JP2000051994A - Coating agent composition for casting - Google Patents
Coating agent composition for castingInfo
- Publication number
- JP2000051994A JP2000051994A JP10230503A JP23050398A JP2000051994A JP 2000051994 A JP2000051994 A JP 2000051994A JP 10230503 A JP10230503 A JP 10230503A JP 23050398 A JP23050398 A JP 23050398A JP 2000051994 A JP2000051994 A JP 2000051994A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- coating agent
- agent composition
- coating composition
- refractory aggregate
- 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.)
- Granted
Links
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
Description
【０００１】[0001]
【従来の技術】一般に塗型剤は、溶媒中にジルコン、マ
グネシア、シリカ、アルミナ、黒鉛等の耐火骨材を分散
したものであるが、分散安定性が悪く、塗布が不均一に
なると、品質の安定した鋳物が得られない。その改良の
ため特開平１−224136号公報記載の界面活性剤とセルロ
ースエーテルを含有するもの、特許第2647856号記載の
アルキル化セルロースのアルキレンオキサイド付加物を
含有するものなどが報告されているが、なお不十分であ
る。2. Description of the Related Art Generally, a coating agent is a dispersion of refractory aggregates such as zircon, magnesia, silica, alumina, graphite and the like in a solvent. Cannot obtain a stable casting. For the improvement, those containing a surfactant and cellulose ether described in JP-A-1-224136, those containing an alkylene oxide adduct of alkylated cellulose described in Patent No. 2647856, and the like have been reported. Still not enough.
【０００２】[0002]
【発明が解決しようとする課題】本発明は、分散安定性
に優れ、塗膜強度も十分で品質の安定した鋳物が得られ
る塗型剤の提供を課題とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a coating composition which is excellent in dispersion stability, has sufficient coating strength, and is capable of producing a casting of stable quality.
【０００３】[0003]
【課題を解決するための手段】本発明は、ＢＥＴ比表面
積が30〜400m2/gのシリカ微粉末を含有する鋳造用塗型
剤組成物である。本発明の塗型剤組成物は、通常使用さ
れている塗型剤と同様に、耐火骨材、溶剤、及び必要に
応じて粘結剤、添加剤等からなるものであるが、このシ
リカ微粉末は添加剤の一種として配合される。SUMMARY OF THE INVENTION The present invention is a mold wash composition containing a fine silica powder having a BET specific surface area of 30 to 400 m 2 / g. The coating composition of the present invention comprises a refractory aggregate, a solvent, and, if necessary, a binder, an additive, and the like, similarly to a commonly used coating composition. The powder is blended as one of the additives.
【０００４】一般に、塗型剤中の耐火骨材であるジルコ
ン、マグネシア、シリカ、アルミナ、黒鉛等の平均粒子
径は約１〜100μm（ＢＥＴ比表面積は通常10m2/g以下）
である。平均粒子径を小さくすれば分散安定性は一般に
向上するが、鋳型へ過剰に浸透し、被覆量の制御が困難
となる。本発明は、耐火骨材の粒子径の制御ではなく、
ＢＥＴ比表面積が30〜400m2/g、好ましくは50〜200m2/g
のシリカ微粉末を配合することにより、分散安定性の向
上を図ったものである。Generally, the average particle size of refractory aggregates such as zircon, magnesia, silica, alumina, graphite, etc., in the coating composition is about 1 to 100 μm (BET specific surface area is usually 10 m 2 / g or less).
It is. If the average particle size is reduced, the dispersion stability is generally improved, but excessively penetrates into the mold, making it difficult to control the coating amount. The present invention is not a control of the particle size of the refractory aggregate,
BET specific surface area is 30 to 400 m 2 / g, preferably 50 to 200 m 2 / g
The dispersion stability is improved by blending the silica fine powder of the above.
