JP2692701B2 - FRP non-combustible product and non-combustible treatment method for FRP base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonflammable coating process for FRP substrates.

[Prior art]

[0002] The coating method of the FRP base material is an existing FRP method as a method for refreshing FRP products such as toilets and washrooms in order to improve the usability of the FRP products.
It is an inexpensive and short-term method that can be used without removing the base material. In particular, the non-flammable coating method of the FRP base material can be effectively applied to materials for railway vehicles and the like, which are required to have non-flammability, and the necessity thereof is high. However, FRP substrates and coatings are generally flammable. Further, the FRP base material has a strong tendency to accumulate heat even if it is non-combustible when subjected to a normal non-combustible treatment, and the surface temperature of the base material is 600 even when the temperature of the irradiation heat of the surface is about 550 ° C.
The surface temperature does not immediately drop even after the irradiation is completed. For this reason, the coating film applied to this base material causes "blisters" and the like due to heating, and since the irradiation flame burns and burns onto this blister portion, it does not have sufficient incombustibility, and for example, as a material for railway vehicles. Does not meet nonflammability requirements.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention
Construction method to give non-combustibility to the base material, especially FR currently used
The object is to develop and provide a non-flammable coating method utilizing P base material, and as a result of research, it is possible to provide a material satisfying the requirements of non-flammability by mixing metal powder or the like into a commercially available epoxy resin. I found it. However, the finished surface is not glossy and has a defect of poor adhesion to the surface of the FRP substrate. Therefore, after further research, the present invention is
Provide an FRP non-combustible product having excellent adhesion between the paint layer and the FRP base material and having a glossy finished surface, and an inexpensive and easy flame-retardant coating method applicable to existing FRP products. The purpose is to

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a non-combustible base coat made of the same kind of resin as the undercoat paint layer and the undercoat paint layer containing the metal powder formed on the undercoat paint layer on the surface of the FRP substrate. And an FRP product with layers.

The undercoat paint used in the present invention is a material which has excellent adhesion to the surface of the FRP substrate and also adhesion to an intermediate material which is excellent in non-combustibility.
Any resin such as urethane can be used. Epoxy resins are particularly preferred because they have particularly good adhesion, and modified bisphenol-based epoxy resins are even more preferred because they provide even better adhesion. As the bisphenol-based epoxy resin, a bisphenol A / epiclohydrin type diepoxide having epoxy groups at both ends of a molecular chain is typically used, and for example, a commercially available product under the trade name NEW Base Coat (manufactured by Thermo Glaze Co., Ltd.) Can be used.

The non-combustible base coat material is formed by mixing metal powder into the undercoat material. The mixed amount is 5 to 30% by weight, more preferably 10 to 20% by weight, based on the total weight of the non-combustible base coat. If it is less than 5% by weight, the non-flammability is not sufficiently imparted in the usual coating film thickness, while if it exceeds 30% by weight, it is not preferable in the operation of the gun nozzle in the spraying method of on-site construction, and the interlayer of the metal paste is not coated after coating. There is a risk of destruction. Especially,
In consideration of workability while maintaining nonflammability, the amount of the metal powder mixed is preferably 10 to 20% by weight.

As an example of the metal powder added to the undercoat material for forming the non-combustible base coat material, manganese, magnesium, zinc, aluminum, silver or the like can be used, but aluminum is preferable in view of production cost, Silver is preferred from the viewpoint of durability. The metal powder has a particle shape, a linear shape, or a flat circular shape, and has a size of 5 to 15 μm. As an example, an aluminum paste (product number: 1109M-0, grade N manufactured by Toyo Aluminum Co., Ltd.)
o. 1-110-061, particle size: coarse, type: non-leaf type) can be used.

The topcoat material is required to have excellent surface gloss while adhering to the non-combustible base coat, and urethane resin is preferable. A resin made of a modified urethane resin is more preferable from the viewpoint of providing even more adhesion and gloss. As the modified urethane resin used as the overcoat material, for example, those commercially available as Protea Top Coat (manufactured by Thermo Glaze) can be used.

[0009]

FUNCTION AND EFFECTS OF THE INVENTION A material treated with a non-combustible FRP base material has a strong tendency to store heat even if it is non-combustible, and the surface temperature of the base material is high even if the surface irradiation heat temperature is about 550 ° C. Is 600 ° C. or higher, and the surface temperature does not easily drop even after the irradiation is completed. For this reason, the coating film applied to this base material causes blisters and the like due to the amount of heat, and the irradiation flame burns and burns at the blisters, so it does not pass the incombustibility as an interior material for railway vehicles.

