JPH0555563B2 - - Google Patents
Info
- Publication number
- JPH0555563B2 JPH0555563B2 JP62110160A JP11016087A JPH0555563B2 JP H0555563 B2 JPH0555563 B2 JP H0555563B2 JP 62110160 A JP62110160 A JP 62110160A JP 11016087 A JP11016087 A JP 11016087A JP H0555563 B2 JPH0555563 B2 JP H0555563B2
- Authority
- JP
- Japan
- Prior art keywords
- impregnating agent
- resin
- air
- parts
- curing
- 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
- 239000003795 chemical substances by application Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 21
- 239000011347 resin Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 16
- 238000005470 impregnation Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 239000000178 monomer Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000003672 processing method Methods 0.000 claims description 7
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- 125000005397 methacrylic acid ester group Chemical group 0.000 claims description 3
- -1 acrylic ester Chemical class 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000007788 liquid Substances 0.000 description 10
- 239000003973 paint Substances 0.000 description 10
- 238000001723 curing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 238000013007 heat curing Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- HWSSEYVMGDIFMH-UHFFFAOYSA-N 2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOC(=O)C(C)=C HWSSEYVMGDIFMH-UHFFFAOYSA-N 0.000 description 2
- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 description 1
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 description 1
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- YDKNBNOOCSNPNS-UHFFFAOYSA-N methyl 1,3-benzoxazole-2-carboxylate Chemical compound C1=CC=C2OC(C(=O)OC)=NC2=C1 YDKNBNOOCSNPNS-UHFFFAOYSA-N 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Description
〔産業上の利用分野〕
本発明は金属多孔質体に安定な塗膜を形成させ
るために必要な金属多孔質体の樹脂含浸加工方法
に関する。
〔従来の技術〕
鋳造品・焼結金属など内部に空〓を有する多孔
質体が自動車部品、ポンプ部品など気体や液体を
収容し、更にそれらが内圧をもつような条件下で
使用される場合に、種々の封孔剤による含浸加工
が行なわれる。
封孔剤としては、歴史的には無機系の水ガラス
が広く用いられてきたが、封孔効果の信頼性、加
工生産性の点で近年樹脂含浸剤が注目され、シエ
アを伸ばしつつある。
樹脂含浸剤としては単量体の粘度、蒸気圧、重
合反応性の点で選択の自由度の高いアクリルエス
テル系が大部分を占めており、特開昭52−154859
号公報などに種々の技術が記載されている。
又、本発明の対象とする樹脂含浸加工方法に関
しては、特公昭50−20989号公報に「無機質材料
成型体中に重合開始剤を含有するビニル単量体を
含浸し、ビニル単量体を溶解した水溶液を熱媒と
して用いて加熱硬化する」方法が記載されてい
る。
〔発明が解決しようとする問題点〕
種々の多孔質体に封孔剤が用いられる場合、そ
の目的とする効果として気密性の付与以外に塗装
の塗膜の安定な形成を狙いとすることがある。特
にエポキシ樹脂系塗料などにより多孔質体に粉体
塗装により塗膜を形成させようとすると基材の空
〓に含まれる空気の加熱による膨張により平滑な
塗膜が得られず、所謂ピンホールが塗膜に発生し
問題となる。
このような問題を解決するために、アクリル系
単量体を主成分とする樹脂含浸剤を用いた含浸加
工が行なわれる。
しかし乍らこのような効果を目的とする含浸加
工条件は、通常の鋳造品に気密性を与えるための
ものとは全く異なり、特に加工工程で多孔質体表
面に付着した樹脂含浸剤を除去する方法及びその
後の加熱による含浸剤の硬化の方法に特殊な方法
が必要である。
〔問題点を解決するための手段〕
樹脂含浸加工工程は一般的に多孔質体からなる
部品の樹脂→含浸剤の脱気→部品の浸漬→減圧→
加圧→水洗→加熱硬化のような各工程から成る。
本発明者らは、金属多孔質体から成る部品に安
定・平滑な塗膜を形成することを目的とする樹脂
含浸加工条件に関して研究を行なつた結果、金属
多孔質体の浸漬処理の際にその表面に付着した過
剰の樹脂含浸剤を除去するために通常行なわれて
いる水洗を行なわずエアーブローで行い、且つそ
の後の加熱硬化においても熱水又は他の液体の熱
媒を用いず空気中で加熱することにより、目的が
達成されることを見出し本発明を完成した。
即ち本発明は、ビニル系単量体から成る樹脂含
浸剤を使用して金属多孔質体を加工する方法にお
いて、含浸液の含浸処理に際し金属多孔質体表面
に付着した含浸剤をエアーブロー方式により、且
つ、孔に含浸された含浸剤の加熱硬化を空気中で
行うことを特徴とする塗装安定性に優れた金属多
孔質体の樹脂含浸加工方法である。
鋳造品に対する機密性付与などの目的で用いら
れる液体による洗浄及び液体中での硬化は安定な
塗膜の形成に対しては有効でない。
本発明の実施に際して使用される樹脂含浸剤と
しては、アクリル酸エステル及び／又はメタクリ
ル酸エステルを主成分とする謂ゆるアクリル系樹
脂含浸剤及びスチレン架橋型不飽和ポリエステル
系樹脂含浸剤などが好ましい。
従つて本発明の対象となる単量体としては、ア
クリル系を中心とするビニル系単量体、即ちメタ
クリル酸メチル、メタクリル酸エチル、メタクリ
ル酸２−エチルヘキシル、メタクリル酸ラウリ
ル、メタクリル酸２−ヒドロキシプロピル、メタ
クリル酸グリシジル、アクリル酸ｎ−ブチル、ジ
メタクリル酸エチレングリコール、ジメタクリル
酸トリエチレングリコール、トリメタクリル酸ト
リメチロールプロパン、ジアクリル酸ネオペンチ
ルグリコール、酢酸ビニル、スチレンなど及びこ
れらの混合物が挙げられる。又、金属多孔質体と
しては、アルミニウム、亜鉛、マグネシウム、鉄
などの鋳造品、焼結金属、フエライトなどの酸化
物焼結体などが対象となるが、これらの中で特に
塗装した部品として用いられるケースが多い鋳造
品及び酸化物焼結体が実用的な対象となる。
本発明で用いるエアーブロー方式は、液状物を
加圧空気によつて霧状に飛散させる操作であつ
て、使用する空気の圧力はほゞ３Kg／cm2であるも
のが用いられる。
本発明の加工方法により目的とする効果を得る
ためには、金属多孔質体からの過剰の含浸剤の除
去をエアーブロー方式で、加熱硬化を空気中で行
なうことが必要であり、これらの一方に水などの
液体を使用すると所期する効果は得難い。
〔作用〕
粉体塗装など塗料が高粘度の状態で塗膜が形成
される塗装方法においては、金属多孔質体に樹脂
