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
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
  • D06M13/12—Aldehydes; Ketones
  • D06M13/123—Polyaldehydes; Polyketones
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0025—Crystal modifications; Special X-ray patterns
  • C09B67/0026—Crystal modifications; Special X-ray patterns of phthalocyanine pigments
• • 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

Definitions

• Fabrics that are woven, knit, or otherwise manufactured from cellulosic threads of regenerated cellulose are characterized by a pronounced shrinking upon repeated launderings. Moreover, these materials possess wet strengths that are appreciably lower than. the dry strengths. To overcome these undesirable characteristics, many methods have been proposed of treating either the thread or the fabric made therefrom.
• dialdehyde which is employed in the practice of this invention is first dissolved in an aqueous solvent to which is added 'a weakly ionizable organic acid, such as oxalic acid, to serve as a catalyst.
• a weakly ionizable organic acid such as oxalic acid
• Example 1 Five-hundred-yard skeins were hand reeled from an undried cake of washed but undried 150/ viscose rayon thread. Undried yarn was used for two reasons: (1) undried regenerated cellulose is still in the gel state and is more reactive than after drying, and (2) this would be a logical point of application for incorporation in the viscose process for the production of cakes.
• a treating solution containing approximately 8% ahydroxyad'ipaldehyde and 0.6% oxalic acid was prepared by mixing 147 g. of a aqueous solution of a-hydroxyadipaldehyde with 300 ml. dioxane and diluting this to .a total volume .of 1000 ml. with water containing 6 g. oxalic acid as a catalyst.
• the dioxane prevented the precipitation of a white gummy material when diluting with water.
• the moist skeins were soaked for 5 minutes in this treating solution at 50-60 C., centrifuged for 5 minutes, and dried for 1 hour at 50-55 C.
• the dried, treated skeins were then baked for the times and at the temperatures shown below, after which they were washed in a solution of 0.25% soap and 0.1% NazCOa at 70 C., rinsed until free from soap and alkali, dipped in a 1.0% emulsion of finish, again centrifuged, and finally dried 1 hour at 50-55 C.
• the skeins were transferred to spools and tested for dry and wet strength and elongation.
• Example 3 l A series of skeins were treated in a manner similar q a to that of Example 2 except that a baking treatment of 4 min. at 110 C. was used. Results were as follows: I
• Example 6 A series of skeins were treated as described in Example Treating Solution Properties 1 with an 8% solution of a-hydroxyadipaldehyde.
• the organic acid catalysts used wereoxalic acid, adi ic acid, 11 D w t W and succinic acid Samples were baked 4 minutes at x2. 0 e ry 'et a Sample Aldehyde Acid Str so. Elong. Elong. 110 c,
• Example 7 of a glyoxal solution which for convenience sake are designated A, B, and C, respectively.
• A, B, and C were baked for each of the glyoxal solutions.
• a cake of 150/ denier viscose rayon thread that had been thoroughly purified but not dried was used as a source of supply, from which short lengths of thread were withdrawn, passed through a treating solution, collected on a metal bobbin, and dried at 50 C.
• Example 5 specified in Example 4 of U. S. Patent No. 2,436,076,
• a series of skeins were treated with a-hydroxyadipaldehyde in a manner similar to that of Example 1. For concentrations of 6% and 8% dialdehyde, skeins were treated with oxalic acid catalyst concentrations of 0.3, 0.6, and 1.0%. tions were used4 minutes at 110 C. and 3 minutes at 120 C.
• Example 10 swatch was then processed as follows:
• the viscose rayon is treated with about an 8% solution a-hydroxyadipaldehyde.
• This is not intended to limit the scope of this invention to this particular compound, however, for it is contemplated to treat regenerated cellulose with other dialdehydes having four-carbon-atom chains between the terminal carbon atoms.
• the mode of applying the dialdehyde to the material can be widely varied. It is particularly desirable to treat the filaments While they are still in the gel state, that is, before they have been dried once. Therefore, the process has particular utility in systems for the continuous manufacture of regenerated cellulose threads, e. g., in a system of the character described in application Serial No. 122,560 filed Oct. 20, 1949, assigned to the same assignee as the present application. In that system the dialdehyde solution can be used with optimum results in the last treating tube and prior to drying. However, this invention also finds applicability to the treatment of fabrics woven or knit from regenerated cellulose.
• a process of improving the resistance to shrinkage, wet and dry strength and wet and dry elongation of viscose rayon which comprises treating the viscose rayon with an aqueous solution containing 4-1()% of a-hydroxyadipaldehyde and 03-12% of weakly ionizable, organic acid catalyst, drying the thus treated viscose rayon at a temperature lower than the boiling point of water, and baking the dried viscose rayon at a temperature above the boiling point of water.
• the method of improving the resistance to shrinkage, wet and dry strength and wet and dry elongation of viscose rayon which comprises treating the viscose rayon with an aqueous solution containing about 8% oc-hYClIOXY- adipaldehyde and 0.6% oxalic acid, drying at about 50 C., and baking at 1l0-120 C. for 3-4 minutes.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Artificial Filaments (AREA)

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

Family

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Family Applications (1)

Country Status (7)

Families Citing this family (3)

Citations (4)

• 0
  • BE BE509748D patent/BE509748A/xx unknown
  • NL NL77001D patent/NL77001C/xx active
• 1951
  • 1951-07-24 US US238399A patent/US2728628A/en not_active Expired - Lifetime
• 1952
  • 1952-04-04 GB GB8724/52A patent/GB721380A/en not_active Expired
  • 1952-04-04 DE DEA15484A patent/DE939924C/de not_active Expired
  • 1952-04-17 FR FR1058002D patent/FR1058002A/fr not_active Expired
  • 1952-04-23 ES ES0203136A patent/ES203136A1/es not_active Expired

Patent Citations (4)

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