Patent GB-689640-A (GB)
Title: Improvements in or relating to textile fibre processing compositions and a method ofprocessing textile fibres therewith
IPC: D06M11/79
Filed: 1950-06-14
Abstract: For increasing the inter-fibre friction and tensile strength of cellulosic textile fibres, e.g. cotton fibres, there is applied at some stage in their processing before carding a composition comprising a stable mixture of an alkaline silica aquasol having a pH between 8 and 11, from 15 to 75 per cent by weight, based on the silica in the aquasol, of an organic hygroscopic agent and from 15 to 75 per cent by weight, based on the silica in the aquasol, of a water-soluble emulsifying agent which is capable of lubricating cellulosic fibres or a mixture of a water-soluble emulsifying agent and an oily lubricant, the composition being applied in an amount sufficient to deposit from 0.1 to 3 per cent by weight of silica, from 0.1 to 0.3 per cent by weight of the hygroscopic agent and from 0.1 to 0.3 per cent by weight of the emulsifying agent or mixture of emulsifying agent and oily lubricant on the fibres.  The composition is preferably applied in the pneumatic trunk line between the cleaners and the condenser feeding the picker.  The silica sol may be prepared by the methods described in Specifications 645,703 and 649,897, [both in Group III].  Specified hydroscopic agents are polyhydric alcohols such as glycerine, sorbitol, ethylene glycol and 2-methyl-2,4-pentanediol; polyhydric alcohols containing ether linkages such as propylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, tetraethylene glycol and other polyethylene glycols; amines such as monoethanolamine and triethanolamine; and acetamide.  Specified water-soluble emulsifying agents are the alkali metal salts of mineral, vegetable or animal oil sulphates and sulphonates, the alkali metal salts of fatty alcohol sulphates or sulphonates and sulphonated lard oil.  Specified mixtures of oily lubricants and emulsifying agents are those of mineral oils, vegetable oils, e.g. olive oil, or lard oil, with mahogany soaps, sulphonated lard oil, polyglycol esters of fatty acids containing 10-20 carbon atoms, triethanolamine oleate, turkey red oil, fatty alcohol alkali metal sulphates or sulphonates; paraffin waxes emulsified with alkanolamine oleates or with ammonium oleate and gelatine; and mixtures of mineral oils with vegetable or animal oils and mineral oil alkali metal sulphonates.  Examples are given.ALSO:A composition for application to textile fibres (see Group IV(c)) comprises a stable mixture of an alkaline silica aquasol having a pH between 8 and 11, from 15 to 75 per cent by weight, based on the silica in the aquasol, of an organic hygroscopic agent and from 15 to 75 per cent by weight, based on the silica in the aquasol, of a water-soluble emulsifying agent which is capable of lubricating cellulosic fibres or a mixture of a water-soluble emulsifying agent and an oily lubricant.  The silica sol may be prepared by the methods described in Specifications 645,703 and 649,897.  Specified hygroscopic agents are polyhydric alcohols such as glycerine, sorbitol, ethylene glycol, and 2-methyl-2, 4-pentanediol; polyhydric alcohols containing ether linkages such as propylene glycol, diethylene glycol, tetraethylene glycol and other polyethylene glycols, amines such as mono- and triethanolamine; and acetamide, Specified water-soluble emulsifying agents are the alkali metal salts of mineral, vegetable or animal oil sulphates and sulphonates, the alkali metal salts of fatty alcohol sulphates and sulphonates and sulphonated lard oil.  Specified mixtures of oily lubricants and emulsifying agents are those of mineral oils, vegetable oils, e.g. olive oil, or lard oil with mahogany soaps, sulphonated lard oil, polyglycol esters of fatty acids containing 10-20 carbon atoms, triethanolamine oleate, turkey red oil, fatty alcohol alkali metal sulphates and sulphonates; paraffin waxes emulsified with alkanolamine oleates or with ammonium oleate and gelatine; and mixtures of mineral oils with vegetable or animal oils and mineral oil alkali metal sulphonates.  Examples are given.