JP3142165B2 - Aqueous chipping resistant paint composition - Google Patents
Aqueous chipping resistant paint compositionInfo
- Publication number
- JP3142165B2 JP3142165B2 JP04017683A JP1768392A JP3142165B2 JP 3142165 B2 JP3142165 B2 JP 3142165B2 JP 04017683 A JP04017683 A JP 04017683A JP 1768392 A JP1768392 A JP 1768392A JP 3142165 B2 JP3142165 B2 JP 3142165B2
- Authority
- JP
- Japan
- Prior art keywords
- chipping
- coating composition
- water
- coating
- aqueous
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車の中塗塗料とし
て使用する水性耐チッピング塗料組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous chipping-resistant coating composition used as an intermediate coating for automobiles.
【０００２】[0002]
【従来の技術】寒冷地では降雪時に交通網を確保するた
め路面に塩化ナトリウム、塩化カルシウム等の塩化物と
砕石からなる凍結防止剤を多量に散布することが一般的
に行われ、自動車等では走行中にはねあげられた砕石に
よりその塗膜が衝撃破損を受け、また高い塩濃度雰囲気
と多湿の両者環境が相俟って損傷発錆に至る機会が他の
地域に比して大きい。従ってかかる地域での自動車用塗
料は、耐衝撃性の高い、いわゆる耐チッピング性に優れ
た、また耐食性の大きい塗料乃至は塗料系であることが
要望されている。2. Description of the Related Art In cold regions, in order to secure a traffic network during snowfall, it is common practice to spray a large amount of a deicing agent consisting of chlorides such as sodium chloride and calcium chloride and crushed stones on road surfaces. During traveling, the crushed stones are subjected to impact damage due to the crushed stones, and the chances of causing rust due to the combination of a high salt concentration atmosphere and a humid environment are greater than in other areas. Accordingly, automotive paints in such regions are required to be paints or paints having high impact resistance, that is, excellent so-called chipping resistance, and high corrosion resistance.
【０００３】通常、自動車塗膜は前処理（化成処理）皮
膜、下塗塗膜（電着プライマー塗膜）、中塗塗膜および
上塗塗膜からなる積層膜で、上記チッピングの損傷を防
止乃至は軽減せしめる目的で中塗塗膜に耐チッピング性
塗料を塗布することが種々試みられている。[0003] Usually, automotive coatings are laminated films consisting of a pre-treatment (chemical conversion) coating, a primer coating (electrodeposited primer coating), an intermediate coating and a top coating, which prevent or reduce the above-mentioned chipping damage. Various attempts have been made to apply a chipping-resistant paint to the intermediate coating film for the purpose of making it.
【０００４】耐チッピング塗料組成物として必要な性質
として、次のようなものが挙げられる。すなわち、衝撃
に対する復元性および皮膜強度を与えるための抗張力と
伸び、カチオン電着塗装膜に対しての接着性が良好であ
ること、厚く塗布できるための良好なチキソトロピー性
を有すること、顔料との混和性が高く、安定性に優れて
いること。また自動車用の中塗塗料としては、塗膜の美
しさや、厚く塗布する場合の軽量性ということも大きな
課題となる。[0004] The properties required for a chipping-resistant coating composition include the following. That is, tensile strength and elongation for giving impact resilience and film strength, good adhesion to the cationic electrodeposition coating film, having good thixotropy for thick coating, pigment High miscibility and excellent stability. In addition, as an intermediate coating for automobiles, the beauty of the coating film and the light weight when the coating is applied thickly are also important issues.
【０００５】従来、このような中塗塗料の主流は、無溶
剤型の塩化ビニルペーストであった。しかし昨今の環境
問題の深刻化の中、塩化ビニル系から次第に非塩化ビニ
ル系の溶剤型塗料へと主流は移っている。Heretofore, the mainstream of such an intermediate coating has been a solventless vinyl chloride paste. However, as environmental problems have become more serious these days, the mainstream has gradually shifted from vinyl chloride paints to non-vinyl chloride solvent paints.
【０００６】[0006]
【従来技術の問題点】非塩化ビニル組成物は従来の塩化
ビニルベースの樹脂に比較して弾性、伸び、強度に劣
る。またさらに作業環境、安全性の観点からは有機溶剤
を使用しない水性の塗料組成物が強く望まれている。2. Description of the Prior Art Non-vinyl chloride compositions are inferior in elasticity, elongation and strength as compared with conventional vinyl chloride-based resins. Further, from the viewpoints of working environment and safety, an aqueous coating composition using no organic solvent is strongly desired.
