US2581057A - Blue-fluorescent dyestuffs - Google Patents

Blue-fluorescent dyestuffs Download PDF

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US2581057A
US2581057A US2581057DA US2581057A US 2581057 A US2581057 A US 2581057A US 2581057D A US2581057D A US 2581057DA US 2581057 A US2581057 A US 2581057A
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blue
mixture
stilbene
product
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01Sulfonic acids
    • C07C309/28Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C309/45Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
    • C07C309/51Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton at least one of the nitrogen atoms being part of any of the groups, X being a hetero atom, Y being any atom
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C39/00Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
    • C07C39/205Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing only six-membered aromatic rings as cyclic parts with unsaturation outside the rings
    • C07C39/21Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing only six-membered aromatic rings as cyclic parts with unsaturation outside the rings with at least one hydroxy group on a non-condensed ring
    • C07C39/215Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing only six-membered aromatic rings as cyclic parts with unsaturation outside the rings with at least one hydroxy group on a non-condensed ring containing, e.g. diethylstilbestrol
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/134Brightener containing

Definitions

  • Example 1 A mixture of 25 parts of 4,4'-diamino-stilbene- 2',2'-disulfonic acid, 36 parts of 2,4,5-trimethoxybenzoic acid, 14.1 parts of phosphorus oxychloride and 150 parts of pyridine is heated at reflux for minutes. At the end of this time the reaction completey'as shown by treatment of a small portion of'the reaction mixture with cold nitrous acid and alkaline R-salt; a purple 'color indicates incomplete reaction. The hot mixture is drowned into 1000 parts-of water and made just alkaline with 19.5 parts of sodium hydroxide.
  • the drowned product is treated with 100 parts of salt, cooled to 25 C., filtered, Washed free of excess alkali with 5% salt solution and dried.
  • the pale tan product, sodium-4,4-bis(2,4,5 trimethoxy benzoylamino) stilbene 2,2 disulfonate is substantive. to cellulosic fiber from an aqueous bath and imparts thereto a strong blue fluorescence.
  • a mixture of 25 parts of 4,4'-diamino-stilbene- 2,2'disulfonic acid, 32 parts of 2,4,5-trimethoxybenzoic acid, 81.1 parts of diethyl-cyclohexylamine, 217 parts of xylene and 43 parts of toluene is distilled, approximately 72 parts of distillate being taken ofi so as to remove traces of water.
  • the mixture is cooled to 100 C., 10 parts of phosphorus oxychloride are added and the resultant slurry is heated at reflux for 2 hours. This is followed by two additions of 1.7 parts and one addition of 0.8 part of phosphor-us oxychlo- OCH;
  • the product in' the above two examples has been isolated as the sodium salt of the sulionic acid groups.
  • the product may be obtained as the di-potassium sulionate. Isolation as the free disulfonic acids can be effected by acidification of the condensation mass, and the products thus obtained may be reacted with ammonium hydroxide or any suitable organic or inorganic base, to yield the corresponding salt.
  • our novel compounds may also be used for various other purposes where fluorescence or absorption of ultra-violet light is desirable, for instance to achieve fluorescent efiects in costumes or stage settings, to achieve novel efiects onphotographic paper, as ultraviolet filters when impregnated on cellulosic fibers used for wrapping materials, etc.
  • M stands for a member of the group consisting of hydrogen, the alkali-metals and ammonia.

