US2265463A - Process to increase the viscosity of aqueous gelatin solutions - Google Patents

Process to increase the viscosity of aqueous gelatin solutions Download PDF

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Publication number
US2265463A
US2265463A US339588A US33958840A US2265463A US 2265463 A US2265463 A US 2265463A US 339588 A US339588 A US 339588A US 33958840 A US33958840 A US 33958840A US 2265463 A US2265463 A US 2265463A
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United States
Prior art keywords
acid
viscosity
gelatin
acids
amino
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Expired - Lifetime
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US339588A
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English (en)
Inventor
Wendt Bruno
Eggert John
Trautmann Gunter
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GAF Chemicals Corp
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General Aniline and Film Corp
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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
    • D01F4/00—Monocomponent artificial filaments or the like of proteins; Manufacture thereof
    • 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
    • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
    • Y10S516/01—Wetting, emulsifying, dispersing, or stabilizing agents
    • Y10S516/03—Organic sulfoxy compound containing
    • Y10S516/04—Protein or carboxylic compound containing

Definitions

  • This invention relates to a process to increase the viscosity of aqueous gelatin solutions.
  • the viscosity of aqueous gelatin solutions depends notoriously on several factors, as for instance gelatin quality, concentration, temperature, presence of hardeners and the like, and represents therefore a very variable indefinite quantity.
  • To work up technical gelatin solutions for instance to spin filaments or to cast gelatin layers for the manufacture of foils or coatings for sizes, protective layers and the like, it is of great importance to adjust the viscosity independently of other factors influencing the viscosity and to have means at hand which make it possible to increase the viscosity in a regulatable and sufficient manner without noticeably influencing on the other hand the physical or chemical properties of the gelatin solution.
  • An increase of the viscosity was hitherto accomplished by decreasing the temperature.
  • the increase of the viscosity of such gelatin solutions in a manner sufiicient for all requirements may be accomplished according to the present invention by an admixture of acyl amino compounds of aromatic sulfoand carboxylic acids, in which the acyl radical consists of an aliphatic group of at least 10 carbon atoms or contains such a group.
  • the aqueous solutions of these organic compounds show for themselves scarcely any higher viscosity than the solvent.
  • the increase of the viscosity is therefore connected probably with a colloid chemical reaction which advantageously is so, that the usual properties of the gelatin are unchanged, when added in normal proportions.
  • the naphthalene derivatives possess generally a higher effectiveness than the benzene derivatives.
  • the disulfo acids are often more effective. than the monosulfo acids which also show reduced solubility. Also polyacids are very well suited.
  • the sulfo acids may be employed also in the form of their salts or acid salts, if necessary together with organic bases. Their effectiveness is maintained also in various pH-regions. In the presence of soluble salts, for instance common salts, the effectiveness is somewhat decreased. The quantity of the admixture depends entirely on the desired effect. It is mostly suflicient to add 0.5-5% of the dry-weight of the gelatin, however more may be added.
  • the atom groupings mentioned are also effective, when they are contained in the dyestuffs. Besides numerous other azo-dyestuifs the one obtained from tetrazotized diamino diphenyl eyclohexane and 1-stearoylamino-8-naphthol-fi-disulfo-acid increases also the viscosity of gelatin solutions.
  • the radical of the stearic acid is of special interest, because it yields relatively high eflective compounds and also because the stearic acid is one of the cheapest of the respective acids.
  • acids with less C-atoms as for instance palmitic acid, myristic acid, lauric acid are well suited as substituents, naturally also longer-chained acids like eicosane acid or montanic acids or unsaturated acids like the undecylic acid, oleic acid, eruic acid or also substitution products of these fatty acids, as for instance oxy compounds, halogen compounds and polyvalent acids like octadecyl dicarboxylic acid, sulfo stearic acid and others.
  • the acids may also contain ring systems, as for instance the chaulmoogric acid or di-p-octadecyl benzoic acid.
  • the fatty acid may also be connected by intermediate members with the benzeneor naphthalene sulfo acids, as for instance by the acid radical of amino fatty acids, aromatic amino acids (amino benzoic acid, amino benzoyl benzoic acid) or mixed aromatic-aliphatic acids like benzyl amino carboxylic acid, i. e. acyl amino groups and acid groups may belong also to different ring systems.
  • Suitable compounds are for instance 2 stearoyl-amino-5-naphthol 7 sulfo-acid, 1- stearoyl amino 5 naphthol '7 sulfo-acid, 1- stearoyl amino 8 naphthol-3,6- disulfo acid, stearoyl-dehydrothio-p toluidinesulfo acid, 5- (m stearoylamino phenyl) -(naphtho-1',2' :2,3- imidazol) -5' ,7-disulfo-acid, l-(m-sulfo-phenyl) 3- (p-stearoyl-amino-phenyl) -pyrazolone- (5) 5- oleylamine-2,6-dimethylqulnoline 8 -sulfo-acid,
  • Process for increasing the viscosity of aqueous solutions of gelatin which comprises adjusting the necessary viscosity to the desired degree by adding a substance selected from the class consisting of acyl-amino compounds of aromatic sulfo and carboxylic acids, in which the acyl radical consists of an aliphatic group of at least 10 carbon atoms.
  • Process for increasing the viscosity of aqueous solutions of gelatin which comprises adjusting the necessary viscosity to the desired degree by adding a substance selected from the class consisting of acyl-amino compounds of aromatic sulfo and carboxylic acids, in which the acyl radical contains an aliphatic group of at least 10 carbon atoms.
  • Process for increasing the viscosity of aqueous solutions of gelatin which comprises adjusting the necessary viscosityto the desired degree by adding a substance selected from the class consisting of acyl-amino compounds of arcmatic sulfo and carboxylic acids, in which the acyl radical contains the salts of an aliphatic group of at least 10 carbon atoms.
  • Thickened aqueous solutions of gelatin containing an addition of a viscosity increasing agent selected from the class consisting of acylamino compounds of aromatic sulfoand carboxylic acids in which the acyl radicle consists of an aliphatic group of at least 10 carbon atoms.
  • a viscosity increasing agent selected from the class consisting of acylamino compounds of aromatic sulfoand carboxylic acids in which the acyl radicle consists of an aliphatic group of at least 10 carbon atoms.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Materials For Medical Uses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Medicinal Preparation (AREA)
US339588A 1939-06-03 1940-06-08 Process to increase the viscosity of aqueous gelatin solutions Expired - Lifetime US2265463A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2265463X 1939-06-03

Publications (1)

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US2265463A true US2265463A (en) 1941-12-09

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US339588A Expired - Lifetime US2265463A (en) 1939-06-03 1940-06-08 Process to increase the viscosity of aqueous gelatin solutions

Country Status (2)

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US (1) US2265463A (fr)
FR (1) FR906016A (fr)

Also Published As

Publication number Publication date
FR906016A (fr) 1945-12-20

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