JPS62279048A - Composition for self-curing binder for casting - Google Patents
Composition for self-curing binder for castingInfo
- Publication number
- JPS62279048A JPS62279048A JP12030386A JP12030386A JPS62279048A JP S62279048 A JPS62279048 A JP S62279048A JP 12030386 A JP12030386 A JP 12030386A JP 12030386 A JP12030386 A JP 12030386A JP S62279048 A JPS62279048 A JP S62279048A
- Authority
- JP
- Japan
- Prior art keywords
- self
- water
- composition
- alkali metal
- casting
- 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.)
- Pending
Links
- 239000011230 binding agent Substances 0.000 title claims abstract description 20
- 239000000203 mixture Substances 0.000 title claims abstract description 16
- 238000005266 casting Methods 0.000 title claims abstract description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 48
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 42
- 239000005011 phenolic resin Substances 0.000 claims abstract description 31
- 239000003054 catalyst Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 9
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 9
- 150000002895 organic esters Chemical class 0.000 claims abstract description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 19
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 18
- 238000003860 storage Methods 0.000 abstract description 7
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 abstract description 3
- 229910001863 barium hydroxide Inorganic materials 0.000 abstract description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract description 3
- 239000000920 calcium hydroxide Substances 0.000 abstract description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 229920005989 resin Polymers 0.000 description 15
- 239000011347 resin Substances 0.000 description 15
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 14
- 239000007788 liquid Substances 0.000 description 14
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000007849 furan resin Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical compound CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- HXDLWJWIAHWIKI-UHFFFAOYSA-N 2-hydroxyethyl acetate Chemical compound CC(=O)OCCO HXDLWJWIAHWIKI-UHFFFAOYSA-N 0.000 description 1
- 102100039401 Gap junction beta-6 protein Human genes 0.000 description 1
- 239000004348 Glyceryl diacetate Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 description 1
- 229940092714 benzenesulfonic acid Drugs 0.000 description 1
- 229930188620 butyrolactone Natural products 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940116333 ethyl lactate Drugs 0.000 description 1
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 description 1
- 235000019443 glyceryl diacetate Nutrition 0.000 description 1
- 239000001087 glyceryl triacetate Substances 0.000 description 1
- 235000013773 glyceryl triacetate Nutrition 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- -1 silane compound Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
【産業上の利用分野〕
本発明は鋳造に必要な砂鋳型造型用の自硬性結合剤組成
物に関し、特に常温で硬化し、低粘性。Detailed Description of the Invention 3. Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a self-hardening binder composition for sand mold making necessary for casting, particularly a self-hardening binder composition that hardens at room temperature and has a low viscosity.
貯蔵安定性９強度性能に優れた鋳物用自硬性結合剤組成
物に関するものである。This invention relates to a self-hardening binder composition for castings that has excellent storage stability and strength performance.
鋳物鋳型抄造型用の常温自硬性結合剤としては、酸硬化
タイプのフラン樹脂、フェノール樹脂が主流を占めてい
る。As room-temperature self-hardening binders for casting molds, acid-curing type furan resins and phenolic resins are the mainstream.
フラン樹脂は、通常フルフリルアルコールーユリャホル
ムアルデヒド樹脂が、またフェノール樹脂は、水溶性の
フェノールホルムアルデヒド樹脂が一般的に用いられて
いる。そして、これらの樹脂に対する硬化剤として、強
酸類である硫酸、ベンゼンスルフォン酸等が使用されて
いる。As the furan resin, furfuryl alcohol-yellow formaldehyde resin is generally used, and as the phenol resin, water-soluble phenol formaldehyde resin is generally used. As curing agents for these resins, strong acids such as sulfuric acid and benzenesulfonic acid are used.
一方、アルカリ性フェノール樹脂水溶液を有機エステル
系硬化剤により硬化させる方法も特開昭５０−１３０６
２７号（鋳型の製造方法）及び特開昭５８−１５４４３
３号（鋳型及び中子）において知られている。On the other hand, a method of curing an alkaline phenol resin aqueous solution with an organic ester curing agent is also disclosed in JP-A-50-1306.
No. 27 (Mold manufacturing method) and JP-A-58-15443
No. 3 (molds and cores).
