JPH05200356A - Coating method for blow-molded product consisting of polyphenylene ether/polyamide resin, intermediate coated product, and coated product - Google Patents

Abstract

PURPOSE:To obtain a coating film which is easily finished and has excellent appearance (smoothness, definition) without controlling the raw surface of a body to be coated by polishing or using a paste or without multilayer coating of a primer or an intermediate layer. CONSTITUTION:A primer is applied on a blow-molded product comprising polyphenylene ether/polyamide resin, then an intermediate coating having 70-90PHR pigment concn. is applied thereon, and then further a top coating material is applied. The primer consist essentially of modified polyolefin resin having -30 to -60 deg.C static glass transition temp., 85000-95000 weight-average mol.wt.(Mw), 60000-70000 number-average mol.wt.(Mn), and 1.30-1.45Mw/Mn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating a blow-molded product made of polyphenylene ether / polyamide resin, more specifically, a coating film having an excellent finished appearance can be easily obtained, which is particularly suitable for coating automobile parts. The present invention relates to a method for coating a blow molded product made of polyphenylene ether / polyamide resin.

[0002]

2. Description of the Related Art In recent years, due to the increasing awareness of car buyers,
High-quality painting is demanded due to the increasing trend toward high-class painting of automobile exterior panels. Above all, the needs for finished appearance, that is, surface smoothness and sharpness are increasing, and the achievement of the achievement is high for body skins. Along with this, automobile exterior parts such as spoilers that are mounted at positions that are directly contrasted with body skins are also required to have the same high-quality exterior appearance as body skins.

Conventionally, for exterior parts such as spoilers, paint is applied to a blow molded product made of a plastic material such as a sheet molding compound, low-foam urethane, polyphenylene ether / polyamide resin, etc. for weight reduction of the vehicle body and easy design. Things are being used.
This coating is usually performed in the following steps.

Conditioning, degreasing, primer coating, and baking of blow-molded product The primer adheres to the base of the blow-molded product, and at the same time, has the function of adhering the intermediate coating applied on it to itself and the impact resistance of the blow-molded product. Painted for the purpose of improving. In some cases, conductivity is imparted to the primer to facilitate the application of the intermediate coating material and the top coating material when electrostatically coating the intermediate coating material and the top coating material. Intermediate coating The intermediate coating is mainly made by concealing fine irregularities on the surface of blow-molded products coated up to the primer.
It has the function of giving more smoothness. It also plays the role of protecting the primer and base material from the ultraviolet rays that pass through the topcoat paint that is applied on top of the intermediate paint. Topcoat The topcoat imparts beauty to the blow-molded product and, in combination with the primer and intermediate coating, plays the role of protecting the blow-molded product from physical and chemical loads from the outside.

When a blow molding product made of a sheet molding compound or low-foam urethane is coated by the conventional coating method as described above, there are many small holes and voids on the surface of the base material of the blow molding product. Even if it is applied, the effect appears on the coating surface, pinholes on the coating surface,
There is a problem that craters etc. occur and a high-quality finished appearance cannot be obtained. For this reason, in order to obtain a high-quality finished appearance, it is necessary to adjust the base material by using polishing or putty, or to perform multi-layer coating in which a primer and an intermediate coating material are applied multiple times, which requires extra steps. Blow-molded articles made of sheet molding compound and low-foam urethane are inconvenient when processing hollow ornaments such as high mount stop lamps.

On the other hand, the blow-molded product obtained by blow-molding the polyphenylene ether / polyamide resin is very easy to process a decorative product such as a high-mount stop lamp because it is hollow, but on the other hand, it is a defect due to the blow-molding. Appears prominently. That is, in blow molding in which low-pressure air is blown, the die line formed when the resin is extruded from the molding machine die as a parison remains in the blow molded product, so even if paint is applied to this, the die line will be applied to the coated surface. Is reproduced exactly as it is, and there is a problem that a high-quality finished appearance cannot be obtained. Therefore, in order to obtain a high-quality finished appearance, it is necessary to adjust the base material or apply multi-layer coating, as in the case of a blow molding product made of a sheet molding compound or low-foam urethane.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above problems by providing a finished appearance (smoothness, sharpness) without lowering impact resistance, adhesion, water resistance and the like.
An object of the present invention is to propose a method for coating a blow-molded article made of a polyphenylene ether / polyamide resin, which can easily obtain a coating film excellent in heat resistance.

