JP2002038130A - Water-based resin composition for sealer - Google Patents
Water-based resin composition for sealerInfo
- Publication number
- JP2002038130A JP2002038130A JP2001137223A JP2001137223A JP2002038130A JP 2002038130 A JP2002038130 A JP 2002038130A JP 2001137223 A JP2001137223 A JP 2001137223A JP 2001137223 A JP2001137223 A JP 2001137223A JP 2002038130 A JP2002038130 A JP 2002038130A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- aqueous
- resin composition
- sealer
- resin
- 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
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、裸鋼板や亜鉛やアルミ
ニウム等の金属被膜を有する鋼板の防水、防塵、防錆等
に用いられる樹脂組成物に関し、さらに詳しくは、特に
自動車ボディ等の鋼板接合部の間隙を充填したりヘミン
グシーラとして好適なシーラー用水性樹脂組成物に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition used for waterproofing, dustproofing, rustproofing, etc. of a bare steel sheet or a steel sheet having a metal coating such as zinc or aluminum. The present invention relates to an aqueous resin composition for a sealer, which is suitable for filling a gap between joints or as a hemming sealer.
【０００２】[0002]
【従来の技術】自動車、建材、家電器具などには亜鉛や
アルミニウムやこれらを含む合金からなるメッキ層を有
する鋼板が良く用いられている。2. Description of the Related Art Steel sheets having a plating layer made of zinc, aluminum or an alloy containing them are often used in automobiles, building materials, home appliances, and the like.
【０００３】ところで、このようなメッキ鋼板を用いた
場合、その鋼板接合部の間隙や折り曲げ部等には、水や
埃・塵が溜まり易くこれらが錆の原因となる。[0003] When such a plated steel sheet is used, water, dust, and dust easily accumulate in gaps and bent portions of the steel sheet joints, which cause rust.
【０００４】これを防ぐため、例えば自動車ボディの場
合、その鋼板接合部の間隙には、防水・防塵処理のため
にいゆるボディシーラーといわれる樹脂組成物が充填さ
れている。このボディシーラー用の樹脂組成物として
は、ポリ塩化ビニル系樹脂を主成分とするものが広く用
いられている（特願平４−８０３８２号、特願平７−３
４５４８３号等参照）。In order to prevent this, for example, in the case of an automobile body, the gap between the steel plate joints is filled with a resin composition called a so-called body sealer for waterproofing and dustproofing. As the resin composition for the body sealer, those containing a polyvinyl chloride resin as a main component are widely used (Japanese Patent Application Nos. 4-80382 and 7-3).
No. 45483).
【０００５】しかし、近年の環境問題から、塩素や可塑
剤を含有するポリ塩化ビニル系樹脂に代わる樹脂が求め
られ、また、作業環境の改善等の点から有機溶剤を含ま
ない樹脂組成物が求められている。[0005] However, due to recent environmental problems, there is a need for a resin that can replace the polyvinyl chloride resin containing chlorine or a plasticizer, and a resin composition containing no organic solvent is required from the viewpoint of improving the working environment. Have been.
【０００６】なお、このような有機溶剤を含まない樹脂
組成物としては水性エマルジョンタイプのものが知られ
ている。しかしながら、このような水性エマルジョン樹
脂組成物の大部分は、紙やフィルムにコーティングされ
て使用されているものであり、この場合、塗工性を確保
するために水分散時の粘度を低くしていることが多く、
シーラーとしては全く適さないものである。[0006] As such a resin composition containing no organic solvent, an aqueous emulsion type is known. However, most of such aqueous emulsion resin compositions are used after being coated on paper or film.In this case, the viscosity at the time of dispersion in water is reduced to ensure coatability. Are often
It is completely unsuitable as a sealer.
【０００７】一方、耐白錆性に優れた表面処理鋼板が提
案されている（特開２０００−０００５１９参照）。同
公報に記載の表面処理は、亜鉛系又はアルミニウム系メ
ッキ鋼板の表面に、水分散性樹脂及び／又は水溶性樹脂
と、高分子マトリックスにキレート形成基を有する高分
子キレート化剤とを主成分として保護皮膜を形成してな
るもので、保護皮膜中のキレート形成基がメッキ皮膜の
表面に吸着することで緻密な保護皮膜層を形成すること
によるものである。On the other hand, a surface-treated steel sheet having excellent white rust resistance has been proposed (see JP-A-2000-000519). The surface treatment described in the publication comprises, on the surface of a zinc-based or aluminum-based plated steel sheet, a water-dispersible resin and / or a water-soluble resin, and a polymer chelating agent having a chelating group in a polymer matrix. This is because a dense protective film layer is formed by the chelate-forming groups in the protective film adsorbing to the surface of the plating film.
【０００８】しかしながら、上記の表面処理は、単なる
緻密な保護皮膜層の形成であり、この保護皮膜層により
被覆されない部分には防錆は期待できないものである。However, the above-mentioned surface treatment is merely a formation of a dense protective film layer, and rust prevention cannot be expected in a portion not covered by this protective film layer.
【０００９】[0009]
【発明が解決しようとする課題】一般に、シーラー用の
樹脂組成物として環境負荷を小さくするために、有機溶
媒を用いないで水性媒体に分散させた水性樹脂組成物を
用いることは当然思いつくことであるが、従来から知ら
れている水性樹脂組成物では粘度が非常に低くシーラー
としての適性を有するものではない。In general, it is naturally possible to use an aqueous resin composition dispersed in an aqueous medium without using an organic solvent in order to reduce the environmental load as a resin composition for a sealer. However, conventionally known aqueous resin compositions have very low viscosity and do not have suitability as sealers.
【００１０】一方、シーラーには、厚みのある塗り方が
できる粘性とシール対象の部材との密着性が良好である
ことが要求されるが、水性樹脂組成物はそもそも含水物
であるためにこのような要求される性質とは逆の性質を
本来有している。さらにシール対象が鋼板の場合、通常
鋼板の表面には油膜が存在しているので密着性の点では
ますます不利である。本発明者らは以上の点を改良すべ
く鋭意研究し、本発明を完成させるに至った。On the other hand, a sealer is required to have good viscosity to form a thick coating and good adhesion to a member to be sealed. However, since an aqueous resin composition is a hydrated material in the first place, it is necessary to use such a sealer. It originally has the opposite property to the required property. Furthermore, when the object to be sealed is a steel plate, an oil film is usually present on the surface of the steel plate, and thus it is more disadvantageous in terms of adhesion. The present inventors have intensively studied to improve the above points and completed the present invention.
【００１１】本発明は、塩素及び有機溶剤を含まなくて
環境に悪影響を与えず、かつ、防水・防塵に留まらず積
極的な防錆能を有するシーラー用樹脂組成物であって、
自動車ボディを始め建材、家電器具等に用いられる鋼板
の防水・防錆用に好適なシーラー用水性樹脂組成物を提
供するにある。[0011] The present invention is a resin composition for a sealer which does not have an adverse effect on the environment because it does not contain chlorine and an organic solvent, and has not only waterproof and dustproof properties but also a positive rustproofing property,
It is an object of the present invention to provide an aqueous resin composition for a sealer suitable for waterproofing and rustproofing of a steel sheet used for an automobile body, a building material, a home appliance, and the like.
【００１２】[0012]
【課題を解決するための手段】かくして本願『請求項
１』に係る発明によれば、『鋼板の防水・防錆等に用い
られ、水性樹脂を主成分として粘度調整剤により粘度が
５,０００〜１００,０００mPa・sに調整されたシーラー
用樹脂組成物からなり、上記水性樹脂は、樹脂固形分２
０〜４０重量％の水分散状態で１０００mＰa・s以上の
粘度を有しかつ構成元素として塩素を含まないポリオレ
フィンからなる水性エマルジョンポリオレフィン樹脂で
あるシーラー用水性樹脂組成物』が提供される。Thus, according to the invention of claim 1 of the present application, "a water-based resin is used as a main component and has a viscosity of 5,000 using a viscosity modifier with a water-based resin as a main component. A resin composition for a sealer adjusted to 100,000 mPa · s.
An aqueous emulsion polyolefin resin comprising a polyolefin having a viscosity of 1000 mPa · s or more in a water-dispersed state of 0 to 40% by weight and containing no chlorine as a constituent element ”.
【００１３】また、本願『請求項２』に係る発明は、上
記請求項１の構成に、さらに『水溶性マグネシウム化合
物を、０．１〜１０重量％の割合で添加したシーラー用
水性樹脂組成物』を提供する。[0013] The invention according to claim 2 of the present application is directed to an aqueous resin composition for a sealer in which a water-soluble magnesium compound is further added to the composition of claim 1 in a ratio of 0.1 to 10% by weight. "I will provide a.
【００１４】本願『請求項１』に係るシーラー用水性樹
脂組成物によれば、主成分が樹脂固形分２０〜４０重量
％の水分散状態で１０００mＰa・s以上の粘度を有しか
つ構成元素として塩素を含まないポリオレフィンからな
る水性エマルジョンポリオレフィン樹脂からなると共
に、粘度調整剤により全体の粘度範囲が５,０００〜１
００,０００mPa・sに調整されているので、シーラとし
ての適正粘度や耐熱性、耐久性、強度を有すると共に、
塩素及び有機溶剤を含まなく従って製造時、塗工時、廃
棄時等のいずれにおいても有害物質を放出しなく、環境
汚染等の問題も生ずることはない。According to the aqueous resin composition for a sealer according to claim 1 of the present application, the main component has a viscosity of 1000 mPa · s or more in a water-dispersed state having a resin solid content of 20 to 40% by weight, and as a constituent element A water-based emulsion polyolefin resin comprising a chlorine-free polyolefin, and the entire viscosity range is 5,000 to 1 by a viscosity modifier.
Since it is adjusted to 00000 mPas, it has appropriate viscosity, heat resistance, durability and strength as a sealer,
Since it does not contain chlorine and organic solvents, it does not emit harmful substances during production, coating, disposal, etc., and does not cause problems such as environmental pollution.