【０００７】水性の塗料組成物を耐チッピング塗料とし
て使用するためには、ある程度の塗膜の厚みが必要であ
り、このためいわゆるチキソトロピー性が要求される。
良好な水性エマルジョンを得るために高分子分散剤を使
用する場合には流動性がニュートン流れに近くなり、厚
塗りに必要な粘性を得ることが難しい。さらに車両用塗
料としては軽量化を図る必要も生じるが、比重の大きい
耐チッピング剤を含有する塗料を厚塗りした上、軽量化
するのは非常に難しい。[0007] In order to use an aqueous coating composition as a chipping-resistant coating, it is necessary to have a certain thickness of the coating film, so that a so-called thixotropic property is required.
When a polymer dispersant is used to obtain a good aqueous emulsion, the fluidity becomes close to Newtonian flow, and it is difficult to obtain the viscosity necessary for thick coating. Further, it is necessary to reduce the weight of the vehicle paint. However, it is very difficult to reduce the weight by applying a thick coating containing a chipping agent having a large specific gravity.
【０００８】[0008]
【発明が解決しようとする課題】本発明は上記事情に鑑
みなされたものであり、安全で、環境に悪影響を及ぼさ
ない耐チッピング性に優れた水性中塗塗料を提供するこ
とを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water-based intermediate coating composition which is safe, has excellent chipping resistance and does not adversely affect the environment.
【０００９】[0009]
【課題を解決するための手段】すなわち本発明はポリエ
チレン−酢酸ビニル系エマルジョン、ウレタン系エマル
ジョンおよびスチレン−ブタジエン系エマルジョンから
なる群から選択される水性バインダー樹脂、耐チッピン
グ剤、粘性調節剤、顔料および防錆剤を少なくとも含有
する水性耐チッピング塗料組成物に関する。さらに本発
明は、上記水性塗料中に有機カプセルを含有する水性耐
チッピング塗料組成物に関する。That is, the present invention provides an aqueous binder resin selected from the group consisting of a polyethylene-vinyl acetate emulsion, a urethane emulsion and a styrene-butadiene emulsion, an anti-chipping agent, a viscosity modifier, a pigment and The present invention relates to an aqueous chipping-resistant coating composition containing at least a rust inhibitor. Further, the present invention relates to an aqueous chipping-resistant coating composition containing an organic capsule in the above-mentioned aqueous coating.
【００１０】本発明の水性耐チッピング塗料組成物は良
好な抗張力と伸びおよび適度なチキソトロピー性を有
し、顔料との混和性も良く、自動車等の中塗塗料として
塗布すると耐チッピング塗膜として必要な弾性と皮膜強
度を与える。The water-based chipping-resistant coating composition of the present invention has good tensile strength, elongation and moderate thixotropy, and has good miscibility with pigments. Gives elasticity and film strength.
【００１１】本発明の水性耐チッピング塗料組成物は、
ベースレジンとしてポリエチレン−酢酸ビニル系エマル
ジョン、ウレタン系エマルジョンおよびスチレン−ブタ
ジエン系エマルジョンからなる群から選択される１種ま
たは２種以上の混合物を含有する。以上のうちで最も好
ましい樹脂はポリエチレン−酢酸ビニル系エマルジョン
である。The water-based chipping-resistant coating composition of the present invention comprises:
The base resin contains one or a mixture of two or more selected from the group consisting of a polyethylene-vinyl acetate emulsion, a urethane emulsion and a styrene-butadiene emulsion. Among these, the most preferred resin is a polyethylene-vinyl acetate emulsion.
【００１２】本発明の水性耐チッピング塗料組成物に使
用される上記樹脂には耐水性が要求されるため、エチレ
ン比が高いもの、また弾性、抗張力が必要であるため適
度な架橋をしているものが望ましい。The above-mentioned resin used in the water-based chipping-resistant coating composition of the present invention is required to have water resistance, has a high ethylene ratio, and has an appropriate cross-linking because of its elasticity and tensile strength. Things are desirable.