[0008]

The present invention provides a blow-molded article made of polyphenylene ether / polyamide resin,
Static glass transition temperature is −30 to −60 ° C., weight average molecular weight (Mw) is 85,000 to 95,000, number average molecular weight (Mn) is 60,000 to 70,000, and Mw / Mn is 1.
A primer having a modified polyolefin resin of 30 to 1.45 as a main component is applied, and a pigment concentration of 70 to 9 is applied on the primer.
This is a method for coating a blow-molded article made of a polyphenylene ether / polyamide resin, which comprises coating an intermediate coating composition of 0PHR and further coating an overcoat composition thereon.

The blow-molded article composed of the polyphenylene ether / polyamide resin used in the present invention is a resin composition composed of the polyphenylene ether resin and the polyamide resin, or if necessary, other resin and / or additives are added to the resin composition. It is a blow molded product obtained by blow molding the resin composition. As the polyphenylene ether / polyamide resin used as a material for blow-molded products, known products can be used.

The above polyphenylene ether resin includes an unsubstituted polyphenylene ether resin produced from phenol, a substituted polyphenylene ether resin substituted with various substituents, and modified products thereof.

The above-mentioned polyamide resin may be any one as long as it has an amide bond [-C (= 0) -NH-] in the polymer main chain and can be melted by heating, for example nylon 6 and nylon 6
6, nylon 12, etc.

The shape of the blow molded product used in the present invention is not particularly limited. When the coating method of the present invention is applied to a blow-molded product, the die line on the surface of the parison becomes invisible and a high-finish appearance can be obtained without adjusting the base material such as polishing the blow-molded product.

Since the polyphenylene ether / polyamide resin is excellent in heat resistance, a blow molded product made of it can be baked at high temperature.

The primer used in the present invention has a static glass transition temperature of -30 to -60 as a physical property value after modification.
℃, preferably -40 to -55 ℃, weight average molecular weight (M
w) is 85,000 to 95,000, preferably 88,000
~ 93000, number average molecular weight (Mn) is 60000-7
0000, preferably 62000 to 67,000, Mw /
Mn is 1.30 to 1.45, preferably 1.35 to 1.
It is a solution-type coating material containing 40 modified polyolefin resins as a main component.

The modified polyolefin resin is a homopolymer or copolymer of an α-olefin having 2 to 4 carbon atoms such as ethylene, propylene, butene, and a carboxylic acid or carboxylic anhydride having a polymerizable double bond. Modified by graft polymerization, halogenated, a mixture of these modified products and unmodified products, and the like.

Specific examples of the modified polyolefin resin include, for example, a propylene-ethylene copolymer (for example, a propylene: ethylene molar ratio of 40-80: 60-).
20) 0.1 to 50 parts by weight, preferably 0.3 to 20 parts by weight, of graft-polymerized maleic acid or maleic anhydride per 100 parts by weight; 100 parts by weight of the propylene-ethylene copolymer and chlorinated polyolefin ( Chlorination rate 1-60%) 1-50 parts by weight, preferably 10-2
A mixture containing 0 parts by weight can be used.

Examples of the solvent for the primer used in the present invention include aromatic hydrocarbons such as benzene, toluene and xylene; aliphatic hydrocarbons such as hexane and heptane; methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol and the like. Examples thereof include alcohols; ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; esters such as ethyl acetate, butyl acetate and cellosolve. The paint solid content of the primer used in the present invention is 15 to 15 when the paint is diluted when sprayed.
30% by weight, preferably 20 to 25% by weight is desirable.

In the primer used in the present invention, the static glass transition temperature of the modified polyolefin resin deviates from the above range, or the static glass transition temperature is changed even within the above range. In this case, a viscosity-imparting agent can be added if necessary.