【００１５】本願『請求項２』に係るシーラー用水性樹
脂組成物によれば、上記請求項１と同様の作用に加え、
水溶性マグネシウム化合物が添加されているので、亜鉛
系メッキ鋼板の耐食性に非常に優れるものとなる。According to the aqueous resin composition for a sealer according to claim 2 of the present application, in addition to the same effects as in claim 1 above,
Since the water-soluble magnesium compound is added, the galvanized steel sheet has extremely excellent corrosion resistance.
【００１６】[0016]
【発明の実施の形態】本願発明のシーラー用水性樹脂組
成物は、粘度が５,０００〜１００,０００mPa・sの範囲
に調整される。１００,０００mPa・sを越えると塗工性
が悪くなり、また５,０００mPa・sよりも小さいと鋼板
面に油が付着している場合において定着せずに流れ落ち
てしまう事もある。BEST MODE FOR CARRYING OUT THE INVENTION The aqueous resin composition for a sealer of the present invention is adjusted to have a viscosity of 5,000 to 100,000 mPa · s. If it exceeds 100,000 mPa · s, the coatability will be poor, and if it is less than 5,000 mPa · s, the oil may adhere to the steel plate surface and run off without fixing.
【００１７】本願発明のシーラー用水性樹脂組成物にお
いて、主成分として用いられる水性エマルジョンポリオ
レフィン樹脂は、粒径数μｍ程度の微粒子状ポリオレフ
ィンを水に分散したものが好適に用いられる。In the aqueous resin composition for a sealer of the present invention, the aqueous emulsion polyolefin resin used as a main component is preferably a fine particle polyolefin having a particle size of about several μm dispersed in water.
【００１８】上記水性エマルジョンポリオレフィン樹脂
は、樹脂固形分２０〜４０重量％の状態で常温の粘度が
１０００mＰa・s以上であるものが用いられる。上記樹脂
固形分が２０重量％よりも少ない場合は所定の粘度に達
せず、シーラーとして鋼板接合部や折り曲げ部の間隙等
を充填することができず不適であり、上記樹脂固形分が
４０重量％よりも多い場合は、粘度が高すぎて塗工性が
不十分となる点で好ましくない。As the aqueous emulsion polyolefin resin, a resin having a viscosity at room temperature of 1000 mPa · s or more at a resin solid content of 20 to 40% by weight is used. When the resin solid content is less than 20% by weight, the viscosity does not reach the predetermined value, and the sealer cannot be filled in the gap between the steel plate joint and the bent portion. If it is more than this, the viscosity is too high and the coating properties become insufficient, which is not preferable.
【００１９】なお、上記水性エマルジョンポリオレフィ
ン樹脂の粘度は、１００００mＰa・s程度が実用的なもの
として挙げられるが、粘度の上限は別段限定されるもの
ではない。The viscosity of the aqueous emulsion polyolefin resin is practically about 10,000 mPa · s, but the upper limit of the viscosity is not particularly limited.
【００２０】さらに、上記水性エマルジョンポリオレフ
ィン樹脂は、その構成元素に塩素を含まないものが選択
される。Further, the aqueous emulsion polyolefin resin is selected from those containing no chlorine as a constituent element.
【００２１】上記水性エマルジョンポリオレフィン樹脂
を構成する上記ポリオレフィン樹脂としては、例えば酢
酸ビニル系の一般的なポリオレフィンや他のモノマとの
共重合体、アイオノマ、変性アイオノマ等が含まれ、用
途によって上記の範囲で粘度、接着性を変化させる場合
にこれらの樹脂が適宜選択して用いられる。The above-mentioned polyolefin resin constituting the aqueous emulsion polyolefin resin includes, for example, general vinyl acetate-based polyolefins, copolymers with other monomers, ionomers, modified ionomers and the like. These resins are appropriately selected and used when the viscosity and the adhesiveness are changed.
【００２２】上記所定の範囲の樹脂固形分及び粘度を有
する水性エマルジョンポリオレフィン樹脂としては、例
えば、「ケミパールＳ１００」「ケミパールＶ２００」
〔いずれも登録商標、三井化学（株）製）〕の名で入手
可能であるが、別段これに限定されるものでもない。Examples of the aqueous emulsion polyolefin resin having a resin solid content and a viscosity within the above-mentioned predetermined range include, for example, "Chemipearl S100" and "Chemipearl V200".
[All are registered trademarks, manufactured by Mitsui Chemicals, Inc.]], but are not particularly limited thereto.
【００２３】本願発明に用いられる粘度調整剤として
は、本願『請求項３』に示すように、無機系充填剤、有
機系増粘剤又はこれらの混合物が適宜用いられる。As the viscosity modifier used in the present invention, an inorganic filler, an organic thickener or a mixture thereof is appropriately used, as described in claim 3 of the present application.
【００２４】上記無機系充填剤としては、当然、その構
成元素に塩素を含まないものが選択され、一般的にシー
ラーに使用される炭酸カルシウム、ケイ酸カルシウム、
ベントナイト、ゼオライト、タルク、ガラスビーズ、表
面改質チタニア等の無機化合物、金属粉、又は有機処理
フィラー等を求める目的に応じて用いる事ができる。こ
れらのうち、改質炭酸カルシウム及び改質チタニアが好
適に用いられるが、別段これに限定されない。As the above-mentioned inorganic filler, naturally, those containing no chlorine in its constituent elements are selected, and calcium carbonate, calcium silicate, and the like generally used in sealers are used.
Inorganic compounds such as bentonite, zeolite, talc, glass beads, surface-modified titania, metal powder, and organically-treated fillers can be used according to the purpose. Of these, modified calcium carbonate and modified titania are preferably used, but are not particularly limited thereto.
【００２５】なお、上記無機系充填剤は、微粉末であっ
たり強塩基性であるものは、樹脂や後述する水溶性マグ
ネシム化合物と急激な反応を生ずる場合があるので、若
干注意を要する。It should be noted that the inorganic filler, which is a fine powder or a strongly basic one, may cause a rapid reaction with a resin or a water-soluble magnesium compound described below, so that some care is required.
【００２６】上記有機系増粘剤としては、当然、その構
成元素に塩素を含まないものが選択され、一般的に増粘
剤として知られている公知のものを用いることができ、
例えば、ポリエチレングリコール（ＰＥＧ）、カルボキ
シメチルセルロース（ＣＭＣ）、ヒドロキシメチルセル
ロース（ＨＭＣ）、セルロースパウダー、アルギン酸ソ
ーダ等が好適なものとして挙げられるが、別段これらに
限定されない。As the above-mentioned organic thickener, naturally, those containing no chlorine in the constituent elements thereof can be selected, and known ones generally known as thickeners can be used.
For example, polyethylene glycol (PEG), carboxymethylcellulose (CMC), hydroxymethylcellulose (HMC), cellulose powder, sodium alginate and the like are preferable, but not particularly limited thereto.
【００２７】本願『請求項２』に係る発明において、水
溶性マグネシウム化合物の添加は、亜鉛系メッキ鋼板等
に対する防食性・耐食性をより良好にする点で好ましい
ものである。In the invention according to claim 2 of the present application, the addition of a water-soluble magnesium compound is preferable in that corrosion resistance and corrosion resistance to a zinc-based plated steel sheet and the like are further improved.
【００２８】上記水溶性マグネシウム化合物は、シーラ
ー用水性樹脂組成物において、０．１〜１０重量％の範
囲で用いられる。上記0.1重量％よりも少ない場合は所
期の耐食効果が得られなく、上記１０重量％を越えて添
加すると或る程度以上には耐食効果が伸びず無駄である
と共に樹脂強度の点や組成物の安定性の点で好ましくな
い。The water-soluble magnesium compound is used in an amount of 0.1 to 10% by weight in the aqueous resin composition for a sealer. If the amount is less than 0.1% by weight, the desired anti-corrosion effect cannot be obtained. If the amount exceeds 10% by weight, the anti-corrosion effect does not extend to a certain degree or more and is wasteful. Is not preferred in terms of stability.
【００２９】上記水溶性マグネシウム化合物としては、
炭酸マグネシウム、リン酸マグネシウム、リン酸水素マ
グネシウム、リン酸二水素マグネシウム等が挙げられ、
リン酸二水素マグネシウムが、耐食性及び水溶性に優れ
る点から好ましいが、別段これに限定されるものでもな
い。The water-soluble magnesium compound includes:
Magnesium carbonate, magnesium phosphate, magnesium hydrogen phosphate, magnesium dihydrogen phosphate and the like,
Magnesium dihydrogen phosphate is preferred from the viewpoint of excellent corrosion resistance and water solubility, but is not particularly limited thereto.
【００３０】上記本願シーラー用水性樹脂組成物におい
て、例えば鋼板への密着性を良好にする点から、本願
『請求項４』に示すように、水性密着性樹脂が主成分の
水性樹脂に添加されて良い。この場合、本発明の組成物
中における全水性樹脂の固形分比率は一定に保持したま
まで添加される。換言すれば、水性密着性樹脂と水性エ
マルジョンポリオレフィン樹脂との固形分合計が本発明
組成物中の水性樹脂の固形分割合となるように添加され
る。In the above-mentioned aqueous resin composition for a sealer of the present invention, an aqueous adhesive resin is added to the aqueous resin as a main component as described in claim 4 of the present application in order to improve the adhesiveness to a steel plate, for example. Good. In this case, the solid content ratio of the total aqueous resin in the composition of the present invention is added while being kept constant. In other words, it is added so that the total solid content of the aqueous adhesive resin and the aqueous emulsion polyolefin resin becomes the solid content ratio of the aqueous resin in the composition of the present invention.
【００３１】上記密着性樹脂としては、本願『請求項
５』に示す『水性ウレタン樹脂』や、本願『請求項６』
に示す『水性エポキシ樹脂』や、本願『請求項７』に示
す『水性ウレタン樹脂と水性エポキシ樹脂との混合物』
等が挙げられる。Examples of the adhesive resin include “aqueous urethane resin” described in claim 5 of the present application and claim 6 of the present application.
"Aqueous epoxy resin" and "A mixture of an aqueous urethane resin and an aqueous epoxy resin" described in claim 7 of the present application.
And the like.
