JPS59159834A - Formation of coating film on rim for use in automobile outside plate - Google Patents
Formation of coating film on rim for use in automobile outside plateInfo
- Publication number
- JPS59159834A JPS59159834A JP3173683A JP3173683A JPS59159834A JP S59159834 A JPS59159834 A JP S59159834A JP 3173683 A JP3173683 A JP 3173683A JP 3173683 A JP3173683 A JP 3173683A JP S59159834 A JPS59159834 A JP S59159834A
- Authority
- JP
- Japan
- Prior art keywords
- rim
- paint
- coating film
- coating
- room temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
Abstract
Description
【発明の詳細な説明】
繊維等で強化された゛反応射出成形樹脂(RIM)、特
にウレタンRI’M,ナイロンRIM基村上に塗膜を形
成する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a coating film on a reaction injection molded resin (RIM) reinforced with fibers or the like, particularly on a urethane RI'M or a nylon RIM.
従来の自動車の外板用塗膜の形成が法としては、鋼板の
表面に化成皮膜処理を行い、この上に電着塗料、チッピ
ングプライマ、中塗塗料、上塗塗料の順に塗装を行う方
法が用いられている。この内上塗塗料および中塗塗料に
ついては次の第1表に示す塗料が主として使用されてい
る。The conventional method for forming automobile exterior coatings is to apply a chemical conversion coating treatment to the surface of a steel plate, and then apply electrocoating paint, chipping primer, intermediate coat paint, and top coat paint over this in that order. ing. As for the inner top coat and intermediate coat, the paints shown in Table 1 below are mainly used.
第 1 表
しかしながら、このような従来の自動車外板用塗膜形成
方法にあっては、被塗物が鋼板であり、°その剛俳が塗
膜より著しく大であるため塗膜が被塗物の物性に及ぼす
影響を考える必要がなかった。Table 1 However, in this conventional method for forming coating films for automobile exterior panels, the object to be coated is a steel plate, and its stiffness is significantly larger than that of the coating film, so the coating film is difficult to coat. There was no need to consider the effect on the physical properties of the material.
しかし自動車の軽量化を指向する中で外板を鋼板からウ
レタンRIMやナイロンRI’Mのよコな軽量のプラス
チックのRIMに変える動きがあるが、このようなプラ
スチック製外板に従来の自動車鋼板用塗料を塗装すると
、プラスチックの特徴であるじん性を低下させてしまう
という問題が発生する。例えば第1図に示すようにRI
’M外板]に鋼板用中塗(伸び4係)2および鋼板用上
塗(伸び4チ)8を塗装したものが矢印の方向に引張ら
れると引張りによる塗膜の割れがノツチ4となり、その
部分に応力が集中し、R工M 1も合わせて割れるとい
う現象が生ずる〇一方この問題を解決するために自動車
のウレタンバンパーに用いられているような伸びのある
塗料を塗装するとじん性の低下は防止されるが、屋外曝
露Gこよる光沢の低下を起し、また色差が従来の自動車
外板用塗料より劣つでしまうという問題点があった0
本発明はこのような従来の問題点に着目してなされたも
ので、ウレタンRIM、ナイロンRIMの?これらのR
IMの伸びに応じた伸びを有する特定の塗料を下塗塗料
として塗装し、この上に上塗塗料を塗装することにより
上記問題点を解決することを目的としてい、斧。However, with the aim of reducing the weight of automobiles, there is a movement to change the exterior panels from steel plates to lightweight plastic RIMs such as urethane RIM and nylon RI'M. If you apply a plastic paint, the problem arises that it reduces the toughness, which is a characteristic of plastics. For example, as shown in Figure 1, RI
When a steel plate intermediate coat (elongation 4) 2 and a steel plate top coat (elongation 4) 8 are applied to the 'M outer panel' and it is pulled in the direction of the arrow, the crack in the coating film due to the tension becomes notch 4, and the part Stress concentrates on the R work M1, causing it to crack as well. On the other hand, to solve this problem, applying a stretchy paint such as that used for automobile urethane bumpers reduces toughness. However, there are problems in that the gloss decreases due to outdoor exposure and the color difference is inferior to that of conventional automobile exterior paints.The present invention solves these conventional problems. It was made with a focus on urethane RIM, nylon RIM? These R
Ax aims to solve the above problems by applying a specific paint that has an elongation corresponding to the elongation of IM as an undercoat and then applying a topcoat on top of this.
