JPS57206549A - Binder composition for molding sand - Google Patents

Binder composition for molding sand

Info

Publication number
JPS57206549A
JPS57206549A JP9242481A JP9242481A JPS57206549A JP S57206549 A JPS57206549 A JP S57206549A JP 9242481 A JP9242481 A JP 9242481A JP 9242481 A JP9242481 A JP 9242481A JP S57206549 A JPS57206549 A JP S57206549A
Authority
JP
Japan
Prior art keywords
molding sand
sand
binder
compds
soln
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
Application number
JP9242481A
Other languages
Japanese (ja)
Other versions
JPS6364261B2 (en
Inventor
Takeshi Tobinaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Petrochemical Co Ltd
Original Assignee
Mitsubishi Petrochemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Petrochemical Co Ltd filed Critical Mitsubishi Petrochemical Co Ltd
Priority to JP9242481A priority Critical patent/JPS57206549A/en
Priority to GB8129764A priority patent/GB2088886B/en
Priority to US06/308,236 priority patent/US4352914A/en
Priority to DE19813139484 priority patent/DE3139484A1/en
Priority to FR8118796A priority patent/FR2491363B1/en
Priority to CA000387393A priority patent/CA1176785A/en
Publication of JPS57206549A publication Critical patent/JPS57206549A/en
Publication of JPS6364261B2 publication Critical patent/JPS6364261B2/ja
Granted legal-status Critical Current

Links

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
    • B22C1/22—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 resins or rosins
    • B22C1/2233—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 resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B22C1/2273—Polyurethanes; Polyisocyanates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

PURPOSE:To improve collapsing property after a binder for molding sand is used for casting of sand molds by using org. polyisocyanate compds. and specific polyol compds, as said binder. CONSTITUTION:Alcohol such as methanol, ethanol or the like is added to a compd. having methylol groups obtd. by the reaction of bisphenols and formaldehyde such as an aq. formalin soln. and after the pH is controlled to 4-8, these are allowed to react at 60-80 deg.C. The soln. of the resultant polyol comd. and an arom. polyisocyanate compd. such as diphenyl methane diisocyanate as binders are added at 0.3-5pts.wt. basing on 100pts.wt. molding sand, and these are mixed. The mixture is molded to a sand mold. Such sand mold has good collapsing property after casting, and improve the workability in the removal of castings and the reutilization rate of the molding sand.
JP9242481A 1980-10-06 1981-06-16 Binder composition for molding sand Granted JPS57206549A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP9242481A JPS57206549A (en) 1981-06-16 1981-06-16 Binder composition for molding sand
GB8129764A GB2088886B (en) 1980-10-06 1981-10-02 Binder composition for foundry molds or cores
US06/308,236 US4352914A (en) 1980-10-06 1981-10-02 Binder composition for foundry sand molds and cores
DE19813139484 DE3139484A1 (en) 1980-10-06 1981-10-03 BINDING COMPOSITION FOR FOUNDRY SAND AND CORE SAND
FR8118796A FR2491363B1 (en) 1980-10-06 1981-10-06 BINDER COMPOSITION FOR MOLDS AND FOUNDRY CORES IN SAND
CA000387393A CA1176785A (en) 1980-10-06 1981-10-06 Binder composition for foundry sand molds and cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9242481A JPS57206549A (en) 1981-06-16 1981-06-16 Binder composition for molding sand

Publications (2)

Publication Number Publication Date
JPS57206549A true JPS57206549A (en) 1982-12-17
JPS6364261B2 JPS6364261B2 (en) 1988-12-12

Family

ID=14054040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9242481A Granted JPS57206549A (en) 1980-10-06 1981-06-16 Binder composition for molding sand

Country Status (1)

Country Link
JP (1) JPS57206549A (en)

Also Published As

Publication number Publication date
JPS6364261B2 (en) 1988-12-12

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