JP2006097023A - Rust preventive pigment containing composite hydroxide of calcium and specific metal - Google Patents

Rust preventive pigment containing composite hydroxide of calcium and specific metal Download PDF

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JP2006097023A
JP2006097023A JP2005274678A JP2005274678A JP2006097023A JP 2006097023 A JP2006097023 A JP 2006097023A JP 2005274678 A JP2005274678 A JP 2005274678A JP 2005274678 A JP2005274678 A JP 2005274678A JP 2006097023 A JP2006097023 A JP 2006097023A
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calcium
rust preventive
composite hydroxide
specific metal
preventive pigment
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Yasuhiro Hidaka
靖浩 日高
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YHS KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a new rust preventive pigment containing a composite hydroxide of calcium and a specific metal, and having a rust preventive activity equal to a lead-based or chromium-based pigment while keeping the safety as a pollution-free rust preventive pigment; and to provide a rust preventive coating material. <P>SOLUTION: The rust preventive pigment containing the composite hydroxide of the calcium and the specific metal not only is pollution free but also exhibits the rust preventive activity equal to a lead-based rust preventive pigment-containing coating material when being formulated with a coating material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、カルシウムと特定の金属との複合水酸化物を含有する防錆顔料に関する。  The present invention relates to a rust preventive pigment containing a composite hydroxide of calcium and a specific metal.

防錆塗料には、従来防錆顔料として鉛、クロムなど人体、環境に影響を及ぼす重金属化合物が多用されてきたが、近年安全性重視の観点から、より安全性の高い、無公害型防錆顔料への転換が進められている。これらのなかではリン酸亜鉛、縮合リン酸アルミニウム、亜リン酸亜鉛、亜リン酸カルシウム、モリブデン酸亜鉛等が、シアナミド鉛やクロム酸ストロンチウム、クロム酸亜鉛等の鉛系やクロム系に代わる防錆顔料として多用化されつつある。  In the past, heavy metal compounds that affect the human body and the environment, such as lead and chromium, have been frequently used as anticorrosive pigments in anticorrosion paints. Conversion to pigments is ongoing. Among these, zinc phosphate, condensed aluminum phosphate, zinc phosphite, calcium phosphite, zinc molybdate, etc. are used as anticorrosive pigments to replace lead-based and chromium-based materials such as cyanamide lead, strontium chromate and zinc chromate. It is being diversified.

しかしこれらの無公害型防錆顔料は、鉛系やクロム系に比べて安全性は改善されているものの、防錆力が十分とはいえないという問題があった。従って無公害型の安全性を維持しながら、鉛系やクロム系の防錆力をもつ新しい無公害型防錆顔料、防錆塗料の開発が望まれていた。  However, these non-polluting rust preventive pigments have improved safety compared to lead-based and chrome-based pigments, but have a problem that the rust-preventing power is not sufficient. Accordingly, it has been desired to develop a new non-pollution type rust preventive pigment and rust preventive paint having lead-type and chromium-type rust-preventing power while maintaining non-pollution type safety.

