JPH0578591B2 - - Google Patents
Info
- Publication number
- JPH0578591B2 JPH0578591B2 JP25238684A JP25238684A JPH0578591B2 JP H0578591 B2 JPH0578591 B2 JP H0578591B2 JP 25238684 A JP25238684 A JP 25238684A JP 25238684 A JP25238684 A JP 25238684A JP H0578591 B2 JPH0578591 B2 JP H0578591B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum powder
- powder
- colored aluminum
- weakly acidic
- fatty acid
- 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.)
- Expired - Lifetime
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 49
- 239000003929 acidic solution Substances 0.000 claims description 15
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 10
- 229930195729 fatty acid Natural products 0.000 claims description 10
- 239000000194 fatty acid Substances 0.000 claims description 10
- 150000004665 fatty acids Chemical class 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002736 nonionic surfactant Substances 0.000 claims description 7
- 239000002280 amphoteric surfactant Substances 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- 239000000976 ink Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 7
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 3
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 235000013024 sodium fluoride Nutrition 0.000 description 3
- 239000011775 sodium fluoride Substances 0.000 description 3
- 239000008117 stearic acid Substances 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- VKOBVWXKNCXXDE-UHFFFAOYSA-N icosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCC(O)=O VKOBVWXKNCXXDE-UHFFFAOYSA-N 0.000 description 2
- 239000002563 ionic surfactant Substances 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PUMRUSBKNSBTAL-UHFFFAOYSA-N 3,4-dihydro-2h-chromene-2-carbaldehyde Chemical compound C1=CC=C2OC(C=O)CCC2=C1 PUMRUSBKNSBTAL-UHFFFAOYSA-N 0.000 description 1
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- 235000021357 Behenic acid Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000047703 Nonion Species 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229940116226 behenic acid Drugs 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- -1 fluorine ions Chemical class 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