【００１３】このような化合物は、ポリエチレン−酢酸
ビニル系エマルジョンとしては例えば、モビニール（ヘ
キスト合成社製）、ポリゾール（昭和高分子社製）、ス
ミカフレックス（住友化学社製）等が挙げられる。ウレ
タン系エマルジョンは軟質なものが好ましく、例えばハ
イドラン、ボンディック（大日本インキ社製）、サンプ
レン（三洋化成社製）等が好適に用いられる。スチレン
−ブタジエン系エマルジョンとしては適度な弾性を有す
るものであり、例えばトマックスーパー（日本合成社
製）、ラックスター（大日本インキ）等が好適に用いら
れる。Examples of such compounds include polyethylene-vinyl acetate emulsions such as Movinyl (manufactured by Hoechst Gosei Co., Ltd.), Polysol (manufactured by Showa Kogaku Co., Ltd.), and Sumikaflex (manufactured by Sumitomo Chemical Co., Ltd.). The urethane-based emulsion is preferably a soft one, and for example, hydran, bondic (manufactured by Dainippon Ink), samprene (manufactured by Sanyo Chemical) and the like are suitably used. The styrene-butadiene-based emulsion has an appropriate elasticity, and for example, Tomac Super (manufactured by Nippon Gohsei), Luckstar (Dainippon Ink) and the like are preferably used.
【００１４】上記水分散性エマルジョンは通常の方法で
乳化重合されたもので、水の蒸発に伴うエネルギーの減
少のために固形分比率が高く、顔料混和性に富んだ、成
膜性良好なエマルジョンであることが望ましい。本発明
の水性耐チッピング性塗料組成物中、水性バインダー樹
脂は固形分として好ましくは２０〜５０重量％、特に好
ましくは２５〜４０重量％含有する。水性バインダー樹
脂の含量が２０重量％未満の場合は、無機充填剤の接着
不良をお越し、抗張力が低下する。また５０重量％を越
えると、有効な無機充填剤との比率が損なわれ、良好な
クッション性が得られず、耐チッピング性が低下する上
に重量低減の役割を果たさない。The above-mentioned water-dispersible emulsion is emulsion-polymerized by a usual method, and has a high solid content ratio due to a reduction in energy accompanying water evaporation, is rich in pigment miscibility, and has good film-forming properties. It is desirable that In the water-based chipping-resistant coating composition of the present invention, the aqueous binder resin preferably contains 20 to 50% by weight, particularly preferably 25 to 40% by weight as a solid content. When the content of the aqueous binder resin is less than 20% by weight, poor adhesion of the inorganic filler is caused and the tensile strength is reduced. On the other hand, if it exceeds 50% by weight, the ratio with the effective inorganic filler is impaired, so that good cushioning properties cannot be obtained, chipping resistance is reduced, and the weight does not play a role.
【００１５】均一なエマルジョンを得るために、本発明
の塗料組成物は水溶性高分子からなる分散剤を含有す
る。この水溶性高分子はメチルセルロース、ヒドロキシ
プロピルセルロース、ヒドロキシエチルセルロース、カ
ルボキシメチルセルロース、ポリビニルアルコール等が
好適に使用される。水溶性高分子分散剤は本発明の塗料
組成物中、０．０１〜１０重量％含有する。水溶性高分
子分散剤の含量が０．０１重量％未満であるときには、
分散不良をおこし、微視的均一性が損なわれる。また、
１０重量％以上であれば水溶性高分子が水分に対して高
感度であるため、透湿性、透水性が増加し、塗膜の耐水
性が低下する。In order to obtain a uniform emulsion, the coating composition of the present invention contains a dispersant comprising a water-soluble polymer. As the water-soluble polymer, methyl cellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl alcohol and the like are preferably used. The water-soluble polymer dispersant is contained in the coating composition of the present invention in an amount of 0.01 to 10% by weight. When the content of the water-soluble polymer dispersant is less than 0.01% by weight,
Dispersion failure occurs, and microscopic uniformity is impaired. Also,
When the content is 10% by weight or more, the water-soluble polymer has high sensitivity to moisture, so that the moisture permeability and the water permeability increase, and the water resistance of the coating film decreases.