含浸を行なつても、含浸工程で液体を用いる洗浄
及び硬化を行なうことにより、その過程で空〓の
金属多孔質体表層部分において含浸剤が除去さ
れ、更に重合反応による硬化収縮により含浸され
た部分の陥没がおこる。
その結果、表層の陥没した空〓を塗膜で埋める
ことができず、空気を塗膜の下部に残すため加熱
による膨張でピンホールを発生させるものと思わ
れる。
水洗又は熱水硬化による表層部の未硬化の含浸
剤の流出が高温による含浸剤の粘度低下が起こる
加熱硬化に熱水を用いた場合に著しいことは、実
施例３に示すように、樹脂含浸剤の部品表面から
の除去を空気中で行ない、硬化を熱水中で行なつ
た場合に、水洗により含浸剤を除去し、熱風乾燥
器中で硬化させた場合に較べて塗膜にピンホール
が発生する部品の比率がはるかに高いことから推
定される。
本発明による方法によれば、洗浄及び硬化時液
体によつて金属多孔質体の表層部分の空〓に存在
する液状の含浸剤の流出を防止できるので、塗膜
との間に空〓が残らずピンホールの発生を抑え平
滑な塗膜が形成される。
次に実施例により本発明の効果を説明する。
実施例 １
メタクリル酸エステルを主成分とする次の組成
比率を有する樹脂含浸剤を調整した。（組成１と
する。）
メタクリル酸２−ヒドロキシプロピル 60重量部
メタクリル酸２−エチルヘキシル 15重量部
ジメタクリル酸トリエチレングリコール25重量部
アゾビスイソブチロニトリル 0.3重量部
この含浸剤の20℃におけるＢ型粘度計による粘
度は11センチポイズであつた。又内径６mmの試験
管にこの含浸剤を１ml入れ90℃の熱水中に入れゲ
ル化を起こすまでの時間（ゲルタイム）を測定し
た結果２分10秒であつた。次に、みかけ密度8.0
ｇ／cm3、空〓率10％の焼結金属製部品25個を、内
容積50のステンレス製二槽式含浸槽により以下
の条件で含浸、硬化した。
(1) 脱脂（塩素系溶剤中に10分間浸漬→（100℃
×30分乾燥）
↓
(2) 組成１の含浸剤を減圧下により５分間脱気
↓
(3) 部品の５分間脱気
↓
(4) 含浸剤を部品側へ送液30分間減圧
↓
(5) ５Kg／cm2の圧で５分間加圧
↓
(6) 部品を含浸剤から引上げ２分間液切り
↓
(7) ３Kg／cm2の圧で部品表面に付着した含浸剤を
エアーブローにより除去
↓
(8) 100℃に温度調節された乾燥器中で30分間加
熱し、含浸剤を硬化
含浸加工した焼結金属部品を150℃に予熱した
後、エポキシ系粉体塗料を付着させ200℃で加熱
溶融し連続した厚さ500μの塗膜とした。このよ
うに塗装した部品25個の表面を目視で検査した結
果、塗膜にピンホールがみとめられた部品は１個
であつた。
実施例 ２
組成１の含浸剤を用いて実施例１で使用したも
のと同じ部品を25個含浸した。但し、工程(1)〜(8)
のうち次の二つの工程を以下のように変更し、そ
れ以外の工程は実施例１と同条件とした。
(7) 常温で３分間流水洗を行なう
↓
(8) 90℃の熱水中で20分間加熱硬化
含浸した25個の部品を実施例１と同条件で塗装
し、塗膜の状態を検査した結果、25個中23個のピ
ンホールがみられた。
実施例 ３
外径20mm、内径10mm、高さ10mmの円筒状のフエ
ライトコア（みかけ密度5.0ｇ／cm3、空〓率0.25
％）を各25個ずつ準備し組成１の含浸剤により含
浸加工した。
含浸条件として、工程(1)〜(6)は実施例１と同条
件とし、工程(7)及び(8)として以下の条件を採用し
た。
[Industrial Application Field] The present invention relates to a method for impregnating a porous metal body with a resin, which is necessary for forming a stable coating film on the porous metal body. [Prior art] When porous bodies with voids inside, such as cast products and sintered metals, contain gas or liquid, such as automobile parts or pump parts, and are used under conditions where they have internal pressure. Then, impregnation processing with various sealants is performed. Historically, inorganic water glass has been widely used as a pore sealing agent, but in recent years resin impregnating agents have attracted attention due to their reliability in pore sealing effect and processing productivity, and their market share is increasing. The majority of resin impregnating agents are acrylic esters, which have a high degree of freedom in selection in terms of monomer viscosity, vapor pressure, and polymerization reactivity.
Various techniques are described in publications such as Japanese Patent Publications. Regarding the resin impregnation processing method that is the object of the present invention, Japanese Patent Publication No. 50-20989 describes a process in which a vinyl monomer containing a polymerization initiator is impregnated into an inorganic material molded body, and the vinyl monomer is dissolved. A method of ``curing by heating using an aqueous solution obtained as a heating medium'' is described. [Problems to be solved by the invention] When a sealant is used for various porous bodies, the intended effect is not only to provide airtightness but also to form a stable paint film. be. In particular, when attempting to form a paint film on a porous material by powder coating with an epoxy resin paint, etc., a smooth paint film cannot be obtained due to expansion due to heating of the air contained in the voids of the base material, resulting in so-called pinholes. It occurs on the paint film and becomes a problem. In order to solve such problems, impregnation processing using a resin impregnating agent containing an acrylic monomer as a main component is performed. However, the impregnation processing conditions aimed at achieving this effect are completely different from those used to impart airtightness to ordinary cast products, and in particular, the impregnation processing conditions that are used to achieve this effect are those used to remove the resin impregnating agent that has adhered to the surface of the porous body during the processing process. Special methods are required for the method and subsequent curing of the impregnating agent by heating. [Means for solving the problem] The resin impregnation processing process generally involves the following steps: resin of a porous part → degassing of the impregnant → immersion of the part → depressurization →