本発明の方法により塗膜を形成する外板用プラスチック
のRIMとは、室温で添加ガラス繊維の配向方向に垂直
に引張った場合40〜80φの伸び率(δR)を示すウ
レタンRIM、ナイロンRIMのようなRIMであり、
前記目的を満たすため下塗塗料に室温で次の条件=(基
材の伸び率X0.5)≦下塗塗膜の伸び率≦40チ
を満足する塗料を用い、
上塗に室温で次の条件:
下塗塗膜の伸び率が30%以下の場合
10チ≦上塗塗膜の伸び率≦15φ
下塗塗膜の伸び率が80チより大の場合1チ≦上塗塗膜
の伸び率〈】oチ
8満足する塗料を用いることを必要とする。RIM for plastics for exterior panels on which a coating film is formed by the method of the present invention includes urethane RIM and nylon RIM, which exhibit an elongation rate (δR) of 40 to 80φ when pulled perpendicularly to the orientation direction of added glass fibers at room temperature. In order to meet the above objective, a paint that satisfies the following condition = (elongation rate of base material Under the following conditions: If the elongation rate of the undercoat film is 30% or less, 10 inches ≦ The elongation rate of the top coat film ≦ 15φ If the elongation rate of the undercoat film is greater than 80 inches, 1 inch ≦ The elongation rate of the top coat film 〈〈〈〈It is necessary to use a paint that satisfies 8.
本発明の方法においては、前記外板用プラスチックのR
IM基村上に先ず下塗塗料を塗布するが、この下塗塗料
はRIMとの初期密着性および耐渇水後の2次密着性を
保証するとともにRIMが外部から変形を受けた場合の
上塗りの割れによる応力の集中を吸収し、即ち第2図に
示すように引張りによる塗膜の割れに伴う応力集中を下
塗塗料が緩和しRIMの割れにつながらない作用をする
役割をはだすもので、このためには前記条件を満足する
ことが必要であり、なかでも伸びがあり且つ基材との密
着性の優れたウレタン塗料、例えばポリエーテルウレタ
ン塗料(例えば日本油脂製、プラグロス/161’0O
O1YE−100)、ポリエステルウレタン塗料(例え
ば日本油脂製、プラグロス況1000、YE−100)
、ポリエステルウレタン塗料(例えば日本油脂製、プラ
グロスYE−500)、アクリルウレタン塗料(例えば
日本油脂製、プラグロス屑2000、YE’−550’
)等を用いるのが好ましい0尚こ′こで注意すべきこと
は下塗に用いる20%(RIMの伸び率範囲の°最小(
40%)Xo、5)〜40係の伸び率を有する塗料はウ
レタンでなければ耐久後の密着性を保てないということ
で、例えばメラミン系のアクリルメラミン、アクリルメ
ラミン、を用いると初期のごばん目密着は満足するもの
の耐温水性試験後の2次密着は劣ってしまう。In the method of the present invention, R of the plastic for outer panels is
First, an undercoat is applied over the IM base coat, and this undercoat guarantees initial adhesion with the RIM and secondary adhesion after drought resistance, and also protects against stress caused by cracks in the topcoat when the RIM is deformed from the outside. In other words, as shown in Figure 2, the undercoat plays the role of alleviating the stress concentration that occurs when the coating film cracks due to tension, thereby preventing the RIM from cracking. In particular, urethane paints that are stretchable and have excellent adhesion to the base material, such as polyether urethane paints (for example, Nippon Oil & Oil Co., Ltd., Plaglos/161'0O
O1YE-100), polyester urethane paint (e.g. Nippon Oil & Fats Co., Ltd., Pragloss Sho 1000, YE-100)
, polyester urethane paint (e.g. Nippon Oil & Fats Co., Ltd., Plaglos YE-500), acrylic urethane paint (Nippon Oil & Fats Co., Ltd., Plaglos Kuzu 2000, YE'-550')
) etc. 0 Note that it is preferable to use 20% (°minimum (
40%) Although the cross-mesh adhesion was satisfactory, the secondary adhesion after the hot water resistance test was poor.