【００１６】本発明の中塗塗料が良好な耐チッピング性
を示すためにはかなり厚く塗布する必要がある。このた
めにはチキソトロピー性が必要であるが、分散剤として
上記のような高分子分散剤を使用する場合には、流動性
がニュートン流れに近くなり、塗料組成物を塗布する場
合にタレ、ナガレによって厚く塗布できなくなる傾向に
ある。そこで本発明の塗料組成物には静置時に水分を保
水し、軽い衝撃を与えると水分を放出する、チキソトロ
ピー性を有する粘性調節剤を含有する。この粘性調節剤
としては無機粉末、特に層状構造を有する粘土類、好ま
しくは粒子径が１〜１００μｍ、特に好ましくは３００
メッシュパス程度（〜７０μｍ以下）のものを用いる。
粒子径が１μｍより小さいと、表面積が大きすぎて部分
的に凝集し、取り扱いにくい。また１００μｍより大き
いと、沈降し、粘度調整の役目を果たさない。In order for the intermediate coating composition of the present invention to exhibit good chipping resistance, it must be applied in a considerably large thickness. For this purpose, thixotropy is required. However, when the above-mentioned polymer dispersant is used as a dispersant, the fluidity becomes close to Newtonian flow, and when applying a coating composition, sagging or Nagare Tends to be too thick to be applied. Therefore, the coating composition of the present invention contains a thixotropic viscosity modifier which retains moisture when allowed to stand and releases moisture when given a slight impact. As the viscosity modifier, inorganic powders, particularly clays having a layered structure, preferably having a particle size of 1 to 100 μm, particularly preferably 300
A mesh pass (up to 70 μm or less) is used.
If the particle diameter is smaller than 1 μm, the surface area is too large to partially coagulate and it is difficult to handle. On the other hand, if it is larger than 100 μm, it sediments and does not play a role in adjusting the viscosity.
【００１７】粘性調節剤としては、ベントナイト、ラポ
ナイト、アタパルガスクレー等が挙げられるが、特に好
ましくはベントナイトおよびラポナイトである。粘性調
節剤は、好ましくは本発明の塗料組成物中に０．１〜１
０重量％含有する。粘性調節剤の含量が０.１重量％未
満の場合には、十分なチキソ性（粘性）が得られない。
また１０重量％を越えると流動性が悪化し、取り扱いに
くい。Examples of the viscosity modifier include bentonite, laponite, attapulgase clay, etc., and particularly preferred are bentonite and laponite. The viscosity modifier is preferably 0.1 to 1 in the coating composition of the present invention.
It contains 0% by weight. If the content of the viscosity modifier is less than 0.1% by weight, sufficient thixotropy (viscosity) cannot be obtained.
On the other hand, if it exceeds 10% by weight, the fluidity deteriorates and it is difficult to handle.
【００１８】塗料組成物に耐チッピング性を付与するた
め、本発明の塗料組成物には耐チッピング剤を含有す
る。本発明においては耐チッピング剤として無機クッシ
ョン剤が好適に使用される。In order to impart chipping resistance to the coating composition, the coating composition of the present invention contains an anti-chipping agent. In the present invention, an inorganic cushioning agent is suitably used as a chipping resistant agent.
【００１９】ここで無機クッション剤とは、塗膜中に充
填されて、砕石による衝撃を吸収する微粒子をいう。本
発明で使用される無機クッション剤は、不定型でエマル
ジョンに均一に分散し、被膜中で適度な硬度を有する粉
体である。この無機クッション剤の粒子径は好ましく１
〜１００μｍ、特に好ましくは５〜５０μｍである。粒
子径が１μｍ以下であるときには良好な耐チッピング性
が出ず、また粒子径が１００μｍを越えると、塗膜にざ
らつきを与え、皮膜の均一性を損なうため好ましくな
い。Here, the inorganic cushioning agent refers to fine particles which are filled in the coating film and absorb the impact of crushed stone. The inorganic cushioning agent used in the present invention is an irregular-shaped powder which is uniformly dispersed in an emulsion and has an appropriate hardness in a film. The particle size of the inorganic cushioning agent is preferably 1
To 100 μm, particularly preferably 5 to 50 μm. When the particle size is 1 μm or less, good chipping resistance is not obtained, and when the particle size exceeds 100 μm, the coating film is rough and the uniformity of the coating film is impaired, which is not preferable.
