Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
  • D06M15/423—Amino-aldehyde resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L89/00—Compositions of proteins; Compositions of derivatives thereof
  • C08L89/005—Casein
• • 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
  • D01F4/00—Monocomponent artificial filaments or the like of proteins; Manufacture thereof

Definitions

• a"processf composed of casein or partly or casein and pafift of? cellulose; comprisesspinning a solutionfmore especially an aque'oussqlutiong; of. casein or ..of
• baths through which:the coagulated, iilament is passed-i1! :Qrfder to producefi i hedfibre may ciudezother baths.- additional to ,the baths- (a); and: Kb) mentioned above. for. example: deacidiflying and partially, hardening baths, as ingthe,
• F t i ibiwm t zfr s est' o t dl r. going propertiesfantl a higheriorder of st'rength" with rynes and; moisture *o ffthe fibre are ob' .e, jr safeea a nuo i thiea i t rs'mslfi least th a or baths containing iorma'ldehyd'orafter *the" fila' it is out, it being: convenient to itreat in this manner a large number o'f filaments simultane ou'sly spunfin the coagulating?
• a temperature above 28 C. may be employed in those baths or at least in the bath or one or more of the baths (1)) containing formaldehyde, as in the process forming the subject matter of the aforesaid U. S. patent applications No. 330,725, 348,992, both now abandoned and U. S. Patent No. 2,338,917, for example, if a temperature not above 25 C.
• a temperature above 25 C. preferably a temperature of 70-75 C.
• the fibre obtained will be much softer and larger after acid boiling than a urea-free fibre and from. this point of view, can be compared with a fibre treated with a chromium salt, but with the advantage, however, that the fibre retain a perfectly white appearance.
• casein filaments alreadycoagulated but not yet insolubilized by formaldehyde cannot be treated with a simple solution of urea, as a simple solution of urea dissolves casein and in consequence the filament would at once dissolve in the solution.
• a simple solution of urea dissolves casein and in consequence the filament would at once dissolve in the solution.
• a saline solution of urea preferably concentrated and astringent
• no dissolving of the filament occurs, but only a slight swelling of the filament, which can be adjusted at will by varyin the degree of concentration and/or the astringent capacity of the solution according to the amount of urea that has to be absorbed by the filament and to the degree of penetration of the urea that has to be obtained.
• Urea may in some cases be present in the formaldehyde-free acid salt coagulating bath, but in general, coagulation of the filament is hindered and there tends to be a large loss of urea in the first de-acidifying bath following the coagulating bath.
• An aqueous saline bath having the composition of the bath (1)) but containing in addition gms. of urea crystals per litre of the bath and more sodium chloride until the bath is saturated.
• the fibres are now out to the required length after which they are treated, preferably in an autoclave, in an aqueous bath (e) containing gms. of aluminium sulphate, 200 gms. of sodium chloride and 40 gms. of 100% formaldehyde per litre, for 5-6 hours.
• aqueous bath e
• aluminium sulphate 200 gms. of sodium chloride
• 40 gms. of 100% formaldehyde per litre for 5-6 hours.
• the insolubilized fibres are now washed and treated in an aqueous bath or baths (1) of soluble phosphates, for instance such a bath containing 4 gms. of monosodium phosphate per litre, after which the fibres are washed again and dried.
• the preferred temperature for the various baths are: 35 l0 C. for bath (a) 50-55 C. for bath (b):
• Example II The procedure in this example is the same as in Example I, except that the filaments are out after bath (0) instead of after bath ((1), the out fibres being gathered together in a vessel containing bath ((1), in which they are treated for 3-4 hours at 35-40 C., then treated in bath (e) at 70-75 C. for 5-7 hours, then washed, then treated in the bath or baths (1) and finally, washed again and dried.
• Example III The procedure in this example is the same again as in Example I, except that the filaments are out after the bath (b) instead of after bath (d), the cut filaments being gathered together in a vessel containing bath (0) in which they are treated for 2-3 hours at 35-40 C., and then, after having been squeezed out, in conformity with Example II, omitting bath (e).
• urea as employed herein includes all soluble salts containing urea such for example as thio-urea.
• the invention includes both the use of milkcasein and also the use of vegetable casein for example soya bean casein, either being used alone or the two in admixture with one another.
• aqueous urea bath is rendered saline by the addition of sodium chloride and aluminum sulphate in the proportions, per liter, of about grams of urea crystals, about grams initially of sodium chloride, and about200 grams of aluminum sulphate; the sodium chloride content bein then increased unti]. substantial saturation is reached.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Medicinal Chemistry (AREA)
• Organic Chemistry (AREA)
• Polymers & Plastics (AREA)
• Health & Medical Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Artificial Filaments (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=11202548

Family Applications (1)

Country Status (7)

Cited By (6)

Citations (4)

• 0
  • BE BE443631D patent/BE443631A/xx unknown
  • NL NL66502D patent/NL66502C/xx active
• 1941
  • 1941-07-04 DE DEF356D patent/DE909491C/de not_active Expired
• 1942
  • 1942-02-09 CH CH229823D patent/CH229823A/fr unknown
  • 1942-03-05 GB GB2888/42A patent/GB615305A/en not_active Expired
  • 1942-03-05 FR FR921563D patent/FR921563A/fr not_active Expired
• 1946
  • 1946-12-05 US US714130A patent/US2548357A/en not_active Expired - Lifetime

Patent Citations (4)

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