It consists of various steps such as pressurization → water washing → heat curing. The present inventors conducted research on resin impregnation processing conditions for the purpose of forming a stable and smooth coating film on parts made of porous metal bodies. In order to remove excess resin impregnating agent adhering to the surface, air blowing was used instead of the usual water washing, and the subsequent heat curing was performed in air without using hot water or other liquid heating medium. The present invention was completed based on the discovery that the object could be achieved by heating at . That is, the present invention is a method for processing a porous metal body using a resin impregnating agent made of a vinyl monomer, in which the impregnating agent attached to the surface of the porous metal body is removed by an air blowing method during the impregnation treatment with an impregnating liquid. , and a resin impregnation processing method for a metal porous body having excellent coating stability, characterized in that the impregnating agent impregnated into the pores is heated and cured in air. Cleaning with a liquid and curing in a liquid, which are used for the purpose of imparting airtightness to a cast product, are not effective for forming a stable coating film. The resin impregnating agent used in carrying out the present invention is preferably a so-called acrylic resin impregnating agent containing an acrylic ester and/or a methacrylic ester as a main component, a styrene-crosslinked unsaturated polyester resin impregnating agent, and the like. Therefore, the monomers targeted by the present invention include vinyl monomers, mainly acrylic monomers, such as methyl methacrylate, ethyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, and 2-hydroxy methacrylate. Examples include propyl, glycidyl methacrylate, n-butyl acrylate, ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, neopentyl glycol diacrylate, vinyl acetate, styrene, and mixtures thereof. . Examples of porous metal bodies include cast products of aluminum, zinc, magnesium, iron, etc., sintered metals, and sintered bodies of oxides such as ferrite. The practical targets are cast products and oxide sintered bodies, which are often used. The air blow method used in the present invention is an operation in which a liquid substance is dispersed in a mist form using pressurized air, and the air pressure used is approximately 3 kg/cm 2 . In order to obtain the desired effect by the processing method of the present invention, it is necessary to remove excess impregnating agent from the porous metal body using an air blow method and heat curing in air. If a liquid such as water is used, it is difficult to obtain the desired effect. [Function] In coating methods such as powder coating where a coating film is formed with a highly viscous coating, even if a porous metal body is impregnated with a resin, cleaning and curing using a liquid must be performed during the impregnation process. During this process, the impregnating agent is removed from the surface layer of the empty porous metal body, and further, the impregnated area collapses due to curing shrinkage caused by the polymerization reaction. As a result, the paint film is unable to fill the cavities in the surface layer, leaving air at the bottom of the paint film, which is thought to cause pinholes to occur due