JPS6251700B2 - - Google Patents
Info
- Publication number
- JPS6251700B2 JPS6251700B2 JP2011781A JP2011781A JPS6251700B2 JP S6251700 B2 JPS6251700 B2 JP S6251700B2 JP 2011781 A JP2011781 A JP 2011781A JP 2011781 A JP2011781 A JP 2011781A JP S6251700 B2 JPS6251700 B2 JP S6251700B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- sodium
- coating material
- present
- 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
Links
- 239000000463 material Substances 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 239000011734 sodium Substances 0.000 claims description 20
- 229910052708 sodium Inorganic materials 0.000 claims description 19
- -1 sodium alkyl sulfonate Chemical class 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 18
- 239000003945 anionic surfactant Substances 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000002244 precipitate Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000344 soap Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241000218641 Pinaceae Species 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000573 anti-seizure effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229940036248 turpentine Drugs 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002888 zwitterionic surfactant Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/205—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of organic silicon or metal compounds, other organometallic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
本発明は、長時間安定して保存することのでき
る鋳型用塗型材に関するものである。
従来、鋳型用塗型材として、耐火物粉末100重
量部に対し、シリカ分0.3〜0.8重量部を析出する
エチルシリケート加水分解液と１〜５重量部のコ
ロフオニウムとを含むアルコール溶液を配合した
ものが提案されている（特願昭52−94976号参
照）。
上記塗型材は、乾燥後および注湯時に亀裂が生
じたり、剥離することがなく、しかも溶湯に対し
化学的および熱的に安定であることから、溶湯の
浸入や焼着に大きな防止効果を持つている。その
ため、特に中、大型の鋳物に多く発生していた溶
湯の砂粒間への浸入がなくなり、砂落とし工数の
大幅な低減、作業環境の改善に大きな効果が得ら
れていた。
このように、上記塗型材は非常に優れた焼着防
止効果をもつものであるが、唯一の欠点として保
存中に耐火物粉末が硬質の沈降層として分離する
傾向があつた。この傾向は、ジルコン等のように
特に比重の大きなものを耐火物粉末として使用し
た場合に顕著であり、作業者は使用前に専用の撹
拌機等によつて十分に撹拌して使用しなければな
らなかつた。
本発明は上記欠点の解消を目的としてなされた
もので、耐火物粉末、エチルシリケート加水分解
液、コロフオニウム、アルコールからなる組成物
に対し、アルキルスルホン酸ナトリウム系又はア
ルキルアリールスルホン酸ナトリウム系の陰イオ
ン界面活性剤を前記耐火物粉末100重量部当り
0.05〜1.0重量部となるように配合したことを特
徴とする鋳型用塗型材に関するものである。
本発明塗型材は、従来から使用されている耐火
物粉末、エチルシリケート加水分解液、コロフオ
ニウム、アルコールに、アルキルスルホン酸ナト
リウム系又はアルキルアリールスルホン酸ナトリ
ウム系の陰イオン界面活性剤を添加したものであ
る。以下、各構成成分について説明する。
(1) 耐火物粉末：
焼着防止効果を得るためには膨張率が少ない
ジルコンまたはムライト等を主成分とする粉末
の使用が適している。なお、鋳鉄や非鉄金属な
ど融点の低いものを鋳込む場合には、硅砂や黒
鉛等も使用することができる。
(2) エチルシリケート加水分解液：
エチルシリケートはエトキシ基とシリカより
なる無色透明の油状液体で、粘結作用のない安
定な物質であるが、酸性物質存在下でアルコー
ルおよび水と混合し撹拌することにより加水分
解液となり粘結性能をもつているものである。
(3) コロフオニウム：
別名ロジンともいう。マツ科の樹幹から分泌
するテルペンチンを蒸留し、揮発性のテルペン
油を除いた残りの樹脂である。
(4) アルコール：
前記エチルシリケート加水分解液及びコロフ
オニウムの共通溶媒である。
５ アルキルスルホン酸ナトリウム系又はアルキ
ルアリールスルホン酸ナトリウム系の陰イオン
界面活性剤：
上記(1)〜(4)を配合したものが従来の塗型材で
あるが、この従来の塗型材では前述のように保
存中に耐火物粉末が硬質の沈澱層として分離す
る傾向がある。これを改善するための添加物が
アルキルスルホン酸ナトリウム系又はアルキル
アリールスルホン酸ナトリウム系の陰イオン界
面活性剤である。
界面活性剤は、水溶液になつた場合に界面活
性を示す部分の性質から、陰イオン界面活性
剤、陽イオン界面活性剤、両性イオン界面活性
剤、非イオン界面活性剤の４種類に大別され
る。
本発明において、これらの界面活性剤について
試験を行つた結果、陰イオン界面活性剤を除く３
種類のものは、前記(1)〜(4)を配合した従来の塗型
材に添加しても効果はなく、耐火物粉末が硬質の
沈澱層として分離する傾向を改善できなかつた。
陰イオン界面活性剤は、その組成等から多くの
種類に分類されている。本発明では、このうちア
ルキルスルホン酸ナトリウム系又はアルキルアリ
ールスルホン酸ナトリウム系のものを選択した。
これは、硫酸化していないもの、例えば脂肪酸ア
ルカリ塩や金属石ケン、有機塩基石ケン等の石ケ
ン類は、比較的弱酸と強塩基とから作られている
塩であるため水溶液ではアルカリ性となり、従来
の塗型材に添加した場合、粘結剤であるエチルシ
リケート加水分解液のゲル化を促進する作用があ
り、このため塗型材は短期間で液が固化し使用で
きなくなるからである。また、ナトリウム基をも
たないもの、つまりカルシウム等で硫酸塩とした
リグニンスルホン酸カルシウム等では、従来の塗
型材に添加した場合の分散効果が少ない欠点があ
るからである。
本発明で使用するアルキルスルホン酸ナトリウ
ム系又はアルキルアリールスルホン酸ナトリウム
系の陰イオン界面活性剤として、具体的に次のよ
うなものがあげられる。ドデシルベンゼンスルホ
ン酸ナトリウム