Examples of the viscosity imparting agent include rosin, petroleum resin (coumarone), ester gum, polybutadiene, low molecular weight aliphatic epoxy resin, low molecular weight aliphatic bisphenol type epoxy resin, polyoxytetramethylene glycol, vinyl acetate modified polyethylene and the like. Examples thereof include those having good compatibility with the modified polyolefin resin. The compounding amount of the viscosity-imparting agent is preferably 50 parts by weight or less per 100 parts by weight of the modified polyolefin resin.

Further, in order to improve the coatability of the primer, it is preferable that the viscosity imparting agent is dissolved or dispersed in an organic solvent. As the organic solvent, for example, benzene,
Aromatic hydrocarbons such as toluene and xylene; hexane,
Aliphatic hydrocarbons such as heptane, octane and decane; chlorinated hydrocarbons such as trichloroethylene, perchlorethylene, dichloroethylene, dichloroethane, dichlorobenzene and the like can be mentioned.

The primer used in the present invention is mixed with a conductive substance for the purpose of improving electrostatic coating on a resin blow-molded product, and the coating has a volume resistivity of 1 × 10 ⁷ Ω.
cm or less, preferably 1 × 10 ³ to 1 × 10 ⁵ Ωcm.

Examples of the conductive substance include conductive carbon, silver, nickel, aluminum, zinc oxide, tin dioxide, tungsten oxide, conductive-treated titanium white, conductive-treated potassium titanate, and whiskers. it can. The blending amount of the conductive substance may be within a range that does not cause deterioration of the physical performance of the primer coating film, and specifically, it is 10 per 100 parts by weight of the modified polyolefin resin.
It is preferably 0 parts by weight or less.

Further, the primer used in the present invention includes
Pigments such as extender pigments, coloring pigments (excluding anticorrosion pigments), and other additives usually added to a primer can be added. The amount of pigment blended is modified polyolefin resin 10
It is preferably 100 parts by weight or less per 0 parts by weight.

In the present invention, by using the modified polyolefin resin having the above-mentioned characteristic values, fine atomization at the time of spraying is good, and the flowability of the wet coating film at the time of application to the object to be coated is good. The coating solid content can be as high as 15% by weight or more, and the coating film thickness is 10 μm.
It can be applied thicker than above, good compatibility with pigments, good solubility in solvent, so rough skin due to self-dust disappears, self-skin and intermediate coat and top coat over it It is possible to obtain a primer having excellent properties such as a good finish on the final coated surface and the same properties as conventional ones such as adhesion to a substrate, impact resistance, and moisture resistance.

By applying such a primer to a blow-molded product made of polyphenylene ether / polyamide resin, the properties such as adhesion to the substrate, impact resistance, and moisture resistance can be maintained at the same level as in the conventional technique. It is possible to form a coating film that covers the irregularities of No. 1 and has excellent finished appearance, that is, smoothness and sharpness. For example, PGD (Portable Gloss Dispenser) measured by a portable sharpness gloss meter manufactured by Japan Color Research Institute on the final top-coating surface in which the primer and the middle coat are overlaid.
It is possible to finish the tinctness value to 1.0 or more (horizontal coating to horizontal baking).

On the other hand, when the value of the molecular weight of the modified polyolefin resin exceeds the above range, the physical and chemical performance of the coating film is improved by the lacquer effect, but the compatibility with the pigment is poor. , The fineness of the particles during spray coating deteriorates, the flowability of the wet coating film when applied to an object to be coated deteriorates, and the solubility in solvents deteriorates, causing rough skin due to self-dust. Since the solid content decreases, problems such as the inability to coat a thick film of 10 μm or more occur on the primer, and the surface of the coating film does not become good.

For this reason, even if the intermediate coating and the top coating are applied over such a primer, the poor surface shape of the primer affects, and the final top coating surface cannot obtain a high finished appearance. For example, on the final top coating surface, PGD measured with a portable sharpness gloss meter made by Japan Color Research Institute
It is difficult to finish the value over 0.9 (horizontal coating to horizontal baking).