本発明者は、安全性の高い金属であるカルシウムと亜鉛、アルミニウムのなかの1種の金属との複合水酸化物が、塗料に配合したとき、防錆顔料としてシアナミド鉛に匹敵する防錆力を有することを見出し、本発明を完成した。
すなわち、本発明は、
(1)下記一般式(I)
Ca(OH)・xM(OH)・nHO (I)
(式中xは1/2<x<3を満足する正数、Mは亜鉛からなる2価金属、またはアルミニウムからなる3価金属、yは、Mが2価金属のときは2を、3価金属のときは3を、nは0≦n<3を満足する正数を表す。)
で示されるカルシウムと特定の金属との複合水酸化物を含有することを特徴とする防錆顔料、
(2)下記一般式(I)
Ca(OH)・xM(OH)・nHO (I)
(式中xは1/2<x<3を満足する正数、Mは亜鉛からなる2価金属、またはアルミニウムからなる3価金属、yは、Mが2価金属のときは2を、3価金属のときは3を、nは0≦n<3を満足する正数を表す。)
で示されるカルシウムと特定の金属との複合水酸化物と酸化珪素、珪酸カルシウム、珪酸亜鉛および珪酸アルミニウムからなる珪素化合物の1種以上を含み、その10%水懸濁液がpH9〜12の範囲にあることを特徴とする防錆顔料、
である。
The present inventor found that when a composite hydroxide of calcium, zinc, which is a highly safe metal, and one kind of metal among aluminum is blended in a paint, the anticorrosive ability is comparable to cyanamide lead as a rust preventive pigment. The present invention was completed.
That is, the present invention
(1) The following general formula (I)
Ca (OH) 2 xM (OH) y nH 2 O (I)
(Wherein x is a positive number satisfying 1/2 <x <3, M is a divalent metal made of zinc or a trivalent metal made of aluminum, y is 2 when M is a divalent metal, 3 3 represents a valent metal, and n represents a positive number satisfying 0 ≦ n <3.)
A rust preventive pigment characterized by containing a composite hydroxide of calcium and a specific metal represented by
(2) The following general formula (I)
Ca (OH) 2 xM (OH) y nH 2 O (I)
(Wherein x is a positive number satisfying 1/2 <x <3, M is a divalent metal made of zinc or a trivalent metal made of aluminum, y is 2 when M is a divalent metal, 3 3 represents a valent metal, and n represents a positive number satisfying 0 ≦ n <3.)
And a compound hydroxide of calcium and a specific metal and at least one silicon compound composed of silicon oxide, calcium silicate, zinc silicate and aluminum silicate, and a 10% aqueous suspension having a pH of 9 to 12 Anti-rust pigments, characterized in that
It is.

本発明の一般式(I)で示されるカルシウムと特定の金属との複合水酸化物は、白色結晶性粉末で、上記複合水酸化物を構成する各金属当りほぼ当量の水酸化カルシウムまたは酸化カルシウムと特定金属の水酸化物または酸化物を必要によりアルカリの存在下水媒体で40〜100℃、好ましくは60〜100℃で1〜72時間、好ましくは4〜48時間攪拌下に反応させ、反応液をろ過した後、得られた固体を水洗後50〜100℃で乾燥することによって得られる。例えば、特定の金属が亜鉛の場合、亜鉛酸塩を形成させるため、水酸化カリウム、水酸化ナトリウムのようなアルカリの存在下で反応させる必要があるが、特定の金属がアルミニウムの場合必要としない。  The composite hydroxide of calcium and a specific metal represented by the general formula (I) of the present invention is a white crystalline powder, and approximately equivalent amount of calcium hydroxide or calcium oxide for each metal constituting the composite hydroxide. If necessary, the hydroxide or oxide of the specific metal is reacted in an aqueous medium in the presence of an alkali at 40 to 100 ° C., preferably 60 to 100 ° C. for 1 to 72 hours, preferably 4 to 48 hours with stirring. The solid obtained is washed with water and dried at 50 to 100 ° C. For example, when the specific metal is zinc, it is necessary to react in the presence of an alkali such as potassium hydroxide or sodium hydroxide in order to form a zincate, but this is not necessary when the specific metal is aluminum. .

このようにして得られたカルシウムと特定金属との複合水酸化物は、水に懸濁すると、徐々に加水分解し、水酸化カルシウムと他方の金属の水酸化物に分解する。このとき水懸濁液は、若干水可溶性の水酸化カルシウムの溶出によって、アルカリ性を示す。防錆顔料として適当な本発明の複合水酸化物が水懸濁液中で示すpH値は9から12の間である。pH値が9以下のときは、十分な防錆力が発揮されず、pH値が12以上のときは、塗膜のブリスターの原因となる。従って本発明のカルシウムと特定金属との複合水酸化物を含有する防錆顔料を塗料に配合するとき、塗装後の塗膜中のpH値が9〜12の範囲に維持されることが重要である。  When the calcium hydroxide and the specific metal complex hydroxide thus obtained are suspended in water, they are gradually hydrolyzed and decomposed into calcium hydroxide and the other metal hydroxide. At this time, the water suspension exhibits alkalinity due to the elution of slightly water-soluble calcium hydroxide. The pH value of the composite hydroxide of the present invention, which is suitable as an anticorrosive pigment, in the aqueous suspension is between 9 and 12. When the pH value is 9 or less, sufficient rust preventive power is not exhibited, and when the pH value is 12 or more, it causes blistering of the coating film. Therefore, when the anticorrosive pigment containing the composite hydroxide of calcium and the specific metal of the present invention is blended in the paint, it is important that the pH value in the coated film is maintained in the range of 9-12. is there.

