parts of a mixed solution of ethyl acetate/toluene 1/1 was added to prepare a coating resin sample ('/% 1) with a resin concentration of 50%.

In addition, a coating resin sample [/l6l-A] was prepared by blending 1 part of an organic peroxide (Perhexa 3M manufactured by NOF ■) with 100 parts of the above coating resin sample (41).

Furthermore, for 100 parts of the coating resin sample (161), an organic peroxide (Barbutyl Z manufactured by NOF Iff#) was added.
1 part, cobalt naphthenate (as pure cobalt/L-to)
Coating resin sample [/161-
B) Adjusted.

Sample 2 An average molecular weight of 1.000 was placed in a round bottom flask similar to Example 1.
, an epoxy-modified derivative made from polybutadiene dicarboxylic acid in which 92% of the butadiene units in the polymer chain are 1,2-bonds (manufactured by Nippon Soda Co., Ltd., Nl5SO-PB-: r-
H #shi EPB-52M, x-hoxy equivalent weight 2750) 4
To 00 parts, add 4 parts of dicyandiamide o,
The mixture was stirred and dissolved to prepare a coating resin sample [A2].

Sample 3: With an average molecular weight of 1,000, 192% of the polymer chains are 1.2-
Made from polybutadiene diglycol consisting of bonds,
A polymeric resin obtained by partial oxidation by introducing air and heat treatment in the presence of a solvent, an oxidizing agent, and a catalyst.
Nippon Soda Co., Ltd. Nl5SO-PB -GQ -1,000
, solid content 45%) to 25 parts of styrenated alkyd resin (Styresol 4250 manufactured by Inu Nippon Ink Chemical Industry Co., Ltd.).
A coating resin sample (A3) was prepared by adding 75 parts (solid content: 45%) and stirring well to mix and dissolve uniformly.

Sample 4 Nippon Soda Co., Ltd. Nl5SO-PB-αto1 used in Sample 3
．． 00080 parts, butylated melamine resin (Super Beckamine J-820 manufactured by Dainippon Ink Engineering Co., Ltd.)
, solid content 60%) 20 parts, 6% manganese naphthenate 03
A coating resin sample (A64) was prepared by adding a portion of the mixture and stirring well to mix and dissolve uniformly.

Sample 5 Nl5SO-PH-GQ -1,000 used in sample 3
Add 15 parts of carbon black to 30 parts and knead well with a paint roller to create a black enamel mill base.
0 parts and 20 parts of Super Beckamine J-820 were added and stirred well to mix and dissolve uniformly to prepare a black coating resin sample (AIL5).

Example 1 Coating resin sample obtained in the preparation of sample 1 (A 1
- A) Thin paper (Hakushu Paper ■ base paper for foil 20 g/
m”, as μm), and treated so that the resin adjustment liquid penetrates into the inside of the paper fibers, and then pulled out at a speed of 1 roll while squeezing the excess resin liquid with two squeeze rolls with a gap of 1 roll. , evaporate and dry the solvent (45℃, N20 minutes)
Coating resin film CP- with a thickness of 200 μm
1) was obtained.

(The film thickness can be adjusted by repeating dipping, repeating coating, or combining dipping and coating as necessary.)Next, the object to be coated is a lauan plywood board (150 x 50 x 3 sm +)
Lay the resin layer side of the above coating resin film on the surface to be coated, place a K 50 μm polyester film (to prevent the resin from adhering to the heat press plate) on top of it, and press it using a heat press machine under the conditions shown in Table IK. 1 Heat fusion coating was applied.

After the coated object obtained by the above coating was left at room temperature for 24 hours, the coating film performance was measured as a test piece. The results are shown in Table IK.

Example 2 A thin paper similar to that in Example 1 was immersed in the coating resin sample [Rot 1-B] obtained in Sample 1, and a coating resin film was created by performing the same treatment as in Example 1.
The curing reaction was accelerated in a hot air dryer at 70°C for 20 minutes. Next, the coating resin sample obtained in sample 1 [/I61]
The resin was immersed in the liquid and pulled up at a speed of 1 l while squeezing the excess resin liquid with a squeeze roll with a clearance of 1% 1.5 wa, and the solvent was evaporated and dried (45°C x 20 minutes) to a thickness of 300 mm.
A μm coating resin film (P-2) was obtained.