【００２０】本発明に使用される無機クッション剤とし
ては例えばタルク、クレー、炭酸カルシウム、シリカ、
カオリン、ロウ石、酸化チタン、活性白土、酸性白土等
が挙げられるが、特にタルク、クレー、炭酸カルシウム
が好ましい。Examples of the inorganic cushioning agent used in the present invention include talc, clay, calcium carbonate, silica,
Examples thereof include kaolin, laurite, titanium oxide, activated clay, acid clay, and the like, with talc, clay and calcium carbonate being particularly preferred.
【００２１】本発明の塗料組成物は、上記耐チッピング
剤の少なくとも１種を２０〜８０重量％、特に好ましく
は６５〜５０重量％含有する。耐チッピング剤の含量が
２０重量％未満の場合には、クッション性がなくなり、
良好な耐チッピング性が得られない。また８０重量％を
越えると塗膜の伸びがなくなり、塗膜が損傷しやすくな
ると同時に耐チッピング性もなくなってしまう。The coating composition of the present invention contains at least one of the above-mentioned anti-chipping agents in an amount of 20 to 80% by weight, particularly preferably 65 to 50% by weight. When the content of the chipping-resistant agent is less than 20% by weight, the cushioning property is lost,
Good chipping resistance cannot be obtained. On the other hand, if it exceeds 80% by weight, elongation of the coating film is lost and the coating film is easily damaged, and at the same time, chipping resistance is also lost.
【００２２】本発明の水性耐チッピング塗料組成物に
は、重量を軽減し、より一層の弾性を付与するために、
中空有機カプセルを含有してもよい。この中空有機カプ
セルとしては、すでにカプセル化したものを塗料組成物
中へ混入しても、未発泡のカプセルを塗料組成物中へ混
入し、中塗塗料として塗布したのちに発泡させるもので
あっても、中塗塗料を塗布し、上塗り塗装を終わってか
ら焼き付けを行い発泡させるものであってもよい。The water-based chipping-resistant coating composition of the present invention has the following properties in order to reduce the weight and impart more elasticity.
It may contain hollow organic capsules. As this hollow organic capsule, even if the already encapsulated one is mixed into the coating composition, an unfoamed capsule is mixed into the coating composition and foamed after being applied as an intermediate coating. Alternatively, an intermediate coating may be applied, and after the top coating is completed, baking and foaming may be performed.
【００２３】中空有機カプセルを含有させることによっ
て、中塗層へ弾性を与え、この弾性によってより一層の
耐チッピング性を有するようになる。また中塗り層を厚
くしつつ重量を減らすことができ、車両重量の軽量化に
も役立つ。The inclusion of the hollow organic capsules imparts elasticity to the intermediate coating layer, and the elasticity further enhances chipping resistance. In addition, the weight can be reduced while increasing the thickness of the intermediate coating layer, which is also useful for reducing the weight of the vehicle.
【００２４】カプセルの材質、カプセル化の方法は限定
的ではなく、常套の手段、材質のものが使用できる。例
えば、マツモトマイクロスフェアーＦ等が好適に用いら
れる。The material of the capsule and the method of encapsulation are not limited, and conventional means and materials can be used. For example, Matsumoto Microsphere F is preferably used.
【００２５】発泡済みのカプセルを混入する場合も、未
発泡のカプセルを混入し、後に発泡させる場合であって
も、最終的な塗膜中のカプセルの粒径は１０〜３００μ
ｍ特に５０〜２００μｍとなるものが好ましい。カプセ
ルの粒径が１０μｍ未満の場合には、充分な弾性が得ら
れずマイクロカプセルを混入させる効果が少ない。３０
０μｍを越える場合には、皮膜が不均一であり、塗料組
成物自体も均一とならず、均質な塗膜を生成することが
できない。Regardless of whether a foamed capsule is mixed or an unfoamed capsule is mixed and then foamed later, the final particle size of the capsule in the coating film is 10 to 300 μm.
m, especially those having a thickness of 50 to 200 μm are preferable. When the particle size of the capsule is less than 10 μm, sufficient elasticity cannot be obtained, and the effect of mixing microcapsules is small. 30
If it exceeds 0 μm, the coating is not uniform, the coating composition itself is not uniform, and a uniform coating cannot be formed.
