Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
  • D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
  • D01F2/08—Composition of the spinning solution or the bath
  • D01F2/10—Addition to the spinning solution or spinning bath of substances which exert their effect equally well in either
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
  • C08L1/08—Cellulose derivatives
  • C08L1/22—Cellulose xanthate
  • C08L1/24—Viscose

Definitions

• the subject of the present invention is a process for the production of fibres, threads or films from regenerated cell-ulose, which are characterised by low swelling and high strength.
• modifiers are added to the viscose or to the spinning bath in order to retard the xanthogenate decomposition and to reduce the gel swelling value, which frequently improves the properties of the spun threads.
• the other spinning conditions also have had to be adapted to these altered conditions, for example it may be necessary to use higher concentrations oi zinc sulphate and lower concentrations of sulphuric acid in the precipitating bath or to use a separate second bath in which the necessary stretching of the resulting threads may be carried out.
• Compound which are capable of producing the desired effects include numerous mono and poly-amines and their alkoxylated products and polyglycol ethers of various compositions or mixtures of the two classes of substances.
• a further object of the invention consists in "ice agents such as those described in German patent specification 880,485 or in German Auslege suits 1,062,014.
• polyether sulphonium compounds used in accordance with the invention have the particular advantage providing novel additives for the viscose in the viscose I spinning process. Further objects of the invention will be clear from the following description and examples.
• polyether sulphonium compounds which are soluble at least to the extent of 0.1% in 5% sodium hydroxide solution and preferably have a molecular weight between 300 and 20,000. It is preferred to use those polyether sulphonium compounds in which the cation contains at least one ether oxygen atom or one sulphonium group for every 4 carbon atoms.
• the polyether sulphonium compounds are prepared by ternating polyether thioethers, the latter being obtainable by various methods.
• the thioet-hers used as starting material may be prepared by oxal'kyl-ating mono-, dior polymercaptans or m0-no-, dior polythioether alcohols, by condensing dior polyhalogen alkyl-ethers with alkali metal sulphides or mono-, diand polymercaptans, by copolymerisation of alkylene sulphides with alkylene oxides or by mixed condensation of polyalkylene glycols with ,8- or v-hydroxyal-kyl sulphides. It is particularly advantageous to use the polyether thioethers which are described in French patent specification 1,201,171.
• the ternating of these polyether thioethers may be carried out with a large variety of alkylating agents, for example methyl iodide, allyl bromide, benzyl chloride, dimethyl sulphate, diethyl sulphate, triethyl phosphate, methylmcthane sulphonate, met-hyl-p-toluene-sulphonate or other alkylating that they are mixed homogeneously more easily with the viscose than the additive hitherto proposed, so that they are more effective.
• alkylating agents for example methyl iodide, allyl bromide, benzyl chloride, dimethyl sulphate, diethyl sulphate, triethyl phosphate, methylmcthane sulphonate, met-hyl-p-toluene-sulphonate or other alkylating that they are mixed homogeneously more easily with the viscose than
• the compounds that may be used in accordance with the invention may very conveniently be applied by means of the dosing process used in spin dyeing, because when they have been injected in the form of their aqueous or alkaline solution into the main stream of the viscose and have passed through the mixing apparatus customarily provided in such plants, they are already uniformly distributed as required.
• the substances incorporated in the viscose in accordance with the present invention can not only retard coagulation and thereby influence the formation of the threads in the viscose and in the spinning bath, but owing to their pronounced cationic character and their surface activity they can produce other effects which are advantageous for the spinning process. Examples of these include: improved filtering of the viscose, improved drawing of the threads, reduced tendency to block spinnerets and form incrustations, clarification of the spinning bath and the like. These features illustrate further advantages of these substances compared with-the non-ionic polyalkylene oxide compounds.
• so-cal'led spinning oils to the viscose. These are surf-ace active products of various types. The use of these spinning oils becomes superfluous in the method according to the invention.
• polyether sulphon-ium compounds may be added to the viscose in quantities which vary depending on the effect desired on the fibres and with the other conditions, the quantities varying between 0.1 and 4%, preferably 0.1 and 0.6% by weight.
• the dosing process may be carried out with the usual apparatus without any additional equipment.
• the production of fibres, threads and films of improved mechanical properties by the process according to the invention is not limited to particular compositions of viscose and of the spinning bath.
• the precipitating baths preferably contain at least 3% by weight of zinc sulphate.
• the stretching of the spun threads which is necessary in order to obtain good textile properties, may be carried out by known methods either in the spinning bath or in air or in special stretching baths.
• the fibres and threads obtained with the use of the above mentioned viscose additives are distinguished from those prepared without the use of these additives by i u e having aflatteniadifieross-section, e. g., kidney shaped, reduced swelling and increased dry tensile strength and wet tensile strength without reduced elongation at break-
• the invention is further disclosed in the following examples which are illustrative but not limitative thereof.
• Example 1 A viscose containing 7.5% cellulose and 5.0% total alkali; and to which 2.25 g. of the compound described below has been added per kg. of viscose was spun at a degree of maturity corresponding to a saltpoint 8 from. a spinneret having 48 apertures of 90,11. diameter into an acid precipitating bath to form athread oh 180 total denier.
• the bath contained-125 g./l. sulphuric acid, 250 g. /l.
• The. polyether sulphonium compound used in this example was prepared as follows:
• 600- g. of polyethylene glycol having a molecular 'weight of 600,200 g. of thiodiglycol and 8 g..pl1OS- phoric acid. were heated in a current'of CO at 185 C. until the. condensate had a hydroxyl number of 42.
• Example 2 2 g. of the compound described below were added per kg. of viscose to a viscose with 7.2% cellulose and 4.8% alkali. The process was then continued as described in Example 1 except that a precipitating bath composed of 100 g./l. sulphuric acid, 230 g./l. sodium sulphate and 40 g./l. zinc sulphate at a temperature of.
• a precipitating bath composed of 100 g./l. sulphuric acid, 230 g./l. sodium sulphate and 40 g./l. zinc sulphate at a temperature of.
• the polyether polysulphonium. compound was pre- 1 pared. as in Example 1 except that instead ofusing polyethylene glycol with molecular weight 600, an equivalent. quantity of oxyethylated tripropylene glycol with molec,-.
• the polyether polysulphonium compound used was prepared as in Example 1 except that 1118 'polyether thio' ether had a hydroxyl number of 14 corresponding to a molecular weight of 8000.
• Viscose spinning solution whichcontains 01-40% by weight. of a polyether sulphoniu'm' compound containing one member ofthe groupjconsistingofa .sul-
• ifonium group for. every four OaIlbOrr atoms in the polymer chain, an ether group. for every four carbon atoms in the polymer chain, and a sulfoniurn group plus ether oxygen for every-four carbon atoms in the polymer chain, said compound being soluble at least to the extent.
• Viscose spinning solution according to claim '1 which contains'a polyether sulphonium compound havin its cation at least one sulfonium group for every four carbon atoms.
• saidpolyether sulionium' compound being soluble at least to an' extent of 0.1% in a 5.weight percent aqeuous sodium hydroxide solution.

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Citations (4)

• 0
  • NL NL284978D patent/NL284978A/xx unknown
  • BE BE624261D patent/BE624261A/xx unknown
• 1961
  • 1961-11-02 DE DEF35264A patent/DE1222202B/de active Pending
• 1962
  • 1962-10-22 CH CH1242462A patent/CH429013A/de unknown
  • 1962-10-24 US US232891A patent/US3234036A/en not_active Expired - Lifetime

Patent Citations (4)

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