JPH0693213A - Rust preventing coating and copper-based glazing coating - Google Patents
Rust preventing coating and copper-based glazing coatingInfo
- Publication number
- JPH0693213A JPH0693213A JP26798292A JP26798292A JPH0693213A JP H0693213 A JPH0693213 A JP H0693213A JP 26798292 A JP26798292 A JP 26798292A JP 26798292 A JP26798292 A JP 26798292A JP H0693213 A JPH0693213 A JP H0693213A
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- JP
- Japan
- Prior art keywords
- water
- paint
- coating
- rust
- synthetic 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、防錆効果を長期間持続
でき且つ作業環境を悪化しない防錆塗料と銅系金属艶出
し塗料に関し、その塗膜の除去が比較的容易である防錆
塗料と銅系金属艶出し塗料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rust preventive paint and a copper-based metal glazing paint which can maintain a rust preventive effect for a long period of time and does not deteriorate the working environment, and its coating film is relatively easy to remove. Paints and copper-based metallic glazing paints.
【０００２】[0002]
【従来の技術】ボルト・ナット，釘，針金などの金属部
品は、加工後に金属生地のままで出荷されることが多
く、この場合にはごく短期間で発錆するので、保管や輸
送に期間を要する場合には錆止め油や錆止めグリースな
どの鉱油類を塗布して一時的に発錆を防いでいる。これ
らの鉱油類は、金属製機器の製造工程における防錆のた
めに塗布されることもある。2. Description of the Related Art Metal parts such as bolts, nuts, nails, and wires are often shipped in the form of metal material after processing. In this case, rusting occurs in a very short period of time. When it is necessary, mineral oils such as rust preventive oil and rust preventive grease are applied to temporarily prevent rusting. These mineral oils may be applied for rust prevention in the manufacturing process of metal equipment.
【０００３】 また、鉄鋼製品の錆止めにはＶＰＩ紙や
ＶＣＩ紙などの防錆紙で包装することがある。この防錆
紙は、亜硫酸ジシクロヘキシルアンモニウムなどの防錆
剤をクラフト紙や純白ロールなどに塗工したものであ
り、包装時に防錆剤が常温で気化して錆止めする。Further, to prevent rust of steel products, rust preventive paper such as VPI paper or VCI paper may be packaged. This rust preventive paper is a kraft paper or pure white roll coated with a rust preventive such as dicyclohexyl ammonium sulfite, and the rust preventive is vaporized at room temperature during packaging to prevent rust.
【０００４】[0004]
【発明が解決しようとする課題】金属部品などに鉱油類
を塗布して一時的に発錆を防いでも、保管に長期間を要
したり湿潤な環境では比較的短期間で発錆し、この金属
部品の発錆や変色による損失は年間では非常に多大であ
る。長期間保管の際の発錆問題は、鉄鋼製品を防錆紙で
包装した場合にもほぼ同様に発生する。Even if mineral oils are applied to metal parts and the like to prevent rusting temporarily, rusting occurs in a relatively short period of time in a storage environment requiring a long period of time or in a humid environment. Loss due to rusting or discoloration of metal parts is extremely large annually. The problem of rusting during long-term storage occurs almost the same when steel products are packed with rustproof paper.
【０００５】 鉱油類を塗布した場合には、次の作業工
程において発火性のないトリクロルエチレンなどの溶剤
で洗浄して鉱油類を除去することが必要である。これら
の溶剤は、使用中に蒸発して臭気を発生するうえに蒸発
による自然損失も大きい。最近では、これらの溶剤の毒
性が問題視され、作業環境を保全するために全面使用禁
止の方向に進みつつある。When the mineral oils are applied, it is necessary to remove the mineral oils by washing with a solvent such as trichlorethylene, which does not ignite in the next working step. These solvents evaporate during use to generate an odor and also have a large natural loss due to evaporation. Recently, the toxicity of these solvents has been regarded as a problem, and in order to preserve the working environment, the use of all solvents is being prohibited.