尚第2図は、第1図ではRIMに直接鋼板用中塗および
上塗塗料を塗装したのに対し、本発明の方法によりRI
M外板1に下塗として前記条件を満足するRIM用ウジ
ウレタン塗料5布し、この上に鋼板用上塗(伸び4%)
3を塗装するとこれを矢印の方向Gこ引張った場合、図
示するように引張りによりノツチ4が生ずるが、引張り
(・こよる塗膜の割れに伴う応力集中をRIM用ウジウ
レタン塗料5和し、第1図の場合のようなRI Mの割
れにつながらないことを示す。In addition, Fig. 2 shows that, whereas in Fig. 1, the RIM was directly coated with the intermediate coat and top coat for steel plates, the method of the present invention was used to apply the RIM.
Apply 5 coats of RIM urethane paint that satisfies the above conditions as an undercoat to the M outer panel 1, and apply a topcoat for steel plates (4% elongation) on top of this.
When 3 is applied and it is pulled in the direction of the arrow G, a notch 4 is generated due to the tension as shown in the figure. This shows that this does not lead to cracking of the RIM as in the case of FIG.
次に本発明の方法においては、前記ド塗塗膜の上に直接
上塗塗料を塗布する。この上塗塗料は自動車外板用とし
ての耐候性を保持する効果を持つもので、このため前記
条件を満足し、耐候性の優・れる塗料を用いる0かかる
塗料には第】表に示した上塗塗料の他にウレタン塗料(
例えば日本油脂製、プラグロスA40.0O1HI’−
100)があり、この中から基材と下塗に適合するよう
に適宜選定すればよい。Next, in the method of the present invention, a top coat is applied directly onto the coated film. This top coat paint has the effect of maintaining weather resistance for automobile exterior panels. Therefore, a paint that satisfies the above conditions and has excellent weather resistance is used. In addition to paint, urethane paint (
For example, Nippon Oil & Fats, Plugloss A40.0O1HI'-
100), and an appropriate one may be selected from these to suit the base material and undercoat.
上述のように本発明の方法によると、2層の塗膜の構成
により自動車外板用プラスチック基材のウレタンRIM
、ナイロンRIMのようなRIMのじん性を低下させる
ことなく、耐候性、塗膜物性、鮮映性に督れ、現行自動
車外板用塗料と同等の塗膜ができるという効果が得られ
る。As described above, according to the method of the present invention, the urethane RIM of the plastic base material for automobile exterior panels is made of a two-layer coating film.
, the weather resistance, physical properties of the coating film, and sharpness are excellent without reducing the toughness of RIMs such as nylon RIMs, and it is possible to obtain a coating film equivalent to that of current automobile exterior paints.
次に本発明を実施例および比較例により説明する0
実施例1
40%の伸び率を有する外板用ウレタン塗料Mをホワイ
トガソリンを用いて脱脂した0次いでこのウレタン塗料
Mに20係の伸び刃を有するアクリルウレタン塗料(日
本油脂製、プラグロス、7+63000、YE−550
)を約30μスプレー塗装し、10分間セツティングし
た後、80℃のオーブンで30分焼付けた。焼付後更に
15q6の伸び率を有するアクリルウレタン塗料を約8
0μスプレー塗装し、10分間セツティングした後12
0℃で30分焼付・げた。このようにして作製した試験
片(大きさ1 t”lrL X 6 cIrしたんざく
状)についてJIs K5400に従って耐温水性試
験、耐薬品性試験、耐候性試験(サンシャインウェザ−
メータ使用)等を行い塗膜の性能が現行外板用塗料に要
求される性能を満足しているかを確認するとともに、試
験片(8号ダンベルχを用い25℃にて万能引張試験機
(オートグラフ)により300mm/ minの条件で
RIMの伸びを測定し、試験片(]CrrLxemたん
ざく状)を用い25℃にて万能引張試験機(テンシロ、
ン)により5 am / min (スパン40朋)の
条件で塗膜の伸びを測定し、得た結果を第3表に示す。Next, the present invention will be explained with reference to Examples and Comparative Examples.Example 1 A urethane paint M for exterior panels having an elongation rate of 40% was degreased using white gasoline.Then, this urethane paint M was coated with an elongation blade of 20%. Acrylic urethane paint with
) was spray-painted with a coating of about 30μ, allowed to set for 10 minutes, and then baked in an oven at 80°C for 30 minutes. After baking, add about 80% of acrylic urethane paint with an elongation rate of 15q6.
After 0μ spray painting and setting for 10 minutes,
Bake and heat at 0℃ for 30 minutes. The thus prepared test piece (size: 1 t"lrL x 6cIr) was subjected to a hot water resistance test, a chemical resistance test, and a weather resistance test (sunshine weather) in accordance with JIs K5400.