The present invention relates to a mold coating material that can be stably stored for a long period of time. Conventionally, mold coating materials have been prepared by blending 100 parts by weight of refractory powder with an ethyl silicate hydrolyzate that precipitates 0.3 to 0.8 parts by weight of silica and an alcohol solution containing 1 to 5 parts by weight of colophonium. It has been proposed (see Japanese Patent Application No. 52-94976). The above-mentioned mold coating material does not crack or peel after drying or during pouring, and is chemically and thermally stable against molten metal, so it has a great effect on preventing molten metal from penetrating and seizing. ing. As a result, the penetration of molten metal between the sand grains, which often occurs in medium and large castings, has been eliminated, resulting in a significant reduction in the number of man-hours required for sand removal and an improvement in the working environment. As described above, the mold coating material has an extremely excellent anti-seizing effect, but its only drawback is that the refractory powder tends to separate as a hard sedimentary layer during storage. This tendency is noticeable when materials with particularly high specific gravity such as zircon are used as refractory powder, and workers must thoroughly stir the powder using a special stirrer or the like before use. It didn't happen. The present invention was made with the aim of eliminating the above-mentioned drawbacks, and the present invention was made with the aim of solving the above-mentioned drawbacks. Surfactant per 100 parts by weight of the refractory powder
The present invention relates to a coating material for a mold, characterized in that it is blended in an amount of 0.05 to 1.0 parts by weight. The mold coating material of the present invention is made by adding a sodium alkylsulfonate-based or sodium alkylarylsulfonate-based anionic surfactant to the conventionally used refractory powder, ethyl silicate hydrolyzate, colophonium, and alcohol. be. Each component will be explained below. (1) Refractory powder: In order to obtain the anti-seizure effect, it is suitable to use a powder whose main component is zircon or mullite, etc., which have a low expansion coefficient. In addition, when casting materials with low melting points such as cast iron and non-ferrous metals, silica sand, graphite, etc. can also be used. (2) Ethyl silicate hydrolyzate: Ethyl silicate is a colorless and transparent oily liquid consisting of ethoxy groups and silica, and is a stable substance with no caking effect, but it can be mixed with alcohol and water in the presence of acidic substances and stirred. As a result, it becomes a hydrolyzed liquid and has caking properties. (3) Colophonium: Also called rosin. Turpentine secreted from the trunk of a Pinaceae tree is distilled, and the remaining resin is obtained by removing volatile terpene oil. (4) Alcohol: A common solvent for the ethyl silicate hydrolyzate and colophonium. 5 Sodium alkyl sulfonate-based or sodium alkylaryl sulfonate-based anionic surfactants: Conventional mold coating materials are those containing the above (1) to (4). During storage, refractory powder tends to separate as a hard precipitate layer. An additive to improve this problem is an anionic surfactant based on sodium alkylsulfonate or sodium alkylarylsulfonate. Surfactants are broadly classified into four types: anionic surfactants, cationic surfactants, zwitterionic surfactants, and nonionic surfactants, based on the nature of the part that exhibits surface activity when turned into an aqueous solution. Ru. In the present invention, as a result of testing these surfactants, 3 except for anionic surfactants
Even when these types were added to conventional coating materials containing the above-mentioned (1) to (4), there was no effect, and the tendency of the refractory powder to separate as a hard precipitate layer could not be improved. Anionic surfactants are classified into many types based on their composition. In the present invention, among these, a sodium alkylsulfonate type or a sodium alkylarylsulfonate type was selected.