有機系結合剤は無機系結合剤に比較して、造型スピード
が速く、寸法精度が良好であり、使用砂が再生可能であ
る等、多くの利点があり急速に普及しつ＼ある。しかし
ながら、有機系結合剤は無機系に比較して耐熱性が劣り
、注湯時の分解ガス発生量が多いことに起因したガス欠
陥があるため、出来る限り低粘性で砂に対する濡れ性を
改善し、樹脂添加量を低減し、なおかつ高強度を発現さ
せることが必要である。Organic binders have many advantages over inorganic binders, such as faster molding speed, better dimensional accuracy, and recyclable sand, and are rapidly becoming popular. However, organic binders have inferior heat resistance compared to inorganic binders and have gas defects due to the large amount of decomposed gas generated during pouring. It is necessary to reduce the amount of resin added and still exhibit high strength.
特に、フェノール樹脂はフラン樹脂と比較して粘性が高
く、冬場は増粘のため混線供給時のポンプアップが不能
となったり、夏場は貯蔵安定性が悪く、実用的には２週
間程度の安定性しかないという問題点を持っている。こ
の為、低粘性で貯蔵安定性に優れ、かつ強度性能が良好
な結合剤の開発が切望されている。In particular, phenolic resin has a higher viscosity than furan resin, and in the winter, the viscosity increases, making it impossible to pump up during cross-current supply, and in the summer, storage stability is poor, and in practical terms, it is only stable for about two weeks. The problem is that it only has sex. For this reason, there is a strong desire to develop a binder that has low viscosity, excellent storage stability, and good strength performance.
本発明者らは前記した問題点を解決すべく鋭意研究を重
ねた結果、水溶性フェノール樹脂をエステル系硬化剤で
硬化させる鋳物用自硬性結合剤において、低粘性、貯蔵
安定性に優れ、かつ強度性能も良好に維持する水溶性フ
ェノール樹脂を見い出し、本発明を完成するに至った。The present inventors have conducted intensive research to solve the above-mentioned problems, and as a result, we have developed a self-hardening binder for castings that hardens water-soluble phenolic resin with an ester hardening agent, which has low viscosity, excellent storage stability, and We have discovered a water-soluble phenolic resin that also maintains good strength performance, and have completed the present invention.
（問題点を解決するための手段）
本発明を概説すれば、本発明は水溶性フェノール樹脂と
有機エステル系硬化剤とから成る鋳物用自硬性結合剤組
成物において、前記水溶性フェノール樹脂が少くとも２
種のアルカリ金属塩基性触媒を用いて調製される水溶性
フェノール樹脂であることを特徴とする鋳物用自硬性結
合剤組成物に関するものである。(Means for Solving the Problems) To summarize the present invention, the present invention provides a self-hardening binder composition for castings comprising a water-soluble phenolic resin and an organic ester curing agent, in which the water-soluble phenolic resin is contained in a small amount. Tomo 2
The present invention relates to a self-hardening binder composition for foundries, characterized in that it is a water-soluble phenolic resin prepared using a basic alkali metal catalyst.
以下、本発明の構成について詳しく説明する。Hereinafter, the configuration of the present invention will be explained in detail.
本発明で使用する水溶性フェノール樹脂成分は、ホルム
アルデヒドとフェノールのモル比が１．０〜３．０のも
の、好ましくは１．５〜２．０モルの範囲のものである
。The water-soluble phenolic resin component used in the present invention has a formaldehyde to phenol molar ratio of 1.0 to 3.0, preferably 1.5 to 2.0 mol.
そして本発明で使用する水溶性フェノール樹脂成分は、
その調製時に触媒として水酸化ナトリウム、水酸化カリ
ウム等のアルカリ金属系、水酸化カルシウム、水酸化バ
リウム等のアルカリ土類金属系より選ばれた２種のアル
カリ金属塩基性混合触媒を用いて調製されたものである
。The water-soluble phenolic resin component used in the present invention is
During its preparation, two kinds of alkali metal basic mixed catalysts selected from alkali metals such as sodium hydroxide and potassium hydroxide, and alkaline earth metals such as calcium hydroxide and barium hydroxide are used as catalysts. It is something that
単独触媒の場合、例えば水酸化ナトリウム、水酸化カル
シウム、水酸化バリウム等の単独使用の場合はフェノー
ル樹脂を合成する時に粘度上昇が激しかったり、又、水
酸化カリウム単独使用の場合は、樹脂の合成時には問題
ないが鋳型造型時の強度が低くかつ、可使時間が極端に
短縮される等の欠点がある。また、触媒使用量が少量過
ぎると樹脂合成時の粘度上昇が激しく、逆に多量過すぎ
ると樹脂の有効成分が減少し強度性能が低下してしまう
。In the case of a single catalyst, for example, when sodium hydroxide, calcium hydroxide, barium hydroxide, etc. are used alone, the viscosity increases sharply when synthesizing phenol resin, and when potassium hydroxide is used alone, the resin synthesis Although sometimes there are no problems, there are drawbacks such as low strength during mold making and extremely short pot life. Furthermore, if the amount of catalyst used is too small, the viscosity increases sharply during resin synthesis, while if the amount is too large, the effective components of the resin will decrease and the strength performance will deteriorate.