According to the present invention, as a non-combustible treatment for FRP products, a non-combustible base coat paint in which a metal powder is mixed in an undercoat paint can be used to impart a non-combustible property to the FRP surface. By applying an undercoat paint that does not contain metal powder between
It is possible to overcome the poor adhesion between the surface and the metal powder. Further, good gloss can be obtained by using a top coating material on the non-combustible base coat layer. In addition, it is not desirable to remove existing FRP products that require nonflammability and replace them with products made of other materials, because the construction period is long and the construction cost is high. FRP with multi-layer coating layer having base coat
Since each layer is formed by spray coating when it is formed into a product, it is possible to form a coating film as a thin film that is uniform and has sufficient non-flammability, so it is possible to perform sufficient drying even with natural drying. The FRP product can be made nonflammable without needing a drying facility.
Therefore, as a non-combustible treatment method for refreshing FRP products, it is possible to refresh FRP products whose surface has deteriorated, for example, vehicle interior parts such as vehicle interiors, toilets or toilet articles without taking them out from the installation location, It is extremely suitable for the regeneration of FRP substrates.

[0011]

EXAMPLE The construction of the non-combustible coating method according to the present invention is as follows (1)
Surface treatment (sanding of FRP products, removal of powder after sanding, removal of fat), (2) Application of undercoat material (bisphenol epoxy resin containing no metal powder), (3) Application of non-combustible base coat , (4) conditioning, and (5) application of topcoat material (see FIG. 1).

The surface treatment which is the first step of this process is FR
The main product is sanding of P product, which includes removal of powder and removal of fat after sanding. The sanding is performed with sandpaper for the purpose of lightly polishing to remove the surface protrusions and the deteriorated surface of the FRP base material, and to increase the surface area for improving the adhesion of the coating material. The sanding treatment is usually performed using a detergent, a cleaning thinner or the like for degreasing or cleaning the surface. Further, after the sanding treatment, a drying treatment is usually performed to remove surface moisture.

The second step of the above step is a step of coating the surface of the FRP product by applying an undercoat paint (bisphenol epoxy resin containing no metal powder). The bisphenol epoxy resin curing agent is combined with an aminosilane coupling agent. 7.5 to 7.5 parts by weight of curing agent resin content
It is prepared by adding and mixing in the range of 30 parts by weight, and this curing agent is mixed with an epoxy resin main component at an appropriate ratio, for example, 1 part by volume to 3 parts by weight of the main component, and the mixed solution is spray-coated to a predetermined ratio. A film thickness, for example, about 120 to 200 μ (wet state) is applied, and after application, it is dried. Dry at 20 ℃ 12
It is appropriate to do it for more than an hour. After drying, sand the surface with sandpaper to remove sanding powder.

The non-combustible base coat treatment of the third step of the above step is a step of coating the undercoat material of the second step with a bisphenol epoxy resin mixed with metal powder,
A hardener, an aminosilane coupling agent, and a main agent similar to those of the above-mentioned undercoating paint are mixed in the same proportion in the same procedure as in the case of the above-mentioned undercoating paint, and 5 to 30% of metal powder is added to the total weight of the paint. What was added by weight% is dried and sanded in the same manner as the above-mentioned step of applying the undercoat paint. The surface is made uniform by sanding, and if necessary, further conditioning is applied to improve the adhesion between the topcoat material on the surface and the non-combustible base coat with a special thinner that is a mixture of one or more of methyl ethyl ketone, acetone, xylene, toluene, etc. Good.

In the final overcoating step of the above steps, a modified urethane resin consisting of a main agent and a curing agent is usually mixed in a volume ratio of 2: 1 and this mixed solution is spray-coated to have a predetermined film thickness, for example, about 100 to 150 μm. Apply and dry. 20 ° C
It is suitable to dry for 24 hours or more. The layer thickness of the coating part by the above process is about 0.3 mm. The object of non-combustion treatment can be achieved only by the steps (2) and (3).

Test Results The following test results were obtained for the nonflammable FRP product obtained by the above process. 1) In order to check the adhesion between the coating film and the base material, a cross-cut test was conducted. With the substrate coated, a 10 mm square was cut into 1 mm squares each, and cellophane tape was applied and peeled off, and a result satisfying the pass standard of 100/100 was obtained. 2) A thermal cycle test was conducted for 10 cycles at -25 ° C for 30 minutes, 25 ° C for 5 minutes, and 85 ° C for 30 minutes, and satisfactory results were obtained. 3) The crack resistance test (fatigue test) conducted at a frequency of 10 Hz and an amplitude of 0 ⇔ 0.45% strain was 260,00 for the non-combustible base coat and the overcoated FRP substrate.
It was performed 0 times or more, and the result was satisfactory. 4) The gloss was satisfactory. 5) The incombustible treatment method for the FRP substrate obtained by the present invention passed the material combustion test for railway vehicles by Japan Railway Vehicle Machinery Technical Association.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing the steps of a coating repairing method of the present invention.

