Patent GB-948133-A (GB)
Title: Organic silicate materials
Inventor: EMBLEM HAROLD GARTON
IPC: C08G77/02
Filed: 1959-11-27
Abstract: A condensation product of an aminoalkyl-silicate and an oxirane compound of the formula <FORM:0948133/C1/1> wherein R and R1 each represent hydrogen, an aliphatic group of 1 to 6 C atoms, or a phenyl, alkylphenyl or benzyl group (see Division C3), is used as a binder for ceramic materials in making refractory bricks and crucibles.  In examples, crucibles obtained by moulding mixtures of sillimanite and the product of Example 1 (c) (25, 26) or the product of Example 5 (29) were allowed to dry at room temperature and then fired at 1300 DEG  C.ALSO:A condensation product is made by reacting an aminoalkylsilicate with an oxirane compound of the formula <FORM:0948133/C3/1> wherein R and R1 each represent hydrogen, a saturated or unsaturated aliphatic group of 1 to 6 C atoms, a phenyl, alkyl-phenyl (1 to 6 C atoms in the alkyl radical) or a benzyl group, with or without substituents which are not reactive with an amino group of the silicate, to effect condensation of the oxirane group of the oxirane compound with the amino group of the silicate oxirane compounds specified are ethylene, 1,2-propylene, styrene, 1,2-butylene, 2,3-butylene and octylene oxides, glycidol, allylglycidyl ether and 1,2-epoxy-3-phenoxy-propane. The silicates used can be ortho- and/or poly-silicates in which the aminoalkoxy groups are derived from an aminoalcohol of the formula R4NH,R5, wherein R4 is a hydroxy-alkyl group containing 1 to 6 C atoms and R5 is H or an alkyl or mono-hydroxyalkyl group of 1 to 6 C atoms; the silicates may also contain alkoxy groups. The reaction is preferably effected at or near the boiling point of the reaction mixture and under anhydrous conditions.  In examples various oxirane compounds are reacted with aminoalkylorthosilicates (4,9 - 11,14-16,18 - 22 and 24), aminoalkylpolysilicates (1 - 3 and 5 - 8) or mixtures of the ortho-and polysilicates (12,13, 17 and 23). Uses: the products can be used as emulsifying agents in the preparation of textile yarn lubricants and polishes (Examples 27,28, and 30-35) and as binders for ceramic materials in making moulds in investment casting processes or refractory bricks and crucibles (Examples 25, 26 and 29).  The aminoalkylsilicates can be made (1) from alkyl silicates by interchange of some or all of the alkyl groups by aminoalkyl groups, or (2) by interchange of aminoalkyl groups of an aminoalkylsilicate by alkyl groups to yield a silicate of the type Si (OR2)x (OR3(4-x where R2 is an aminoalkyl group, R3 is an alkyl group and x is 1,2,3, or 4. Thus Si(OCH2CH2 NH2) (OC9H19)3 can be made by refluxing 2-amino-ethyl orthosilicate and nonyl alcohol and distilling off the displaced ethanolamine. In Example 20 monoethanolamine ortho-silicate was reacted with tridecanol to give Si (OC2H4NH2)2 (C13H27O)2. Specification 948,134 is referred to.ALSO:A condensation product of an aminoalkylsilicate and an oxirane compound of the formula <FORM:0948133/C3/1> wherein R and R1 each represent hydrogen, a saturated or unsaturated aliphatic group of 1 to 6 C atoms, a phenyl, alkyl-phenyl or benzyl group (see Division C3) is used as an emulsifying agent in the preparation of textile lubricants and polishes.  In examples, aqueous emulsions of liquid paraffin were made using (27) the product of Example 2, (30) the product of Example 10, and (31) the product of Example 4; (32) heavy white oil was emulsified with the product of Example 20 and water; (33) a polish was made by adding a mixture of heavy white oil, white spirit and the product of Example 20 to a suspension of silica in water with or without 2-amino-2-methyl-propan-1-ol; (34) a polish was made by adding heavy white spirit and the product of Example 20 to a suspension of silica in water containing the product of Example 19; and (35) a car polish was made by adding a molten mixture of carnauba wax, microcrystalline wax containing 2% of butyl rubber, white spirit or butyl phthalate and the product of Example 20, to a suspension of silica in water at 90 DEG  C. and emulsifying the mixture with or without the addition of oleic acid.