GB857132A - Improvements in or relating to foundry sand compositions - Google Patents

Improvements in or relating to foundry sand compositions

Info

Publication number
GB857132A
GB857132A GB801/59A GB80159A GB857132A GB 857132 A GB857132 A GB 857132A GB 801/59 A GB801/59 A GB 801/59A GB 80159 A GB80159 A GB 80159A GB 857132 A GB857132 A GB 857132A
Authority
GB
United Kingdom
Prior art keywords
weight
mol
silicate
silicon
composition
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
GB801/59A
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.)
Midland Silicones Ltd
Original Assignee
Midland Silicones 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 Midland Silicones Ltd filed Critical Midland Silicones Ltd
Publication of GB857132A publication Critical patent/GB857132A/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
    • B22C1/167—Mixtures of inorganic and organic binding agents

Landscapes

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

Abstract

A foundry moulding sand composition comprises up to 10% by weight of an aqueous dispersion of an alkali metal, e.g. sodium, potassium, lithium, silicate having a silicate concentration of at least about 10% by weight and a silica to alkali metal oxide ratio of at least 0,5-1, and an organosilicon additive which is compatible with the aqueous silicate solution and which has an average of 0,9-1,7 monovalent aliphatic hydrocarbon radicals per silicon atom in the polymer molecule and wherein there is contained at least 3% by weight of organic substituents consisting of alkoxy radicals having from 1-6 carbon atoms, said organosilcon additive being present in the composition in an amount between 1-15% by weight of the aqueous silicate dispersion in the composition. Three examples of additives are (a) 45% by weight xylene solution of a siloxane co-polymer composed of 75% mol of monomethylsiloxane, 24% mol of dimethylsiloxane and 1% mol of trimethylsiloxane which co-polymer contained about 6% by weight of silicon isopropoxy groups (b) a monopropyl-siloxane containing 15-25% by weight of silicon-bonded ethoxyl groups and (c) an 85% xylene solution of a mixture of 85% by weight of a methoxylated direct process residue and 15% by weight of a methylsiloxane resin. The cores and moulds may be hardened by the CO2 process, in air, or by storing. Specification 714,461 is referred to.
GB801/59A 1958-01-16 1959-01-08 Improvements in or relating to foundry sand compositions Expired GB857132A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US857132XA 1958-01-16 1958-01-16

Publications (1)

Publication Number Publication Date
GB857132A true GB857132A (en) 1960-12-29

Family

ID=22193465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB801/59A Expired GB857132A (en) 1958-01-16 1959-01-08 Improvements in or relating to foundry sand compositions

Country Status (1)

Country Link
GB (1) GB857132A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1095719A2 (en) * 1999-10-26 2001-05-02 VAW Aluminium AG Binder, core sand and process for their production
AU2005203130B2 (en) * 1999-10-29 2008-08-14 Minelco Gmbh Binding agent system based on water glass

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1095719A2 (en) * 1999-10-26 2001-05-02 VAW Aluminium AG Binder, core sand and process for their production
WO2001030517A2 (en) * 1999-10-26 2001-05-03 Vaw Aluminium Ag Binding agent system, core sand mixture and a method for producing the same
EP1095719A3 (en) * 1999-10-26 2001-06-20 VAW Aluminium AG Binder, core sand and process for their production
WO2001030517A3 (en) * 1999-10-26 2001-12-27 Vaw Ver Aluminium Werke Ag Binding agent system, core sand mixture and a method for producing the same
US7022178B1 (en) 1999-10-26 2006-04-04 Hydro Aluminium Deutschland Gmbh Binding agent, core sand mixture and a method for producing the same
CZ297087B6 (en) * 1999-10-26 2006-09-13 Vaw Aluminium Ag Water glass-based binding agent system, core sand mixture and process for producing such core sand mixture
DE29925010U1 (en) 1999-10-26 2008-09-04 Mincelco Gmbh Water glass bonded core molding material
DE29925011U1 (en) 1999-10-26 2008-10-02 Minelco Gmbh Foundry core binder system
AU2005203130B2 (en) * 1999-10-29 2008-08-14 Minelco Gmbh Binding agent system based on water glass

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