【００３２】上記水性ウレタン樹脂は、ポリイソシアネ
ートとポリオール等との活性水素含有化合物の反応物を
水性分散体化したものの総称を意味し、ポリヒドロキシ
カルボン酸、アミノスルホン酸塩をイソシアネート基に
付加させたアニオン型水性化ウレタン樹脂及びカチオン
型、ノニオン型等が一般的であり、更に、乳化型並びに
アクリル、エポキシ、アルキッドで変性したものも含ま
れる。The above-mentioned aqueous urethane resin is a general term for an aqueous dispersion of a reaction product of an active hydrogen-containing compound such as a polyisocyanate and a polyol, and is obtained by adding a polyhydroxycarboxylic acid or an aminosulfonic acid salt to an isocyanate group. Anion-type aqueous urethane resin, cationic type, nonionic type and the like are generally used, and further include emulsified type and those modified with acrylic, epoxy and alkyd.
【００３３】上記水性エポキシ樹脂としては、カルボキ
シル基を導入して水溶性化したものが一般的であり、更
にアクリル系樹脂を結合させてより高機能化したもの等
も含まれる。The water-based epoxy resin is generally a water-soluble one obtained by introducing a carboxyl group, and further includes a resin having a higher functionality by bonding an acrylic resin.
【００３４】上記水性ウレタン樹脂又は水性エポキシ樹
脂をそれぞれ単独で添加する場合、本願『請求項５』又
は『請求項６』に示すように、前記水性エマルジョンポ
リオレフィン樹脂３０〜７０重量％に対して、それぞれ
３０〜７０重量％の割合（固形分比率）で配合される。When the aqueous urethane resin or the aqueous epoxy resin is added alone, as described in claim 5 or claim 6 of the present application, based on 30 to 70% by weight of the aqueous emulsion polyolefin resin, Each is blended at a ratio of 30 to 70% by weight (solid content ratio).
【００３５】また、水性ウレタン樹脂と水性エポキシ樹
脂とを混合して添加するときは、本願『請求項７』に示
すように、水性ウレタン樹脂：水性エポキシ樹脂＝１：
４〜４：１（重量比）の割合で混合される。When the water-based urethane resin and the water-based epoxy resin are mixed and added, as described in claim 7 of the present application, water-based urethane resin: water-based epoxy resin = 1:
They are mixed at a ratio of 4 to 4: 1 (weight ratio).
【００３６】上記水性密着性樹脂の混合において、この
樹脂の配合割合が３０重量％に満たない場合は密着性が
稼げず、７０重量％を越えるときは樹脂の弾性及び耐衝
撃性の点で好ましくない。In the mixing of the above-mentioned water-based adhesive resin, if the compounding ratio of the resin is less than 30% by weight, adhesion cannot be obtained, and if it exceeds 70% by weight, it is preferable in view of the elasticity and impact resistance of the resin. Absent.
【００３７】なお、本願各発明のシーラー用水性樹脂組
成物において、顔料や酸化防止剤、抗菌剤、防かび剤、
消泡剤等公知の添加物が任意に用いられてよい。In the aqueous resin composition for a sealer according to the present invention, pigments, antioxidants, antibacterial agents, fungicides,
Known additives such as an antifoaming agent may be optionally used.
【００３８】[0038]
【実施例】以下、実施例により本発明を詳細に説明する
が、これにより本発明は限定されるものではない。EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited by these examples.
【００３９】まず、水溶性マグネシウム化合物を添加し
ない本願発明（以下、本願第１発明という）のうち、無
機系充填剤を用いたものを実施例１〜９に示し、比較例
と共に説明する。First, among the inventions of the present application to which no water-soluble magnesium compound is added (hereinafter referred to as the first invention of the present application), those using an inorganic filler are shown in Examples 1 to 9 and will be described together with Comparative Examples.
【００４０】［実施例１］樹脂固形分２５％で、粘度が
３０００〜５０００mＰa・sの水性エマルジョンポリオレ
フィン樹脂〔三井化学（株）製ケミパールＳ１００アイ
オノマータイプ〕（以下、このタイプを“水性樹脂Ａ”
と表示する。）及び無機系充填剤として炭酸カルシウム
〔詳しくは改質炭酸カルシウム（白石工業株式会社製）
であるが、以下単に炭酸カルシウムと略す〕を、それぞ
れ固形分比で７０重量％及び３０重量％の割合で混合し
て、全体の粘度が約６，０００mPa・sとなるように調整し
た本発明のシーラー用水性樹脂組成物（No.1）を得た。Example 1 Aqueous emulsion polyolefin resin having a resin solids content of 25% and a viscosity of 3000 to 5000 mPa · s [Chemipearl S100 ionomer type manufactured by Mitsui Chemicals, Inc.] (hereinafter referred to as “aqueous resin A”)
Is displayed. ) And calcium carbonate as an inorganic filler [Specifically, modified calcium carbonate (manufactured by Shiraishi Industry Co., Ltd.)
However, it is simply referred to as calcium carbonate hereinafter) at a solid content ratio of 70% by weight and 30% by weight, respectively, to adjust the total viscosity to about 6,000 mPa · s. Thus, an aqueous resin composition for sealers (No. 1) was obtained.
【００４１】［実施例２］樹脂固形分２５％で、粘度が
８０００〜１２０００mＰa・sの水性エマルジョンポリオ
レフィン樹脂〔三井化学（株）製ケミパールＶ2００酢
酸ビニル系共重合タイプ〕（以下、このタイプを“水性
樹脂Ｂ”と表示する。）、無機系充填剤として炭酸カル
シウム、及び、顔料としてチタン白を、それぞれ固形分
比で６０重量％、３９重量％、及び、１重量％の割合で
混合して、全体の粘度が約７，０００mPa・sとなるよう
に調整した本発明のシーラー用水性樹脂組成物（No.2）
を得た。Example 2 Aqueous emulsion polyolefin resin having a resin solid content of 25% and a viscosity of 8000 to 12000 mPa · s [Chemipearl V200 vinyl acetate copolymer type manufactured by Mitsui Chemicals, Inc.] Aqueous resin B ″), calcium carbonate as an inorganic filler, and titanium white as a pigment were mixed at a solid content ratio of 60% by weight, 39% by weight, and 1% by weight, respectively. And the aqueous resin composition for a sealer of the present invention adjusted to have a total viscosity of about 7,000 mPa · s (No. 2)
I got
【００４２】［実施例３］前記水性樹脂Ａ、無機系充填
剤として炭酸カルシウム、及び、水性ウレタン樹脂〔旭
電化工業（株）製アデカボンデタイターＨＵＸ−２９０
Ｈ〕（以下、これを密着性付与成分Ｕと表示する）を、
それぞれ固形分比で４０重量％、３０重量％、及び、３
０重量％の割合で混合して、全体の粘度が約７，０００
mPa・sとなるように調整した本発明のシーラー用水性樹
脂組成物（No.3）を得た。Example 3 The aqueous resin A, calcium carbonate as an inorganic filler, and an aqueous urethane resin [Adekabon detiter HUX-290 manufactured by Asahi Denka Kogyo KK]
H] (hereinafter, referred to as adhesion imparting component U)
40% by weight, 30% by weight, and 3%
0% by weight to give a total viscosity of about 7,000
An aqueous resin composition for a sealer (No. 3) of the present invention adjusted to have a mPa · s was obtained.
【００４３】［実施例４］前記水性樹脂Ｂ、無機系充填
剤として炭酸カルシウム、前記密着性付与成分Ｕ、及
び、顔料としてチタン白を、それぞれ固形分比で３０重
量％、３９重量％、３０重量％、及び、１重量％の割合
で混合して、全体の粘度が約８，０００mPa・sとなるよ
うに調整した本発明のシーラー用水性樹脂組成物（No.
4）を得た。Example 4 The aqueous resin B, calcium carbonate as an inorganic filler, the adhesion-imparting component U, and titanium white as a pigment were respectively 30% by weight, 39% by weight, and 30% by weight in terms of solid content. % By weight and 1% by weight so that the total viscosity of the aqueous resin composition for a sealer of the present invention was adjusted to about 8,000 mPa · s (No.
4) got.
【００４４】［実施例５］前記水性樹脂Ａ、無機系充填
剤として炭酸カルシウム、及び、水性エポキシ樹脂〔大
日本インキ（株）製Ｔ−１５２Ｗ〕（以下、これを密着
性付与成分Ｅと表示する）を、それぞれ固形分比で４０
重量％、３０重量％、及び、３０重量％の割合で混合し
て、全体の粘度が約８，０００mPa・sとなるように調整
した本発明のシーラー用水性樹脂組成物（No.5）を得
た。Example 5 The above-mentioned aqueous resin A, calcium carbonate as an inorganic filler, and an aqueous epoxy resin [T-152W manufactured by Dainippon Ink Co., Ltd.] (hereinafter referred to as an adhesion imparting component E) ) At a solid content ratio of 40
% By weight, 30% by weight, and 30% by weight of the aqueous resin composition for a sealer of the present invention (No. 5) adjusted to have a total viscosity of about 8,000 mPa · s. Obtained.
【００４５】［実施例６］前記水性樹脂Ｂ、無機系充填
剤として炭酸カルシウム、前記密着性付与成分Ｅ、及
び、顔料としてチタン白を、それぞれ固形分比で３０重
量％、３９重量％、３０重量％、及び、１重量％の割合
で混合して、全体の粘度が約１０，０００mPa・sとなる
ように調整した本発明のシーラー用水性樹脂組成物（N
o.6）を得た。Example 6 The aqueous resin B, calcium carbonate as the inorganic filler, the adhesion-imparting component E, and titanium white as the pigment were respectively 30% by weight, 39% by weight, 30% by weight and 30% by weight based on the solid content. % By weight and 1% by weight to adjust the total viscosity to about 10,000 mPa · s.
o.6).
【００４６】［実施例７］前記水性樹脂Ａ、無機系充填
剤として炭酸カルシウム、前記密着性付与成分Ｕ、及
び、前記密着性付与成分Ｅを、それぞれ固形分比で４０
重量％、３０重量％、１５重量％、及び、１５重量％の
割合で混合して、全体の粘度が約１１，０００mPa・sと
なるように調整した本発明のシーラー用水性樹脂組成物
（No.7）を得た。Example 7 The aqueous resin A, calcium carbonate as an inorganic filler, the adhesion-imparting component U, and the adhesion-imparting component E were each used in a solid content ratio of 40%.
