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
  • D01F1/00—General methods for the manufacture of artificial filaments or the like
  • D01F1/02—Addition of substances to the spinning solution or to the melt
  • D01F1/10—Other agents for modifying properties
• • 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
  • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
  • D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
  • D01F2/30—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate by the dry spinning process

Definitions

• This invention relates to textile materials comprising fibres of cellulose acetates having improved resistance to delustring.
• this invention consists in textile articles comprising threads'or fibres of cellulose esters and containing between 0.1% and 5% by weight of at least one acid of the general formula R(COOH),,, in which R is a hydrocarbyl radical of 4 to 6 carbon atoms, and n is 2 or 3.
• threads and fibres of cellulose acetates which are unusually resistant to delustring are made by extruding in the form of fibres a solution of a cellulose acetate containing 0.1-5%, of the weight of the cellulose acetate, of an acid of formula R(COOH),,, in which R is a hydrocarbyl radical of 4-6 carbon atoms and n is an integer from 2 to 3, and setting the fibres so formed by evaporation of the solvent (dry spinning).
• cellulose acetates is used to denote both socalled secondary cellulose acetates having a combined acetic acid content between 54.5% and 55%, and the product commonly called cellulose triacetate, having a combined acetic acid content between 59% and 61.5%.
• orthophthalic acid isophthalic acid
• terephthalic acid terephthalic acid
• trimesic acid may be introduced in the form of their anhydrides, the moisture present in the spinning solution generally being sufficient to convert them to the acids.
• the extent to which the delustring threshold temperature is raised varies with the acetate employedand the spinning process.
• the increase in the temperature at which delustring begins may in some cases be as much as 30 C.; this is clearly important, especially in the case of articles which start to become delustred at about 105 C. and which may, by means of the present invention, be treated without delustring at temperatures of about C., and possibly higher, so enabling these articles to be subjected to the thermal treatments necessary for producing good noncreasing properties, as well as to be dyed under optimum conditions.
• EXAMPLE 1 A solution of 21.5% by weight of cellulose triacetate in a mixture of methylene chloride and methanol (90/10 by weight) is dry spun in a known way to give threads which begin to delustre at 100 C. When 0.2% of orthophthalic acid (calculated on the weight of triacetate) is added to the same solution, which is then spun under the same conditions as before, there is obtained a thread which remains shiny when treated with hot water under pressure up to and even above 130 C., a rise in the delustring threshold temperature of at least 30 C.
• the following table shows the serirnetric results ob- 3-2 36 kg? tained on the control thread and on the thread containing 32 90 1.06 the orthophthalic acid.
• the following table which relates to the action of light, shows comparative tests carried out with and without introduction of 0.2% of orthophthalic acid by exposure to light in an apparatus known under the trade mark Xenotest, for 158 hours.
• EXAMPLE 14 An acetone solution of a secondary cellulose acetate containing 0.1% of trimesic acid calculated on the weight of the cellulose acetate, is dry-spun by known means. A thread is obtained which becomes very slightly opalescent under the action of water at -90 C., while a control of the same acetate thread becomes distinctly opalescent at 82 C.
• EXAMPLE 15 The same cellulose triacetate solution as in Example 1, but containing 0.2% of isophthalic acid on the weight of the cellulose triacetate, is dry-spun by known means. A thread is obtained which becomes slightly opalescent under the action of water at 105 C., while a control thread starts to become opalescent at C.
• EXAMPLE 16 The same cellulose triacetate solution as in Example 1, containing 0.1% of adipic acid, is dry-spun by known means. A thread is obtained which is very slightly opalescent from -110 C., while a control thread starts to become opalescent at 100 C. These last examples 6 show that isophthalic and adipic acids, while they are References Cited most effective with secondary cellulose acetates, have UNITED STATES PATENTS some effect also With triacetates. 2 040 971 5 9 Auden 106 131 We clalym 2,065,766 12/1936 Taylor 106-481 1.
• Textxle artlcles compnslng fibres of cellulose tn- 5 2 39 024 11 1945 Bruson 106 181 acetate which fibres contain 0.1 to 3.2% by Weight of orthophthalic acid. JULIUS FROME, Primary Examiner.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Textile Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Artificial Filaments (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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Citations (3)

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• 1963
  • 1963-12-12 FR FR956971A patent/FR1386465A/fr not_active Expired
• 1964
  • 1964-11-10 DE DES94116A patent/DE1260681B/de active Pending
  • 1964-12-08 SE SE14826/64A patent/SE305921B/xx unknown
  • 1964-12-09 GB GB50145/64A patent/GB1037480A/en not_active Expired
  • 1964-12-10 AT AT1048164A patent/AT257822B/de active
  • 1964-12-11 DK DK609964AA patent/DK112811B/da unknown
  • 1964-12-11 CH CH1601764A patent/CH433587A/fr unknown
  • 1964-12-11 NL NL6414447A patent/NL6414447A/xx unknown
  • 1964-12-11 LU LU47564A patent/LU47564A1/xx unknown
  • 1964-12-11 FI FI2625/64A patent/FI41985B/fi active
  • 1964-12-11 BE BE657036A patent/BE657036A/xx unknown
  • 1964-12-12 ES ES0307029A patent/ES307029A1/es not_active Expired
• 1966
  • 1966-06-20 US US558563A patent/US3369916A/en not_active Expired - Lifetime

Patent Citations (3)

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