Landscapes
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Powder Metallurgy (AREA)
Description
（産業上の利用分野）
本発明は着色アルミニウム粉の製造方法に関
し、更に詳しくは黄金色系の色調を有する塗料、
印刷インキ、筆記具用インキ等を得るために顔料
として添加される着色アルミニウム粉の製造方法
に関する。
（従来の技術）
従来より黄金色系の色調を有する塗料、印刷イ
ンキ、筆記具用インキ等を得るために、顔料とし
てそれらに金属粉を添加する事は知られている。
一般にこれらの金属粉としては真鍮粉が用いられ
ているが、この場合、真鍮粉自体が高価であり、
又耐腐食性に乏しいため経時的に変色し易く、更
には、比重が比較的大きいため、ケーキングなど
の現象も発生し易い等種々の問題を有していた。
近年、これらの諸問題を解消せんとして、ベー
マイト処理を施したアルミニウム粉を金属塩とキ
レート能を有する有機化合物とを含む弱アルカリ
溶液に浸漬処理することにより、着色アルミニウ
ム粉を得るようになしたものやアルミニウム粉の
表面に陽極酸化皮膜を形成し、染料等により染色
して着色アルミニウム粉を得るようになしたもの
が知られている。
（発明が解決しようとする問題点）
然し乍ら、これらのものは、アルミニウム粉に
ついて粒径の大きい、例えば100〜200μのものに
ついては問題ないが、用途によつては、特に筆記
具用インキに使用する場合は金属粉の経時的な分
散安定性の面からその粒径を極力小径となすとな
すことが望まれ、そのため粒径を約50μ以下に設
定して処理を行なうと、アルミニウム粉がゲル化
し易くなると共に所望の着色が不可能となり、結
果的に小径の着色アルミニウム粉を得ることが極
めて困難となり、筆記具用インキの顔料に適する
ものが得難いといつた問題点を有していた。
（問題点を解決する為の手段）
そこで本発明者等は優れた黄金色系の色調を有
し、塗料、印刷インキ、筆記具用インキ等に使用
した場合に良好な分散状態が得られるように、粒
径を極力小径となし得る着色アルミニウム粉を得
るべく鋭意研究を重ねた結果、遂に本発明を完成
したものであつて、即ち本発明は、無水クロム酸
と、重クロム酸塩と、フツ化物と、非イオン系界
面活性剤及び／又は両性界面活性剤とから少なく
ともなる弱酸性溶液にアルミニウム粉を浸漬処理
し、乾燥後、脂肪酸で表面処理し、着色アルミニ
ウム粉を得ることを特徴とする着色アルミニウム
粉の製造方法を要旨とするものである。
（作 用）
本発明において、少なくとも上記組成からなる
弱酸性の処理溶液にアルミニウム粉を浸漬処理す
ると、アルミニウム粉表面は酸化され、これによ
つて形成された酸化皮膜中にはフツ素イオンによ
つて６価、３価のクロムが吸着され、結果的に黄
金色系の色調を呈するアルミニウムとの複合酸化
物皮膜が形成されて、所望の着色アルミニウム粉
が得られるものと思われる。
尚、このクロムとアルミニウムの複合酸化物皮
膜は、所謂クロメート皮膜に相当するため、耐腐
食性においても好ましい効果を示す。
又、本発明によるアルミニウム粉の処理溶液は
クロム酸による弱酸性溶液であるために、従来の
弱アルカリ溶液による処理の如くアルミニウム粉
が溶解してゲル化することがなく、従つてその粒
径を極力小径となすことが可能となつたものであ
る。
（構 成）
次に本発明に使用される各成分について説明す
る。
弱酸性溶液はアルミニウム粉を着色するための
もので、無水クロム酸と、重クロム酸塩と、フツ
化物と、非イオン系界面活性剤及び／又は両性界
面活性剤とから少なくともなる水溶液である。
無水クロム酸の使用量は弱酸性溶液全量に対し
て0.1〜1.0重量％が好ましい。
重クロム酸塩としては、重クロム酸ナトリウ
ム、重クロム酸カリウム、重クロム酸アンモニウ
ム等が挙げられ、その使用量は弱酸性溶液全量に
対して0.1〜1.0重量％が好ましい。
フツ化物としてはフツ化ナトリウム、フツ化カ
リウム、フツ化アンモニウム等が挙げられ、その
使用量は弱酸性溶液全量に対して0.01〜0.3重量
％が好ましい。
非イオン系界面活性剤及び両性界面活性剤は、
予じめその保護のためアルミニウム粉表面がステ
アリン酸により処理がなされているため弱酸性溶
液における分散性が悪くなることを解消する目的
で使用されるのと同時に、アルミニウム粉表面を
覆つているステアリン酸皮膜をクロム酸イオンと
の何らかの作用により除去（脱脂）する目的で使
用されるというアルミニウム粉に対する分散、洗
浄の目的のために使用するもので、その具体例と
しては非イオン系界面活性剤として、ポリエチレ
ングリコール型、多価アルコールの部分エステル
型、エステルエーテル型等が挙げられ、両性界面
活性剤として、カルボン酸型、その中でもベタイ
ン型等が挙げられ、これらは１種もしくは２種以
上混合して使用可能であり、これらの使用量は弱