触媒使用量はフェノールに対して０．５〜１．０モル。The amount of catalyst used is 0.5 to 1.0 mol based on phenol.
水酸化カリウム／水酸化ナトリウムの使用割合は１７１
〜４／ｌ（モル比）の範囲である。Potassium hydroxide/sodium hydroxide usage ratio is 171
~4/l (molar ratio).
本発明で使用する水溶性フェノール樹脂液のＰＨは１０
〜１３位が好ましく、ＰＨが低く過ぎるとエステル系硬
化剤を加えた時、硬化が非常に遅くなる。The pH of the water-soluble phenol resin liquid used in the present invention is 10.
-13th position is preferred; if the pH is too low, curing will be extremely slow when an ester curing agent is added.
本発明で使用する硬化剤としての有機エステル成分には
、ギ酸メチル、ギ酸エチル、酢酸エチル、乳酸エチル、
ブチロラクトン、カプロラクトン。Organic ester components used as curing agents in the present invention include methyl formate, ethyl formate, ethyl acetate, ethyl lactate,
Butyrolactone, caprolactone.
エチレングリコールモノアセテート、エチレングリコー
ルジアセテート、ジアセチン、トリアセチン等がある。Examples include ethylene glycol monoacetate, ethylene glycol diacetate, diacetin, and triacetin.
この中で、強度性能を考慮するとガンマ−ブチロラクト
ンが最も好ましいものである。Among these, gamma-butyrolactone is the most preferred in terms of strength performance.
本発明になる鋳物用自硬性結合剤組成物は、前記した水
溶性フェノール樹脂成分と有機エステル系硬化剤成分を
必須とするものであるが、この他強度性能を改善する目
的でシラン化合物（例えばガンマ−アミノプロピル ト
リエトキシシラン）などを配合しても良い。The self-hardening binder composition for foundries according to the present invention essentially contains the water-soluble phenolic resin component and the organic ester curing agent component described above, but it also contains a silane compound (e.g. Gamma-aminopropyl triethoxysilane) or the like may be added.
（実 施 例） 以下、本発明を実施例により更に詳しく説明する。(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例１
フェノール４７０部と４２％ホルマリン７１４部（Ｆ／
Ｐモル比＝２）を温度計、冷却器、および撹拌機を備え
たフラスコに仕込み、反応触媒として４８％水酸化カリ
ウム２６３部と４８％水酸化ナトリウム１２５部）（Ｋ
ＯＨ／ＮａＯＨモル比＝１．５、触媒７２モル比＝０．
７５）を発熱に注意しながら１．５時間で滴下し、更に
１時間要して８５℃に昇温し、８５℃で５時間反応させ
た。Example 1 470 parts of phenol and 714 parts of 42% formalin (F/
263 parts of 48% potassium hydroxide and 125 parts of 48% sodium hydroxide) (K
OH/NaOH molar ratio = 1.5, catalyst 72 molar ratio = 0.
75) was added dropwise over 1.5 hours while being careful not to generate heat, the temperature was raised to 85°C over another 1 hour, and the mixture was reacted at 85°C for 5 hours.
反応終了後冷却し、市販のアミノシランＡ−１，１００
（Ｕ、Ｃ，Ｃ社製）を収量に対して０．３％加え、水溶
性フェノール樹脂液を得た。After the reaction is completed, cool and use commercially available aminosilane A-1,100.
(manufactured by U, C, C) was added at 0.3% based on the yield to obtain a water-soluble phenol resin liquid.
