GB853766A - Improved moulding compositions - Google Patents

Improved moulding compositions

Info

Publication number
GB853766A
GB853766A GB577957A GB577957A GB853766A GB 853766 A GB853766 A GB 853766A GB 577957 A GB577957 A GB 577957A GB 577957 A GB577957 A GB 577957A GB 853766 A GB853766 A GB 853766A
Authority
GB
United Kingdom
Prior art keywords
sand
hexamine
added
novolak
solution
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
Application number
GB577957A
Inventor
Cyril Alexander Jones
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.)
Distillers Co Yeast Ltd
Distillers Co Ltd
Original Assignee
Distillers Co Yeast Ltd
Distillers 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 Distillers Co Yeast Ltd, Distillers Co Ltd filed Critical Distillers Co Yeast Ltd
Priority to GB577957A priority Critical patent/GB853766A/en
Publication of GB853766A publication Critical patent/GB853766A/en
Expired 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

Landscapes

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

Abstract

Free-flowing shell moulding sand consists of discrete sand particles coated with a thermosetting resin and a mineral lubricating oil. Resins may be phenolic resins, which may be, either resols obtained by condensing phenol and a molar excess of aldehyde, or novolaks obtained with a molar deficiency of aldehyde under acidic conditions and settable by addition of aldehyde, e.g. as hexamine, 2-5% resin is used. Oils may have S.A.E. 10-100 and may be used in amount 0.01-0.1%. A solution of a resol may be added to sand and the solvent evaporated, or, alternatively, hot sand may be mixed with a novolak, and hexamine added in solution, or dry sand may be mixed with a solution of novolak and hexamine. The oil may be added at any stage, preferably to hexamine, which is added to a mixture of sand and novolak. Specification 763,812 is referred to.
GB577957A 1957-02-20 1957-02-20 Improved moulding compositions Expired GB853766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB577957A GB853766A (en) 1957-02-20 1957-02-20 Improved moulding compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB577957A GB853766A (en) 1957-02-20 1957-02-20 Improved moulding compositions

Publications (1)

Publication Number Publication Date
GB853766A true GB853766A (en) 1960-11-09

Family

ID=9802466

Family Applications (1)

Application Number Title Priority Date Filing Date
GB577957A Expired GB853766A (en) 1957-02-20 1957-02-20 Improved moulding compositions

Country Status (1)

Country Link
GB (1) GB853766A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755240A (en) * 1969-12-12 1973-08-28 Texaco Ag Thermosetting pulverulent binder
US4163741A (en) 1977-04-15 1979-08-07 Lyass Abram M Sand mold compositions containing as catalyst, methyl alcohol solutions of benzenesulphonic acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755240A (en) * 1969-12-12 1973-08-28 Texaco Ag Thermosetting pulverulent binder
US4163741A (en) 1977-04-15 1979-08-07 Lyass Abram M Sand mold compositions containing as catalyst, methyl alcohol solutions of benzenesulphonic acid

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