酸性溶液全量に対して0.05〜1.0重量％が好まし
い。0.05重量％より少ないとアルミニウム粉に対
する分散、洗浄の効果が十分でなく、又1.0重量
％より多いと、添加しても、最早これ以上の効果
は得られずコストの面より不利となる。
次に弱酸性溶液のPHについては1.0〜2.5、又、
弱酸性溶液の温度は室温から100℃中でも40℃〜
80℃位に設定しておくことが好ましい。得られる
アルミニウム粉の色調は、前記PH値、処理時間、
処理温度を適宜変えることにより、淡黄色〜黄金
色〜濃かつ色と設定することができる。
次に脂肪酸は前記した弱酸性溶液の処理により
着色されたアルミニウム粉に金属光沢およびリー
フイング力を付与させる目的で使用されるもの
で、炭素数14〜22の脂肪酸が好ましく、その具体
例としてはミリスチン酸、パルミチン酸、ステア
リン酸、アラキン酸、ベヘニン酸、オレイン酸、
リノレン酸などが挙げられ、これらは１種もしく
は２種以上混合して使用可能である。尚、炭素数
13以下の脂肪酸においては潤滑性が低下し、粉砕
時にアルミニウム粉同志の焼付きが起りやすくな
り、アルミニウム粉同志が密着して、光沢、リー
フイング性が不十分となる場合がある。又、炭素
数が23以上の脂肪酸においては粉砕時、アルミニ
ウム粉の扁平化が行われにくく、十分な鱗片形状
が得られにくくなり、光沢、リーフイング性が不
十分となる場合がある。又、この脂肪酸の使用量
は着色アルミニウム粉100重量％に対して0.1〜
3.0重量％が好ましい。使用量が0.1重量％より少
ないとアルミニウム粉同志の焼付きが起りやす
く、又、3.0重量％より多いとアルミニウム粉の
扁平化が進みにくくなり十分な鱗片形状が得られ
にくくなる場合がある。
次に本発明の着色アルミニウム粉の製造方法を
示すと前記した弱酸性溶液を調製し、これにアル
ミニウム粉を適宜温度で必要時間浸漬処理し、ろ
過後、必要時間乾燥して着色アルミニウム粉を得
た後、粉砕機に入れ、前記脂肪酸を添加し、粉砕
して本発明の着色アルミニウム粉を得る。
（実施例）
以下に本発明を実施例により詳細に説明する
が、実施例中「部」とあるのは「重量部」を示
す。
実施例 １
無水クロム酸 0.4部
重クロム酸ナトリウム 0.35部
フツ化ナトリウム 0.08部
ニツサンノニオンNS215
（非イオン系界面活性剤、
日本油脂(株)製） 0.5部
水 98.67部
上記各成分を混合し弱酸性溶液を調整し、これ
にアルミニウム粉（アルペースト240−Ｔ、東洋
アルミニウム(株)製、平均粒径5μを50℃48時間乾
燥させたもの）を５部添加し、50℃、20分、PH
1.8で撹拌しながら浸漬処理し、ろ過、乾燥した。
この乾燥着色アルミニウム粉100重量部に対して
0.5重量部のステアリン酸を添加し、スタンプミ
ルにて粉砕し、金色のアルミニウム粉を得た。
実施例 ２
無水クロム酸 0.4部
重クロム酸ナトリウム 0.35部
フツ化ナトリウム 0.08部
アノンBF
（両性界面活性剤、日本油脂(株)製） 0.1部
水 99.07部
上記各成分を混合し弱酸性溶液を調整し、これ
にアルミニウム粉（Chromal Ｘ，ECKART−
WERKE社製、平均粒径6μ）を５部添加し、50
℃、10分、PH1.8で撹拌しながら浸漬処理し、ろ
過、乾燥した。
この乾燥着色アルミニウム粉100重量部に対し
て0.5重量部のオレイン酸を添加し、スタンプミ
ルにて粉砕し、金色のアルミニウム粉を得た。
（効 果）
以上実施例１、実施例２で得られた金色のアル
ミニウム粉と、比較例１として市販の真鍮粉（金
粉No.7000、福田金属箔粉工業(株)製）、比較例２と
して市販の真鍮粉（ブロンズパウダーオフセツト
3000スーパーリツチゴールド、EKART−
WERKE社製）を表−１の組成でインキ化したサ
ンプル１〜４を調製し、分散性試験、腐食性試
験、変色性試験を行なつた結果を表−２に示す。
(Industrial Application Field) The present invention relates to a method for producing colored aluminum powder, and more specifically to a coating material having a golden yellow tone,
This invention relates to a method for producing colored aluminum powder that is added as a pigment to obtain printing inks, writing instrument inks, and the like. (Prior Art) It has been known to add metal powder as a pigment to paints, printing inks, writing instrument inks, etc. having a golden color tone.