・得られた樹脂液の性状
不揮発分（％） ： ５５．２
粘 度 ＝９０センチポイズ（２５℃）Ｐ Ｈ：
１１．５
実施例２
触媒として４８％水酸化カリウム３５０部と４８％水酸
化ナトリウム１６７部に変更した以外は実施例１と同様
な操作で（Ｆ／Ｐモル比＝２．０． ＫＯＨ／ＮａＯＨ
モル比＝１．５．触媒７２モル比＝ １．０）水溶性フ
ェノール樹脂液を得た。・Properties of the obtained resin liquid Non-volatile content (%): 55.2 Viscosity = 90 centipoise (25°C) PH:
11.5 Example 2 The same procedure as in Example 1 was carried out except that 350 parts of 48% potassium hydroxide and 167 parts of 48% sodium hydroxide were used as catalysts (F/P molar ratio = 2.0. KOH/NaOH
Molar ratio=1.5. A water-soluble phenol resin liquid was obtained (catalyst 72 molar ratio = 1.0).
・得られた樹脂液の性状
不揮発分（％） ： ５４．３
粘 度 ニア５センチポイズ（２５℃）Ｐ Ｈ：
１２．３
実施例３
フェノール４７０部、４２％ホルマリン８９３部（Ｆ／
Ｐモル比＝２．５）及び触媒として４８％水酸化カリウ
ム３５０部と４８％水酸化ナトリウム１６７部（ＫＯＨ
／ＮａＯＨモル比＝１．５、触媒７２モル比＝１．０）
を用い実施例１と同様な操作で水溶性フェノール樹脂液
を得た。・Properties of the obtained resin liquid Non-volatile content (%): 54.3 Viscosity Near 5 centipoise (25°C) PH:
12.3 Example 3 470 parts of phenol, 893 parts of 42% formalin (F/
P molar ratio = 2.5) and 350 parts of 48% potassium hydroxide and 167 parts of 48% sodium hydroxide (KOH
/NaOH molar ratio = 1.5, catalyst 72 molar ratio = 1.0)
A water-soluble phenol resin liquid was obtained in the same manner as in Example 1.
・得られた樹脂液の性状
不揮発分（％） ： ５０．５
粘 度 ＝５０センチボイズ（２５℃）Ｐ Ｈ：
１２．４
実施例４
フェノール４７０部、４２％ホルマリン８９３部（Ｆ／
Ｐモル比＝２．５）及び触媒として４８％水酸化カリウ
ム４０９部と４８％水酸化ナトリウム１２５部（ＫＯＨ
／ＮａＯＨモル比＝ ２．３３、触媒７２モル比＝ １
．０）を用い実施例１と同様な操作で水溶性フェノール
樹脂液を得た。・Properties of the obtained resin liquid Non-volatile content (%): 50.5 Viscosity = 50 centivoise (25°C) PH:
12.4 Example 4 470 parts of phenol, 893 parts of 42% formalin (F/
P molar ratio = 2.5) and 409 parts of 48% potassium hydroxide and 125 parts of 48% sodium hydroxide (KOH
/NaOH molar ratio = 2.33, catalyst 72 molar ratio = 1
．． A water-soluble phenol resin liquid was obtained in the same manner as in Example 1 using 0).
・得られた樹脂液の性状
不揮発分（％） ： ５０．９
粘 度 ＝４５センチボイス（２５℃）Ｐ Ｈ：
１２．５
く比較例１〉 〈フェノール樹脂の調製に、触媒として
ＮａＯＨのみを用いた例〉
−’／ −
フェノール４７０部と４２％ホルマリン７１４部（Ｆ／
Ｐモル比＝ ２．０）を温度計、冷却器、および撹拌機
を備えたフラスコに仕込み、触媒として４８％水酸化ナ
トリウム３１２部（３，７４モル）を発熱に注意しなが
ら１．５時間で滴下し、更に１時間で８５℃に昇温し、
８５℃で５時間反応後、冷却し市販のアミノシランＡ
−１１００（Ｕ、Ｃ，Ｃ社製）を収量に対して０．３％
加え、水溶性フェノール樹脂液を得た。・Properties of the obtained resin liquid Non-volatile content (%): 50.9 Viscosity = 45 cmvoice (25°C) PH:
12.5 Comparative Example 1><Example in which only NaOH was used as a catalyst for the preparation of phenolic resin>-'/- 470 parts of phenol and 714 parts of 42% formalin (F/
P molar ratio = 2.0) was charged into a flask equipped with a thermometer, a condenser, and a stirrer, and 312 parts (3.74 mol) of 48% sodium hydroxide was added as a catalyst for 1.5 hours while being careful not to generate heat. The temperature was further increased to 85°C in 1 hour.
