Patent GB-1504963-A (GB)
Title: Textile treatment
IPC: D06M15/277
Filed: 1975-02-25
Abstract: 1504963 Textile treatment MINNESOTA MINING & MFG CO 25 Feb 1975 [26 Feb 1974] 7829/75 Heading D1P [Also in Divisions C2 and C3] A composition for the fluorochemical treatment of textiles such as carpets, upholstery, to impart water and oil repellancy and stain resistance thereto comprises having dispersed or dissolved therein at least 1% by weight of a detergent-compatible fluorochemical compound which is of the formula: (R f Q) e  (XCO) m  A(COOM) p  .... (1) or has the repeating structure wherein: R f  represents a fluorinated aliphatic radical having at least 3 carbon atoms, Q represents a divalent linking group, M represents a cation selected from NH 4 <SP>+</SP>, Na<SP>+</SP>, K<SP>+</SP>, Li<SP>+</SP>, Morpholinium and H<SP>+</SP> or a protonated alkyl amine having from 1 to 6 carbon atoms in the alkyl group, A represents a polyvalent organic radical, X represents a nitrogen or oxygen atom or NR in which R represents a hydrogen atom or an alkyl group of from 1 to 14 carbon atoms, R' represents an alkyl group of from 1 to 6 carbon atoms or an alkoxy alkyl group, e, p, and,m are 1 or 2, Z is zero or 1, a is an integer, b is from zero to 10 times a. The composition is impregnated to the textile using preferably aerosol-spray technique with a liquid such as organic solvents or organic solvent/water mixture. Organic solvents employed include ethanol, THF, methyl ethyl ketone &c. The composition may contain an anionic and/or a nonionic detergent such as alcohol sulphates or sodium lauryl sulphates &c. The weight ratio of the detergent to organic fluorochemical compound is in the range 1:1 to 2:1 by weight. The compounds of the composition may be prepared by reacting a precursor fluorochemical amine or alcohol with a suitable anhydride. The amines and alcohols are listed in the specification. The acid group is neutralized with a slight excess of a base to make it water-soluble or water-dispersible. The non- fluorinated organic radical has at least 6, preferably carbon, atoms in a skeletal backbone structure which links the fluorinated radical R F  to the carboxylic acid group. The skeletal structure can include divalent oxygen and/or trivalent nitrogen hetero atoms. The R F  radicals are saturated and can be straight chain, branched chain, and, if sufficiently large, cyclic, or combinations thereof. R F  radical has 3 to 20 carbon atoms and contains 40 to 78 weight per cent carbon-bonded fluorine and is substantially completely or fully fluorinated. In the general formula Q may include one or more groups such as alkylene, sulphonamide alkylene &c. A has a valency of m+p in formula (i) and may be aromatic, araliphatic, cycloaliphatic or heteroaromatic or the residue of a polybasic acid or an anhydride &c. The fluorochemical alcohols may be reacted with the anhydride by direct melt esterification or in the presence of aprotic solvents, preferably with esterification promoting catalysts such as perfluoromethane sulphonic acid or a tertiary amine. The composition may contain an anti-redeposition agent such as the ammonium salt of the hydrolyzed copolymer of styrene and maleic anhydride. For carpet cleaning the cleaning/treating solution can be dispensed from a dispenser fitted to a conventional scrubbing device. The propellants used in aerosol spray are listed in the specification. In some cases the material is treated with soil retardant shampoo before being treated with the composition of the present invention.