% By weight, 30% by weight, 15% by weight, and 15% by weight to adjust the total viscosity to about 11,000 mPa · s. .7).
【００４７】［実施例８］前記水性樹脂Ｂ、無機系充填
剤として炭酸カルシウム、前記密着性付与成分Ｕ、前記
密着性付与成分Ｅ、及び、顔料としてチタン白を、それ
ぞれ固形分比で３０重量％、３９重量％、１５重量％、
１５重量％、及び、１重量％の割合で混合して、全体の
粘度が約１４，０００mPa・sとなるように調整した本発
明のシーラー用水性樹脂組成物（No.8）を得た。Example 8 The water-based resin B, calcium carbonate as an inorganic filler, the adhesion-imparting component U, the adhesion-imparting component E, and titanium white as a pigment were each 30 wt. %, 39% by weight, 15% by weight,
The aqueous resin composition for a sealer of the present invention (No. 8) was prepared by mixing at 15% by weight and 1% by weight to adjust the total viscosity to about 14,000 mPa · s.
【００４８】［実施例９］前記水性樹脂Ａ及び無機系充
填剤として表面改質チタニア〔デュポン社製、タイピュ
アＲ９００〕を、それぞれ固形分比で６０重量％及び４
０重量％の割合で混合して、全体の粘度が約８，０００
mPa・sとなるように調整した本発明のシーラー用水性樹
脂組成物（No.9）を得た。Example 9 Aqueous resin A and surface-modified titania (manufactured by DuPont, Typure R900) as an inorganic filler were used in a solid content ratio of 60% by weight and 4% by weight, respectively.
0% by weight so that the total viscosity is about 8,000.
An aqueous resin composition for a sealer (No. 9) of the present invention adjusted to have mPa · s was obtained.
【００４９】［比較例１］ポリ塩化ビニル樹脂３５重量
％と、無機系充填剤として炭酸カルシウム３０重量％
と、密着性付与するものとしてイソシアネート系樹脂
（有機溶剤を含む）５重量％と、可塑剤３０重量％とを
混合して従来のシーラー用樹脂組成物を得た。Comparative Example 1 35% by weight of polyvinyl chloride resin and 30% by weight of calcium carbonate as an inorganic filler
Then, 5% by weight of an isocyanate-based resin (including an organic solvent) for imparting adhesion and 30% by weight of a plasticizer were mixed to obtain a conventional resin composition for a sealer.
【００５０】上記実施例１〜９で得られた各シーラー用
水性樹脂組成物、及び、比較例１で得られたシーラー用
樹脂組成物それぞれについて、塗装性、密着性を調べた
ところ下記表１に示す結果を得た。Each of the aqueous resin composition for a sealer obtained in Examples 1 to 9 and the resin composition for a sealer obtained in Comparative Example 1 were examined for coatability and adhesion. Were obtained.
【００５１】[0051]
【表１】 [Table 1]
【００５２】上記表１において、塗装性評価は、自動車
用カチオン電荷塗装を施した表面処理鋼板（電気亜鉛メ
ッキ、溶融亜鉛メッキ、亜鉛合金メッキ等）の上に、上
記各樹脂組成物（No.1〜9）を厚さ１mmとなるように塗
布して１００℃で予熱し、最終的には１４０℃で３０分
間加熱処理をして表面外観を観察し、光沢があるものを
○、光沢の無いものを△、一部ハジキがあるものを×と
した。In Table 1 above, the coating properties were evaluated by coating each of the above resin compositions (No. 1) on a surface-treated steel sheet (electrogalvanized, hot-dip galvanized, zinc alloy-plated, etc.) on which a cationic charge coating for automobiles was applied. 1-9) is applied to a thickness of 1 mm, preheated at 100 ° C, and finally heat treated at 140 ° C for 30 minutes to observe the surface appearance. Those that did not exist were marked with △, and those with some repelling were marked with x.
【００５３】また、密着性評価は、上記塗装性評価に使
用した鋼板を用いて、自動車規格ＪＡＳＯ Ｍ−３２３
−７７に規定された試験方法で被膜の接着強度を測定
し、接着強度が１５kg／cm2以上の場合を◎、１０〜１
５kg／cm2の場合を○、１０kg／cm2未満のもの或いは界
面破壊が生じたものを×とした。The adhesion was evaluated by using the steel sheet used in the above evaluation of the coating property, according to the automotive standard JASO M-323.
The adhesive strength of the coating was measured by the test method specified in -77, and when the adhesive strength was 15 kg / cm 2 or more,
The case of 5 kg / cm 2 was evaluated as ○, and the case of less than 10 kg / cm 2 or the one in which interfacial breakdown occurred was evaluated as ×.
【００５４】以上の結果から分かるように、本願発明の
シーラー用水性樹脂組成物（No.1〜9）は、従来の塩化
ビニル系樹脂を主とするシーラー用樹脂組成物（比較例
１）と同等若しくはそれ以上の塗装性及び密着性を有す
るものとなっている。しかも、塩素元素を含まずかつ有
機溶媒を含まないので、比較例１のものとは比べものに
ならないほど環境負荷が極力軽減されている。As can be seen from the above results, the aqueous resin compositions for sealers of the present invention (Nos. 1 to 9) were different from the conventional resin compositions for sealers mainly composed of vinyl chloride resin (Comparative Example 1). It has the same or better paintability and adhesion. Moreover, since it does not contain the chlorine element and does not contain the organic solvent, the environmental load is reduced as much as that of the comparative example 1.
【００５５】次に、本願第１発明のうち、有機系増粘剤
を用いたものや無機充填剤と有機系増粘剤との混合物を
用いたものを実施例１０〜２２に示す。Next, examples 10 to 22 of the first invention of the present application are those using an organic thickener and those using a mixture of an inorganic filler and an organic thickener.
【００５６】［実施例１０］それぞれ固形分比で、前記
水性樹脂Ａ９０重量％、及び、有機系増粘剤として平均
分子量約２万のポリエチレングリコール（以下、ＰＥＧ
と略す）１０重量％を添加・混合して、全体の粘度が約
１２,０００mＰa・sとなるように調整した発明のシーラ
ー用水性樹脂組成物（No.10）を得た。Example 10 90% by weight of the aqueous resin A and polyethylene glycol having an average molecular weight of about 20,000 (hereinafter referred to as PEG)
10% by weight) was added and mixed to obtain a water-based resin composition for a sealer (No. 10) of the invention in which the total viscosity was adjusted to about 12,000 mPa · s.
【００５７】［実施例１１］それぞれ固形分比で、前記
水性樹脂Ａ９５重量％、及び、増粘剤としてカルボキシ
メチルセルロース（以下、ＣＭＣと略す）５重量％を添
加・混合して、全体の粘度が約１０,０００mＰa・sとな
るように調整した本発明のシーラー用水性樹脂組成物
（No.11）を得た。Example 11 In terms of solid content ratio, 95% by weight of the aqueous resin A and 5% by weight of carboxymethylcellulose (hereinafter abbreviated as CMC) as a thickener were added and mixed to obtain an overall viscosity. An aqueous resin composition for a sealer of the present invention (No. 11) adjusted to about 10,000 mPa · s was obtained.
【００５８】［実施例１２］それぞれ固形分比で、前記
水性樹脂Ａ９６重量％、及び、有機系増粘剤としてヒド
ロキシメチルセルロース（以下、ＨＭＣと略す）４重量
％を添加・混合して、全体の粘度が約１８,０００mＰa・
sとなるように調整した本発明のシーラー用水性樹脂組
成物（No.12）を得た。[Example 12] 96% by weight of the aqueous resin A and 4% by weight of hydroxymethylcellulose (hereinafter abbreviated as HMC) as an organic thickener were added and mixed at a solid content ratio, respectively, and the whole was mixed. The viscosity is about 18,000mPa ・
Thus, an aqueous resin composition for a sealer (No. 12) of the present invention adjusted to be s was obtained.
【００５９】［実施例１３］それぞれ固形分比で、前記
水性樹脂Ａ４５重量％、前記ＰＥＧ１０重量％、及び、
前記密着性付与成分Ｕ４５重量％を添加・混合して、全
体の粘度が約１３,０００mＰa・sとなるように調整した
本発明のシーラー用水性樹脂組成物（No.13）を得た。Example 13 45% by weight of the aqueous resin A, 10% by weight of the PEG, and
The above-mentioned adhesiveness-imparting component U (45% by weight) was added and mixed to obtain an aqueous resin composition for a sealer (No. 13) of the present invention in which the total viscosity was adjusted to about 13,000 mPa · s.
【００６０】［実施例１４］それぞれ固形分比で、前記
水性樹脂Ａ４５重量％、前記ＣＭＣ１０重量％、及び、
前記密着性付与成分Ｕ４５重量％を添加・混合して、全
体の粘度が約１２,０００mＰa・sとなるように調整した
本発明のシーラー用水性樹脂組成物（No.14）を得た。[Example 14] In terms of solid content ratio, 45% by weight of the aqueous resin A, 10% by weight of the CMC, and
The adhesiveness-imparting component U (45% by weight) was added and mixed to obtain an aqueous resin composition for a sealer (No. 14) of the present invention in which the total viscosity was adjusted to about 12,000 mPa · s.
【００６１】［実施例１５］それぞれ固形分比で、前記
水性樹脂Ａ５０重量％、前記ＨＭＣ２重量％、及び、前
記密着性付与成分Ｕ４８重量％を添加・混合して、全体
の粘度が約１６,０００mＰa・sとなるように調整した本
発明のシーラー用水性樹脂組成物（No.15）を得た。[Example 15] 50% by weight of the aqueous resin A, 2% by weight of the HMC, and 48% by weight of the adhesion-imparting component U were added and mixed at a solid content ratio, and the total viscosity was about 16, An aqueous resin composition for a sealer of the present invention (No. 15) adjusted to 000 mPa · s was obtained.
