Patent GB-942806-A (GB)
Title: Organic titanate materials
Inventor: EMBLEM HAROLD GARTON
IPC: B22C1/20
Filed: 1960-04-29
Abstract: Compositions for use as moulds in investment casting processes and in the manufacture of refractory articles, comprise a condensation product of an aminoalkyl titanate ester and an oxirane compound of formula <FORM:0942806/C1/1> wherein R and R1 each represent hydrogen, a saturated alkyl group with 1 to 6 carbon atoms, a phenyl group or a benzyl group as the binder for particulate refractory material.  The refractory e.g. zircon flour, calcined alumina, when used to prepare a ceramic shell mould, is slurried with the condensation product and water with a mutual solvent such as isopropyl alcohol, coated on the pattern and a ceramic shell built up by repeated coatings which are allowed to set by the action of water.ALSO:Condensation products of an aminoalkyl titanate ester and an oxirane compound: <FORM:0942806/C2/1> wherein R and R1 which may be the same or different represent hydrogen, a saturated alkyl group with 1 to 6 carbon atoms, a phenyl group or a benzyl group are obtained by heating the components, preferably under reflux together. The amino alkyl groups of the titanate are derived from an amino alcohol R4NHR5 where R4 is a saturated monohydroxy alkyl containing 1 to 6 carbon atoms and R5 is hydrogen, or a saturated alkyl with 1 to 4 carbon atoms e.g. monoethanolamine and monoisopropanolamine and the titanate may be an orthotitanate ester Ti(OR2)x (OR3)4-x wherein R2 is an aminoalkyl group, R3 an unsubstituted alkyl and x is 1,2,3, or 4, or a polytitanate consisting of units TiO (OR2)y (OR3)2-y where y has value of from 0.75 to 2. The oxirane compounds may be ethylene, 1,2-propylene, 1,2-butylene, 2,3-butylene oxides, oxirane octylene oxides, or styrene oxides. Examples describe the condensation of monoethanol-amine orthotitanate, and di-n butyldi-monoisopropanolamine ortho titanate with propylene oxide, n-butyl(monoethanolamine) polytitanate with propylene oxide, isoprppyl monoethanolamine orthotitanate with butylene oxide, tri-isopropoxy titanate with ethylene oxide, and the reaction product of isopropyl orthotitanate with N-ethyl ethanolamine with propylene oxide to give products which are suitable as coating compositions for wax patterns, as parting agents for silicate adhesives and metal surfaces, as binders for particulate refactories in the manufacture of moulds, or in aqueous solution as emulsifying agents.ALSO:Condensation products of an aminoalkyl titanate ester and an oxicane compound <FORM:0942806/C3/1> wherein R and R1, which may be the same or different represent hydrogen, a saturated alkyl group with 1 to 6 carbon atoms, a phenyl group or a benzyl group, are obtained by heating the components together, preferably under reflux. The aminoalkyl groups of the titanate are derived from an aminoalcohol R4NHR5, where R4 is a saturated monohydroxyalkyl containing 1 to 6 carbon atoms and R5 is hydrogen, or a saturated alkyl with 1 to 4 carbon atoms e.g. monoethanolamine and monoisopropanolamine and the titanate may be an orthotitanate ester, Ti(OR2)x(OR3)4-x wherein R2 is an aminoalkyl group, R3 an unsubstituted alkyl and X is 1,2,3 or 4 or a polytitanate consisting of units TiO(OR2)y (OR3)2-y where y has the value of from 0.75 to 2. The oxicane compounds may be ethylene, 1,2-propylene, 1,2-butylene, 2,3-butylene oxides, oxicane octylene oxides, or styrene oxides. Examples describe the condensation of monoethanolamine orthotitanate and di-n butyl-di-monoisoropanolamine orthotitanate with propylene oxide, n-butyl (monoethanolamine) polytitanate with propylene oxide, isopropyl monoethanolamine orthotitanate with butylene oxide, tri-isopropoxy titanate with ethylene oxide and the reaction product of isopropyl orthotitanate with N-ethanolamine with propylene oxide to give products which are suitable as coating compositions for wax patterns, as parting agents for silicate adhesives and metal surfaces, as binders for particulate refractories in the manufacture of moulds or in aqueous solutions as emulsifying agents.ALSO:An adhesive composition, with a low adherence to metal, comprises aqueous sodium silicate and a condensation product of an aminoalkyl titanate ester and an oxicane compound of formula <FORM:0942806/C3/1> wherein R and R1 each represent hydrogen, a saturated alkyl group with 1 to 6 carbon atoms, a phenyl group, or a benzyl group (Division C2).ALSO:Condensation products of an aminoalkyl titanate ester and an oxirane compound of formula <FORM:0942806/B1-B2/1> wherein R and R1 each represent hydrogen, a saturated alkyl (1-CC), a phenyl group, or a benzyl group e.g. monoethanolamine tri-isopropoxy titanate and ethylene oxide, are used as emulsifying agents.  In an example the above compound is dissolved in water and molten beeswax stirred in to form a fine stable emulsion.