to expansion due to heating. As shown in Example 3, when hot water is used for heat curing, the flow of uncured impregnating agent from the surface layer due to water washing or hot water curing is significant, as the viscosity of the impregnating agent decreases due to high temperatures. When the impregnating agent is removed from the surface of the part in air and the curing is performed in hot water, there are fewer pinholes in the paint film than when the impregnating agent is removed by washing with water and cured in a hot air dryer. This is estimated from the fact that the proportion of parts where this occurs is much higher. According to the method of the present invention, it is possible to prevent the liquid impregnating agent present in the voids in the surface layer of the porous metal body from flowing out due to the liquid during cleaning and curing, so that no voids remain between the coating film and the coating film. A smooth coating film is formed by suppressing the occurrence of pinholes. Next, the effects of the present invention will be explained with reference to Examples. Example 1 A resin impregnating agent containing methacrylic acid ester as a main component and having the following composition ratio was prepared. (Composition 1) 2-hydroxypropyl methacrylate 60 parts 2-ethylhexyl methacrylate 15 parts triethylene glycol dimethacrylate 25 parts azobisisobutyronitrile 0.3 parts B of this impregnating agent at 20°C The viscosity measured by a type viscometer was 11 centipoise. In addition, 1 ml of this impregnating agent was placed in a test tube with an inner diameter of 6 mm, and the time taken for gelation to occur (gel time) was measured by placing it in hot water at 90° C., and the result was 2 minutes and 10 seconds. Next, apparent density 8.0
25 sintered metal parts with a weight of 10 g/cm 3 and a void ratio of 10% were impregnated and hardened in a stainless steel two-tank impregnation tank with an internal volume of 50 mm under the following conditions. (1) Degreasing (immersion in chlorinated solvent for 10 minutes → (100℃)
x 30 minutes drying) ↓ (2) Degas the impregnating agent of composition 1 under reduced pressure for 5 minutes ↓ (3) Degas the parts for 5 minutes ↓ (4) Send the impregnating agent to the parts side and reduce the pressure for 30 minutes ↓ (5 ) Pressurize for 5 minutes at a pressure of 5Kg/cm 2 ↓ (6) Lift the part from the impregnant and drain for 2 minutes ↓ (7) Remove the impregnant attached to the part surface by air blowing at a pressure of 3Kg/cm 2 ↓ (8) Heat for 30 minutes in a dryer controlled at 100℃ to harden the impregnating agent. After preheating the impregnated sintered metal parts to 150℃, apply epoxy powder coating and heat at 200℃. It was melted into a continuous coating film with a thickness of 500μ. As a result of visually inspecting the surfaces of 25 parts painted in this way, only one part had pinholes observed in the coating film. Example 2 An impregnating agent of composition 1 was used to impregnate 25 of the same parts as used in example 1. However, steps (1) to (8)
The following two steps were changed as follows, and the other steps were kept under the same conditions as in Example 1. (7) Rinse with running water for 3 minutes at room temperature ↓ (8) Heat cure in hot water at 90°C for 20 minutes 25 impregnated parts were painted under the same conditions as Example 1, and the state of the paint film was inspected. As a result, 23 out of 25 pinholes were found. Example 3 Cylindrical ferrite core with an outer diameter of 20 mm, an inner diameter of 10 mm, and a height of 10 mm (apparent density 5.0 g/cm 3 , void ratio 0.25)
%) were prepared and impregnated with the impregnating agent of Composition 1. The impregnation conditions were the same as in Example 1 for steps (1) to (6), and the following conditions were used for steps (7) and (8).