On the other hand, when the value of the molecular weight of the modified polyolefin resin is smaller than the above range, the problems due to the large molecular weight are alleviated, but the physical and chemical performance of the coating film is deteriorated.

If the Mw / Mn molecular weight distribution of the modified polyolefin resin exceeds the above range, it means that the molecular weight distribution is broad, and the presence of a high molecular weight substance is a factor that hinders the formation of a good coating surface. Becomes A smaller size is advantageous for good coating surface formation, but the manufacturing process is complicated and the manufacturing cost is accordingly increased, which is not practical.

When the static glass transition temperature of the modified polyolefin resin is higher than the above range, the solution viscosity becomes high and a coating material having a high solid content cannot be obtained. Therefore, the roughness of the blow-molded product is hidden. Therefore, it becomes difficult to apply the required film thickness. In addition, the adhesion with the blow molded product tends to deteriorate. When it is lowered, a coating material having a high solid content is obtained and the adhesion with the blow molded product is secured, but the coating film has a weak resistance to external load, and has weather resistance, water resistance, gasoline resistance, The coating properties such as solvent properties tend to deteriorate.

The static glass transition temperature in the present invention is a value measured by a differential scanning calorimeter.

The intermediate coating composition used in the present invention has a pigment concentration of 70 to 90 PHR (Pigment per Han).
dred Resin), preferably 80 to 90 PHR
It is the paint of. The type of pigment is not particularly limited, and known extender pigments and coloring pigments can be used. In addition, PHR is resin 1
The parts by weight of pigment per 00 parts by weight are shown.

As such an intermediate coating material, adhesiveness,
It has excellent smoothness, sharpness, overbaking resistance, weather resistance, etc., and it is possible to use paints that have been used as intermediate coatings from the past, but it is especially important to use those with consideration for sharpness. preferable. Moreover, the pencil hardness of the intermediate coating film is 3B to
Those in the range of 2H are preferable.

Specific examples of the intermediate coating composition include, as a vehicle main component, a short oil having an oil length of 30% or less, an ultrashort oil alkyd resin or an oil-free polyester resin and an amino resin, and titanium oxide as a pigment. Examples thereof include organic solution type thermosetting intermediate coating materials containing barium sulfate, zinc oxide, silicon dioxide, carbon black, red iron oxide, and ordinary organic pigments.

The alkyd resin and polyester resin of the intermediate coating composition have a hydroxyl value of 60 to 140 and an acid value of 5 to 2
It is 0, and unsaturated oil or unsaturated fatty acid is used as the modified oil. Further, as the amino resin, an alkyl (C 1 to C 5) etherified melamine resin,
Urea resin, benzoquanamine resin and the like are preferable. The blending ratio of these resins is based on the weight of the resin, and the alkyd resin and / or oil-free polyester resin is 65 to
85%, preferably 70-80%, amino resin 35-35
15%, preferably 30 to 20% is desirable.

By using an intermediate coating composition having a pigment concentration of 70 to 90 PHR, the resin component is contained in a larger amount than the pigment component, so that atomization during spraying is improved.
Similarly, the flowability is increased, especially due to the large fluidization of the resin due to the initial heating during baking.
As a result of the resin layer being formed in the vicinity of the surface layer of the coating film, the smoothness and sharpness of the intermediate coating surface itself are significantly improved. Therefore, the appearance of the final top-coating surface, which has been over-coated, becomes excellent.

When the pigment concentration exceeds the above range, atomization during spraying becomes relatively poor, the flow during coating and the flow during heating for baking become poor, and the pigment content is on the coating surface and surface. Since they are present close to each other, fine irregularities are formed on the surface. As a result, the appearance of the intermediate coating surface and the top coating surface is deteriorated.