【００６２】［実施例１６］それぞれ固形分比で、前記
水性樹脂Ｂ８９重量％、前記ＰＥＧ１０重量％、顔料と
してチタン白１重量％を添加・混合して、全体の粘度が
約１３,０００mＰa・sとなるように調整した本発明のシ
ーラー用水性樹脂組成物（No.16）を得た。[Example 16] 89% by weight of the aqueous resin B, 10% by weight of the PEG, and 1% by weight of titanium white as a pigment were added and mixed at a solid content ratio to give a total viscosity of about 13,000 mPa · s. Thus, an aqueous resin composition for a sealer of the present invention (No. 16) was prepared.
【００６３】［実施例１７］それぞれ固形分比で、前記
水性樹脂Ｂ４５重量％、前記ＰＥＧ１０重量％、及び、
前記密着性付与成分Ｕ４５重量％を添加・混合して、全
体の粘度が約１６,０００mＰa・sとなるように調整した
本発明のシーラー用水性樹脂組成物（No.17）を得た。[Example 17] In terms of solid content ratio, 45% by weight of the aqueous resin B, 10% by weight of the PEG, and
The adhesiveness-imparting component U (45% by weight) was added and mixed to obtain a water-based resin composition for a sealer (No. 17) of the present invention in which the total viscosity was adjusted to about 16,000 mPa · s.
【００６４】［実施例１８］それぞれ固形分比で、前記
水性樹脂Ｂ３０重量％、前記ＰＥＧ１０重量％、前記密
着性付与成分Ｕ３０重量％、及び、無機系充填剤として
炭酸カルシウム３０重量％を添加・混合して、全体の粘
度が約２０,０００mＰa・sとなるように調整した本発明
のシーラー用水性樹脂組成物（No.18）を得た。Example 18 30% by weight of the aqueous resin B, 10% by weight of the PEG, 30% by weight of the adhesion-imparting component U, and 30% by weight of calcium carbonate as an inorganic filler were added at solid content ratios. By mixing, an aqueous resin composition for a sealer of the present invention (No. 18) was adjusted to have an overall viscosity of about 20,000 mPa · s.
【００６５】［実施例１９］それぞれ固形分比で、前記
水性樹脂Ａ６０重量％、前記ＨＭＣ２重量％、及び、前
記密着性付与成分Ｅ３８重量％を添加・混合して、全体
の粘度が約２０,０００mＰa・sとなるように調整した本
発明のシーラー用水性樹脂組成物（No.19）を得た。Example 19 In a solid content ratio, 60% by weight of the aqueous resin A, 2% by weight of the HMC, and 38% by weight of the adhesion-imparting component E were added and mixed to give a total viscosity of about 20, An aqueous resin composition for a sealer of the present invention (No. 19) adjusted to 000 mPa · s was obtained.
【００６６】［実施例２０］それぞれ固形分比で、前記
水性樹脂Ｂ３４重量％、前記ＨＭＣ２重量％、前記密着
性付与成分Ｅ３４重量％、及び、前記炭酸カルシウム３
０重量％を添加・混合して、全体の粘度が約２６,００
０mＰa・sとなるように調整した本発明のシーラー用水性
樹脂組成物（No.20）を得た。[Example 20] In terms of solid content ratio, 34% by weight of the aqueous resin B, 2% by weight of the HMC, 34% by weight of the adhesion-imparting component E, and 3% by weight of the calcium carbonate 3
0% by weight was added and mixed to give a total viscosity of about 26,000.
An aqueous resin composition for a sealer (No. 20) of the present invention adjusted to be 0 mPa · s was obtained.
【００６７】［実施例２１］それぞれ固形部比で、前記
水性樹脂Ａ４０重量％、前記ＰＥＧ１０重量％、前記密
着性付与成分Ｕ２５重量％、及び、前記密着性付与成分
Ｅ２５重量％を添加・混合して、全体の粘度が約１６,
０００mＰa・sとなるように調整した本発明のシーラー用
水性樹脂組成物（No.21）を得た。[Example 21] 40% by weight of the aqueous resin A, 10% by weight of the PEG, 25% by weight of the adhesion-imparting component U, and 25% by weight of the adhesion-imparting component E were added and mixed in a solid part ratio. And the overall viscosity is about 16,
An aqueous resin composition for a sealer of the present invention (No. 21) adjusted to 000 mPa · s was obtained.
【００６８】［実施例２２］それぞれ固形分比で、前記
水性樹脂Ｂ３０重量％、前記ＰＥＧ１０重量％、前記密
着性付与成分Ｕ１５重量％、前記密着性付与成分Ｅ１５
重量％、及び、無機系充填剤としてチタニア３０重量％
を添加・混合して、全体の粘度が約１９,０００mＰa・s
となるように調整した本発明のシーラー用水性樹脂組成
物（No.22）を得た。[Example 22] 30% by weight of the aqueous resin B, 10% by weight of the PEG, 15% by weight of the adhesion-imparting component U, and 15% by weight of the adhesion-imparting component E15 in terms of the solid content ratio.
% By weight, and 30% by weight of titania as an inorganic filler
Is added and mixed to give a total viscosity of about 19,000 mPa · s.
Thus, an aqueous resin composition for a sealer of the present invention (No. 22) was prepared.
【００６９】以上の実施例１０〜２２について、前記実
施例１〜９と同様の試験及び評価を行い、下記表２に示
す結果を得た。The same tests and evaluations as in Examples 1 to 9 were performed on Examples 10 to 22 described above, and the results shown in Table 2 below were obtained.
【００７０】[0070]
【表２】 [Table 2]
【００７１】以上の結果から分かるように、本願発明の
シーラー用水性樹脂組成物（No.10〜22）も、前記シー
ラー用水性樹脂組成物（No.1〜9）と同様、従来の塩化
ビニル系樹脂を主とするシーラー用樹脂組成物（比較例
１）と同等若しくはそれ以上の塗装性及び密着性を有す
るものとなっている。しかも、塩素元素を含まずかつ有
機溶媒を含まないので、比較例１のものとは比べものに
ならないほど環境負荷が極力軽減されている。As can be seen from the above results, the aqueous resin compositions for sealers (Nos. 10 to 22) of the present invention are also similar to the aqueous resin compositions for sealers (Nos. 1 to 9) in the same manner as the conventional vinyl chloride resins. It has a coating property and adhesiveness equal to or higher than that of a resin composition for a sealer mainly containing a base resin (Comparative Example 1). Moreover, since it does not contain the chlorine element and does not contain the organic solvent, the environmental load is reduced as much as that of the comparative example 1.
【００７２】次に、水溶性マグネシウム化合物を添加し
た本願発明（以下、本願第２発明という）のうち、無機
系充填剤を用いたものを実施例２３〜３１に示し、比較
例と共に説明する。Next, among the inventions of the present application to which a water-soluble magnesium compound is added (hereinafter referred to as the second invention), those using an inorganic filler are shown in Examples 23 to 31 and will be described together with Comparative Examples.
【００７３】［実施例２３］それぞれ固形分比で、前記
水性樹脂Ａ７０重量％、前記炭酸カルシウム２５重量
％、及び、耐食性付与剤としてのリン酸二水素マグネシ
ウム〔Ｍg(Ｈ2ＰＯ4)2〕５重量％を添加・混合して、全
体の粘度が約８，０００mＰa・sとなるように調整した本
発明のシーラー用水性樹脂組成物（No.23）を得た。Example 23 70% by weight of the aqueous resin A, 25% by weight of the calcium carbonate, and magnesium dihydrogen phosphate [Mg (H 2 PO 4 ) 2 ] as a corrosion resistance-imparting agent in terms of the solid content. 5% by weight was added and mixed to obtain an aqueous resin composition for a sealer (No. 23) of the present invention in which the total viscosity was adjusted to about 8,000 mPa · s.
【００７４】［実施例２４］それぞれ固形分比で、前記
水性樹脂Ｂ６０重量％、前記炭酸カルシウム２９重量
％、顔料としてチタン白１重量％、及び、前記リン酸二
水素マグネシウム１０重量％を添加・混合して、全体の
粘度が約１１，０００mＰa・sとなるように調整した本発
明のシーラー用水性樹脂組成物（No.24）を得た。[Example 24] 60% by weight of the aqueous resin B, 29% by weight of the calcium carbonate, 1% by weight of titanium white as a pigment, and 10% by weight of the magnesium dihydrogen phosphate were added in a solid content ratio. By mixing, an aqueous resin composition for a sealer of the present invention (No. 24) was adjusted to have an overall viscosity of about 11,000 mPa · s.
【００７５】［実施例２５］それぞれ固形分比で、前記
水性樹脂Ａ４０重量％、前記炭酸カルシウム２５重量
％、前記密着性付与成分Ｕ３０重量％、及び、前記リン
酸二水素マグネシウム５重量％を添加・混合して、全体
の粘度が約９，０００mＰa・sとなるように調整した本発
明のシーラー用水性樹脂組成物（No.25）を得た。Example 25 In the respective solid content ratios, 40% by weight of the aqueous resin A, 25% by weight of the calcium carbonate, 30% by weight of the adhesion imparting component U, and 5% by weight of the magnesium dihydrogen phosphate were added. The mixture was mixed to obtain an aqueous resin composition for a sealer (No. 25) of the present invention, which was adjusted so that the total viscosity was about 9,000 mPa · s.
【００７６】［実施例２６］それぞれ固形分比で、前記
水性樹脂Ｂ３０重量％、前記炭酸カルシウム２９重量
％、前記密着性付与成分Ｕ３０重量％、顔料としてチタ
ン白１重量％、及び、前記リン酸二水素マグネシウム１
０重量％を添加・混合して、全体の粘度が約１３，００
０mＰa・sとなるように調整した本発明のシーラー用水性
樹脂組成物（No.26）を得た。[Example 26] 30% by weight of the aqueous resin B, 29% by weight of the calcium carbonate, 30% by weight of the adhesion imparting component U, 1% by weight of titanium white as a pigment, and Magnesium dihydrogen 1
0% by weight is added and mixed to give a total viscosity of about 13,000.
An aqueous resin composition for a sealer of the present invention (No. 26) adjusted to be 0 mPa · s was obtained.