【０００６】 本発明は、従来の錆止め油や錆止めグリ
ース及び防錆紙に関する前記の問題点を改善するために
提案されたものであり、防錆効果を長期間持続でき且つ
作業環境を悪化しない防錆塗料を提供することを目的と
している。本発明の他の目的は、長期間の防錆効果と同
時に銅本来の光沢を復活させる艶出し塗料を提供するこ
とである。The present invention has been proposed in order to improve the above-mentioned problems associated with conventional rust preventive oils, rust preventive greases, and rust preventive papers, and the rust preventive effect can be maintained for a long period of time without deteriorating the working environment. The purpose is to provide rust paint. Another object of the present invention is to provide a lustrous paint that restores the original luster of copper at the same time as a long-term rust preventive effect.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る防錆塗料は、水を溶媒とする自然乾燥
塗料であって、塗膜主要素として水溶性合成樹脂を使用
し、これにメルカプト基を有する水溶性の有機還元剤を
少量添加している。また、本発明の銅系金属艶出し塗料
も前記の防錆塗料と同様の組成である。In order to achieve the above object, the rust-preventive paint according to the present invention is a natural dry paint using water as a solvent, and uses a water-soluble synthetic resin as a main film element. A small amount of a water-soluble organic reducing agent having a mercapto group is added to this. Further, the copper-based metallic luster paint of the present invention has the same composition as the above-mentioned rust preventive paint.
【０００８】 本発明で用いる水溶性合成樹脂として
は、例えば塗膜が熱水で洗い流せるポリビニルアルコー
ルが好ましい。他の水溶性合成樹脂として、ビニルモノ
マやアクリルエステルなどを乳化重合したラテックスで
あって、ポリ酢酸ビニル、酢酸ビニル共重合体（アクリ
ル，エチレンなど）などの合成ラテックスが例示でき
る。The water-soluble synthetic resin used in the present invention is preferably polyvinyl alcohol whose coating film can be washed off with hot water. Examples of other water-soluble synthetic resins include latexes obtained by emulsion polymerization of vinyl monomers and acrylic esters, and synthetic latexes of polyvinyl acetate, vinyl acetate copolymers (acrylic, ethylene, etc.) can be exemplified.
【０００９】 水溶性合成樹脂には、それ自体が単独で
水に溶解できる合成樹脂と、樹脂を溶かす溶剤を介して
水と混合して希釈できる合成樹脂とを包含する。これら
の合成樹脂として、アクリル樹脂，ポリエステル樹脂，
ポリアミド樹脂，ポリウレタン樹脂，ポリウレタンウレ
ア樹脂又はこれらの混合樹脂などが例示できる。The water-soluble synthetic resin includes a synthetic resin that can be dissolved in water by itself and a synthetic resin that can be diluted by mixing with water through a solvent that dissolves the resin. As these synthetic resins, acrylic resin, polyester resin,
Examples include polyamide resins, polyurethane resins, polyurethane urea resins, and mixed resins thereof.
【００１０】 水溶性合成樹脂に添加するメルカプト基
を有する水溶性の有機還元剤として、β−チオプロピオ
ン酸，チオグリコール酸，チオリンゴ酸，チオグリセリ
ン酸，チオグリセリンなどが使用できる。これらの有機
還元剤は、カルボン酸であればアルカリ塩類にして添加
すると好ましい。As the water-soluble organic reducing agent having a mercapto group added to the water-soluble synthetic resin, β-thiopropionic acid, thioglycolic acid, thiomalic acid, thioglyceric acid, thioglycerin and the like can be used. It is preferable to add these organic reducing agents in the form of alkali salts if they are carboxylic acids.
【００１１】 これらの有機還元剤は、水溶性合成樹脂
がエマルジョンである場合において塗布・乾燥後に水不
溶性になったとしても使用可能である。これらの有機還
元剤は、水溶性合成樹脂が水不溶性に変性した後でも該
樹脂の中に封じ込められた状態になって防錆効果を維持
している。These organic reducing agents can be used even when the water-soluble synthetic resin is an emulsion even if it becomes water-insoluble after coating and drying. Even after the water-soluble synthetic resin is modified to be water-insoluble, these organic reducing agents are kept in the resin and maintain the rust preventive effect.