上述したように、限度以上の水酸化カルシウムを含んでいると、その水可溶性と浸透圧の高さの故に塗料のブリスター、剥がれの原因になるが、これを避けるために上記カルシウムと特定の金属との複合水酸化物に酸化珪素、珪酸カルシウム、珪酸亜鉛および珪酸アルミニウムからなる珪素化合物の1種以上を含有させることが好ましい。水難溶性の酸化珪素または珪酸塩が存在すると、カルシウムと特定の金属との複合水酸化物の表面が被覆されるか、またはカルシウムと特定の金属との複合水酸化物と新たな複合化合物を生成させる結果、塗料中で無機、あるいは有機イオンを含む水が侵入してきても、カルシウムと特定の金属との複合水酸化物の加水分解による水酸化カルシウムの急激な溶出が抑制される。その調節は、カルシウムと特定の金属との複合水酸化物を含有する顔料の10%水懸濁液におけるpH値を測定することにより可能である。上記9〜12のpH条件を満足する酸化珪素または珪酸塩の顔料への添加量は、カルシウムと特定の金属との複合水酸化物中のカルシウム含量によるが、一般に酸化珪素(SiO)として0.5〜15%の範囲が好適である。As mentioned above, if calcium hydroxide exceeding the limit is included, it will cause blistering and peeling of the paint due to its high water solubility and high osmotic pressure. It is preferable to contain at least one silicon compound composed of silicon oxide, calcium silicate, zinc silicate and aluminum silicate in the composite hydroxide. In the presence of poorly water-soluble silicon oxide or silicate, the surface of the composite hydroxide of calcium and a specific metal is coated, or a new composite compound of calcium and a specific metal is formed. As a result, even if water containing inorganic or organic ions invades in the paint, rapid elution of calcium hydroxide due to hydrolysis of a composite hydroxide of calcium and a specific metal is suppressed. The adjustment is possible by measuring the pH value in a 10% aqueous suspension of a pigment containing a composite hydroxide of calcium and a specific metal. The amount of silicon oxide or silicate added to the pigment satisfying the pH conditions of 9 to 12 depends on the calcium content in the composite hydroxide of calcium and a specific metal, but is generally 0 as silicon oxide (SiO 2 ). A range of 0.5-15% is preferred.

本発明のカルシウムと特定金属の複合水酸化物を含有する防錆顔料、又は必要によりこれに酸化珪素または珪酸塩を添加した防錆顔料は、塗料に単独使用の場合、3〜20重量%、好ましくは5〜10重量%配合される。また他の防錆顔料と組み合わせて用いられる場合も、防錆顔料の合計で3〜20重量%、好ましくは5〜10重量%配合される。  The rust preventive pigment containing a composite hydroxide of calcium and a specific metal of the present invention, or a rust preventive pigment to which silicon oxide or silicate is added if necessary, is 3 to 20% by weight when used alone in a paint, Preferably 5 to 10 weight% is mix | blended. When used in combination with other antirust pigments, the total amount of antirust pigments is 3 to 20% by weight, preferably 5 to 10% by weight.

本発明のカルシウムと特定の金属の複合水酸化物を含有する防錆塗料は、バインダー、カルシウムと特定の金属の複合水酸化物を含有する防錆顔料、又は必要によりこれに酸化珪素または珪酸塩を添加した防錆顔料、又はリン酸塩、縮合リン酸塩、亜リン酸塩の1種以上との組み合わせからなる防錆顔料、溶媒、体質顔料、必要により着色顔料、粘度調整剤、沈降防止剤、たれ防止剤等の配合原料を合わせて、混合機、分散機等で均一に混合して製せられる。これらの原料を配合して製せられた防錆塗料は、ロールコーター、エアスプレー法、バーコーター、刷毛、浸漬等によって被塗物に塗装される。  The anticorrosive paint containing a composite hydroxide of calcium and a specific metal according to the present invention includes a binder, an anticorrosive pigment containing a composite hydroxide of calcium and a specific metal, or, if necessary, silicon oxide or silicate. Rust preventive pigment added with rust preventive pigment consisting of a combination of one or more of phosphate, condensed phosphate and phosphite, solvent, extender pigment, if necessary color pigment, viscosity modifier, settling prevention The blended raw materials such as the agent and the anti-sagging agent are combined and uniformly mixed with a mixer, a disperser or the like. The anticorrosive paint produced by blending these raw materials is applied to the object by roll coater, air spray method, bar coater, brush, dipping or the like.