Next, using the above coating resin film, Example 1
Heat fusion coating was carried out in exactly the same manner as above, and the coating performance was measured. The results are shown in Table IK.

Example 3 Galanucross base material (EPC030 manufactured by Arisawa Seisakusho) was immersed in the coating resin sample [Rot 2] obtained in Sample 2, and treated so that the resin conditioning liquid penetrated into the inside of the glass fiber. , following the same operations and procedures as in Example 1, at 25°C.
After drying for 24 hours, a coating resin film (P-3) having a thickness of 300 μm was obtained.

Next, the above coating resin film, steel plate (polished steel plate J
IS-3141, 150X 50X O, 3m)
Heat fusion coating was carried out under the conditions shown in Table IK in the same manner as in Example 1, except that the coating film performance was measured, and the results are shown in Table 1.

Example 4 A polyester fiber nonwoven fabric (Nippon Vilene H8103, thickness 70 μm) was immersed in the coating resin sample [Rotation 3] obtained in Sample 3, and the following operations were carried out in exactly the same manner as in Example 1.
A coated resin film CP-4) having a film thickness of 300 μm was obtained according to the procedure.

Next, using the above coating resin film, Example 1
Heat fusion coating was performed in exactly the same manner, and the coating performance was measured. The results are shown in Table 1.

Example 5 The coating resin sample [Fu 4] obtained in Sample 4 was applied onto a silicone-coated polyester release film (Fujimori Kogyo 1 Biner Sheet 38E-C0IODW) after drying at 120'C/20 minutes. , to obtain a film with a thickness of 150 μm.Next, a coating resin sample [/161] was applied on one side of this film, and the solvent was evaporated and dried (45°C x 20 minutes) to give a total film thickness of 2
A coating resin film (Ps) of 00 μm was obtained.

Next, the resin layer surface of the coating resin sample (41) of the coating resin film was placed on the coated surface of an asbestos slate board (150×50×3 size). Thermal adhesive coating was then carried out under the conditions shown in Table IK in the same manner as in Example 1, and the coating film performance was measured, and the results are shown in Table 1.

Example 6 Black coated enamel resin sample obtained in sample 5 (
Overlay base paper (Daifuku Paper Co., Ltd. Overlay base paper A for decorative boards) was immersed in I65), and the same operations and procedures as in Example 1 were followed to obtain a black coated resin film (P-6) with a thickness of 300 μm.

Next, Example 1 was prepared using the above coating resin film.
Heat fusion coating was carried out in exactly the same manner as above, and the coating film performance was measured, and the results are shown in Table IK.

Procedural amendment document March 1985 JaL Commissioner of the Japan Patent Office Manabu Shiga 1, Indication of the case Patent Application No. 38623 of 1988 2, Name of the invention Thermal fusion coating method 3, Person making the amendment Relationship with the case Patent application Person 8100 2-2-1 Otemachi, Chiyoda-ku, Tokyo (430
) Nippon Soda Co., Ltd. Representative Nippon Sannomiya 4, Agent 8100 2-2-1 Otemachi, Chiyoda-ku, Tokyo Nippon Soda Co., Ltd. Phone (245) 6234 -0 1i1+ (71,25) Yoshimi Yokoyama 1- Details Column 6 of Detailed Description of the Invention, Detailed Description of the Invention in the Description of Contents of the Amendment is amended as follows.

("Coating material" on page 3, line 8 of the 11 specification is corrected to "object to be coated."

(2) "Painting method" on page 3, line 11 is corrected to "painting method."

(3) Correct "in advance" in the 4th line of page 4 to "in advance."

(4) On page 6, line 11, ``Simplified'' is corrected to ``Price.''

(5) "Nistil" in the 6th line of page 9 is corrected to "ester".

(Insert ``for resins'' after ``generally'' in the 9th line of page 9 of 61.

(7) Change “2-hydroxy” on page 11, line 12 of the same page to “
2-Hydroxy”.

(8) On page 16, line 11 of the same page, "bolyesul" is corrected to "polyester."

(9) “Table 1” at the top of the table on page 19 of the same page is “Table = 1”
Correct.

Claims (1)

[Claims] (1) Using a coating resin film obtained by applying a resin to one or both sides of a film-like support, the resin layer side of the coating resin film is applied to the surface of the object to be coated and bonded under heat, thereby applying the coating resin. A thermal fusion coating method characterized by fusion-bonding on a surface to be coated to form a coating layer containing a film-like support.