【００７７】［実施例２７］それぞれ固形分比で、前記
水性樹脂Ａ４０重量％、前記炭酸カルシウム２５重量
％、前記密着性付与成分Ｅ３０重量％、及び、前記リン
酸二水素マグネシウム５重量％を添加・混合して、全体
の粘度が約１０，０００mＰa・sとなるように調整した本
発明のシーラー用水性樹脂組成物（No.27）を得た。[Example 27] In terms of solid content ratio, 40% by weight of the aqueous resin A, 25% by weight of the calcium carbonate, 30% by weight of the adhesion-imparting component E, and 5% by weight of the magnesium dihydrogen phosphate were added. The mixture was mixed to obtain an aqueous resin composition for a sealer (No. 27) of the present invention, which was adjusted so that the total viscosity was about 10,000 mPa · s.
【００７８】［実施例２８］それぞれ固形分比で、前記
水性樹脂Ｂ３０重量％、前記炭酸カルシウム２９重量
％、前記密着性付与成分Ｅ３０重量％、前記チタン白１
重量％、及び、前記リン酸二水素マグネシウム１０重量
％を添加・混合して、全体の粘度が約１５，０００mＰa
・sとなるように調整した本発明のシーラー用水性樹脂組
成物（No.28）を得た。Example 28 30% by weight of the aqueous resin B, 29% by weight of the calcium carbonate, 30% by weight of the adhesion-imparting component E, 30% by weight of the titanium white 1
% By weight and 10% by weight of the above-mentioned magnesium dihydrogen phosphate are added and mixed to give a total viscosity of about 15,000 mPa
-An aqueous resin composition for a sealer of the present invention (No. 28) adjusted to be s was obtained.
【００７９】［実施例２９］それぞれ固形分比で、前記
水性樹脂Ａ４０重量％、前記炭酸カルシウム２５重量
％、前記密着性付与成分Ｕ１５重量％、前記密着性付与
成分Ｅ１５重量％、及び、前記リン酸二水素水素マグネ
シウム５重量％を添加・混合して、全体の粘度が約１
１，０００mＰa・sとなるように調整した本発明のシーラ
ー用水性樹脂組成物（No.29）を得た。[Example 29] In terms of solid content ratio, 40% by weight of the aqueous resin A, 25% by weight of the calcium carbonate, 15% by weight of the adhesion-imparting component U, 15% by weight of the adhesion-imparting component E, and 5% by weight of magnesium hydrogen dihydrogenate is added and mixed to give a total viscosity of about 1%.
An aqueous resin composition for a sealer of the present invention (No. 29) adjusted to 1,000 mPa · s was obtained.
【００８０】［実施例３０］それぞれ固形分比で、前記
水性樹脂Ｂ３０重量％、前記炭酸カルシウム２９重量
％、前記密着性付与成分Ｕ１５重量％、前記密着性付与
成分Ｅ１５重量％、前記チタン白１重量％、及び、前記
リン酸二水素マグネシウム１０重量％を添加・混合し
て、全体の粘度が約１４，０００mＰa・sとなるように調
整した本発明のシーラー用水性樹脂組成物（No.30）を
得た。Example 30 30% by weight of aqueous resin B, 29% by weight of calcium carbonate, 15% by weight of adhesion-imparting component U, 15% by weight of adhesion-imparting component E, 15% by weight of titanium white 1 % Of the magnesium dihydrogen phosphate and 10% by weight of the above magnesium dihydrogen phosphate were added and mixed to adjust the total viscosity to about 14,000 mPa · s. ) Got.
【００８１】［実施例３１］それぞれ固形分比で、前記
水性樹脂Ａ３５重量％、前記炭酸カルシウム３０重量
％、前記密着性付与成分Ｕ３４重量％、及び、前記リン
酸二水素マグネシウム１重量％を添加・混合して、全体
の粘度が約８，０００mＰa・sとなるように調整した本発
明のシーラー用水性樹脂組成物（No.31）を得た。[Example 31] 35% by weight of the aqueous resin A, 30% by weight of the calcium carbonate, 34% by weight of the adhesion-imparting component U, and 1% by weight of the magnesium dihydrogen phosphate were added in terms of solid content ratio. The mixture was mixed to obtain an aqueous resin composition for a sealer (No. 31) of the present invention, which was adjusted so that the total viscosity was about 8,000 mPa · s.
【００８２】［比較例２］前記水性樹脂Ａ４０重量％
と、充填剤として炭酸カルシウム３０重量％と、密着性
付与成分Ｕ３０重量％とを混合してシーラー用樹脂組成
物を得た。Comparative Example 2 40% by weight of the aqueous resin A
Then, 30% by weight of calcium carbonate as a filler and 30% by weight of an adhesion imparting component U were mixed to obtain a resin composition for a sealer.
【００８３】上記実施例２３〜３１で得られた各シーラ
ー用水性樹脂組成物（No.23〜31）、及び、上記比較例
２で得られたシーラー用樹脂組成物それぞれについて、
塗装性、密着性を調べたところ下記表３に示す結果を得
た。Each of the aqueous resin compositions for sealers (Nos. 23 to 31) obtained in Examples 23 to 31 and the resin composition for sealers obtained in Comparative Example 2 was
When the paintability and the adhesion were examined, the results shown in Table 3 below were obtained.
【００８４】[0084]
【表３】 [Table 3]
【００８５】上記表３において、塗装性評価は、自動車
用カチオン電荷塗装を施した表面処理鋼板（電気亜鉛メ
ッキ、溶融亜鉛メッキ、亜鉛合金メッキ等）の上に、上
記各水性樹脂組成物（No.23〜31）を厚さ１mmとなるよ
うに塗布して１００℃で予熱し、最終的には１４０℃で
３０分間加熱処理をして表面外観を観察し、光沢がある
ものを○、光沢の無いものを△、一部ハジキがあるもの
を×とした。In Table 3 above, the paintability was evaluated by coating the above water-based resin compositions (No.) on a surface-treated steel sheet (electrogalvanized, hot-dip galvanized, zinc alloy-plated, etc.) coated with a cationic charge coating for automobiles. .23-31) to a thickness of 1 mm, preheated at 100 ° C, and finally heat-treated at 140 ° C for 30 minutes to observe the surface appearance. A sample without a mark was marked with △, and a sample with some repelling was marked as ×.
【００８６】また、密着性評価は、上記塗装性評価に使
用した鋼板を用いて、ＪＡＳＯ Ｍ−３０６−８８に規
定された試験方法で被膜の接着強度を測定し、接着強度
が１５kg／cm2以上の場合を◎、１０〜１５kg／cm2の場
合を○、１０kg／cm2未満のもの或いは界面破壊が生じ
たものを×とした。The adhesion was evaluated by measuring the adhesive strength of the coating using the steel sheet used for the evaluation of the coating property according to the test method specified in JASO M-306-88, and finding that the adhesive strength was 15 kg / cm 2. the case of more than ◎, the case of 10~15kg / cm 2 ○, was × those things or interfacial fracture than 10 kg / cm 2 occurs.
【００８７】さらに、耐食性評価は、上記塗装性評価に
使用した電気亜鉛メッキ鋼板を用いて、ＪＩＳ Ｃ−０
０２３に規定された塩水噴霧試験方法で５００時間後の
外観を評価し、殆ど変化の無いものを◎、白錆が発生す
るが赤錆が発生しないものを○、赤錆が発生したものを
×とした。Further, the corrosion resistance was evaluated according to JIS C-0 using the electrogalvanized steel sheet used for the above-mentioned evaluation of paintability.
The appearance after 500 hours was evaluated by the salt spray test method specified in No. 023, ◎ indicates that there was almost no change, ○ indicates that white rust was generated but no red rust was generated, and X was that where red rust was generated. .
【００８８】以上の結果から分かるように、本願第２発
明のシーラー用水性樹脂組成物（No.23〜31）は、前記
比較例１のシーラー用樹脂組成物と同等若しくはそれ以
上の塗装性及び密着性を有するものとなっている。As can be seen from the above results, the aqueous resin composition for sealer of the second invention of the present application (No. 23 to No. 31) has the same or higher coatability and sealability as the resin composition for sealer of Comparative Example 1. It has adhesiveness.
【００８９】また、本願第２発明のシーラー用水性樹脂
組成物（No.23〜31）は、水溶性マグネシウム化合物を
含まないシーラー用樹脂組成物（比較例２）に比して、
耐食性にも非常に優れるものであることが分かる。The aqueous resin composition for a sealer (No. 23 to No. 31) of the second invention of the present application is different from the resin composition for a sealer containing no water-soluble magnesium compound (Comparative Example 2).
It turns out that it is very excellent also in corrosion resistance.
【００９０】次に、本願第２発明のうち、有機系増粘剤
を用いたもの、有機系増粘剤と無機系充填剤との混合物
を用いたもの、を実施例３２〜３９に示し、前記比較例
１及び２と共に説明する。Next, among the second invention of the present application, those using an organic thickener and those using a mixture of an organic thickener and an inorganic filler are shown in Examples 32-39. This will be described together with Comparative Examples 1 and 2.
【００９１】［実施例３２］それぞれ固形分比で、前記
水性樹脂Ａ８５重量％、前記ＰＥＧ１０重量％、及び、
前記リン酸二水素マグネシウム５重量％を添加・混合し
て、全体の粘度が約１５,０００mＰa・sとなるように調
整した本発明のシーラー用水性樹脂組成物（No.32）を
得た。[Example 32] In terms of the solid content ratio, 85% by weight of the aqueous resin A, 10% by weight of the PEG, and
5% by weight of the above magnesium dihydrogen phosphate was added and mixed to obtain an aqueous resin composition for a sealer (No. 32) of the present invention in which the total viscosity was adjusted to about 15,000 mPa · s.
【００９２】［実施例３３］それぞれ固形分比で、前記
水性樹脂Ｂ８０重量％、前記ＰＥＧ１０重量％、及び、
前記リン酸二水素マグネシウム１０重量％を添加・混合
して、全体の粘度が約１８,０００mＰa・sとなるように
調整した本発明のシーラー用水性樹脂組成物（No.33）
を得た。Example 33 80% by weight of the aqueous resin B, 10% by weight of the PEG, and
The aqueous resin composition for a sealer of the present invention (No. 33) in which 10% by weight of the above magnesium dihydrogen phosphate was added and mixed to adjust the total viscosity to about 18,000 mPa · s.
