Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
  • C08B3/00—Preparation of cellulose esters of organic acids
  • C08B3/22—Post-esterification treatments, including purification
• • 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
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
  • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
  • D06M11/48—Oxides or hydroxides of chromium, molybdenum or tungsten; Chromates; Dichromates; Molybdates; Tungstates
• • 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
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
  • D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
• • 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
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
  • D06M11/64—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with nitrogen oxides; with oxyacids of nitrogen or their salts
• • 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
  • D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
  • D06M13/192—Polycarboxylic acids; Anhydrides, halides or salts thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06Q—DECORATING TEXTILES
  • D06Q1/00—Decorating textiles
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06Q—DECORATING TEXTILES
  • D06Q1/00—Decorating textiles
  • D06Q1/02—Producing patterns by locally destroying or modifying the fibres of a web by chemical actions, e.g. making translucent

Definitions

• Alkali-soluble cellulose acetate textile is produced by treatment of said textile with an aqueous solution containing chromic acid, or a dichromate such as sodium dichromate, and an acid such as nitric, sulfuric or oxalic acid.
• oxalic acid may be used instead of the inorganic acid.
• the new alkali-soluble cellulose acetate textile material of this invention may be in any of the usual textile forms such as fiber, yarn or fabric, and it may be combined with other textile materials by fiber blending, yarn spinning or knitting or weaving in a textile fabric.
• the alkali-soluble component of such textile products may be easily and quickly removed by treating the textile material containing the alkali-soluble component with a dilute alkaline solution such as for example a 0.01% to 3% sodium hydroxide solution.
• This dissolving solution also may be in the form of boiling solutions of mild alkalis or soap solutions commonly employed for washing textile materials in textile mills.
• the solubility of the treated cellulose acetate material will be substantialy complete, i.e. 98% to 100% soluble.
• a lower solubility such as 90% to 95%, might be used, and where desired it can be obtained by use of less concentrated treating chemicals, i.e. the dichromate and acid, or by employing a shorter period of time, or a lower processing temperature.
• the general ranges for the treating conditions necessary to provide a solubility of 90% to 100% are as follows:
• the cellulose acetate material that is treated and rendered alkali-soluble in accordance with the present invention may be the regular cellulose diacetate or the more recent cellulose triacetate.
• the treated cellulose acetate textile material has substantially the same textile properties as it had before treatment and may be used as a textile material and processed in the same way as the original cellulose acetate.
• the loss of breaking strength, of the cellulose acetate depends on ice the degree of solubility desired. If the solvent is to be .5 (or more) sodium hydroxide, the treatment conditions and chemical concentrations can be such that the breaking strength is reduced about 22-25%, and the weight loss is minor. More importantly, we have found that the yield point of the treated cellulose acetate is only about 4% lower than that of the untreated cellulose acetate. This does not necessitate any change in the usual textile manufacturing processes in which the cellulose acetate material is used. To make the cellulose acetate soluble in mild alkalis, treatment must be more drastic and strength loss is about 50%.
• Determination of solubility in alkalis Adjust temperature of solution to 100 F. Immerse the cellulose acetate specimen, bring to a boil. Boil 5 minutes. Pour through a stainless steel screen, 150 x mesh. Rinse residue until alkali-free.
• a high degree of alkali-solubility can be obtained even though the time and temperature are changed considerably. If a lower treatment temperature is used, the time must be increased, as must also the concentration of reagents.
• a temporary core yarn is employed, around which the filling yarn is coiled or spiraled, the core yarn acting as a carrying medium for the spiraled or coiled yarn. It is necessary for this core yarn to be easily removed and preferably by the use of liquids or solutions commonly employed in towel or fabric finishing.
• One of the important commercial advantages of the cellulose acetate yarn of the present invention is that it is relatively inexpensive and is a readily available commodity in fiber, yarn or fabric form, and its processing in accordance with the present invention to render it alkali-soluble, is a relatively inexpensive process
• the alkali-soluble textile material of the present invention is not limited to the above mentioned example of special yarn, or its use, for example in lace manufacture wherein the alkali-soluble portion of the lace fabric would be removed by scouring or the like to produce the desired lace design.
• a process of producing alkali-soluble cellulose acetate textile material which comprises treating nonalkalisolu-ble cellulose acetate textile materialwith an aqueous solution containing about 0.23% to about 3.1% by weight of chromic acid and about 1% to 18% by weight of a strong acid selected from the group consisting of nitric and sulfuric under temperature conditions sufiicient to obtain a textile material that is at least 90% soluble in about 0.01% to about 3% aqueous alkali solution without appreciably aifecting the tensile strength of the material.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Biochemistry (AREA)
• Materials Engineering (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

Country Status (8)

Cited By (1)

Citations (2)

• 1964
  • 1964-10-08 US US402642A patent/US3425788A/en not_active Expired - Lifetime
• 1965
  • 1965-08-13 GB GB34872/65A patent/GB1049009A/en not_active Expired
  • 1965-08-24 AT AT778065A patent/AT260412B/de active
  • 1965-08-30 CH CH1210865A patent/CH457350A/de unknown
  • 1965-09-14 FR FR31417A patent/FR1453528A/fr not_active Expired
  • 1965-10-07 DK DK514465AA patent/DK112467B/da unknown
  • 1965-10-07 NL NL6512988A patent/NL6512988A/xx unknown
  • 1965-10-07 BE BE670634A patent/BE670634A/xx unknown

Patent Citations (2)

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