【００１２】 これらの有機還元剤において、β−チオ
プロピオン酸カルシウムが比較的良好な防錆効果を達成
している。この他のメルカプト基含有の有機還元剤で
も、多少の臭気とか表面の着色を除いてほぼ十分な防錆
効果を達成でき、価格の点では前者よりいっそう優れて
いる。Among these organic reducing agents, β-calcium thiopropionate achieves a relatively good rust preventive effect. Other organic mercapto group-containing reducing agents can achieve a substantially sufficient rust preventive effect except for some odor and coloring of the surface, and are more excellent in price than the former.
【００１３】 本発明の防錆塗料を製造するには、水溶
性合成樹脂を単独又は他の溶媒とともに所定量の水に溶
解し、これに少量の有機還元剤（通常、合成樹脂量の１
／１０以下）を添加するだけでよい。水溶性合成樹脂が
所定量の水に溶けにくい場合には、水を加温したり他の
溶媒を追加してもよい。To produce the rust-preventive coating material of the present invention, a water-soluble synthetic resin is dissolved alone or together with another solvent in a predetermined amount of water, and a small amount of an organic reducing agent (usually 1% of the synthetic resin amount is added thereto).
/ 10 or less). When the water-soluble synthetic resin is difficult to dissolve in a predetermined amount of water, the water may be heated or another solvent may be added.
【００１４】 本発明の防錆塗料は、塗膜主要素が水溶
性合成樹脂であるから、金属表面に塗布・乾燥した後に
その塗膜を使用時に熱水によって簡単に洗い落とすこと
ができる。熱水をどの程度まで加温して使用するかは、
用いる水溶性合成樹脂の重合度，種類及び濃度などによ
って調整すればよい。Since the main component of the coating film of the anticorrosion paint of the present invention is a water-soluble synthetic resin, the coating film can be easily washed off with hot water after use after being applied and dried on the metal surface. How much hot water is heated and used,
It may be adjusted according to the degree of polymerization, type and concentration of the water-soluble synthetic resin used.
【００１５】[0015]
【作用】本発明の防錆塗料では、水溶性合成樹脂に添加
した有機還元剤によって、該水溶性合成樹脂中の酸素を
除去することができる。例えば、チオグリコール酸ナト
リウムは、水溶性合成樹脂中の酸素と次のように反応す
るものと予想できる。 In the anticorrosive paint of the present invention, oxygen in the water-soluble synthetic resin can be removed by the organic reducing agent added to the water-soluble synthetic resin. For example, sodium thioglycolate can be expected to react with oxygen in water-soluble synthetic resins as follows.
【００１６】 したがって、この防錆塗料では、水溶性
合成樹脂つまり塗膜中の酸素によって金属表面が酸化さ
れて錆びることがなく、磨いた金属表面のままで長期間
保存することができる。また、塗膜中に残存する還元剤
が、塗膜内へ侵入してくる空気中の酸素と反応していっ
そう防錆効果を上げる。Therefore, in this anticorrosive paint, the metal surface is not oxidized and rusted by the water-soluble synthetic resin, that is, oxygen in the coating film, and the metal surface can be stored as it is for a long time. Further, the reducing agent remaining in the coating film reacts with oxygen in the air entering the coating film to further enhance the rust preventive effect.
【００１７】 表面が酸化などで変色した銅又は銅合金
からなる製品では、本発明の艶出し塗料を金属表面に塗
布すると、その還元作用によって元の鮮やかな銅色を回
復することができる。この塗布部分の光沢は、長期間放
置後においても全く変化せず、鮮やかな銅色を保ってい
る。In the case of a product made of copper or a copper alloy whose surface is discolored by oxidation or the like, when the glazing paint of the present invention is applied to a metal surface, the original bright copper color can be restored by its reducing action. The gloss of this coated portion does not change even after being left for a long period of time, and maintains a bright copper color.
