SILICATES ORGANIQUES D'AMMONIUM QUATERNAIRE

摘要

1331605 Moulding moulds PHILADELPHIA QUARTZ CO 24 Aug 1970 [24 Aug 1969] 40578/70 Heading B5A [Also in Divisions B2 C2 and C3] Binder solutions for investment casting or shell moulding dip slurries consist of organic alkylalkanol quaternary ammonium silicates with above a substantially 15% SiO 2 which are alkali metal-free aqueous solutions characterized by a miscibility of above 80% when mixed with methanol, dissolved in a common water-miscible organic solvent containing below substantially 10% water, wherein the alkylalkanol radical comprises an alkyl group having 1-4 carbon atoms and an ethanol or polyethoxy group.