Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
  • D06P1/651—Compounds without nitrogen
  • D06P1/65106—Oxygen-containing compounds
  • D06P1/65118—Compounds containing hydroxyl groups
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
  • Y10S8/09—Polyolefin

Definitions

• the invention relates to a method for the dyeing with disperse dyes of shaped articles of polypropylene 1n the presence of an aromatic compound as carrier.
• shaped articles of polypropylene may be dyed in such fashion that they have a high fastness to washing and rubbing by carrying out a process of the above-mentioned broadly known type in such a way that, as a carrier, use is made of an alkyl phenol, the alkyl group of which contains at least 6 carbon atoms.
• the method according to the present invention can be used for dyeing the most widely varying shaped articles of polypropylene, such as for instance, films or articles obtained by the injection-molding process.
• the invention is of particular importance for dyeing textile products and textile starting materials made of polypropylene.
• the polypropylene may contain other substances, such as pigments and stabilizing compounds.
• the articles formed also may consist of mixtures of said polypropylene polymers or of said polypropylene polymers with other polymers.
• the disperse dyes used in the process according to the present invention are per se known compounds which are practically insoluble in water. They are used in industry on a large scale, e.g., for dyeing textile material of cellulose acetate and polyethylene terephthalate.
• the polypropylene material to be dyed is preferably steeped in a heated aqueous dispersionof the given dye.
• This dispersion will preferably always contain a dispersing agent, such as an ethoxylated alkyl phenol, a sulphated fatty alcohol, or a sulphonated mineral oil.
• Polypropylene textile materials may also be steeped in a concenlice trated aqueous suspension of the dye and heated for some time at a temperature of, say, 140 C.
• eEnoxylated-alkyl phenols used as dispersing agents do not at all show an elfect on the dyeing of polypropylene to the extent shown by the alkyl phenols used according to the present invention.
• the process according to the present invention may be carried out in any of the known ways usin disperse dyes, care being taken, however, that the method is carried out in the presence of an alkyl phenol, the alkyl group of which contains at least 6 carbon atoms. 7
• the alkyl phenol employed according to the present invention is preferably used in such manner that it is added to the dye liquor, as is usual when employing carriers -together with the disperse dyes. But it is also possible for the. polypropylene textile products first to be treated with the alkyl phenol and then to be dyed. The latter method, however, otters no advantages over vthe method where the alkyl phenol is added directly to atoms.
• This alkyl group may be in ortho, meta, or para The position relative to the hydroxyl group or groups. carbon atoms in the alkyl group may form a straight or a branched chain.
• alkyl phenols may also have one or more additional alkyl substituents attached to the aromatic ring, such as methyl, ethyl, and higher alkyl groups. It is also possible to make use of a mixture of alkyl phenols the alkyl groups of which differ substantially in carbon atom content.
• the p-alkyl phenols the alkyl groups of which contain at least 6 and up to 15 carbon atoms, and preferably from 8 to 12 carbon atoms, yield the most favorable results because they strongly further the penetration by the disperse dyes, even when employed in relatively small quantities.
• an amount of 0.5 part by weight to parts by weight of the dye liquor is generally amply sufiicient.
• various disperse dyes or mixtures thereof make it possible to dye shaped articles of polypropylene in the most Widely varying colors.
• the present invention comprises, in addition to the ene dyed by this method.
• Example I (a) A sample of 100 parts by weightof tubular hosiery of a 75 -denier polypropylene yarnconsisting of 24 filaments is'introduced into a dyeliquor present in an autoclave, after which the temperature of the dye liquor is raisedto 130 C.
• the dye liquor consists of 8,000'parts by weight of water, 9 parts by weight of a red disperse dyestuff (Rouge estrophilelumiere RBL Extra, made by Messrs. Francolor, Colour Index No. 11040), 80 parts by weight of the sodium salt of sulphated stearyl alcohol as dispersing agent,-and 40 parts by weight of para-nonyl phenol.
• the para-nonyl phenol is brought into a finely divided state by first dissolving it in a'small amount of sodium hydroxide, adding the resulting solution to the dye liquor, and then neutralizing this dye liquor with acetic acid.
• Example 11 In the manner described in Example In above, an identi it cal sample isdyed, use being made now of a yellow dis:
• Examplelll I In the manner described in Example Ia above, another identical sample is dyed, use being made now of a blue disperse dyestuff (Palanilblau RD'made by "Messrs Badische Anilin -und Sodafabrik, Colour Index No; 61500), octyl phenol being used in an amount equal to and instead of nonyl-phenol as carrier.
• a blue disperse dyestuff Palanilblau RD'made by "Messrs Badische Anilin -und Sodafabrik, Colour Index No; 61500
• octyl phenol being used in an amount equal to and instead of nonyl-phenol as carrier.
• Example IV I In the manner described in Example Iafabove, another '7 of C. consisting of 10,000 parts by weight of water, I
• a method for imparting a fast color to a shaped textile material made of polypropylene comprising sub-: jecting said shaped textile material to treatment in a hot. aqueous dyebath containing at least one-disperse dye and in an aromatic compound as carrier, said carrier being an alkyl phenol the alkyl group of which contains from 6 to 15 carbon atoms, and removing dyed shaped textile material of polypropylene from the hot dyehath, whereby the desired color is imparted throughout the shaped textile material of polypropylene such that the color is not removed after immersion of the shaped textile material for 15 minutes in a boiling 5% aqueous solution of sodium stearate.
• alkyl phenol is a para-alkyl phenol the alkyl group of which contains from 8 to 12 carbon atoms.

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• Textile Engineering (AREA)
• Coloring (AREA)

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ID=19753019

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Cited By (1)

Citations (5)

• 0
  • BE BE615820D patent/BE615820A/xx unknown
  • NL NL264447D patent/NL264447A/xx unknown
  • NL NL110013D patent/NL110013C/xx active
• 1962
  • 1962-04-13 FR FR894381A patent/FR1319765A/fr not_active Expired
  • 1962-04-23 US US189256A patent/US3157457A/en not_active Expired - Lifetime
  • 1962-04-30 GB GB16363/62A patent/GB941294A/en not_active Expired

Patent Citations (5)

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