Generally, brass powder is used as these metal powders, but in this case, the brass powder itself is expensive,
Furthermore, it has various problems, such as poor corrosion resistance, which tends to discolor over time, and furthermore, the relatively high specific gravity, which tends to cause phenomena such as caking. In recent years, in an effort to solve these problems, colored aluminum powder has been obtained by immersing boehmite-treated aluminum powder in a weak alkaline solution containing a metal salt and an organic compound with chelating ability. It is known that an anodic oxide film is formed on the surface of an object or aluminum powder, and then dyed with a dye or the like to obtain colored aluminum powder. (Problems to be Solved by the Invention) However, these products do not pose a problem when it comes to aluminum powder with a large particle size, for example, 100 to 200μ, but depending on the application, it may be difficult to use them, especially in ink for writing instruments. In this case, it is desirable to keep the particle size as small as possible from the viewpoint of the dispersion stability of the metal powder over time. Therefore, if the particle size is set to about 50μ or less and the treatment is carried out, the aluminum powder will gel. As the process becomes easier, it becomes impossible to achieve the desired coloration, and as a result, it becomes extremely difficult to obtain colored aluminum powder with a small diameter, which poses the problem of difficulty in obtaining pigments suitable for use in ink for writing instruments. (Means for Solving the Problems) Therefore, the inventors of the present invention have developed a method that has an excellent golden color tone and can obtain a good dispersion state when used in paints, printing inks, inks for writing instruments, etc. The present invention was finally completed as a result of extensive research in order to obtain colored aluminum powder whose particle size could be made as small as possible. aluminum powder is immersed in a weakly acidic solution consisting of at least a compound, a nonionic surfactant, and/or an amphoteric surfactant, and after drying, the surface is treated with a fatty acid to obtain colored aluminum powder. The gist of this paper is a method for producing colored aluminum powder. (Function) In the present invention, when aluminum powder is immersed in a weakly acidic treatment solution having at least the above composition, the surface of the aluminum powder is oxidized, and the oxide film formed thereby contains fluorine ions. As a result, hexavalent and trivalent chromium is adsorbed, resulting in the formation of a composite oxide film with aluminum that exhibits a golden yellow tone, and it is believed that the desired colored aluminum powder is obtained. This composite oxide film of chromium and aluminum corresponds to a so-called chromate film, and therefore exhibits a favorable effect in terms of corrosion resistance. Furthermore, since the treatment solution for aluminum powder according to the present invention is a weakly acidic solution using chromic acid, the aluminum powder does not dissolve and gel as in conventional treatment with a weakly alkaline solution, and therefore the particle size can be reduced. This makes it possible to make the diameter as small as possible. (Structure) Next, each component used in the present invention will be explained. The weakly acidic solution is for coloring aluminum powder, and is an aqueous solution consisting of at least chromic anhydride, dichromate, fluoride, and a nonionic surfactant and/or an amphoteric surfactant. The amount of chromic anhydride used is preferably 0.1 to 1.0% by weight based on the total amount of the weakly acidic solution. Examples of the dichromate include sodium dichromate, potassium dichromate, ammonium dichromate, etc., and the amount used is preferably 0.1 to 1.0% by weight based on the total amount of the weakly acidic solution. Examples of the fluoride include sodium fluoride, potassium fluoride, ammonium fluoride, etc., and the amount used is preferably 0.01 to 0.3% by weight based on the total amount of the weakly acidic solution. Nonionic surfactants and amphoteric surfactants are
The surface of the aluminum powder has been treated with stearic acid in advance to protect it, so it is used to solve the problem of poor dispersibility in weakly acidic solutions. It is used for the purpose of dispersing and cleaning aluminum powder, which is used to remove (degrease) the acid film by some kind of interaction with chromate ions.A specific example is as a nonionic surfactant. , polyethylene glycol type, polyhydric alcohol partial ester type, ester ether type, etc. Ampholytic surfactants include carboxylic acid type, among which betaine type, etc. These can be used alone or in combination of two or more types. The amount used is preferably 0.05 to 1.0% by weight based on the total amount of the weakly acidic solution. If it is less than 0.05% by weight, the effect of dispersing and cleaning the aluminum powder will not be sufficient, and if it is more than 1.0% by weight, even if it is added, no further effect can be obtained, which is disadvantageous in terms of cost. Next, the pH of weakly acidic solutions is 1.0 to 2.5, and
The temperature of weakly acidic solutions ranges from room temperature to 40°C even at 100°C.