Description

Patented Jan. 1, 1952 UNITED STATES PATENT OFF-ICE 2,581,057 BLUE-FLUORESCENT DYES'I'UFFS Walter Stanley Earl Krahler,
signers to E. L'du Pont de Nemours pany, Wilmington, Del.
ware
No Drawing. Original application Valentine Wirth, Woodstown, N. J.,. and
Wilmington, Del; as- & Coma' corporation of Dela- October 15,
1948, Serial No; 54,814. Divided and this ap plication October 25, 1949, Serial 2 Claims.
No, 54,814, filed 00170- zoyl nuclei with alkoxy groups;
It is an object of this invention to provide new cellulose-substantive, blue-fluorescent dyestuffs, which are useful particularly for imparting whiteness to textile materials and related cellulosic fibers. Other and further important objects of this invention will appear as the description proceeds.
In copending application Ser. No. 29,664 it is taught that 4,4-dibenzoyl-diamino-2,2'-disulfostilbenes which carry in each benzoyl ring two alkyloxy radicals'in the positions 3,4 are substantive to cellulose and are characterized particularly by a pronounced bluish fluorescence, when illuminated by ultra-violet light. Thus, the compounds are characterized tby absorption of light in theultra-violet spectrum, with at leastone absorption maximum within theregion o-f 3000 to 4000 angstrom units. When cellulosic material, for instance textile fabric or paper, is treated with an aqueous solution of one of these compounds and then exposed to ultra-violet radiation, the cellulosic material glows with a bluish fluorescence.
We have now found that whitening agents of even greater potency are obtained by selecting for the purpose a bis-benzoylamino-stilbene disulfonate carrying in each benzoyl nucleus 3 methoxy groups, which are disposed in positions 2,4,5, the position of the CONE group being counted as 1, and the benzoyl radical being free of other substituents. Expressed in different words, we have discovered new and superior bluefluorescents in a limited group of compounds characterized by the following structure:
HaCO
division from our I30 and 2,497,131, respectively,
is essentially No.v 123,542
both issued on February 14, 1950.
Without limiting our invention, the following examples are given to illustrate-our preferred mode of procedure. Parts mentioned are by Weight.
Example 1 A mixture of 25 parts of 4,4'-diamino-stilbene- 2',2'-disulfonic acid, 36 parts of 2,4,5-trimethoxybenzoic acid, 14.1 parts of phosphorus oxychloride and 150 parts of pyridine is heated at reflux for minutes. At the end of this time the reaction completey'as shown by treatment of a small portion of'the reaction mixture with cold nitrous acid and alkaline R-salt; a purple 'color indicates incomplete reaction. The hot mixture is drowned into 1000 parts-of water and made just alkaline with 19.5 parts of sodium hydroxide. The drowned product is treated with 100 parts of salt, cooled to 25 C., filtered, Washed free of excess alkali with 5% salt solution and dried. The pale tan product, sodium-4,4-bis(2,4,5 trimethoxy benzoylamino) stilbene 2,2 disulfonate, is substantive. to cellulosic fiber from an aqueous bath and imparts thereto a strong blue fluorescence.
Example 2 [Using a procedure as described in U. S. Patent No. 2,497,131.]
A mixture of 25 parts of 4,4'-diamino-stilbene- 2,2'disulfonic acid, 32 parts of 2,4,5-trimethoxybenzoic acid, 81.1 parts of diethyl-cyclohexylamine, 217 parts of xylene and 43 parts of toluene is distilled, approximately 72 parts of distillate being taken ofi so as to remove traces of water. The mixture is cooled to 100 C., 10 parts of phosphorus oxychloride are added and the resultant slurry is heated at reflux for 2 hours. This is followed by two additions of 1.7 parts and one addition of 0.8 part of phosphor-us oxychlo- OCH;
OCH:
ride, each of which is followed by 1 hours reflux. The mixture is refluxed for 2 hours longer, cooled to below C., diluted with 500 parts of water and steam distilled with addition of a suflicient amount of sodium hydroxide to release the diethyl cyclohexylamine from its salts. Practically all the xylene, toluene and diethyl cyclohexylamine are contained in the oil layer of the distillate. After cooling the mixture, the product is filtered, washed with brine and dried. The product is identical with that obtained in Example 1.
