Verfahren zur Herstellung von Polyalkylenoxysilikaten

Polyoxyalkylene silicates of general formula [R-O-(CH2CHR1-O)m- 1 -(CH2CH2O)n]4- r -Si(R2)r wherein R is an alkyl group of 1 to 28 carbon atoms or an aryl group of 6 to 14 carbon atoms which may be substituted by one to three alkyl groups containing 1 to 18 carbon atoms, R1 is a methyl or ethyl group, each R2 represents an alkoxy group of 1 to 27 carbon atoms, or an aryloxy group of 6 to 14 carbon atoms, either of which may be substituted by halogen, an alkyl radical of 1 to 27 carbon atoms or a polyalkyloneoxy chain of 5 to 35 units, r is 0-3, and m and n are each 1 to 150 (see Division C3) may be used as lubricants and hydraulic fluids.ALSO:The invention comprises polyoxyalkylene silicates of general formula [R-O-(CH2CHR1-O)m- 1 -(CH2CH2O)n]4- r -Si(R2)r wherein R is an alkyl group of 1 to 28 carbon atoms, or an aryl group of 6 to 14 carbon atoms which may be substituted by one to three alkyl groups containing 1 to 18 carbon atoms, R1 is a methyl or ethyl group, each R2 represents an alkoxy group of 1 to 27 carbon atoms, or an aryloxy group of 6 to 14 carbon atoms, either of which may be substituted by a halogen atom, an alkyl radical of 1 to 27 carbon atoms or a polyalkyloneoxy chain of 5 to 35 units, r is 0-3, and m and n are each 1 to 150. Many R, R1 and R2 groups are specified. These compounds are prepared by the ester-exchange of an alkyl- or aryl-polyalkyleneoxyalkanol and a tetra-substituted silicate at 170-250 DEG C.; a list of suitable tetra-substituted silicate-starting materials is given. Typical examples describe the preparation of (II) [C9H19.C6H4. O(CH2CH2O)6]4Si and (III) C6H5O(CH2CH2O)120. Si-(OC6H5)3 in (XIV) the product of (III) is further transesterified with other polyethyleneoxymonoethers to yield products containing several different polyalkyleneoxy groups. Uses.-In lubricating and functional liquid formulations, catalysts, drugs, hydraulics, refrigeration, cosmetics, detergents, cleaning products, paints, plastics, greases, textile processing, modifying surface properties of leather, wood and paper, enamels, coatings, biocidal formulations, defoamers, corrosion inhibitors, and refractory binders.