本発明のカルシウムと特定の金属の複合水酸化物を含有する防錆塗料が塗付される被塗物としては、例えば冷延鋼板、亜鉛めっき鋼板、亜鉛/アルミニウム合金めっき鋼板、アルミニウムめっき鋼板、アルミニウム板等が挙げられる。  Examples of the object to be coated with the anticorrosive paint containing calcium and a specific metal composite hydroxide of the present invention include, for example, a cold rolled steel sheet, a galvanized steel sheet, a zinc / aluminum alloy plated steel sheet, an aluminum plated steel sheet, An aluminum plate etc. are mentioned.

本発明の防錆塗料に用いられるバインダーとしては、例えば長油アルキッド、中油アルキッド、水溶性アルキッド、フェノール修飾短油アルキッド、アルキッドアクリル、アルキッドメラミン、アクリル、アクリルフェノール、アクリルスチレン、アクリルメラミン、イソシアネート硬化型アクリル、ウレタン、アクリルウレタン、ポリエステル、変性ポリエステル、エポキシ、エポキシウレタン、ポリアミドエポキシ、変性エポキシ、アクリルエポキシ、酸無水物変性ポリプロピレン等の各樹脂が挙げられる。  Examples of the binder used in the anticorrosive paint of the present invention include long oil alkyd, medium oil alkyd, water-soluble alkyd, phenol-modified short oil alkyd, alkyd acrylic, alkyd melamine, acrylic, acrylic phenol, acrylic styrene, acrylic melamine, and isocyanate curing. Examples include resins such as type acrylic, urethane, acrylic urethane, polyester, modified polyester, epoxy, epoxy urethane, polyamide epoxy, modified epoxy, acrylic epoxy, and acid anhydride modified polypropylene.

本発明のカルシウムと特定の金属の複合水酸化物、及び必要により酸化珪素または珪酸塩からなる防錆顔料と組み合わせて用いられる好適な防錆顔料としては、亜鉛、カルシウム等のリン酸塩、亜鉛、アルミニウム、カルシウム等の縮合リン酸塩、亜鉛、カルシウム、アルミニウム等の亜リン酸塩(複合塩を含む)が挙げられる。
これらのなかでは特にリン酸亜鉛、縮合リン酸アルミニウム、亜リン酸亜鉛、亜リン酸カルシウムが好ましい。
Examples of suitable rust preventive pigments used in combination with calcium hydroxide of the present invention and a composite hydroxide of a specific metal, and if necessary, a rust preventive pigment made of silicon oxide or silicate include phosphates such as zinc and calcium , Condensed phosphates such as aluminum and calcium, and phosphites (including complex salts) such as zinc, calcium and aluminum.
Among these, zinc phosphate, condensed aluminum phosphate, zinc phosphite, and calcium phosphite are particularly preferable.

本発明のカルシウムと特定の金属の複合水酸化物、及び必要により酸化珪素または珪酸塩からなる防錆顔料を含む防錆塗料に、所望によりさらにリン酸塩、縮合リン酸塩、亜リン酸塩以外の防錆顔料を加えることもできる。これらの防錆顔料としては、モリブデン酸の亜鉛塩、カルシウム塩、アルミニウム塩、リンモリブデン酸の亜鉛塩、アルミニウム塩、シアナミド亜鉛、ホウ酸のバリウム塩、カルシウム塩、シリカ系イオン交換体、珪酸カルシウム、リン珪酸カルシウム亜鉛、ホウ珪酸カルシウム、炭酸型ハイドロタルサイト、亜硝酸またはタングステン酸イオン交換ハイドロタルサイト、亜硝酸イオン交換ハイドロカルマイト等が挙げられる。  The anti-corrosion paint containing a calcium hydroxide and a specific metal complex hydroxide of the present invention and, if necessary, an anti-rust pigment made of silicon oxide or silicate, and optionally further phosphate, condensed phosphate, phosphite Other anti-corrosion pigments can also be added. These antirust pigments include zinc salts of molybdic acid, calcium salts, aluminum salts, zinc salts of phosphomolybdic acid, aluminum salts, cyanamide zinc, barium salts of boric acid, calcium salts, silica-based ion exchangers, calcium silicates , Calcium zinc silicate, calcium borosilicate, carbonated hydrotalcite, nitrous acid or tungstate ion exchange hydrotalcite, nitrite ion exchange hydrocalumite and the like.