There is no particular limitation on the topcoat paint used in the present invention, and paints conventionally used as topcoat paints can be used. Top-coat paints are generally classified into metallic paints and / or solid color finish paints containing metallic pigments and / or coloring pigments, and clear paints (including color clear paints) containing no or almost no such pigments. Can be used, but the finished appearance (visibility, smoothness, glossiness, etc.), weather resistance (gloss retention, color retention, chalking resistance, etc.), chemical resistance,
A coating material capable of forming a coating film excellent in water resistance, moisture resistance, curability and the like is preferable. Further, it is preferable that the top coat film has a pencil hardness in the range of 2B to 3H. For example, a high temperature baking paint for automobile body outer panels, especially a paint that is considered to have a good finished appearance, can be preferably used.

Specific examples of the top-coat paint include paints whose main component is a vehicle such as amino / acrylic resin type, amino / fluorine resin type, amino / alkyd resin type, amino / polyester resin type. it can. The form of these paints is not particularly limited, and organic solution type, non-aqueous dispersion type, water (dispersion) liquid type, high solid type and the like can be used.

In the coating method of the present invention, the primer coating method is not particularly limited. For example, spray coating,
The surface of the blow-molded product made of polyphenylene ether / polyamide resin is coated by a method such as brush coating, dip coating, melt coating, and electrostatic coating. The coating film is preferably formed by baking.

When the intermediate coating material is applied to the primer coating surface, it is preferable to bake the primer in advance, but the intermediate coating material may be applied wet-on-wet without baking. The baking may be carried out under the condition that the resin blow-molded product is not deformed or deteriorated. Since the polyphenylene ether / polyamide resin is very excellent in heat resistance, it is usually 120 to 160 ° C. for 10 to 40 minutes, preferably 130 to 140 ° C. 20 to 30 minutes is desirable.
Even if baking is performed at such a high temperature, the resin blow-molded product is not deformed, and the coating film is free from waviness and distortion, and a high-finished appearance can be obtained.

The coating film thickness of the primer is 1 to 20 μm, preferably 10 to 15 μm based on the formed film thickness.

Next, the above-mentioned intermediate coating material is applied to the surface of the primer coating, but the coating method is not particularly limited, and the same coating method as that for the primer is applied.

The coating film is preferably formed by baking. The baking may be performed under the condition that the resin blow-molded product is not deformed or deteriorated, and is usually 120 to 160 ° C. for 10 to 40 minutes, preferably 130 to 140 ° C. for 20 to 30 minutes.

The coating thickness of the intermediate coating composition is 20 to 35 μm, preferably 25 to 30 μm, based on the cured coating film.

Next, the above-mentioned topcoat paint is applied on the surface of the intermediate coating film. The coating method is not particularly limited, but spray coating, electrostatic coating or the like is preferable. The top coat is the same paint as the outer panel of the car, and can be coated at the same time.

The coating film is preferably formed by heating and drying. For example, after applying the metallic paint or the solid color paint, and subsequently applying the clear paint,
For example, a two-coat, one-bake metallic or solid color finish that heats both coatings at the same time, or a one-coat, one-bake solid color finish that coats and heats a solid color paint containing a color pigment. The method can be adopted. The heating and drying may be performed under the condition that the resin blow-molded product is not deformed or deteriorated.
10 to 40 minutes at 160 ° C., preferably 130 to 140
20 to 30 minutes at 0 ° C is desirable.

The coating film thickness of the top coating film is based on the dry coating film. In the above, the metallic paint or the solid color paint is 10 to 30 μm, preferably 15 to 25 μm, and the clear paint is 25 to 50 μm, preferably 30 to 35 μm.
m, in the above, 25 to 45 μm, preferably 30 to 40
μm is desirable.

[0049]

EXAMPLES Next, examples and comparative examples relating to the present invention will be described. In the examples, parts and percentages are by weight. The static glass transition temperature was measured with a differential scanning calorimeter (DSC-10 type) manufactured by Daini Seikosha.

Examples 1 to 3 and Comparative Examples 1 to 6 (Production of blow-molded products) Polyphenylene ether / polyamide resin [Noryl G-90-0006, manufactured by Nippon GE Plastics Co., Ltd., trade name] is blow-molded. 1
Obtain a cut plate-shaped blow molded product of 50 × 70 × 3 mm,
This molded product was steam degreased with trichloroethane.

