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
  • 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
  • D01F2/08—Composition of the spinning solution or the bath
  • D01F2/12—Addition of delustering agents to the spinning solution
  • D01F2/14—Addition of pigments

Definitions

• This invention relates generally to the manufacture of pigmented viscose rayon articles such as filaments, threads, fibers, and the like and more particularly to the manufacture of solution-colored and/or delustered viscose rayon articles.
• a delustered yarn it has been proposed that a relatively large amount, for example 1.0% to 5.0%, based on the weight of the cellulose in the viscose, be incorporated into the viscose spinning solution.
• a relatively large amount for example 1.0% to 5.0%, based on the weight of the cellulose in the viscose, be incorporated into the viscose spinning solution.
• a further object of this invention is to provide a viscose spinning solution for the manufacture of solutioncolored rayon wherein settling out of the pigments is substantially eliminated.
• Another object of the present invention is to provide a viscose spinning solution for the manufacture of solution-colored rayon wherein precipitation of the dispersing agent used therein does not occur.
• An additional object of this invention is to provide a viscose spinning solution for the manufacture of delustered and/ or solution-colored rayon wherein the pigments retain their finely dispersed state.
• a viscose spinning solution having dispersed therein an organic coloring pigment and/or a substantially white inorganic delustering pigment, a primary aliphatic amine containing 12 to 18 carbon atoms, and sodium N-coco 'beta-aminopropionate or disodium N-tallow beta-iminodipropionate.
• propionates "ice are known in the trade as Deriphats and are N-substituted amino acid derivatives (beta-alanines). They are derived from the condensation of fatty primary amines and acrylic monomers.
• Coco denotes a mixture of fatty acids obtained from coconut oil
• tallow indicates a mixture of fatty acids obtained from tallow fat.
• These mixed fatty acids have straight carbon radicals ranging from about 8 to 24 carbon atoms with the individual amines in a distribution corresponding to the distribution of the fatty acids of the particular fat or oil.
• the substantially white inorganic pigments that are contemplated by this invention are those commonly known as delustrants. Examples of these are titanium dioxide, tin oxide, barium sulfate, lead sulfate, and zinc oxide.
• the preferred compound is titanium dioxide. If dichroism is to be prevented in a lustrous solution-colored yarn, then it is only necessary that about 0.01-0.10%, based on the weight of the cellulose in the viscose (hereinafter referred as CIV) be dispersed in the viscose solution. However, if a delustered yarn is desired, then about 1.0 to 5.0% CIV should be used, and if a delustered and solution-colored yarn is desired, then normally about 0.1 to 1.0% CIV will be used. It should be understood that this invention is not restricted to any precise range since it is obvious that the proportions of the delustrant may vary within wide limits, depending on the pigment and the type of coloring material used.
• the coloring materials contemplated by this invention are conventional organic coloring pigments. Examples of these are Microsol Yellow, Imperse Red, Stabaloid Black, Monolite Yellow. Monolite Red, Aquablack X, and Monastral Green.
• the amount of the coloring pigment will vary depending upon the desired color. The selection of the pigments and their amounts are easily determined by means known to those skilled in the art.
• the aliphatic amines required for successful operation of this invention are those that contain 12 to 18 carbon atoms, as for example, lauryl amine and oleyl amine. It is only necessary that very small amounts of the amine be incorporated into the viscose spinning solution. For instance, if 0.01 to 0.1% (CIV) titanium dioxide is used, normally 0.0005 to 0.005% (CIV) will be sufficient. However, if 1.0 to 5.0% (CIV) of titanium dioxide is to be used, then normally 0.05 to 0.25% (CIV) will be sufiicient to aid in the prevention of settling out of the pigments and precipitation of any of the salts present therein. It should be understood that larger or smaller amounts may be used without departing from this invention.
• the second organic compound contemplated by this invention for use in conjunction with the above pigments is sodium N-coco beta-aminopropionate or disodium N- tallow beta-iminodipropionate. It is only necessary that very small amounts of these compounds be used. For instance, if 0.01 to 0.1% (CIV) titanium dioxide is used, normally 0.0006 to 0.006% (CIV) will be suflicient. However, if 1.0 to 5.0% (CIV) titanium dioxide is to be used, then normally 0.06 to 30% (CIV) will be sulficient to aid in the prevention of settling out of the pigments and precipitation of any of the salts present therein. It should be understood that larger or smaller amounts may be used without appreciably affecting the results.
• the dispersion of these pigments and organic compounds in the viscose solution may be accomplished in any conventional manner.
• a stable slurry of the inorganic pigment and two organic compounds is prepared by uniformly dispersing the same in a liquid, for example, water.
• the pigment slurry may be prepared by grinding the inorganic pigment and two organic compounds in the presence of water in a pebble mill, a ball mill, a colloid mill such as a Charlotte mill, or a homo mixer. The resulting dispersion does not exhibit any settling out for several days.