I got
【００９３】［実施例３４］それぞれ固形分比で、前記
水性樹脂Ａ４０重量％、前記ＰＥＧ１０重量％、前記密
着性付与成分Ｕ４５重量％、及び、前記リン酸二水素マ
グネシウム５重量％を添加・混合して、全体の粘度が約
１６,０００mＰa・sとなるように調整した本発明のシー
ラー用水性樹脂組成物（No.34）を得た。Example 34 40% by weight of the aqueous resin A, 10% by weight of the PEG, 45% by weight of the adhesion-imparting component U, and 5% by weight of the magnesium dihydrogen phosphate were added and mixed in a solid content ratio. Thus, an aqueous resin composition for a sealer (No. 34) of the present invention was adjusted so that the total viscosity was about 16,000 mPa · s.
【００９４】［実施例３５］それぞれ固形分比で、前記
水性樹脂Ｂ５０重量％、前記ＨＣＭ４重量％、前記密着
性付与成分Ｕ３６重量％、及び、前記リン酸二水素マグ
ネシウム１０重量％を添加・混合して、全体の粘度が約
２３,０００mＰa・sとなるように調整した本発明のシー
ラー用水性樹脂組成物（No.35）を得た。Example 35 50% by weight of the aqueous resin B, 4% by weight of the HCM, 36% by weight of the adhesion-imparting component U, and 10% by weight of the magnesium dihydrogen phosphate were added and mixed in a solid content ratio. Thus, an aqueous resin composition for a sealer (No. 35) of the present invention was adjusted so that the total viscosity was about 23,000 mPa · s.
【００９５】［実施例３６］それぞれ固形分比で、前記
水性樹脂Ａ４５重量％、前記ＰＥＧ１０重量％、前記密
着性付与成分Ｅ４０重量％、及び、前記リン酸二水素マ
グネシウム５重量％を添加・混合して、全体の粘度が約
２４,０００mＰa・sとなるように調整した本発明のシー
ラー用水性樹脂組成物（No.36）を得た。Example 36 45% by weight of the aqueous resin A, 10% by weight of the PEG, 40% by weight of the adhesion-imparting component E, and 5% by weight of the magnesium dihydrogen phosphate were added and mixed in a solid content ratio. Thus, an aqueous resin composition for a sealer (No. 36) of the present invention was adjusted so that the total viscosity was about 24,000 mPa · s.
【００９６】［実施例３７］それぞれ固形分比で、前記
水性樹脂Ｂ３０重量％、前記ＨＭＣ４重量％、前記密着
性付与成分Ｅ２６重量％、前記表面改質チタニア３０重
量％、及び、前記リン酸二水素マグネシウム１０重量％
を添加・混合して、全体の粘度が約２９,０００mＰa・s
となるように調整した本発明のシーラー用水性樹脂組成
物（No.37）を得た。[Example 37] 30% by weight of the aqueous resin B, 4% by weight of the HMC, 26% by weight of the adhesion-imparting component E, 30% by weight of the surface-modified titania, and 30% by weight of Magnesium hydrogen 10% by weight
Is added and mixed to give a total viscosity of about 29,000 mPa · s.
Thus, an aqueous resin composition for a sealer of the present invention (No. 37) was prepared.
【００９７】［実施例３８］それぞれ固形部比で、前記
水性樹脂Ａ６０重量％、前記ＣＭＣ５重量％、前記密着
性付与成分Ｕ１５重量％、前記密着性付与成分Ｅ１５重
量％、及び、前記リン酸二水素マグネシウム５重量％を
添加・混合して、全体の粘度が約２０,０００mＰa・sと
なるように調整した本発明のシーラー用水性樹脂組成物
（No.38）を得た。[Example 38] 60% by weight of the aqueous resin A, 5% by weight of the CMC, 15% by weight of the adhesion imparting component U, 15% by weight of the adhesion imparting component E, and 5% by weight of magnesium hydrogen was added and mixed to obtain an aqueous resin composition for a sealer (No. 38) of the present invention in which the total viscosity was adjusted to about 20,000 mPa · s.
【００９８】［実施例３９］それぞれ固形分比で、前記
水性樹脂Ｂ４９重量％、前記ＰＥＧ１０重量％、前記密
着性付与成分Ｕ１５重量％、前記密着性付与成分Ｅ１５
重量％、前記チタン白１重量％、及び、前記リン酸二水
素マグネシウム１０重量％を添加・混合して、全体の粘
度が約２５,０００mＰa・sとなるように調整した本発明
のシーラー用水性樹脂組成物（No.39）を得た。Example 39 The aqueous resin B was 49% by weight, the PEG was 10% by weight, the adhesion-imparting component U was 15% by weight, and the adhesion-imparting component E15 was the solid content ratio.
% Of the titanium white, and 10% by weight of the magnesium dihydrogen phosphate were added and mixed to adjust the total viscosity to about 25,000 mPa · s. A resin composition (No. 39) was obtained.
【００９９】以上の実施例３２〜３９について、前記実
施例２３〜３１に対するものと同様の試験及び評価を行
い、下記表４に示す結果を得た。The same tests and evaluations as in Examples 23 to 31 were performed on Examples 32 to 39 described above, and the results shown in Table 4 below were obtained.
【０１００】[0100]
【表４】 [Table 4]
【０１０１】以上の結果から分かるように、本願第２発
明のシーラー用水性樹脂組成物（No.32〜39）も、前記
比較例１のシーラー用樹脂組成物と同等若しくはそれ以
上の塗装性及び密着性を有するものとなっている。As can be seen from the above results, the aqueous resin composition for a sealer of the second invention of the present application (Nos. 32-39) also had the same or higher coatability as that of the resin composition for a sealer of Comparative Example 1 described above. It has adhesiveness.
【０１０２】また、本願第２発明のシーラー用水性樹脂
組成物（No.32〜39）は、水溶性マグネシウム化合物を
含まないシーラー用樹脂組成物（比較例２）に比して、
耐食性にも非常に優れるものであることが分かる。Further, the aqueous resin composition for a sealer of the second invention of the present application (Nos. 32-39) was compared with the resin composition for a sealer containing no water-soluble magnesium compound (Comparative Example 2).
It turns out that it is very excellent also in corrosion resistance.
【０１０３】次に、前記実施例３１で得られたシーラー
用水性樹脂組成物(No.31)について、以下に示す塩水噴
霧試験を行い、さらなる防食・耐食性評価を行った。Next, the aqueous resin composition for a sealer (No. 31) obtained in Example 31 was subjected to the following salt spray test to further evaluate the corrosion prevention and corrosion resistance.
【０１０４】［実施例４０］シーラー用水性樹脂組成物
(No.31)を電気亜鉛メッキ鋼板〔亜鉛量４０グラム／
ｍ2〕の試験片に約１mmの厚さで塗布し、その試験片の
中心付近に塗膜の上からカッターナイフで長さ６０mmの
２本の傷を約５０°の角度で交差させてＸ状に付け、こ
れに対して１９２時間継続して塩水噴霧試験を行い、そ
の後の傷部分及び塗布部周囲からの白錆、赤錆の発生や
膨れ等を観察した。Example 40 Aqueous resin composition for sealer
(No.31) is electrogalvanized steel sheet [zinc amount 40g /
m 2 ] with a thickness of about 1 mm, and near the center of the test piece, two scratches of 60 mm length are crossed at an angle of about 50 ° with a cutter knife from the top of the coating film using X. Then, a salt spray test was carried out continuously for 192 hours, and thereafter, generation of white rust and red rust, swelling, and the like from the scratched portion and around the applied portion were observed.
【０１０５】結果としては、本シーラー用水性樹脂組成
物を塗布している部分は白錆及び赤錆は全く発生せず、
当然、膨れも観察されなかった。また傷部分においては
白錆の発生は若干認められたが赤錆は発生しなかった。As a result, white rust and red rust were not generated at all in the portion to which the aqueous resin composition for a sealer was applied,
Naturally, no swelling was observed. Further, generation of white rust was slightly observed in the scratched portion, but no red rust was generated.
【０１０６】さらに、亜鉛メッキ鋼板の本発明の樹脂組
成物の塗布部周辺においても、白錆の発生は若干認めら
れたが赤錆は発生しなかった。Further, in the vicinity of the galvanized steel sheet around the coated portion of the resin composition of the present invention, white rust was slightly observed but no red rust was observed.
【０１０７】以上のことから、水溶性マグネシウム化合
物を１重量％程度と微量に含有していても防錆効果が著
しく、さらには塗布部周辺の外周境目にも防錆効果が及
ぶことが分かった。従って、このシーラー用水性樹脂組
成物は、これを塗布した部分の外周境目からの腐食を防
止すると共にシーラーの剥がれ落ちを防ぐ事が出来る。From the above, it was found that even when the water-soluble magnesium compound was contained in a trace amount of about 1% by weight, the rust-preventing effect was remarkable, and the rust-preventing effect was also exerted on the outer boundary around the coated portion. . Therefore, the aqueous resin composition for a sealer can prevent corrosion from the outer boundary of a portion to which the sealer is applied and also prevent peeling of the sealer.
【０１０８】［実施例４１］次に、上記実施例３１のシ
ーラー用水性樹脂組成物(No.31)及び比較例として溶剤
系シーリング剤（セメダイン社製）を、３種のメッキ厚
〔片面２０、３０、４０グラム／ｍ2〕の亜鉛メッキ鋼
板にそれぞれ１mm厚に塗布し、上記と同様の塩水噴霧試
験を行った。Example 41 Next, the aqueous resin composition for a sealer (No. 31) of Example 31 and a solvent-based sealing agent (manufactured by Cemedine Co., Ltd.) as a comparative example were prepared with three plating thicknesses [one side 20]. , 30, and 40 g / m 2 ] of a galvanized steel sheet, each having a thickness of 1 mm, and subjected to the same salt spray test as described above.