【００２６】本発明の水性耐チッピング塗料組成物中、
この有機中空カプセルは、最終的な空隙部が好ましくは
固形分比で０．０１〜２０％、特に好ましくは、０．１
〜１０％となる範囲で含有する。空隙部が０．０１％未
満である場合には重量軽減の効果が少なく、２０％より
多い場合は皮膜強度が低下するため好ましくない。In the water-based chipping-resistant coating composition of the present invention,
In this organic hollow capsule, the final void portion is preferably 0.01 to 20% in solid content ratio, and particularly preferably 0.1 to 20%.
It is contained in the range of 10% to 10%. When the void portion is less than 0.01%, the effect of weight reduction is small, and when it is more than 20%, the film strength is undesirably reduced.
【００２７】本発明の塗料組成物は、必要に応じて防錆
剤や顔料を適宜含有してもよい。防錆顔料としては、ク
ロム酸金属塩、リン酸金属塩、モリブデン酸金属塩、タ
ングステン酸金属塩およびタンニン酸金属塩からなる群
から選ばれる少なくとも１種を使用すればよい。上記金
属塩の金属としては、周期律表のＩ、II、III、またはI
Ｖ族の金属が好適に用いられる。The coating composition of the present invention may optionally contain a rust inhibitor and a pigment, if necessary. As the rust preventive pigment, at least one selected from the group consisting of metal salts of chromate, metal phosphate, metal molybdate, metal tungstate and metal tannate may be used. Examples of the metal of the metal salt include I, II, III, and I of the periodic table.
Group V metals are preferably used.
【００２８】顔料は、例えばカーボンブラック等の通常
使用されるものであればどのようなものでも使用でき
る。また本発明の塗料組成物には、例えば水溶性ポリア
ミン類を接着性を増加させるために含有させるように、
必要に応じて他の既知の成分を含有させてもよい。As the pigment, any pigment can be used as long as it is a commonly used pigment such as carbon black. Further, in the coating composition of the present invention, for example, to contain a water-soluble polyamines to increase the adhesiveness,
If necessary, other known components may be contained.
【００２９】本発明の塗料組成物は、前処理（化成処
理）皮膜−下塗り（電着塗装）塗膜−中塗塗膜−上塗塗
膜という積層膜の中塗塗膜として塗装する。本発明の塗
料組成物で中塗り塗装する場合、基材鋼板上へ下塗り塗
装としてカチオン電着塗装を行い、そのうえに本発明の
水性耐チッピング塗料組成物をエアーガンでスプレー塗
装し、その後１００〜１７０℃で１０〜６０分間乾燥す
る。乾燥後の膜厚が５００〜１５０μｍとなるようにす
るのが好ましい。The coating composition of the present invention is applied as a middle coat of a laminated film consisting of a pretreatment (chemical conversion treatment) film, an undercoat (electrodeposition coating) film, an intermediate coat film and a topcoat film. In the case of intermediate coating with the coating composition of the present invention, cationic electrodeposition coating is performed as a base coat on a base steel sheet, and then the aqueous chipping-resistant coating composition of the present invention is spray-coated with an air gun, and then 100 to 170 ° C. For 10 to 60 minutes. It is preferable that the film thickness after drying is 500 to 150 μm.
【００３０】本発明の水性耐チッピング塗料組成物を、
以下実施例を用いててさらに詳細に説明する。The aqueous chipping-resistant coating composition of the present invention is
Hereinafter, the present invention will be described in more detail with reference to examples.
【実施例】水性塗料組成物の作成 以下の処方で水性塗料を作成し、粘度、抗張力および伸
びを測定した。EXAMPLES Preparation of water-based coating composition A water-based coating was prepared according to the following formulation, and the viscosity, tensile strength and elongation were measured.
【００３１】実施例１ Embodiment 1
【００３２】実施例２ Embodiment 2
【００３３】実施例３ 比較例１ Embodiment 3 Comparative Example 1
【００３４】塗料組成物の物性評価 実施例１、２および比較例１の塗料組成物の粘度、抗張
力および伸びを以下の方法で測定した。 粘度：ブルックフィールド粘度計を用いて、２０℃、６
rpmで測定した。 抗張力、伸び：テンシロンＵＴＭ型（オリエツテック社
製）で測定した。 結果を表１にす。 Evaluation of Physical Properties of Coating Composition The viscosity, tensile strength and elongation of the coating compositions of Examples 1 and 2 and Comparative Example 1 were measured by the following methods. Viscosity: 20 ° C., 6 using a Brookfield viscometer.