This is because soaps that are not sulfated, such as alkali fatty acid salts, metal soaps, and organic base soaps, are salts made from relatively weak acids and strong bases, so they become alkaline in aqueous solution. When added to conventional mold coating materials, it has the effect of promoting gelation of the ethyl silicate hydrolyzed solution, which is a binder, and as a result, the mold coating material becomes solidified in a short period of time and becomes unusable. In addition, substances that do not have a sodium group, such as calcium lignin sulfonate made into a sulfate with calcium or the like, have the disadvantage that they have little dispersion effect when added to conventional mold coating materials. Specific examples of the sodium alkylsulfonate-based or sodium alkylarylsulfonate-based anionic surfactants used in the present invention include the following. Sodium dodecylbenzenesulfonate
【式】オ
レオイルメチルタウリン酸ナトリウム
（C17H33CONC2H4SO3Na）、リグニンスルホン酸
ナトリウム等である。なおこれらは本発明の１例
を示すものであり、これにより限定されるもので
はない。
本発明塗型材は、上記(5)のアルキルスルホン酸
ナトリウム系又はアルキルアリールスルホン酸ナ
トリウム系の陰イオン界面活性剤を、上記(1)〜(4)
からなる組成物に対し、上記(1)の耐火物粉末100
重量部当り0.05〜1.0重量部となるように添加す
ればよい。これは、0.05重量部以下では保存中に
耐火物粉末が沈澱層として分離する傾向を改善で
きず、1.0重量部以上では塗型材の粘性が上がる
ため鋳型への浸透が不充分となつて乾燥後および
注湯時に亀裂が生じたり剥離することが多くな
り、本発明の本来の目的である溶湯の浸入や焼着
に対する防止効果がなくなるからである。
また、本発明塗型材においては、上記(1)〜(4)の
それぞれの添加量は、(1)の耐火物粉末100重量部
に対し、一般に次の通りとすればよい。
(2)のエチルシリケート加水分解液：析出するシリ
カ分0.3〜1.2重量部
0.3重量部以下では溶湯に対する化学的、熱的
な安定性に乏しく、溶湯の浸入を防止できない。
また、上限は従来の塗型材では0.8重量部以上で
あると、乾燥後および注湯時に亀裂が生じたり、
剥離する恐れがあつたが、本発明塗型材ではアル
キルスルホン酸ナトリウム系又はアルキルアリー
ルスルホン酸ナトリウム系の陰イオン界面活性剤
の添加により耐火物粉末との濡れ性が改善され、
その結果1.2重量部までは亀裂や剥離現象が生じ
ない。
(3)のコロフオニウム：１〜５重量部
１重量部以下では塗膜の室温における強度を維
持できないため剥離し易すくなり、また５重量部
以上では塗膜の耐熱性が不充分となり焼着が発生
し易すくなる。
(4)のアルコール：15〜40重量部程度
塗布する鋳型の条件によつて決められるもので
あるが、技術的には塗型材が塗布できる状態、す
なわちスラリー化する15〜20重量部を下限とし、
上限については特に限定はない。一般には25〜40
重量部程度が好ましい。
なお、従来の塗型材は前記したようにエチルシ
リケート加水分解液とコロフオニウムとアルコー
ルとを予め混合したものを耐火物粉末に配合して
いたが、本発明ではアルキルスルホン酸ナトリウ
ム系又はアルキルアリールスルホン酸ナトリウム
系の陰イオン界面活性剤の添加により分散性が良
好となるため、予め上記のようなアルコール溶液
を作る必要はなく、全成分を同時に配合すること
もできる。
以上説明した本発明塗型材は、前記した従来の
塗型材の唯一の欠点であつた保存中に耐火物粉末
が硬質の沈降層として分離する傾向を改善する効
果があり、そのため保存安定性が向上し、作業者
が使用前に専用の撹拌機等を用いて撹拌する必要
がないという利点がある。[Formula] Sodium oleoylmethyltaurate (C 17 H 33 CONC 2 H 4 SO 3 Na), sodium lignin sulfonate, etc. Note that these are examples of the present invention, and the present invention is not limited thereto. The mold coating material of the present invention uses the sodium alkylsulfonate or sodium alkylarylsulfonate anionic surfactant described in (5) above, and the anionic surfactant described in (1) to (4) above.