本発明の防錆塗料には、バインダー、防錆顔料以外に主要成分として体質顔料および溶媒が含まれるが、体質顔料として例えば酸化チタン、酸化亜鉛、炭酸カルシウム、硫酸バリウム、タルク、カオリンクレー等が、溶媒として例えばキシレン、ミネラルスピリット、オイルターペン等が用いられる。防錆塗料としての代表的な組成としては、特に限定されるものではないが、以下の組成が挙げられる。
(1)本発明のカルシウムと特定の金属の複合水酸化物を含有する防錆顔料:5〜10重 量%
(2)他の防錆顔料:0〜5%
(3)バインダー(固形物換算):20〜30重量%
(4)溶媒:30〜50重量%
(5)体質顔料他:25〜35重量%
The anti-corrosion paint of the present invention contains extender pigments and solvents as main components in addition to the binder and anti-rust pigments. Examples of extender pigments include titanium oxide, zinc oxide, calcium carbonate, barium sulfate, talc, and kaolin clay. As the solvent, for example, xylene, mineral spirit, oil turpentine and the like are used. Although it does not specifically limit as a typical composition as an antirust coating, The following compositions are mentioned.
(1) Rust preventive pigment containing composite hydroxide of calcium and specific metal of the present invention: 5 to 10% by weight
(2) Other rust preventive pigments: 0 to 5%
(3) Binder (solid matter conversion): 20 to 30% by weight
(4) Solvent: 30-50% by weight
(5) extender pigments, etc .: 25 to 35% by weight

本発明の一般式(I)で示されるカルシウムと特定の金属の複合水酸化物を含有する防錆顔料は、無公害性であるうえに、塗料に配合されたとき、公害が問題視されている鉛系防錆顔料に匹敵する防錆効力を示す。  The rust preventive pigment containing a composite hydroxide of calcium and a specific metal represented by the general formula (I) of the present invention is non-polluting, and when blended in a paint, pollution is regarded as a problem. Rust preventive effect comparable to lead-based anticorrosive pigments.

以下に実施例を示して、本発明を具体的に説明する。  The present invention will be specifically described below with reference to examples.

カルシウムと亜鉛の複合水酸化物を含有する防錆顔料の合成
水酸化カリウム11.5gを含む水溶液50mLに、酸化亜鉛16.3g、水酸化カルシウム7.4gを加え、60〜65℃に加温して、その温度を保ちながら、24時間攪拌し、反応させた。冷却後ろ過して得た固体を100mLの精製水で水洗し、再ろ過後再び固体を100mLの精製水で水洗し、再々ろ過した。60℃で4時間乾燥後得た固体は、白色結晶性粉末で、得量は26.4gであった。このもののX線回折分析から、主成分は、Ca〔Zn(OH)・2HO、副成分は未反応の酸化亜鉛であることを確認した。X線回折チャートを図1に示す。
Synthesis of rust preventive pigment containing composite hydroxide of calcium and zinc To 50 mL of aqueous solution containing 11.5 g of potassium hydroxide, 16.3 g of zinc oxide and 7.4 g of calcium hydroxide are added and heated to 60 to 65 ° C. Then, while maintaining the temperature, the mixture was stirred for 24 hours to be reacted. The solid obtained by cooling after cooling was washed with 100 mL of purified water, and after refiltration, the solid was again washed with 100 mL of purified water and filtered again. The solid obtained after drying at 60 ° C. for 4 hours was a white crystalline powder, and the yield was 26.4 g. From the X-ray diffraction analysis of this product, it was confirmed that the main component was Ca [Zn (OH) 3 ] 2 .2H 2 O and the subcomponent was unreacted zinc oxide. An X-ray diffraction chart is shown in FIG.