Measured at rpm. Tensile strength and elongation: Measured with a Tensilon UTM type (manufactured by ORIET TECH). The results are shown in Table 1.
【００３５】[0035]
【表１】 [Table 1]
【００３６】上記実施例１〜３および比較例１の塗料組
成物を自動車用鋼板へ中塗り塗料として塗装し、塗膜性
能、タレ性および耐チッピング性を試験した。The coating compositions of Examples 1 to 3 and Comparative Example 1 were applied to an automotive steel plate as an intermediate coating, and the coating film performance, sagging property and chipping resistance were tested.
【００３７】塗装 厚さ０．８ｍｍの自動車用冷延鋼板にカチオン電着プラ
イマーを塗装した後、試験塗料組成物を乾燥膜厚５００
μｍとなるようにエアスプレー塗装した。８０℃×３０
分、続いて１２０℃×３０分の乾燥後、熱硬化型アクリ
ル樹脂クリヤー塗料を、硬化後の膜厚が３０〜３５μｍ
となるようにエアスプレー塗装した。塗装後、室温×１
０分、１５０℃×３０分加熱硬化させて試験片とした。After a cationic electrodeposition primer was applied to a cold-rolled steel sheet having a coating thickness of 0.8 mm, the test coating composition was dried to a film thickness of 500 mm.
It was air-sprayed to a thickness of μm. 80 ℃ × 30
After drying for 120 minutes at 120 ° C. for 30 minutes, the thermosetting acrylic resin clear paint is cured to a thickness of 30 to 35 μm.
It was air spray painted so that After painting, room temperature x 1
The sample was cured by heating for 30 minutes at 150 ° C. for 30 minutes.
【００３８】塗膜性能試験（デュポン衝撃試験） ＪＩＳ Ｋ ５４００，６，１３．３に従い、半径６.３
５ｍｍの撃ち台と受け台を取り付け、試験片を置き、５
００ｇのおもりの落下高さにより塗面に損傷が生じた高
さを測定した。 Film performance test (DuPont impact test) Radius 6.3 according to JIS K 5400,6,13.3
Attach a shooting table and pedestal of 5 mm, place the test piece, and
The height at which the coated surface was damaged by the falling height of the 00 g weight was measured.
【００３９】評価 以下のごとくランク付した； ○：４０ｃｍ以上、△：２０〜４０ｃｍ、×：２０ｃｍ
未満 結果を表２に示す。 Evaluation : Ranks were as follows: ○: 40 cm or more, Δ: 20 to 40 cm, ×: 20 cm
The results are shown in Table 2.
【００４０】タレ性 試験用鋼板の下部をテープでマスキングし、実施例１〜
３および比較例１の中塗り塗料を塗工後一定時間垂直に
放置した。その後焼き付けを行い、マスキング部への塗
膜のタレの有無を調べた。The lower part of the steel plate for sagging test was masked with a tape.
3 and Comparative Example 1 were left to stand vertically for a certain time after coating. Thereafter, baking was performed, and the presence or absence of sagging of the coating film on the masking portion was examined.
【００４１】評価 以下のごとくランク付した； ○：タレの無いもの、 ×：タレのあるもの 結果を表２に示す。 Evaluation : The results were ranked as follows: ：: No sagging, ×: Sagging The results are shown in Table 2.
【００４２】耐チッピング性試験 スガ試験機社製グラベロメーターを用い、７号砕石(JIS
A5001-1977)２５０ｇを５ｋｇ／ｃｍ2圧、試験片１０
０×１５０×０．８ｍｍで９０°の角度、−１５℃の条
件で各試験片の耐チッピング性を調べたところ、１ｍｍ
以上の剥離傷は認められなかった。この試験片にソルト
スプレーを施して１２０時間後の錆発生率を調べ、耐チ
ッピング性の指標とした。 Chipping resistance test A No. 7 crushed stone (JIS
A5001-1977) 250 g, 5 kg / cm 2 pressure, test piece 10
When the chipping resistance of each test piece was examined under the conditions of 0 × 150 × 0.8 mm, an angle of 90 °, and −15 ° C., 1 mm
The above peeling scratch was not recognized. This test piece was subjected to salt spraying, and the rust generation rate after 120 hours was examined, which was used as an index of chipping resistance.