• a delustered viscose rayon yarn is desired, an appropriate aliquot may be withdrawn from this slurry and incorporated into the viscose spinning solution. Normally the same will be injected into a flowing stream of viscose and thereafter the viscose and pigment dispersion are passed through a conventional mixing stage wherein the same are thoroughly mixed throughout the viscose spinning solution. Thereafter the pigmented viscose solution is extruded into a conventional coagulating bath to form filaments therefrom.
• An organic coloring pigment may be separately incorporated into the viscose solution before or after the above pigment dispersion. It may also be incorporated into the pigment dispersion and thereafter injected or otherwise incorporated into the viscose spinning solution.
• the amount of organic pigments used will, of course depend upon the color and shade desired. In addition, the amount of inorganic pigment used will depend upon whether only dichroism is to be prevented or that a delustered and solution-colored yarn is to be obtained.
• Example I An aqueous dispersion of 20% titanium dioxide, 1.0% primary lauryl amine, and 1.25% disodium N-tallow beta-iminodipropionate was prepared by mixing the same in a homo mixer. A predetermined portion of the dispersion was withdrawn and was added to a viscose solution prepared in the usual manner. The formulation was 1.0% (CIV) titanium dioxide, 0.05% (CIV) primary lauryl amine, and 0.06% (CIV) disodium N-tallow beta-iminodipropionate. The delustered viscose was extruded through a spinneret into an acid coagulating bath. The finished filaments were closely wound on a viewing card and exhibited a dull luster.
• the pigment dispersion did not settle on standing, and the titanium dioxide was thoroughly dispersed in the resulting yarn. The spinnability of this viscose was normal, and the quality was normal.
• Example II An aqueous dispersion of titanium dioxide was prepared as in Example I. A predetermined portion of this dispersion was withdrawn and was added to a coloring pigment suspension. After thorough mixing, a predetermined amount of the resulting dispersion was added to a viscose solution prepared in the usual manner. The formulation was 0.7% (CIV) Monolite Yellow, 0.725%. (CIV) Monolite Red, 0.35% (CIV) Aquablack X, 0.45% (CIV) titanium dioxide, 0.0225 (CIV) primary lauryl amine, and 0.027% (CIV) disodium N-tallow beta-iminodipr'pionate, The solntion-colored viscose was extruded through a spinner'et into an acid coagulating bath. The finished filaments so produced were closely wound on a viewing card. When the filaments were viewed at different angles, there was no detectably different surface color perceptions and the color was autumn brown.
• the pigment dispersion did not settle on standing and there was no precipitate formed.
• the yarn was uniformly colored and the pigments were thoroughly dispersed throughout the yarn. The spinnability of the viscose and the quality of the yarn were normal.
• Example III An aqueous dispersion of 20% titanium dioxide, 1.0% primary lauryl amine, and 1.25% disodium N-tallow beta-iminodipropionate was prepared by mixing the same in a homo mixer. The dispersion was allowed to stand for seven days, and there was no settling of the titanium dioxide which remained thoroughly dispersed therein.
• Example IV An aqueous dispersion was prepared as in Example III except sodium N-coco beta-arninopropionate was substituted for the disodium compound. This dispersion was allowed to stand for seven days and the result was the same as in Example III. Also there was no settling or precipitation when a portion of this dispersion was added to standard organic coloring suspensions.
• Example V An aqueous dispersion was prepared in the same manner as in Example III, except primary oleyl amine was substituted for the lauryl amine. This dispersion did not settle after seven days nor did it exhibit any precipitation when mixed with standard organic coloring suspensions.
• delustering pigment dispersions and/ or solution-coloring dispersions may be prepared, which dispersions do not settle on long standing, nor is any precipitate formed.
• a viscose spinning solution according to claim 1 wherein said inorganic pigment is titanium dioxide.
• a viscose spinning solution according to claim 1 wherein said compound is disodium N-tallow beta-iminodipropionate.
• a viscose spinning solution according to claim 1 wherein said compound is sodium N-coco beta-aminopropionate.
• a viscose spinning solution for the manufacture of delustered rayon filaments having dispersed therein 1.0 to 5.0% (CIV) titanium dioxide, 0.05 to 0.25% (CIV) of a primary aliphatic amine containing 12 to 18 carbon atoms, and 0.06 to 0.3% (CIV) of a compound selected from the group consisting of disodium N-tallow betaiminodipropionate and sodium N-coco beta-aminopropionate.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Artificial Filaments (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Coloring (AREA)

Priority Applications (5)

Applications Claiming Priority (1)

Publications (1)

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Cited By (2)

Citations (4)

Family Cites Families (2)

• 1960
  • 1960-05-31 US US32593A patent/US3033697A/en not_active Expired - Lifetime
• 1961
  • 1961-05-25 BE BE604202A patent/BE604202A/nl unknown
  • 1961-05-26 GB GB19146/61A patent/GB926707A/en not_active Expired
  • 1961-05-30 ES ES0267793A patent/ES267793A1/es not_active Expired
  • 1961-05-31 DE DEA37569A patent/DE1208847B/de active Pending

Patent Citations (4)

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