【０００５】[0005]
【発明の実施の形態】上記のシリカ微粉末の添加量は、
分散安定性を向上させると共に所望の塗膜強度を得る観
点から、塗型剤中の耐火骨材100重量部に対し0.5〜20重
量部が好ましい。より好ましくは１〜10重量部、特に好
ましくは２〜５重量部である。BEST MODE FOR CARRYING OUT THE INVENTION
From the viewpoint of improving the dispersion stability and obtaining the desired coating film strength, the amount is preferably 0.5 to 20 parts by weight based on 100 parts by weight of the refractory aggregate in the coating composition. It is more preferably 1 to 10 parts by weight, particularly preferably 2 to 5 parts by weight.
【０００６】本発明の塗型剤組成物に含まれる耐火骨材
としては、ジルコン、シリカ、マグネシア、アルミナ、
シャモット、粘土鉱物、黒鉛等の粉末が挙げられる。こ
れら耐火骨材は鋳物の焼着防止を主目的とする。The refractory aggregate contained in the coating composition of the present invention includes zircon, silica, magnesia, alumina,
Examples include powders of chamotte, clay mineral, graphite, and the like. The main purpose of these refractory aggregates is to prevent burning of the casting.
【０００７】塗型剤組成物の溶媒としては、油性塗型剤
の場合は、メタノール、エタノール、イソプロピルアル
コール等のアルコール類、キシレン、トルエン等の芳香
族溶剤、ミネラルスピリット等の炭化水素系溶剤が使用
できる。一般にはアルコール類が主溶剤として使用さ
れ、芳香族溶剤及び炭化水素系溶剤は補助溶剤として使
用される。水性塗型剤の場合は水が主溶媒となる。添加
量は耐火骨材100重量部に対し、10〜100重量部が好まし
い。[0007] Solvents for the coating composition include, in the case of oil-based coating compositions, alcohols such as methanol, ethanol and isopropyl alcohol, aromatic solvents such as xylene and toluene, and hydrocarbon solvents such as mineral spirits. Can be used. Generally, alcohols are used as main solvents, and aromatic solvents and hydrocarbon solvents are used as auxiliary solvents. In the case of an aqueous coating composition, water is the main solvent. The addition amount is preferably 10 to 100 parts by weight based on 100 parts by weight of the refractory aggregate.
【０００８】本発明の塗型剤組成物には、通常使用され
るような粘結剤を配合できる。例えば、常温で強い塗膜
を形成できるフェノール、ロジン、石油樹脂のような有
機粘結剤や、鋳込み時に塗膜の熱間強度を上げるための
ベントナイト、エチルシリケート、ケイ酸ソーダなどの
無機粘結剤がある。条件によりこれらのものを併用して
もよい。添加量は耐火骨材100重量部に対し、0.5〜10重
量部が好ましい。[0008] The coating composition of the present invention may contain a binder as usually used. For example, organic binders such as phenol, rosin, and petroleum resins that can form strong coatings at room temperature, and inorganic binders such as bentonite, ethyl silicate, and sodium silicate to increase the hot strength of coatings during casting. There are agents. These may be used in combination depending on the conditions. The addition amount is preferably 0.5 to 10 parts by weight based on 100 parts by weight of the refractory aggregate.
【０００９】また本発明の塗型剤組成物には、上記シリ
カ微粉末に加え、特許第2647856号に記載されたアルキ
ル化セルロースのアルキレンオキサイド付加物などの増
粘剤など他の添加剤も併用できる。[0009] In addition to the above silica fine powder, the coating composition of the present invention also contains other additives such as a thickener such as an alkylene oxide adduct of alkylated cellulose described in Japanese Patent No. 2647856. it can.
【００１０】[0010]
【実施例】耐火骨材、粘結剤、溶媒及び増粘剤を表１に
示す種類及び量で用い、これに対して表２に示す種類及
び量の添加物を加え、塗型剤組成物を調製した。なお表
２の添加量は、表１の耐火骨材100重量部に対する重量
部である。EXAMPLES A refractory aggregate, a binder, a solvent and a thickener were used in the types and amounts shown in Table 1, and the types and amounts of additives shown in Table 2 were added thereto. Was prepared. The addition amounts in Table 2 are parts by weight based on 100 parts by weight of the refractory aggregate in Table 1.