【００４３】評価 以下のごとくランク付した； ○：錆発生５％未満、△：錆発生５〜１０％、×：錆発
生１０％以上 結果を表２に示す。 Evaluation : Ranks were given as follows: ：: less than 5% of rust, Δ: 5 to 10% of rust, ×: 10% or more of rust The results are shown in Table 2.
【００４４】[0044]
【表２】 [Table 2]
【００４５】[0045]
【発明の効果】本発明によって安全で、環境に悪影響を
及ぼさない耐チッピング性に優れた水性中塗塗料を得る
ことができる。According to the present invention, it is possible to obtain a water-based intermediate coating which is safe and has excellent chipping resistance which does not adversely affect the environment.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０９Ｄ 131/04 Ｃ０９Ｄ 131/04 175/04 175/04 (56)参考文献 特開 平５−31457（ＪＰ，Ａ) 特開 平２−303573（ＪＰ，Ａ) 特開 昭62−141072（ＪＰ，Ａ) 特開 平４−53878（ＪＰ，Ａ) 特開 昭64−81864（ＪＰ，Ａ) 特開 昭64−85260（ＪＰ，Ａ) 特開 昭56−167764（ＪＰ，Ａ) 特開 昭62−260867（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C09D 5/02 ──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. 7 Identification symbol FI C09D 131/04 C09D 131/04 175/04 175/04 (56) References JP-A-5-31457 (JP, A) JP JP-A-2-303573 (JP, A) JP-A-62-141072 (JP, A) JP-A-4-53878 (JP, A) JP-A 64-81864 (JP, A) JP-A 64-85260 (JP) , A) JP-A-56-166774 (JP, A) JP-A-62-260867 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C09D 5/02
Claims (4)
ン、ウレタン系エマルジョンおよびスチレン−ブタジエ
ン系エマルジョンからなる群から選択される水性バイン
ダー樹脂、無機クッション剤からなる耐チッピング剤お
よび粘性調節剤を少なくとも含有する水性耐チッピング
塗料組成物。An aqueous binder resin containing at least an aqueous binder resin selected from the group consisting of a polyethylene-vinyl acetate emulsion, a urethane emulsion and a styrene-butadiene emulsion, a chipping agent comprising an inorganic cushioning agent and a viscosity modifier. Chipping paint composition.
軽い衝撃を与えると水分を放出する水分散性無機充填剤
である請求項１に記載した水性耐チッピング塗料組成
物。2. The method according to claim 1, wherein the viscosity controlling agent retains water when left standing.
The water-based chipping-resistant coating composition according to claim 1, which is a water-dispersible inorganic filler which releases moisture when given a slight impact.
項１に記載した水性耐チッピング塗料組成物。3. The water-based chipping-resistant coating composition according to claim 1, further comprising a hollow organic capsule.
した後に発泡焼き付けによってカプセルとなる未発泡の
有機ビーズである請求項３に記載した水性耐チッピング
塗料組成物。4. The aqueous chipping-resistant coating composition according to claim 3, wherein the hollow organic capsules are unfoamed organic beads which become capsules by foam baking after application of the coating composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04017683A JP3142165B2 (en) | 1992-02-03 | 1992-02-03 | Aqueous chipping resistant paint composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04017683A JP3142165B2 (en) | 1992-02-03 | 1992-02-03 | Aqueous chipping resistant paint composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05214269A JPH05214269A (en) | 1993-08-24 |
| JP3142165B2 true JP3142165B2 (en) | 2001-03-07 |
Family
ID=11950638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04017683A Expired - Fee Related JP3142165B2 (en) | 1992-02-03 | 1992-02-03 | Aqueous chipping resistant paint composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3142165B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5356683A (en) * | 1993-10-28 | 1994-10-18 | Rohm And Haas Company | Expandable coating composition |
| JP3694032B2 (en) * | 1996-06-19 | 2005-09-14 | 松本油脂製薬株式会社 | Chipping resistant paint |
| US7270869B2 (en) | 2003-07-25 | 2007-09-18 | Fujifilm Corporation | Image-recording material, process for producing the same and process for forming image |
| JP2005220255A (en) * | 2004-02-06 | 2005-08-18 | Asahi Denka Kogyo Kk | Water-dispersing type polyurethane composition |
-
1992
- 1992-02-03 JP JP04017683A patent/JP3142165B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05214269A (en) | 1993-08-24 |
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