100% of the refractory powder of (1) above for a composition consisting of
It may be added in an amount of 0.05 to 1.0 parts by weight per part by weight. This is because if it is less than 0.05 parts by weight, the tendency of the refractory powder to separate as a precipitate layer during storage cannot be improved, and if it is more than 1.0 parts by weight, the viscosity of the mold coating material increases, resulting in insufficient penetration into the mold, and after drying. This is because cracks often occur or peeling occurs during pouring, and the effect of preventing molten metal from entering or burning, which is the original purpose of the present invention, is lost. In addition, in the mold coating material of the present invention, the amounts of each of the above (1) to (4) may be generally set as follows relative to 100 parts by weight of the refractory powder (1). (2) Ethyl silicate hydrolyzed solution: 0.3 to 1.2 parts by weight of precipitated silica. If it is less than 0.3 parts by weight, it will have poor chemical and thermal stability against molten metal, and it will not be possible to prevent the intrusion of molten metal.
In addition, if the upper limit is 0.8 parts by weight or more for conventional mold coating materials, cracks may occur after drying and during pouring.
However, in the coating material of the present invention, the wettability with the refractory powder was improved by adding a sodium alkylsulfonate-based or sodium alkylarylsulfonate-based anionic surfactant.
As a result, no cracking or peeling phenomenon occurs up to 1.2 parts by weight. (3) Colophonium: 1 to 5 parts by weight If it is less than 1 part by weight, the strength of the coating film cannot be maintained at room temperature and it will easily peel off, and if it is more than 5 parts by weight, the heat resistance of the coating film will be insufficient and baking will occur. It is more likely to occur. (4) Alcohol: Approximately 15 to 40 parts by weight This is determined by the conditions of the mold to be coated, but technically the lower limit is 15 to 20 parts by weight when the mold material can be coated, that is, it becomes a slurry. ,
There is no particular limit on the upper limit. Generally 25-40
Parts by weight are preferred. In addition, as mentioned above, conventional mold coating materials have been blended with refractory powder by pre-mixing ethyl silicate hydrolyzate, colophonium, and alcohol, but in the present invention, sodium alkylsulfonate or alkylarylsulfonic acid is used. Since dispersibility is improved by adding a sodium-based anionic surfactant, there is no need to prepare an alcohol solution as described above in advance, and all components can be blended at the same time. The mold coating material of the present invention described above has the effect of improving the tendency of the refractory powder to separate as a hard sedimentary layer during storage, which was the only drawback of the conventional mold coating material described above, and therefore, the storage stability is improved. However, it has the advantage that there is no need for the operator to stir it using a dedicated stirrer or the like before use.
Claims (1)
コロフオニウム、アルコールからなる組成物に対
し、アルキルスルホン酸ナトリウム系又はアルキ
ルアリールスルホン酸ナトリウム系の陰イオン界
面活性剤を前記耐火物粉末100重量部当り0.05〜
1.0重量部となるように配合したことを特徴とす
る鋳型用塗型材。1 Fireproof powder, ethyl silicate hydrolyzate,
0.05 to 0.05 parts by weight of a sodium alkyl sulfonate-based or sodium alkylaryl sulfonate-based anionic surfactant per 100 parts by weight of the refractory powder to a composition consisting of colophonium and alcohol.
A coating material for molds, characterized in that it is blended at a concentration of 1.0 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011781A JPS57137054A (en) | 1981-02-16 | 1981-02-16 | Mold coating material for mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011781A JPS57137054A (en) | 1981-02-16 | 1981-02-16 | Mold coating material for mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57137054A JPS57137054A (en) | 1982-08-24 |
| JPS6251700B2 true JPS6251700B2 (en) | 1987-10-31 |
Family
ID=12018173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011781A Granted JPS57137054A (en) | 1981-02-16 | 1981-02-16 | Mold coating material for mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57137054A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586853A (en) * | 2019-09-25 | 2019-12-20 | 浙江鸿峰重工机械有限公司 | Special coating for casting |
| CN114799041B (en) * | 2022-05-07 | 2023-08-01 | 安徽大天铸业有限责任公司 | Casting inner runner precoated sand core paint and preparation method thereof |
-
1981
- 1981-02-16 JP JP2011781A patent/JPS57137054A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57137054A (en) | 1982-08-24 |
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