(Primer) A: Primer A A resin obtained by graft-polymerizing maleic acid onto a propylene-ethylene copolymer (static glass transition temperature -43 ° C, weight average molecular weight (Mw) 90,000, number average molecular weight 6).
5000 parts by weight of Mw / Mn = 1.38) xylol solution (solid content: 28%) was dispersed in 5 parts by weight of Printex L-6 [trademark] manufactured by Degussa Co., Ltd. as a conductive carbon to obtain a mixture. It was dissolved in 50 parts by weight of xylol to obtain primer A. The volume resistivity of the coating film was 2.3 × 10 ³ Ωcm.

B: Primer B Resin obtained by graft-polymerizing maleic acid on propylene-ethylene copolymer (static glass transition temperature -43 ° C, weight average molecular weight (Mw) 135,000, number average molecular weight 39000, Mw / Mn = 3.46) xylol solution (solid content 14%) 100 parts by weight, and 5 parts by weight of Printex L-6 [trademark] manufactured by Degussa Co. as conductive carbon were dispersed, and the resulting mixture was mixed with 50 parts by weight of xylol. To obtain Primer B. The volume resistivity of the coating film was 2.3 × 10 ³ Ωcm.

(Intermediate coating paint) A: Intermediate coating paint A Lugerbake intermediate coating [pigment concentration 80 PHR, manufactured by Kansai Paint Co., Ltd., trademark, amino / polyester resin coating, hydroxyl value 56 of polyester resin, acid value 4, Amino resin is isobutanol-modified melamine resin] B: Intermediate coating B Lugerbake intermediate coating [pigment concentration 100 PHR, Kansai Paint Co., Ltd. trademark, amino polyester resin coating, hydroxyl value 56 of polyester resin, acid value 4, amino resin Is isobutanol-modified melamine resin)

(Topcoat paint) A: Topcoat paint A Magiclon Black [trademark, manufactured by Kansai Paint Co., Ltd., amino / acrylic resin type metallic 2C1B basecoat] B: Topcoat paint B Fluorine clear [trademark manufactured by Kansai Paint Co., Ltd. , Amino / fluorine resin type 2C1B clear] C: Top coat C C Magiclon clear [Kansai Paint Co., Ltd., trademark, Amino / acrylic resin type 2C1B clear] D: Top coat D Amirak White [Kansai Paint Co., Ltd., trademark , Amino-alkyd resin-based 1C1B solid coat]

(Film coating performance test) The above-mentioned primer was air-sprayed, and the intermediate coating composition and the top coating composition were electrostatically coated on the cut-out plate-shaped blow molded product made of the polyphenylene ether / polyamide resin, as shown in Table 1. Then, various coating film performance tests were conducted. The test method is as follows. The results are shown in Table 2.

Image clarity PGD (Portable Gloss Distin)
ctness) Image clarity tester (Portable sharpness / gloss meter)
It was measured by [(Fund) Nippon Color Research Laboratory]. Smoothness It was visually evaluated according to the following criteria. ⊚: Good ○: Slightly orange-colored skin was observed. Δ: Strained skin was observed. Adhesion Adhesive cellophane tape was applied to the surface of the coating film according to JIS K5400-1979 6.15. The coated surface after being worn and rapidly peeled off was evaluated. Moisture resistance After leaving still in a blister box at 50 ° C. and 95% RH for 240 hours, it was taken out, and after 24 hours, the above adhesion test and the presence or absence of blister generation were examined. Impact resistance It was performed in an atmosphere of 0 ° C according to JIS K5400-1979 6.13.3 B method. A weight of 500 g was dropped from a height of 50 cm to examine the damage of the coating film.