【００１８】[0018]
【実施例】次に、本発明を実施例に基づいて説明する。 実施例１ 重合度２０００のポリビニルアルコール１０ｇを１００
ｃｍ3の熱水に溶解する。この中にβ−チオプロピオン
酸カルシウム０.７ｇを添加して防錆塗料を得る。EXAMPLES Next, the present invention will be explained based on examples. Example 1 100 g of polyvinyl alcohol having a polymerization degree of 2000
Dissolve in cm 3 hot water. 0.7 g of calcium β-thiopropionate is added to this to obtain an anticorrosive paint.
【００１９】 表面が酸化などでかなり変色した銅板に
この防錆塗料を塗布する。この結果、銅板表面の塗布し
た部分は、この防錆塗料の還元作用によって元の鮮やか
な銅色を回復し、金属艶出し塗料としても十分使用でき
る。この塗布部分は、１ヵ月放置後においても全く変化
せず、鮮やかな銅色を保っているが、塗布していない部
分は変色が進行して表面が汚くなる。This rust-preventive paint is applied to a copper plate whose surface is considerably discolored due to oxidation or the like. As a result, the applied portion of the copper plate surface restores the original bright copper color due to the reducing action of the rust preventive paint, and can be sufficiently used as a metallic polish paint. This coated portion does not change even after being left for one month and maintains a bright copper color, but the uncoated portion undergoes discoloration and the surface becomes dirty.
【００２０】実施例２ 重合度２０００のポリビニルアルコール１０ｇを１００
ｃｍ3の熱水に溶解する。この中にチオリンゴ酸アンモ
ニウム１ｇを添加して防錆塗料を得る。Example 2 10 g of polyvinyl alcohol having a degree of polymerization of 2000 was added to 100
Dissolve in cm 3 hot water. To this, 1 g of ammonium thiomalate was added to obtain an anticorrosive paint.
【００２１】 得た防錆塗料を良く磨いた鉄板に部分的
に塗布して自然乾燥させ、風通しの良い窓際において１
ヵ月間吊り下げる。１ヵ月後において、この防錆塗料を
塗布していない部分には著しく錆が発生したが、塗布部
分には全く発錆せず、元の磨いた状態を完全に維持して
いる。The obtained rust-preventive paint was partially applied to a well-polished iron plate and naturally dried, and then the rust-preventive paint 1
Suspend for a month. After one month, rust was remarkably generated in the part not coated with the anticorrosive paint, but the coated part was not rusted at all, and the original polished state was completely maintained.
【００２２】実施例３ 重合度１５００のポリビニルアルコール１０ｇを１００
ｃｍ3の熱水に溶解する。この中にチオグリコール酸カ
ルシウム１ｇを添加して防錆塗料を得る。Example 3 10 g of polyvinyl alcohol having a degree of polymerization of 1500 was added to 100
Dissolve in cm 3 hot water. To this, 1 g of calcium thioglycolate is added to obtain an anticorrosive paint.
【００２３】 得た防錆塗料を良く磨いた鉄板に部分的
に塗布して自然乾燥させ、風通しの良い窓際において２
ヵ月間吊り下げる。２ヵ月後において、この防錆塗料を
塗布していない部分には著しく錆が発生したが、塗布部
分には全く発錆せずに元の磨いた状態を維持して防錆効
果が顕著である。The obtained rust-preventive paint was partially applied to a well-polished iron plate, and naturally dried, and then placed in a well-ventilated window for 2
Suspend for a month. Two months later, significant rusting occurred in the part not coated with this anticorrosive paint, but the original polished state was maintained without any rusting in the coated part and the rustproofing effect was remarkable. .
【００２４】実施例４ 重合度１７００のポリビニルアルコール１０ｇを１００
ｃｍ3の熱水に溶解する。この中にチオグリセリン１ｇ
を添加して防錆塗料を得る。Example 4 10 g of polyvinyl alcohol having a degree of polymerization of 1700 was added to 100
Dissolve in cm 3 hot water. 1g of thioglycerin in this
To obtain an anticorrosive paint.