After reacting at 85°C for 5 hours, it was cooled and commercially available aminosilane A was added.
-1100 (manufactured by U, C, C) at 0.3% of the yield
In addition, a water-soluble phenol resin liquid was obtained.
・得られた樹脂液の性状
不揮発分（％） ： ５４．９
粘 度 ：２１０センチポイズ（２５℃）Ｐ Ｈ
：１１．８
〈比較例２〉 〈フェノール樹脂の調製に触媒としてＫ
ＯＩ（のみを用いた例〉
触媒を４８％水酸化カリウム４３９部（３，７６モル）
に変更した以外は比較例１と同様な操作で水溶性フェノ
ール樹脂液を得た。・Properties of the obtained resin liquid Non-volatile content (%): 54.9 Viscosity: 210 centipoise (25°C) PH
:11.8 <Comparative Example 2><K used as a catalyst in the preparation of phenolic resin
Example using OI (only) 439 parts (3,76 mol) of 48% potassium hydroxide catalyst
A water-soluble phenol resin liquid was obtained in the same manner as in Comparative Example 1 except that the following procedure was performed.
・得られた樹脂液の性状
不揮発分（％） ： ５４．４
粘 度 ＝１５０センチポイズ（２５℃）Ｐ
Ｈ：１１．９
実施例１〜４及び比較例１〜２で調製した樹脂の安定性
試験及び鋳型用としての性能評価を試験した。・Properties of the obtained resin liquid Non-volatile content (%): 54.4 Viscosity = 150 centipoise (25°C) P
H: 11.9 The resins prepared in Examples 1 to 4 and Comparative Examples 1 to 2 were tested for stability and performance evaluation for use in molds.
１）安定性試験
４０℃における水溶液フェノール樹脂液の３０日間放置
後の粘度の経時変化を測定した。結果を第１図に示す。1) Stability test The change in viscosity over time of an aqueous phenolic resin solution left at 40° C. for 30 days was measured. The results are shown in Figure 1.
２）強度性能評価
小型多腕式ミキサー（９０ｒｐｍ）にフリーマントル新
砂３，０００部を入れ、これにガンマ−ブチロラクトン
の６０％水溶液１８部を加え、３０秒間混練したのち、
実施例及び比較例で調製した各種樹脂液４５部を加え更
に３０秒間混練、直ちに、塩化ビニール製５０ｍ／ｍΦ
Ｘ５０ｍ／ｍＨの割型に手込め造型し、０．５゜１．０
．３．０．２４．０時間後に圧縮強さを測定し、常態強
度とした。可使強度は混練砂を混練後１０分間放置して
から手込め造型し、２４時間後に圧縮強さを測定したも
のである。測定結果を第１表に示す。2) Strength performance evaluation 3,000 parts of Freemantle new sand was placed in a small multi-arm mixer (90 rpm), 18 parts of a 60% aqueous solution of gamma-butyrolactone was added thereto, and the mixture was kneaded for 30 seconds.
Add 45 parts of the various resin liquids prepared in Examples and Comparative Examples, knead for another 30 seconds, and immediately add 50 m/mΦ made of vinyl chloride.
Hand molded into a split mold of x50m/mH, 0.5゜1.0
．． 3. Compressive strength was measured after 0.24.0 hours and taken as normal strength. The usable strength was measured by hand-molding the kneaded sand after kneading it for 10 minutes, and measuring the compressive strength 24 hours later. The measurement results are shown in Table 1.
第１表匍融膿汲び可使強度（ｋｇ／、ｄ〔注〕混線・放
置条件
砂温度 １５℃
放置温度 １５℃
湿度 ６７％ＲＨ
〔発明の効果〕
本発明は、２種類のアルカリ金属塩基性触媒を用いて調
製した水溶性フェノール樹脂と有機エステル系硬化剤と
から成る鋳造用鋳型造型用結合剤組成物を提供するもの
である。Table 1 Usable strength of molten pus pump (kg/, d [Note] Cross-wire and storage conditions Sand temperature 15°C Storage temperature 15°C Humidity 67% RH [Effects of the invention] The present invention provides two types of alkali metal bases. The present invention provides a binder composition for casting molds, which comprises a water-soluble phenolic resin prepared using a chemical catalyst and an organic ester curing agent.