【表】
含浸加工したフエライトコアを実施例１と同条
件でエポキシ粉体塗料により塗装し、ピンホール
の発生を検査した結果、以下のようになつた。[Table] The impregnated ferrite core was coated with epoxy powder paint under the same conditions as in Example 1, and the occurrence of pinholes was examined, and the results were as follows.
Claims (1)
て金属多孔質体を加工する方法において、金属多
孔質体の表面に付着した樹脂含浸剤をエアーブロ
ー方式で除去し、加熱硬化を空気中で行うことを
特徴とする塗装安定性に優れた樹脂含浸加工方
法。 ２ ビニル系単量体がアクリル酸エステル及び／
又はメタアクリル酸エステルから成ることを特徴
とする特許請求の範囲第１項記載の樹脂含浸加工
方法。 ３ 金属多孔質体が酸化物燒結体であることをを
特徴とする特許請求の範囲第１項または第２項記
載の樹脂含浸加工方法。[Claims] 1. A method for processing a porous metal body using a resin impregnating agent made of a vinyl monomer, in which the resin impregnating agent attached to the surface of the porous metal body is removed by an air blow method. , a resin impregnation processing method with excellent coating stability characterized by heating and curing in air. 2 The vinyl monomer is an acrylic ester and/or
The resin impregnation processing method according to claim 1, characterized in that the resin impregnation processing method is made of a methacrylic acid ester or a methacrylic acid ester. 3. The resin impregnation processing method according to claim 1 or 2, wherein the metal porous body is an oxide sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11016087A JPS63274704A (en) | 1987-05-06 | 1987-05-06 | Method for impregnating resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11016087A JPS63274704A (en) | 1987-05-06 | 1987-05-06 | Method for impregnating resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63274704A JPS63274704A (en) | 1988-11-11 |
| JPH0555563B2 true JPH0555563B2 (en) | 1993-08-17 |
Family
ID=14528570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11016087A Granted JPS63274704A (en) | 1987-05-06 | 1987-05-06 | Method for impregnating resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63274704A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW541586B (en) * | 2001-05-25 | 2003-07-11 | Tokyo Electron Ltd | Substrate table, production method therefor and plasma treating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630060A (en) * | 1979-08-20 | 1981-03-26 | Nippon Steel Corp | Mold for use in continuous casting of metal |
| JPS59215403A (en) * | 1983-05-20 | 1984-12-05 | Sumitomo Electric Ind Ltd | Manufacture of sintered airtight parts |
| JPS6121281A (en) * | 1984-07-09 | 1986-01-29 | セコム株式会社 | Electric lock apparatus |
-
1987
- 1987-05-06 JP JP11016087A patent/JPS63274704A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630060A (en) * | 1979-08-20 | 1981-03-26 | Nippon Steel Corp | Mold for use in continuous casting of metal |
| JPS59215403A (en) * | 1983-05-20 | 1984-12-05 | Sumitomo Electric Ind Ltd | Manufacture of sintered airtight parts |
| JPS6121281A (en) * | 1984-07-09 | 1986-01-29 | セコム株式会社 | Electric lock apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63274704A (en) | 1988-11-11 |
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