【００１１】[0011]
【表１】 [Table 1]
【００１２】得られた塗型剤組成物を十分に攪拌後にガ
ラス製沈降管（直径25mm、深さ25cm）に20cmの深さまで
注ぎ、衝撃、振動のない安定な場所に放置し、１時間、
２時間、及び24時間後の上澄み液の深さを測定して分散
安定性を評価した。またこれらの塗型剤組成物をフラン
樹脂（フルフリルアルコール・尿素・ホルムアルデヒド
重縮合物）で硬化させた砂型に塗布し、直後に着火、30
分間放置して得られた塗膜を鉛筆（ＨＢ）で引っかき、
以下により塗膜強度を測定した。After sufficiently stirring the obtained coating composition, it is poured into a glass sedimentation tube (diameter 25 mm, depth 25 cm) to a depth of 20 cm, and left in a stable place without impact or vibration for 1 hour.
The dispersion stability was evaluated by measuring the depth of the supernatant after 2 hours and 24 hours. The composition was applied to a sand mold cured with a furan resin (furfuryl alcohol / urea / formaldehyde polycondensate) and immediately ignited.
For 2 minutes, scratch the coating film with a pencil (HB),
The coating film strength was measured as follows.
【００１３】 ○：塗膜が剥離しない △：塗膜が少し剥離する ×：塗膜が剥離し砂型表面が見える 以上の結果を表２に示す。：: The coating film is not peeled off Δ: The coating film is peeled off a little ×: The coating film is peeled off and the sand mold surface is visible The above results are shown in Table 2.
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【発明の効果】本発明の塗型剤組成物は、ごく少量の添
加で分散安定性を改善でき、十分な塗膜強度も得られ
る。According to the present invention, the coating composition of the present invention can be improved in dispersion stability by adding a very small amount, and a sufficient coating strength can be obtained.
Claims (2)
微粉末を含有する鋳造用塗型剤組成物。1. A casting coating composition containing a fine silica powder having a BET specific surface area of 30 to 400 m 2 / g.
物中の耐火骨材100重量部に対し0.5〜20重量部である、
請求項１の鋳造用塗型剤組成物。2. The content of the silica fine powder is 0.5 to 20 parts by weight based on 100 parts by weight of the refractory aggregate in the coating composition.
The coating composition for casting according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23050398A JP3801788B2 (en) | 1998-08-17 | 1998-08-17 | Casting composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23050398A JP3801788B2 (en) | 1998-08-17 | 1998-08-17 | Casting composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000051994A true JP2000051994A (en) | 2000-02-22 |
| JP3801788B2 JP3801788B2 (en) | 2006-07-26 |
Family
ID=16908793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23050398A Expired - Fee Related JP3801788B2 (en) | 1998-08-17 | 1998-08-17 | Casting composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3801788B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108054A (en) * | 2015-09-28 | 2015-12-02 | 山东永和精密金属有限公司 | Transition layer coating for manufacturing shell of precision casting and preparation method of transition layer coating |
| CN107442741A (en) * | 2017-08-21 | 2017-12-08 | 马鞍山市三川机械制造有限公司 | A kind of preparation method of high-quality cast paint |
| CN114180992A (en) * | 2021-11-16 | 2022-03-15 | 山东山科生态环境研究院有限公司 | Powder falling prevention film covering agent for vitrified aggregate biscuit, film covering system and film covering method |
-
1998
- 1998-08-17 JP JP23050398A patent/JP3801788B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108054A (en) * | 2015-09-28 | 2015-12-02 | 山东永和精密金属有限公司 | Transition layer coating for manufacturing shell of precision casting and preparation method of transition layer coating |
| CN105108054B (en) * | 2015-09-28 | 2016-05-04 | 山东永和精密金属有限公司 | A kind of precision casting transition zone coating and its preparation method and application for shell processed |
| CN107442741A (en) * | 2017-08-21 | 2017-12-08 | 马鞍山市三川机械制造有限公司 | A kind of preparation method of high-quality cast paint |
| CN114180992A (en) * | 2021-11-16 | 2022-03-15 | 山东山科生态环境研究院有限公司 | Powder falling prevention film covering agent for vitrified aggregate biscuit, film covering system and film covering method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3801788B2 (en) | 2006-07-26 |
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