本発明になる前記水溶性フェノール樹脂は、従来の樹脂
と比較して低活性、貯蔵安定性に優れ、かつ鋳型造型に
適用した場合も初期（０，５時間後）・最終強度（２４
時間後）において、さらに可使時間の延長、即ち作業性
の面において優れた特性を発現する。The water-soluble phenolic resin of the present invention has low activity and excellent storage stability compared to conventional resins, and when applied to mold making, initial strength (after 0.5 hours) and final strength (24
(after a certain period of time), it exhibits excellent properties in terms of further extension of pot life, that is, workability.
第１図は、各種の水溶性フェノール樹脂液の粘度変化（
４０″’ＣＸ３０日間）を示すものである。Figure 1 shows the viscosity changes (
40'''CX30 days).
Claims (1)
ら成る鋳物用自硬性結合剤組成物において、前記水溶性
フェノール樹脂が少なくとも２種のアルカリ金属塩基性
触媒を用いて調製される水溶性フェノール樹脂であるこ
とを特徴とする鋳物用自硬性結合剤組成物。 ２）２種のアルカリ金属塩基性触媒の一方が、水酸化カ
リウムであり、他方が水酸化ナトリウムであり、水酸化
カリウム／水酸化ナトリウムのモル比が１／１〜４／１
であることを特徴とする第１項記載の鋳物用自硬性結合
剤組成物。[Scope of Claims] 1) A self-hardening binder composition for foundries comprising a water-soluble phenolic resin and an organic ester curing agent, wherein the water-soluble phenolic resin is prepared using at least two types of alkali metal basic catalysts. 1. A self-hardening binder composition for castings, which is a water-soluble phenolic resin. 2) One of the two types of alkali metal basic catalysts is potassium hydroxide, the other is sodium hydroxide, and the molar ratio of potassium hydroxide/sodium hydroxide is 1/1 to 4/1.
2. The self-hardening binder composition for castings according to item 1, which is characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12030386A JPS62279048A (en) | 1986-05-27 | 1986-05-27 | Composition for self-curing binder for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12030386A JPS62279048A (en) | 1986-05-27 | 1986-05-27 | Composition for self-curing binder for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62279048A true JPS62279048A (en) | 1987-12-03 |
Family
ID=14782898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12030386A Pending JPS62279048A (en) | 1986-05-27 | 1986-05-27 | Composition for self-curing binder for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62279048A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6422446A (en) * | 1987-07-17 | 1989-01-25 | Hodogaya Ashiyurando Kk | Production of sand mold for casting |
| JPH01262043A (en) * | 1988-04-08 | 1989-10-18 | Acme Resin Corp | Method of improving tensile strength of reclaimed sand coupled by ester curing alkaline phenol resin |
| JPH01262042A (en) * | 1988-04-08 | 1989-10-18 | Acme Resin Corp | Manufacture of molded form of resin-bonded sand |
| JPH02280940A (en) * | 1989-04-18 | 1990-11-16 | Kao Corp | Organic foaming fluid self-hardening mold composition |
| JPH03216236A (en) * | 1990-01-22 | 1991-09-24 | Mitsubishi Heavy Ind Ltd | Non-coating molding method using alkaline phenol resin |
-
1986
- 1986-05-27 JP JP12030386A patent/JPS62279048A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6422446A (en) * | 1987-07-17 | 1989-01-25 | Hodogaya Ashiyurando Kk | Production of sand mold for casting |
| JPH01262043A (en) * | 1988-04-08 | 1989-10-18 | Acme Resin Corp | Method of improving tensile strength of reclaimed sand coupled by ester curing alkaline phenol resin |
| JPH01262042A (en) * | 1988-04-08 | 1989-10-18 | Acme Resin Corp | Manufacture of molded form of resin-bonded sand |
| JPH02280940A (en) * | 1989-04-18 | 1990-11-16 | Kao Corp | Organic foaming fluid self-hardening mold composition |
| JPH03216236A (en) * | 1990-01-22 | 1991-09-24 | Mitsubishi Heavy Ind Ltd | Non-coating molding method using alkaline phenol resin |
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