In addition to checking whether the performance of the paint film satisfies the performance required for current exterior paints, test pieces (using a No. 8 dumbbell χ at 25°C with a universal tensile tester The elongation of RIM was measured at 300 mm/min using a graph), and the test piece was tested using a universal tensile testing machine (Tensiro,
The elongation of the coating film was measured under the conditions of 5 am/min (span: 40 mm) using a 300° C. test method, and the results are shown in Table 3.
尚表中の伸びの変化率(係)は吹成により計算した。The rate of change in elongation (correspondence) in the table was calculated by blowing.
実施例2〜】0.比較例1〜】1
第2表に示す被塗物および下塗、中塗、上塗の各塗料を
用い、実施例1と同様(こして実施例2〜20および比
較例1〜11の20種の試験片を作製し、次いで実施例
1の場合と同様の試験を行い、得た結果を第8表Gこ示
す。Example 2~]0. Comparative Examples 1 to 1 1 Same as Example 1 (20 types of tests of Examples 2 to 20 and Comparative Examples 1 to 11 Pieces were prepared and then tested in the same manner as in Example 1, and the results obtained are shown in Table 8G.
第1図はRIMに鋼板用中塗および上塗を塗装した場合
のRIMの物性低下の説明図1、第°2図は本発明方法
によりRIMの物性低下が防止される状態を示す説明図
であ名。
】・・・RIM外板
2・・・中塗
8・・上塗
4・・塗膜に形成された割れノツチ
5・・下塗
特許出願人 日産自動車株式会社
第1図
第2図Figure 1 is an explanatory diagram of the deterioration of RIM's physical properties when RIM is coated with a steel plate intermediate coat and top coat, and Figure 2 is an explanatory diagram showing the state in which deterioration of RIM's physical properties is prevented by the method of the present invention. . ]...RIM outer plate 2...Intermediate coat 8...Top coat 4...Crack notches formed in the coating film 5...Undercoat Patent applicant Nissan Motor Co., Ltd. Figure 1 Figure 2
Claims (1)
合40〜80チの伸び率を有する自動車外板用RIM基
村上に塗膜を形成するに当り、 下塗に室温で次の条件: (基材の伸び率X0.5)≦下塗塗膜の伸び率≦40チ を満足する塗料を用い、 上塗に室温で次の条件: 下塗塗膜の伸び率が80チ以下の場合 10%≦上塗塗膜の伸び率515% 下塗塗膜の伸び率ガ30チより大の場合1%≦上塗塗膜
の伸び率(1o% を満足する塗料 を用い、基材上に下塗塗料、上塗塗料の順で塗布するこ
とを特徴とする自動車外板用R工Mの塗膜形成方法。[Scope of Claims] 1. When forming a coating film on a RIM substrate for automobile exterior panels that has an elongation rate of 40 to 80 inches when pulled perpendicularly to the orientation direction of the added fibers at room temperature, the undercoat is coated at room temperature. The following conditions: Use a paint that satisfies (base material elongation rate If the elongation rate of the undercoat film is greater than 30%, use a paint that satisfies the following: 10%≦Elongation rate of the topcoat film is 515%.If the elongation rate of the undercoat film is greater than 30%, use a paint that satisfies the following: A method for forming a coating film of R-work M for automobile exterior panels, characterized in that the coating is applied in the following order: , top coat paint.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3173683A JPS59159834A (en) | 1983-03-01 | 1983-03-01 | Formation of coating film on rim for use in automobile outside plate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3173683A JPS59159834A (en) | 1983-03-01 | 1983-03-01 | Formation of coating film on rim for use in automobile outside plate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59159834A true JPS59159834A (en) | 1984-09-10 |
Family
ID=12339316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3173683A Pending JPS59159834A (en) | 1983-03-01 | 1983-03-01 | Formation of coating film on rim for use in automobile outside plate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59159834A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6138665A (en) * | 1984-07-31 | 1986-02-24 | Toyota Motor Corp | Coating method of reinforced reaction injection molded article |
-
1983
- 1983-03-01 JP JP3173683A patent/JPS59159834A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6138665A (en) * | 1984-07-31 | 1986-02-24 | Toyota Motor Corp | Coating method of reinforced reaction injection molded article |
JPH0239951B2 (en) * | 1984-07-31 | 1990-09-07 | Toyota Motor Co Ltd |
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