【００２５】 得た防錆塗料を真鍮板に塗布して自然乾
燥させ、実験室内において２ヵ月間放置する。２ヵ月後
において、この防錆塗料を塗布していない部分には著し
く錆が発生したが、塗布部分には全く発錆せず、元の磨
いた状態を維持している。The obtained rust-preventive paint is applied to a brass plate, naturally dried, and allowed to stand in a laboratory for 2 months. After two months, rust was remarkably generated on the part not coated with the anticorrosive paint, but the coated part was not rusted at all, and the original polished state was maintained.
【００２６】[0026]
【発明の効果】本発明の防錆塗料は、ボルト・ナット，
釘，針金などの金属部品又は各種の鉄鋼製品に塗布する
と、数か月に亘って発錆を効果的に防止できる。この防
錆塗料は、錆止め油や錆止めグリースなどの鉱油類を塗
布したり、ＶＰＩ紙やＶＣＩ紙などの防錆紙で包装する
する場合に比べて遥かに長期間防錆効果が持続し、金属
製品の発錆や変色による多大の損失を未然に防止でき
る。The anticorrosive paint of the present invention is used for bolts, nuts,
When applied to metal parts such as nails and wires or various steel products, rust can be effectively prevented for several months. This anticorrosion paint has a long-lasting anticorrosion effect as compared with the case where mineral oils such as antirust oil and antirust grease are applied, or packaging is performed with antirust paper such as VPI paper and VCI paper. It is possible to prevent a large loss due to rusting or discoloration of the product.
【００２７】 本発明の防錆塗料は、低コストの水溶性
合成樹脂を塗膜主要素として使用しているので、鉱油類
や防錆紙に比べると非常に安価であり、加工後に金属生
地のままで出荷する場合と比べても大した出費にならな
い。特に自動車，車両，電気洗濯機，冷蔵庫外板用の薄
鋼板のように、防錆がきわめて重要であって錆止め鉱油
類の使用量が非常に多い場合に有益である。The anticorrosive paint of the present invention uses a low-cost water-soluble synthetic resin as a main component of the coating film, so that it is very inexpensive as compared with mineral oils and anticorrosive paper, and after processing it can be applied to metal fabrics. It does not cost much compared to shipping until now. This is especially useful when rust prevention is extremely important and the amount of rust preventive mineral oil used is very large, such as thin steel sheets for automobiles, vehicles, electric washing machines, and refrigerator outer panels.
【００２８】 本発明の防錆塗料の塗膜は、使用時に熱
水で簡単に洗い落とすことができ、錆止め鉱油類などの
ように溶剤で洗浄して除去する必要は全くない。このた
め、この防錆塗料を除去する際には、溶剤蒸発による臭
気発生及び自然損失というような環境悪化やコスト上昇
の要因がなく、溶剤のように毒性が問題視されることも
ない。The coating film of the rust preventive paint of the present invention can be easily washed off with hot water at the time of use, and it is not necessary to remove it by washing with a solvent like rust preventive mineral oils. Therefore, when removing the anticorrosion paint, there is no environmental deterioration such as odor generation and natural loss due to solvent evaporation and cost increase, and toxicity is not a problem like a solvent.
【００２９】 また、本発明の銅系金属艶出し塗料は、
表面が酸化などで変色した銅又は銅合金の金属製品を防
錆と同時に金属本来の光沢を復活させる。この艶出し塗
料は、金属製品の艶出しために別個の薬剤及び処理を必
要としないから、防錆及び艶出しを同時に行なう際の作
業時間とコストに関してきわめて有利である。Further, the copper-based metallic luster paint of the present invention is
Prevents corrosion of metal products made of copper or copper alloys whose surface is discolored due to oxidation and restores the original luster of the metal. This glazing paint does not require a separate chemical agent and treatment for glazing metal products, and thus is extremely advantageous in terms of working time and cost for simultaneous rust prevention and glazing.
Claims (3)
塗膜主要素として水溶性合成樹脂を使用し、これにメル
カプト基を有する水溶性の有機還元剤を添加する防錆塗
料。1. A natural dry paint using water as a solvent,
A rust preventive paint that uses a water-soluble synthetic resin as a main component of a coating film and adds a water-soluble organic reducing agent having a mercapto group thereto.