カルシウムとアルミニウムの複合水酸化物を含有する防錆顔料の合成
水酸化カルシウム22.2gを300mLの水に懸濁させ、95℃に加熱した。これに水酸化アルミニウム15.6gを少量ずつ加え、温度を95〜100℃に保って、6時間攪拌し、反応させた。冷却後ろ過して得た固体を200mLの精製水に戻して洗い、再ろ過後固体をさらに100mLの精製水で水洗し、再々ろ過した。ろ過物を60℃で4時間乾燥して、35.7gの白色結晶性粉末を得た。このもののX線回折分析から、主成分は3Ca(OH)・2Al(OH)であることを確認した。X線回折チャートを図2に示す。
Synthesis of rust preventive pigment containing composite hydroxide of calcium and aluminum 22.2 g of calcium hydroxide was suspended in 300 mL of water and heated to 95 ° C. To this, 15.6 g of aluminum hydroxide was added little by little, and the temperature was kept at 95 to 100 ° C., and the mixture was stirred for 6 hours to be reacted. After cooling, the solid obtained by filtration was washed back into 200 mL of purified water, and after refiltration, the solid was further washed with 100 mL of purified water and filtered again. The filtrate was dried at 60 ° C. for 4 hours to obtain 35.7 g of white crystalline powder. From the X-ray diffraction analysis of this product, it was confirmed that the main component was 3Ca (OH) 2 .2Al (OH) 3 . An X-ray diffraction chart is shown in FIG.

カルシウムとアルミニウムの複合水酸化物に酸化珪素を添加した防錆顔料の調製
実施例2で得られたカルシウムとアルミニウムの複合水酸化物の白色結晶性粉末9.0gと非晶質シリカ(東ソーシリカ工業株式会社製「ニップシールER」)1.0gを200mLビーカーに入れて水90.0gを加え、60℃で30分攪拌した。得られた水懸濁液を冷却後ろ過して、60℃4時間乾燥し、9.9gの白色粉末を得た。
Preparation of anticorrosive pigment in which silicon oxide is added to calcium hydroxide and aluminum composite hydroxide 9.0 g white crystalline powder of calcium hydroxide and aluminum composite hydroxide obtained in Example 2 and amorphous silica (Tosoh silica) Industrial Co., Ltd. "Nip seal ER") 1.0g was put into a 200 mL beaker, water 90.0g was added, and it stirred at 60 degreeC for 30 minutes. The resulting aqueous suspension was cooled and then filtered and dried at 60 ° C. for 4 hours to obtain 9.9 g of white powder.

10%水懸濁液でのpH値
実施例1で得られたカルシウムと亜鉛との複合水酸化物からなる防錆顔料、実施例2で得られたカルシウムとアルミニウムとの複合水酸化物からなる防錆顔料、および実施例3で得られた非晶質シリカ添加カルシウムとアルミニウムとの複合水酸化物からなる防錆顔料について、10%水懸濁液でのpH値、および水に対する溶解度を測定した。測定結果を表1に示す。
測定法;
(1)pH値
JIS K 0102による。水は超純水を用い、機器としては(株)堀場製作所製 pH/Ion meter F−23を使用した。
(2)水に対する溶解度
試料0.1gに超純水を加え、全体量を500mLとし、20℃の温度で24時間攪拌した。これをろ過後、ろ液を10倍に希釈し、原子吸光分析を行い、Caの定量を行った。Caの定量値から防錆顔料の水に対する溶解度を算出した。分析機器としては、セイコー電子工業(株)製原子吸光分光光度計SAS−7500を使用した。
PH value in 10% aqueous suspension Rust preventive pigment composed of composite hydroxide of calcium and zinc obtained in Example 1, and composed of composite hydroxide of calcium and aluminum obtained in Example 2 For the rust preventive pigment and the rust preventive pigment made of the composite hydroxide of amorphous silica-added calcium and aluminum obtained in Example 3, the pH value in 10% water suspension and the solubility in water were measured. did. The measurement results are shown in Table 1.
Measurement method;
(1) According to pH value JIS K 0102. Ultra pure water was used as the water, and pH / Ion meter F-23 manufactured by Horiba, Ltd. was used as the equipment.
(2) Solubility in water Ultrapure water was added to 0.1 g of a sample to make a total volume of 500 mL, and the mixture was stirred at a temperature of 20 ° C. for 24 hours. After filtration, the filtrate was diluted 10-fold and subjected to atomic absorption analysis to determine Ca. The solubility of the rust preventive pigment in water was calculated from the quantitative value of Ca. As an analytical instrument, Seiko Denshi Kogyo Co., Ltd. atomic absorption spectrophotometer SAS-7500 was used.