It is preferable to set the temperature to around 80°C. The color tone of the resulting aluminum powder depends on the PH value, processing time,
By appropriately changing the treatment temperature, the color can be set from pale yellow to golden yellow to deep and dark. Next, the fatty acid is used for the purpose of imparting metallic luster and leafing power to the aluminum powder colored by the treatment with the weakly acidic solution described above, and fatty acids having 14 to 22 carbon atoms are preferred, and specific examples thereof include: myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, oleic acid,
Examples include linolenic acid, and these can be used alone or in combination of two or more. In addition, the number of carbon
If the fatty acid number is 13 or less, the lubricity decreases, and the aluminum powder tends to stick to each other during grinding, and the aluminum powder may adhere to each other, resulting in insufficient gloss and leafing properties. Furthermore, when using fatty acids with carbon numbers of 23 or more, it is difficult to flatten the aluminum powder during grinding, making it difficult to obtain a sufficient scale shape, and gloss and leafing properties may be insufficient. In addition, the amount of this fatty acid used is 0.1 to 100% by weight of colored aluminum powder.
3.0% by weight is preferred. If the amount used is less than 0.1% by weight, the aluminum powder tends to seize together, and if it is more than 3.0% by weight, it may be difficult to flatten the aluminum powder, making it difficult to obtain a sufficient scale shape. Next, the method for producing colored aluminum powder of the present invention will be described. The above-mentioned weakly acidic solution is prepared, aluminum powder is immersed in it at an appropriate temperature for a required time, filtered, and then dried for a required time to obtain a colored aluminum powder. After that, the powder is placed in a pulverizer, the fatty acid is added thereto, and the powder is pulverized to obtain the colored aluminum powder of the present invention. (Example) The present invention will be explained in detail with reference to Examples below. In the Examples, "parts" indicate "parts by weight." Example 1 Chromic anhydride 0.4 parts Sodium dichromate 0.35 parts Sodium fluoride 0.08 parts Nitsusan Nonion NS215 (non-ionic surfactant, manufactured by NOF Corporation) 0.5 parts Water 98.67 parts The above components were mixed and mixed together. Prepare an acidic solution, add 5 parts of aluminum powder (Alpaste 240-T, manufactured by Toyo Aluminum Co., Ltd., average particle size 5μ, dried at 50°C for 48 hours), and heat at 50°C for 20 minutes. PH
The mixture was immersed at a temperature of 1.8 liters with stirring, filtered, and dried.
For 100 parts by weight of this dry colored aluminum powder
0.5 parts by weight of stearic acid was added and pulverized in a stamp mill to obtain golden aluminum powder. Example 2 Chromic anhydride 0.4 parts Sodium dichromate 0.35 parts Sodium fluoride 0.08 parts Anon BF (ampholytic surfactant, manufactured by NOF Corporation) 0.1 parts Water 99.07 parts The above components were mixed to prepare a weakly acidic solution. Then add aluminum powder (Chromal X, ECKART-
Added 5 parts of WERKE (manufactured by WERKE, average particle size 6μ), 50
The mixture was immersed at ℃ for 10 minutes at pH 1.8 with stirring, filtered, and dried. 0.5 parts by weight of oleic acid was added to 100 parts by weight of this dry colored aluminum powder, and the mixture was ground in a stamp mill to obtain golden aluminum powder. (Effect) The golden aluminum powder obtained in Examples 1 and 2 above, the commercially available brass powder (Gold Powder No. 7000, manufactured by Fukuda Metal Foil Powder Industry Co., Ltd.) as Comparative Example 1, and Comparative Example 2 Brass powder commercially available as Bronze Powder Offset
3000 Super Rich Gold, EKART−
Samples 1 to 4 (manufactured by WERKE Co., Ltd.) were prepared as inks with the compositions shown in Table 1, and a dispersibility test, a corrosion test, and a discoloration test were conducted. The results are shown in Table 2.