The product in' the above two examples has been isolated as the sodium salt of the sulionic acid groups. lieu of sodium hydroxide, the product may be obtained as the di-potassium sulionate. Isolation as the free disulfonic acids can be effected by acidification of the condensation mass, and the products thus obtained may be reacted with ammonium hydroxide or any suitable organic or inorganic base, to yield the corresponding salt.
Evaluation of the product of Examples 1 and 2 above on textile fiber has shown it to be a bluefiuorescent dye capable of imparting a stronger whitening efiect to cellulosic fibers than other By using potassium hydroxide in weights of the particular substances required to achieve a certain degree of whitening assumed as standard.
Study of the above data shows the superiority on a weight basis of the new compounds of this invention as whitening agents over those previously disclosed.
In addition to producing a whitening eiiect upon textile material, our novel compounds may also be used for various other purposes where fluorescence or absorption of ultra-violet light is desirable, for instance to achieve fluorescent efiects in costumes or stage settings, to achieve novel efiects onphotographic paper, as ultraviolet filters when impregnated on cellulosic fibers used for wrapping materials, etc.
We claim as ourinvention:
l. A compound of the general formula OCHa , I WQGONHQCMH NHGOQM.
CH: 03M 80M CH3 compounds of the benzoylamino-stilbene-disulionic acid group which have previously been disclosed in the patent literature.
The following comparisons were made on dyeings of various fluorescents on paper, by using the beater-dyeing technique and judging the dyed paper in diffuse daylight:
General formula:
The column marked Grams shows the wherein M stands for a member of the group consisting of hydrogen, the alkali-metals and ammonia.
2. 4,4'-bis(2,4,5 trimethoxy benzoylamino)- stilbene-2,2-di(sodium sulfonate) WALTER VALENTINE W'IRTH. STANLEY EARL KRAHLER.
Z CMH NMOQY I OzNB OzNS REFERENCES CITED UNITED STATES PATENTS Name Date Eberhart Apr. 26, 1949 Number
US2581057D Blue-fluorescent dyestuffs Expired - Lifetime US2581057A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635113A (en) * 1950-10-27 1953-04-14 Du Pont Manufacture of bis(alkoxy-benzamido)-stilbene-disulfonates
US2671790A (en) * 1952-01-29 1954-03-09 American Cyanamid Co Acylation of aminosulfonic acids
US2676982A (en) * 1951-06-08 1954-04-27 Gen Aniline & Film Corp Fluorescent agents
US2688617A (en) * 1951-07-17 1954-09-07 American Cyanamid Co Sulfonated dihalogeno diaminostilbenes
US2700053A (en) * 1948-10-15 1955-01-18 Du Pont Blue-fluorescent dyestuffs
US2877218A (en) * 1953-12-30 1959-03-10 American Cyanamid Co Dyes from stilbene dicarboxylic acid amides

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468431A (en) * 1948-04-29 1949-04-26 American Cyanamid Co o-alkoxybenzoyl derivatives of 4, 4'-diaminostilbene-2, 2'-disulfonic acid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468431A (en) * 1948-04-29 1949-04-26 American Cyanamid Co o-alkoxybenzoyl derivatives of 4, 4'-diaminostilbene-2, 2'-disulfonic acid

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700053A (en) * 1948-10-15 1955-01-18 Du Pont Blue-fluorescent dyestuffs
US2635113A (en) * 1950-10-27 1953-04-14 Du Pont Manufacture of bis(alkoxy-benzamido)-stilbene-disulfonates
US2676982A (en) * 1951-06-08 1954-04-27 Gen Aniline & Film Corp Fluorescent agents
US2688617A (en) * 1951-07-17 1954-09-07 American Cyanamid Co Sulfonated dihalogeno diaminostilbenes
US2671790A (en) * 1952-01-29 1954-03-09 American Cyanamid Co Acylation of aminosulfonic acids
US2877218A (en) * 1953-12-30 1959-03-10 American Cyanamid Co Dyes from stilbene dicarboxylic acid amides

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