Figure 2006097023
Figure 2006097023

中油アルキッド塗料の調製
実施例1、2の防錆顔料の単独及び実施例1の防錆顔料とリン酸亜鉛4水和物との11組み合わせを用い、以下に示す配合処方に従ってそれぞれ中油アルキッド塗料を調製した。
配合処方
防錆顔料 5.0重量%
中油アルキッド樹脂(50%) 50.0重量%
炭酸カルシウム 18.0重量%
タルク 11.0重量%
オクチル酸コバルト(5%) 0.3重量%
オクチル酸バリウム(2%) 1.3重量%
オクチル酸カルシウム(4%) 0.4重量%
キシレン 10.0重量%
ミネラルスピリット 4.0重量%
計 100.0重量%
Preparation of Medium Oil Alkyd Paint Using medium alkyd paints according to the formulation shown below, using the rust preventive pigments of Examples 1 and 2 alone and 11 combinations of the rust preventive pigment of Example 1 and zinc phosphate tetrahydrate. Prepared.
Formulation Anticorrosive pigment 5.0% by weight
Middle oil alkyd resin (50%) 50.0% by weight
Calcium carbonate 18.0% by weight
Talc 11.0% by weight
Cobalt octylate (5%) 0.3% by weight
Barium octylate (2%) 1.3% by weight
Calcium octylate (4%) 0.4% by weight
Xylene 10.0% by weight
Mineral Spirit 4.0% by weight
Total 100.0% by weight

防錆効力
実施例5で得られた中油アルキッド塗料を、脱脂処理鋼板にバーコーターで30μm(ドライ換算)に塗布し、96時間塩水噴霧試験に供した。塗装板にはカッターナイフでクロスカットを入れ、クロスカット部および平面部の錆の発生、膨れの幅および面積で防錆効力を評価した。結果を表2に示す。
なお評価基準は次に示す通りである。
(1)クロスカット部片側の錆および膨れはその最大幅により次の様に評価点数を設けた。
0:5点
1mm未満:4点
1〜3mm:3点
3〜5mm:2点
5mm以上:1点
(2)平面部の錆および膨れはその面積により次のように評価点数を設けた。
0%:5点
10%未満:4点
10〜20%:3点
20〜40%:2点
40%以上:1点
Rust prevention effect The medium oil alkyd paint obtained in Example 5 was applied to a degreased steel plate at 30 μm (dry conversion) with a bar coater and subjected to a salt spray test for 96 hours. The coated plate was cross-cut with a cutter knife, and the antirust effect was evaluated by the occurrence of rust at the cross-cut portion and the flat portion, and the width and area of the swelling. The results are shown in Table 2.
The evaluation criteria are as follows.
(1) The rust and blister on one side of the crosscut part were provided with evaluation scores as follows according to the maximum width.
0: 5 points
Less than 1mm: 4 points
1-3mm: 3 points
3-5mm: 2 points
5 mm or more: 1 point (2) The rust and blister of the plane portion were provided with evaluation scores as follows according to the area.
0%: 5 points
Less than 10%: 4 points
10-20%: 3 points
20-40%: 2 points
40% or more: 1 point

Figure 2006097023
Figure 2006097023

実施例1及び実施例2の防錆顔料の防錆効力はシアナミド鉛に匹敵し、また実施例1の防錆顔料とリン酸亜鉛4水和物との1:1の組み合わせは、シアナミド鉛と同等以上の防錆効力を示した。  The rust preventive efficacy of the rust preventive pigments of Example 1 and Example 2 is comparable to cyanamide lead, and the 1: 1 combination of the rust preventive pigment of Example 1 and zinc phosphate tetrahydrate is The anticorrosive effect was equivalent or better.