【表】【table】
【表】【table】
【表】
以上に示す如く本発明の製造方法により得られ
た着色アルミニウム粉は塗料、印刷インキ、筆記
具用インキ等の顔料として使用した場合、分散
性、耐腐食性、耐変色性等に優れた特性を有する
ものである。[Table] As shown above, the colored aluminum powder obtained by the production method of the present invention has excellent dispersibility, corrosion resistance, color fastness, etc. when used as a pigment for paints, printing inks, writing instrument inks, etc. It has characteristics.
Claims (1)
と、非イオン系界面活性剤及び／又は両性界面活
性剤とから少なくともなる弱酸性溶液にアルミニ
ウム粉を浸漬処理し、乾燥後、脂肪酸で表面処理
し、着色アルミニウム粉を得ることを特徴とする
着色アルミニウム粉の製造方法。 ２ 非イオン系界面活性剤及び／又は両性界面活
性剤がポリエチレングリコール型、多価アルコー
ルの部分エステル型、エステルエーテル型、カル
ボン酸型の中の１種もしくは２種以上である特許
請求の範囲第１項記載の着色アルミニウム粉の製
造方法。 ３ 脂肪酸が炭素数14〜22の脂肪酸である特許請
求の範囲第１項記載の着色アルミニウム粉の製造
方法。[Scope of Claims] 1. Aluminum powder is immersed in a weakly acidic solution consisting of at least chromic anhydride, dichromate, fluoride, nonionic surfactant and/or amphoteric surfactant, A method for producing colored aluminum powder, which comprises drying and then surface-treating with a fatty acid to obtain colored aluminum powder. 2. Claims No. 1 in which the nonionic surfactant and/or amphoteric surfactant is one or more of polyethylene glycol type, polyhydric alcohol partial ester type, ester ether type, and carboxylic acid type. A method for producing colored aluminum powder according to item 1. 3. The method for producing colored aluminum powder according to claim 1, wherein the fatty acid is a fatty acid having 14 to 22 carbon atoms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59252386A JPS61130375A (en) | 1984-11-29 | 1984-11-29 | Production of colored aluminum powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59252386A JPS61130375A (en) | 1984-11-29 | 1984-11-29 | Production of colored aluminum powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61130375A JPS61130375A (en) | 1986-06-18 |
| JPH0578591B2 true JPH0578591B2 (en) | 1993-10-29 |
Family
ID=17236596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59252386A Granted JPS61130375A (en) | 1984-11-29 | 1984-11-29 | Production of colored aluminum powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61130375A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19501307C2 (en) * | 1995-01-18 | 1999-11-11 | Eckart Standard Bronzepulver | Colored aluminum pigments, processes for their production and their use |
| FR2734834B1 (en) * | 1995-05-31 | 1997-07-25 | Zschimmer Schwarz France | METHOD FOR MODIFYING THE SURFACE PROPERTIES OF AQUEOUS SUSPENSION PARTICLES AND APPLICATIONS THEREOF |
| DE19520312B4 (en) * | 1995-06-02 | 2004-09-16 | Eckart-Werke Standard-Bronzepulver-Werke Carl Eckart Gmbh & Co. | Oxidized colored aluminum pigments, processes for their production and their use |
| RU2413745C2 (en) * | 2009-04-10 | 2011-03-10 | Александр Михайлович Барский | Anticorrosive pigment |
| CN108687340B (en) * | 2018-05-24 | 2020-03-20 | 淮阴师范学院 | Method for improving high-temperature heat reaction performance of aluminum powder through surface modification |
-
1984
- 1984-11-29 JP JP59252386A patent/JPS61130375A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61130375A (en) | 1986-06-18 |
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