Patent GB-900800-A (GB)
Title: Production of fluid compositions containing silica
Inventor: SHEPHERD ERIC JAMES
IPC: C09K23/00
Filed: 1959-06-23
Abstract: A pourable colloidal dispersion of SiO2 in an organic liquid is prepared by evaporating water from an emulsion of a SiO2 aquasol and the organic liquid (the organic liquid being immiscible with the aquasol).  The liquid containing 1,5-30% of non-ionic emulsifying agent has a smaller volume of aquasol, containing at least 15% SiO2 size 10-100 mm , added thereto, and water is evaporated at below 85 DEG C., e.g. 40-75 DEG C. Emulsifying agents may be condensation products of ethylene oxide with a carboxylic acid, an alcohol (cetyl or lauryl), a phenol (butyl or octyl phenol), an amine, or a mercaptan, monoor di-esters of polyethylene glycol of mol. wt. 150-900 and an aliphatic acid having from 10-20 carbon atoms, e.g. lauric, stearic, oelic, or palmitic, sorbitan sesquioleate, lanolin, or esters of propylene glycol or glycerol.  Anionic oilsoluble emulsifying agents may also be used, e.g. soaps, or petroleum sulphonates.  Organic liquids may be solvents, e.g. white spirit, naphtha, toluene, xylene, butyl or amyl acetate, methyl isobutyl ketone, or tri- or per-chlorethylene; paint or varnish oils, e.g. linseed, stand, tung, or soyabean; or lubricating oils. Particularly useful are textile oils, e.g. oleine, castor, olive, sperm, mineral (spindle), or blends thereof, preferably self-scouring oils which contain already a nonionic emulsifying agent, with, or without, a small proportion of an anionic agent. The textile oils may be used in the treatment of textiles by application to unspun fibres of wool or wool blends, e.g. with "Terylene", "Acrilan", nylon, or viscose rayon, before spinning.  (The words "Terylene" and "Acrilan" are registered Trade Marks.)  The dispersion may contain 25% up to 40% SiO2 or as little as 1%, and dilution may be effected by adding textile oil, or emulsifying with water.  Specification 840,372 is referred to.ALSO:Textiles are improved, e.g. tensile strength is increased and slippage is reduced, by treatment with a pourable colloidal dispersion of SiO2 in an organic liquid.  The dispersion may contain 25% up to 40% SiO2 or as little as 1%, and dilution may be effected by adding textile oil, or emulsifying with water. Organic liquids may be solvents, e.g. white spirit, naphtha, toluene, xylene, butyl or amyl acetate, methyl isobutyl ketone, or tri- or per-chlorethylene; paint or varnish oils, e.g. linseed, stand, tung, or soyabean; or lubricating oils. Particularly useful are textile oils, e.g. oleine, castor, olive, sperm, mineral (spindle), or blends thereof, preferably self-scouring oils, which contain already a non-ionic emulsifying agent, with, or without, a small proportion of an anionic agent. Emulsifying agents may be condensation products of ethylene oxide with a carboxylic acid, an alcohol (cetyl or lauryl), a phenol (butyl or octyl phenol), an amine, or a mercaptan, mono- or di-esters of polyethylene glycol of mol. wt. 150-900, and an aliphatic acid having from 10-20 carbon atoms, e.g. lauric, stearic, oleic, or palmitic, sorbitan sesquioleate, lanolin, or esters of propylene glycol or glycerol, Anionic agents may be soaps or petroleum sulphonates.  The dispersons may be applied to unspun fibres of wool or wool blends, e.g. with "Terylene", "Acrilan" (Registered Trade Marks), nylon, or viscose rayon, before spinning. Specification 840,372 is referred to.