[0057]

[Table 1]

[0058]

[Table 2]

[0059]

As described above, according to the present invention, the modification in which the static glass transition temperature, the weight average molecular weight (Mw), the number average molecular weight (Mn) and the molecular weight distribution of Mw / Mn are controlled within a specific range. A polyolefin resin-based primer is applied to a blow-molded product made of polyphenylene ether / polyamide resin, which is suitable for automobile parts, and then an intermediate coating with a pigment concentration in a specific range is applied. Since the top coating is applied to the top, it does not reduce impact resistance, adhesion, water resistance, etc. without the need for polishing or using putty to adjust the base material or to apply multiple layers of primer or intermediate coating. A coating film excellent in finished appearance (smoothness, sharpness) can be easily obtained.

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[Procedure amendment]

[Submission date] March 2, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008]

The present invention provides the following polyphene:
Blow molded products made of Nylene ether / Polyamide resin
The coating method, intermediate coating products and coated products. (1) From polyphenylene ether / polyamide resin
The blow-molded product has a static glass transition temperature of -30 to-
60 ° C, weight average molecular weight (Mw) is 85,000 to 950
00, number average molecular weight (Mn) is 60,000 to 7,000
0, modified polyolefin with Mw / Mn of 1.30 to 1.45
Apply a primer whose main component is resin, and then
An intermediate coating with a pigment concentration of 70 to 90 PHR was applied to
A port characterized by applying a top-coat paint to an intermediate coated product.
Blow made of rephenylene ether / polyamide resin
How to paint molded products. (2) From polyphenylene ether / polyamide resin
The blow-molded product has a static glass transition temperature of -30 to-
60 ° C, weight average molecular weight (Mw) is 85,000 to 950
00, number average molecular weight (Mn) is 60,000 to 7,000
0, modified polyolefin with Mw / Mn of 1.30 to 1.45
Apply a primer whose main component is resin, and then
An intermediate coating with a pigment concentration of 70 to 90 PHR was applied to
An intermediate coated product characterized by that. (3) From polyphenylene ether / polyamide resin
The blow-molded product has a static glass transition temperature of -30 to-
60 ° C, weight average molecular weight (Mw) is 85,000 to 950
00, number average molecular weight (Mn) is 60,000 to 7,000
0, modified polyolefin with Mw / Mn of 1.30 to 1.45
Apply a primer whose main component is resin, and then
An intermediate coating with a pigment concentration of 70 to 90 PHR was applied to
A coating characterized by applying a top coating to an intermediate coated product
Equipment.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction content]

Thus obtained by applying the intermediate coating composition
The above-mentioned topcoat paint is applied to the surface of the intermediate coating film of the intermediate coated product to produce the coated product of the present invention. There is no limitation on the method of applying the top coating, but spray coating, electrostatic coating or the like is preferable. The top coat is the same paint on the outer panel of the car, and can be applied simultaneously.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0059

[Correction method] Change

[Correction content]

[0059]

As described above, according to the present invention, the modification in which the static glass transition temperature, the weight average molecular weight (Mw), the number average molecular weight (Mn) and the molecular weight distribution of Mw / Mn are controlled within a specific range. A primer mainly composed of polyolefin resin is applied to a blow-molded product made of polyphenylene ether / polyamide resin suitable for automobile parts, and an intermediate coating product with a pigment concentration in a specific range is applied on the intermediate coated product . Paint topcoat paint to make painted products
Since so as to granulation, even without a multi-layer coating of surface preparation or primer or intermediate of using abrasive or putty, impact resistance, adhesion, without reducing the water resistance, finished appearance ( A coating film excellent in smoothness and sharpness can be easily obtained.

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Claims (1)

[Claims] 1. A blow molded article made of polyphenylene ether / polyamide resin has a static glass transition temperature of -3.
0 to -60 ° C, weight average molecular weight (Mw) is 85,000
95,000, number average molecular weight (Mn) is 60,000 to 70
000, Mw / Mn of 1.30 to 1.45 is applied as a main component of a modified polyolefin resin, a pigment concentration of 70 to 90 PHR is applied as an intermediate coating, and then a top coating is applied. A method for coating a blow-molded product made of polyphenylene ether / polyamide resin, characterized by applying a paint.