FIG. 2 is a cross-sectional view of a surface portion of an FRP base material.

FIG. 3 is a cross-sectional view of a surface portion of an FRP substrate on which the process of the present invention has been applied.

[Explanation of symbols]

1 ... Glass matte resin layer, 2 ... Gel coat layer, 3 ... Undercoat coating layer, 4 ... Incombustible base coat layer, 5 ... Topcoat coating layer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08J 7/04 C08J 7/04 Q (72) Inventor Toshio Nishitani 86, Tabeishi, Sue-machi, Kasuya-gun, Fukuoka Prefecture -170 (56) Reference JP-A-2-20572 (JP, A) JP-A-60-94349 (JP, A) JP-A-61-168584 (JP, A)

Claims (20)

(57) [Claims] 1. An FRP comprising a FRP base material, an undercoat paint layer, and a nonflammable base coat layer made of the same kind of resin as the undercoat paint layer mixed with the metal powder formed on the undercoat paint layer.
RP non-combustible product. 2. The FRP non-combustible product according to claim 1, further comprising a top coating layer applied on the non-combustible base coat layer. 3. The FRP non-combustible product according to claim 1, wherein the undercoat paint comprises an epoxy resin. 4. The FRP nonflammable product according to claim 3, wherein the undercoat paint is made of a modified bisphenol epoxy resin. 5. The FRP non-combustible product according to claim 2, wherein the top-coat paint is made of urethane resin. 6. The FRP non-combustible product according to claim 5, wherein the top coating comprises a modified urethane resin. 7. The FR according to claim 1, wherein the non-combustible base coat is made of a resin mixed with 5 to 30% by weight of metal powder with respect to the total weight of the non-combustible base coat.
P non-combustible product. 8. The F according to claim 1, wherein the incombustible base coat is made of a resin mixed with 10 to 20% by weight of metal powder with respect to the total weight of the incombustible base coat.
RP non-combustible product. 9. The FRP non-combustible product according to claim 7, wherein the metal powder is aluminum. 10. The FRP non-combustible product according to claim 7, wherein the metal powder is silver. 11. A non-combustible treatment method for an FRP substrate, which comprises the steps of forming a multi-layer coating layer having a non-combustible base coat mixed with at least a metal on the surface of the FRP substrate and forming each layer by spray coating. . 12. A step of applying an undercoat paint to the surface of an FRP substrate, and then a step of forming a nonflammable base coat made of the same resin as the undercoat paint mixed with metal powder on a layer of the undercoat paint. Nonflammable method for treating FRP base material. 13. A step of applying an undercoat paint to the surface of an FRP base material, and then a step of forming a non-combustible base coat made of the same resin as the undercoat paint mixed with metal powder on a layer of the undercoat paint. Further, a method of non-combustible treatment of an FRP base material, which comprises a step of applying an overcoat paint on the non-combustible base coat layer. 14. The method of treating incombustibility of an FRP substrate according to claim 12, wherein the undercoat paint is made of an epoxy resin. 15. The method for incombustible treatment of an FRP base material according to claim 14, wherein the undercoat paint comprises a modified bisphenol epoxy resin. 16. The method of treating incombustibility of an FRP substrate according to claim 13, wherein the top coating material is made of urethane resin. 17. The method of treating incombustibility of an FRP substrate according to claim 16, wherein the topcoat paint is a modified urethane resin. 18. The non-combustible base coat contains 5 to 5 metal powders.
18. The method for non-combustible treatment of a FRP substrate according to claim 12, which comprises an epoxy resin mixed with 30% by weight. 19. The non-combustible base coat comprises 10 metal powders.
13. An epoxy resin mixed with ˜20% by weight.
18. A method for non-combustible treatment of a FRP substrate according to any one of 1 to 17. 20. A step of applying sanding to the surface of the FRP base material, a step of applying an undercoat paint, and a step of subsequently forming a non-combustible base coat made of a resin mixed with metal powder on the layer of the undercoat paint. A non-combustible treatment method for an FRP base material, comprising a step of conditioning the surface of the non-combustible base coat, and a step of applying an overcoat paint on the non-combustible base coat layer subjected to the above conditioning.