塗膜主要素として水溶性合成樹脂を使用し、これにメル
カプト基を有する水溶性の有機還元剤を添加する銅系金
属艶出し塗料。2. A natural dry paint using water as a solvent,
A copper-based metallic glaze paint in which a water-soluble synthetic resin is used as a main component of a coating film, and a water-soluble organic reducing agent having a mercapto group is added thereto.
ルカプト基を有する水溶性の有機還元剤とを含有する防
錆塗料又は艶出し塗料を金属表面に塗布・乾燥した後
に、その塗膜を使用時に熱水によって洗い落とす防錆塗
料又は艶出し塗料の除去方法。3. A metal surface is coated with a rust-preventive paint or a polish paint containing a water-soluble synthetic resin and a water-soluble organic reducing agent having a mercapto group as main constituents of the coating film, and the coating film is dried. A method of removing rust-preventive paint or polish paint that is washed off with hot water at the time of use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26798292A JPH0693213A (en) | 1992-09-09 | 1992-09-09 | Rust preventing coating and copper-based glazing coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26798292A JPH0693213A (en) | 1992-09-09 | 1992-09-09 | Rust preventing coating and copper-based glazing coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0693213A true JPH0693213A (en) | 1994-04-05 |
Family
ID=17452272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26798292A Pending JPH0693213A (en) | 1992-09-09 | 1992-09-09 | Rust preventing coating and copper-based glazing coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0693213A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2331106A (en) * | 1997-11-05 | 1999-05-12 | Polyval Plc | Use of polyvinyl alcohol as rust remover |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5063020A (en) * | 1973-10-06 | 1975-05-29 | ||
| JPS529030A (en) * | 1975-07-11 | 1977-01-24 | Dainippon Toryo Co Ltd | Water-based resin composition for tentative corrosionproofing |
| JPS5331737A (en) * | 1976-09-07 | 1978-03-25 | Toshiba Corp | Water-soluble corrosion-resistant paint |
| JPS548642A (en) * | 1977-06-21 | 1979-01-23 | Kansai Paint Co Ltd | Improvement in anticorrosion of electrodeposit coating film |
| JPS5454150A (en) * | 1977-10-06 | 1979-04-28 | Shinto Paint Co Ltd | Corrosionnresistant aqueous coating composition |
| JPS54113634A (en) * | 1978-02-27 | 1979-09-05 | Hitachi Ltd | Electrodeposition liquid composition |
| JPH0198668A (en) * | 1987-10-13 | 1989-04-17 | Hitachi Chem Co Ltd | Resin composition |
| JPH04234463A (en) * | 1990-08-29 | 1992-08-24 | Atochem North America Inc | Composition and method for treating metal with water-retentive polymer film |
-
1992
- 1992-09-09 JP JP26798292A patent/JPH0693213A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5063020A (en) * | 1973-10-06 | 1975-05-29 | ||
| JPS529030A (en) * | 1975-07-11 | 1977-01-24 | Dainippon Toryo Co Ltd | Water-based resin composition for tentative corrosionproofing |
| JPS5331737A (en) * | 1976-09-07 | 1978-03-25 | Toshiba Corp | Water-soluble corrosion-resistant paint |
| JPS548642A (en) * | 1977-06-21 | 1979-01-23 | Kansai Paint Co Ltd | Improvement in anticorrosion of electrodeposit coating film |
| JPS5454150A (en) * | 1977-10-06 | 1979-04-28 | Shinto Paint Co Ltd | Corrosionnresistant aqueous coating composition |
| JPS54113634A (en) * | 1978-02-27 | 1979-09-05 | Hitachi Ltd | Electrodeposition liquid composition |
| JPH0198668A (en) * | 1987-10-13 | 1989-04-17 | Hitachi Chem Co Ltd | Resin composition |
| JPH04234463A (en) * | 1990-08-29 | 1992-08-24 | Atochem North America Inc | Composition and method for treating metal with water-retentive polymer film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2331106A (en) * | 1997-11-05 | 1999-05-12 | Polyval Plc | Use of polyvinyl alcohol as rust remover |
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