【０１０９】１９２時間後の結果は、比較例のものでは
メッキ厚が４０グラム／ｍ2の鋼板でも赤錆の発生が認
められたが、本発明のシーラー用水性樹脂組成物(No.3
1)では、３０グラム／ｍ2の鋼板に対して白錆の発生が
認められたが赤錆は発生しなかった。The results after 192 hours show that in the comparative example, the generation of red rust was observed even with a steel plate having a plating thickness of 40 g / m 2 , but the aqueous resin composition for a sealer of the present invention (No. 3)
In 1), generation of white rust was observed on a steel sheet of 30 g / m 2 , but no red rust was generated.
【０１１０】以上のことから、本願発明のシーラー用水
性樹脂組成物を用いれば、亜鉛メッキ鋼板の亜鉛メッキ
厚を薄くしても十分に防錆し得ることが分かる。From the above, it can be seen that the use of the aqueous resin composition for a sealer of the present invention can sufficiently prevent rust even if the galvanized steel sheet is made thinner.
【０１１１】[0111]
【発明の効果】本願『請求項１』に係る発明によれば、
１０００mＰa・s以上の粘度がある水性樹脂を主成分と
し、ここに粘度調整剤によりシーラーとしての適正粘度
に調整されており、さらに構成元素として塩素を含まな
くかつ水性であって有機溶媒を含まないので、環境負荷
が極力軽減され、鋼板に対するシーラーとして画期的な
ものを提供できる。According to the invention of claim 1 of the present application,
The main component is an aqueous resin having a viscosity of 1000 mPa · s or more. The viscosity is adjusted to an appropriate viscosity as a sealer by a viscosity modifier. Therefore, the environmental load is reduced as much as possible, and an innovative sealer for steel sheets can be provided.
【０１１２】さらに、たとえばシーラーを乾燥硬化させ
るためや後工程の塗装定着のために１７０℃以上の高温
に急激に上昇させても、含まれている水分に起因する膨
れやわれ等も発生せずシール性及び密着性に優れ、特に
自動車ボディ用のシーラーとして最適なものを提供でき
る。Furthermore, even if the sealer is rapidly raised to a high temperature of 170 ° C. or higher for drying and curing the sealer or for fixing the paint in a later step, no swelling or cracking due to the contained water is generated. It is excellent in sealability and adhesion, and can provide an optimum sealer especially for an automobile body.
【０１１３】本願『請求項２』に係る発明によれば、上
記請求項１に係る発明が奏する効果に加えて、水溶性マ
グネシウム化合物の添加により著しい防錆能が付与され
ており、特に亜鉛系メッキ鋼板に対して更に好適なシー
ラー用水性樹脂組成物として提供できる。According to the invention of claim 2 of the present application, in addition to the effects of the invention of claim 1, remarkable rust-preventing ability is imparted by the addition of a water-soluble magnesium compound. It can be provided as a more suitable aqueous resin composition for a sealer for a plated steel sheet.
【０１１４】本願『請求項３』に係る発明によれば、粘
度調整剤として無機系充填剤を用いれば、シーラー用水
性樹脂組成物の耐熱性、耐久性、強度を向上させること
ができ、有機系増粘剤を用いれば、粘度調整において水
性樹脂や水溶性マグネシウム化合物との反応を避けて安
定なシーラー用水性樹脂組成物に調整することができ、
これらの混合物を用いれば、所望の粘度範囲に調整し易
くなり、その結果、本願発明のシーラー用樹脂組成物を
広範囲にわたって調整することができる。According to the invention of claim 3 of the present application, when an inorganic filler is used as a viscosity modifier, the heat resistance, durability and strength of the aqueous resin composition for a sealer can be improved, and If a system thickener is used, it can be adjusted to a stable aqueous resin composition for a sealer by avoiding a reaction with an aqueous resin or a water-soluble magnesium compound in viscosity adjustment,
When these mixtures are used, the viscosity can be easily adjusted to a desired viscosity range, and as a result, the resin composition for a sealer of the present invention can be adjusted over a wide range.
【０１１５】本願『請求項４』〜『請求項７』に係る各
発明によれば、請求項１〜３の発明が奏する効果に加え
て、密着性が非常に良好な水性シーラー用樹脂組成物を
提供できる。According to the inventions of claims 4 to 7 of the present application, in addition to the effects of the inventions of claims 1 to 3, the resin composition for aqueous sealers has very good adhesion. Can be provided.
【０１１６】特に、水溶性マグネシウム化合物の含有量
が僅かであっても、本発明のシーラー用水性樹脂組成物
の防錆効果は著しく、しかもシーラー塗布部周辺の塗布
していない部分にまで防錆効果を及ぼすことが出来る。
従って、シーラー塗布した部分が振動や溶接等によりク
ラックが発生した場合や、塗布部周辺の外周境目からの
腐食に対しても十分に防錆出来、ひいては従来これらの
腐食により生じていたシーラーの膨れや剥がれ落ちを防
止することが出来、亜鉛系メッキ鋼板の接合部や折り曲
げ部を長期に亘って保護でき、鋼板の寿命を著しく伸ば
すことができる。In particular, even when the content of the water-soluble magnesium compound is small, the rust-preventing effect of the aqueous resin composition for a sealer of the present invention is remarkable, and the rust-preventive effect is applied to the uncoated portion around the sealer-coated portion. Can be effective.
Therefore, it is possible to sufficiently prevent rust even if the sealer-applied portion is cracked due to vibration, welding, or the like, and corrosion from the outer boundary around the applied portion. And peeling-off can be prevented, the joints and bent portions of the galvanized steel sheet can be protected for a long time, and the life of the steel sheet can be significantly extended.
【０１１７】さらに、本発明のシーラー用水性樹脂組成
物は、上記の通り防錆能が優れているので鋼板そのもの
に設けられるメッキ厚を薄くすることができる。Further, since the aqueous resin composition for a sealer of the present invention has excellent rust prevention as described above, the plating thickness provided on the steel sheet itself can be reduced.
Claims (7)
水性樹脂を主成分として粘度調整剤により粘度が５,０
００〜１００,０００mPa・sに調整されたシーラー用樹脂
組成物からなり、上記水性樹脂は、樹脂固形分２０〜４
０重量％の水分散状態で１０００mＰa・s以上の粘度を
有しかつ構成元素として塩素を含まないポリオレフィン
からなる水性エマルジョンポリオレフィン樹脂であるシ
ーラー用水性樹脂組成物。1. Used for waterproofing and rustproofing of steel sheet, etc.
The viscosity is adjusted to 5.0 by using a viscosity modifier containing an aqueous resin as a main component.
It consists of a resin composition for sealers adjusted to 100 to 100,000 mPa · s, and the aqueous resin has a resin solid content of 20 to 4
An aqueous resin composition for a sealer, which is an aqueous emulsion polyolefin resin comprising a polyolefin having a viscosity of 1000 mPa · s or more in a 0% by weight aqueous dispersion state and containing no chlorine as a constituent element.
1〜１０重量％の割合で添加されてなる請求項１記載の
シーラー用水性樹脂組成物。2. The method according to claim 1, wherein the water-soluble magnesium compound is contained in an amount of 0.
The aqueous resin composition for a sealer according to claim 1, which is added at a ratio of 1 to 10% by weight.
機系増粘剤及びこれらの混合物からなる群から選択され
る１つである請求項１又は２に記載のシーラー用水性樹
脂組成物。3. The aqueous resin composition for a sealer according to claim 1, wherein the viscosity modifier is one selected from the group consisting of an inorganic filler, an organic thickener, and a mixture thereof.
ジョンポリオレフィン樹脂と水性密着性樹脂との混合物
からなり、この混合物の固形分比率が、前者３０〜７０
重量％に対して後者７０〜３０重量である請求項１〜３
のいずれかに記載のシーラー用水性樹脂組成物。4. The aqueous resin comprises a mixture of the aqueous emulsion polyolefin resin and an aqueous adhesive resin, and the mixture has a solid content ratio of 30 to 70.
The latter is 70 to 30% by weight with respect to% by weight.
The aqueous resin composition for a sealer according to any one of the above.
タン樹脂である請求項４記載のシーラー用水性樹脂組成
物。5. The aqueous resin composition for a sealer according to claim 4, wherein the aqueous adhesive resin is an aqueous urethane resin.
キシ樹脂である請求項４記載のシーラー用水性樹脂組成
物。6. The aqueous resin composition for a sealer according to claim 4, wherein the aqueous adhesive resin is an aqueous epoxy resin.
タン樹脂及び水性エポキシ樹脂が固形分重量比で１：４
〜４：１の混合物である請求項４記載のシーラー用水性
樹脂組成物。7. The aqueous adhesive resin is an aqueous urethane resin and an aqueous epoxy resin in a solid content weight ratio of 1: 4.
The aqueous resin composition for a sealer according to claim 4, which is a mixture of about 4: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001137223A JP2002038130A (en) | 2000-05-15 | 2001-05-08 | Water-based resin composition for sealer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000-142104 | 2000-05-15 | ||
| JP2000142104 | 2000-05-15 | ||
| JP2001137223A JP2002038130A (en) | 2000-05-15 | 2001-05-08 | Water-based resin composition for sealer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002038130A true JP2002038130A (en) | 2002-02-06 |
Family
ID=26591908
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001137223A Pending JP2002038130A (en) | 2000-05-15 | 2001-05-08 | Water-based resin composition for sealer |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114362A (en) * | 2007-11-08 | 2009-05-28 | Fukuoka Packing Kk | Aqueous sealing compound and can for chlorine-based solvent using the same |
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| JPH10298295A (en) * | 1997-04-22 | 1998-11-10 | Du Pont Mitsui Polychem Co Ltd | Aqueous dispersion |
| JPH11158332A (en) * | 1997-11-27 | 1999-06-15 | Mitsui Chem Inc | Aqueous dispersion composition and its production |
| JP2000000519A (en) * | 1998-06-12 | 2000-01-07 | Nkk Corp | Surface-treated steel plate with high white rust resistance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114362A (en) * | 2007-11-08 | 2009-05-28 | Fukuoka Packing Kk | Aqueous sealing compound and can for chlorine-based solvent using the same |
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