本発明のカルシウムと特定金属の複合水酸化物を含有する防錆顔料は、無公害性であるのみならず、鉛系に匹敵する防錆効力を有し、単独または市販防錆顔料と組み合わせて防錆塗料に配合することができる。  The rust preventive pigment containing a composite hydroxide of calcium and a specific metal of the present invention is not only pollution-free, but also has a rust preventive effect comparable to a lead system, alone or in combination with a commercially available rust preventive pigment. It can be blended in anticorrosive paints.

実施例1の防錆顔料のX線回折チャートX-ray diffraction chart of the rust preventive pigment of Example 1 実施例2の防錆顔料のX線回折チャートX-ray diffraction chart of rust preventive pigment of Example 2

符号の説明Explanation of symbols

A:Ca〔Zn(OH)・2H
B:酸化亜鉛
C:3Ca(OH)・2Al(OH)
A: Ca [Zn (OH) 3 ] 2 · 2H 2 O
B: Zinc oxide C: 3Ca (OH) 2 · 2Al (OH) 3

Claims (2)

下記一般式(I)
Ca(OH)・xM(OH)・nHO (I)
(式中xは1/2<x<3を満足する正数、Mは亜鉛からなる2価金属、またはアルミニウムからなる3価金属、yは、Mが2価金属のときは2を、3価金属のときは3を、nは0≦n<3を満足する正数を表す。)
で示されるカルシウムと特定の金属との複合水酸化物を含有することを特徴とする防錆顔料。
The following general formula (I)
Ca (OH) 2 xM (OH) y nH 2 O (I)
(Wherein x is a positive number satisfying 1/2 <x <3, M is a divalent metal made of zinc or a trivalent metal made of aluminum, y is 2 when M is a divalent metal, 3 3 represents a valent metal, and n represents a positive number satisfying 0 ≦ n <3.)
A rust preventive pigment comprising a composite hydroxide of calcium and a specific metal represented by
下記一般式(I)
Ca(OH)・xM(OH)−nHO (I)
(式中xは1/2<x<3を満足する正数、Mは亜鉛からなる2価金属、またはアルミニウムからなる3価金属、yは、Mが2価金属のときは2を、3価金属のときは3を、nは0≦n<3を満足する正数を表す。)
で示されるカルシウムと特定の金属との複合水酸化物と酸化珪素、珪酸カルシウム、珪酸亜鉛および珪酸アルミニウムからなる珪素化合物の1種以上を含み、その10%水懸濁液がpH9〜12の範囲にあることを特徴とする防錆顔料。
The following general formula (I)
Ca (OH) 2 xM (OH) y -nH 2 O (I)
(Wherein x is a positive number satisfying 1/2 <x <3, M is a divalent metal made of zinc or a trivalent metal made of aluminum, y is 2 when M is a divalent metal, 3 3 represents a valent metal, and n represents a positive number satisfying 0 ≦ n <3.)
And a compound hydroxide of calcium and a specific metal and at least one silicon compound consisting of silicon oxide, calcium silicate, zinc silicate and aluminum silicate, and a 10% aqueous suspension having a pH of 9 to 12 A rust preventive pigment characterized by
JP2005274678A 2004-08-30 2005-08-24 Rust preventive pigment containing composite hydroxide of calcium and specific metal Pending JP2006097023A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108047795A (en) * 2018-01-02 2018-05-18 华东理工大学 A kind of zinc silicate anti-corrosion paint with warning function
CN109183043A (en) * 2018-08-22 2019-01-11 浙江恋家生活家居有限公司 A kind of steel part safety and environmental protection antirust derusting method
CN111440469A (en) * 2020-05-28 2020-07-24 吉林大学珠海学院 Antirust pigment and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108047795A (en) * 2018-01-02 2018-05-18 华东理工大学 A kind of zinc silicate anti-corrosion paint with warning function
CN109183043A (en) * 2018-08-22 2019-01-11 浙江恋家生活家居有限公司 A kind of steel part safety and environmental protection antirust derusting method
CN111440469A (en) * 2020-05-28 2020-07-24 吉林大学珠海学院 Antirust pigment and preparation method thereof

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