Patents by Inventor Ludwig Schlafer

Ludwig Schlafer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4564672
    Abstract: New water-soluble azo compounds which have the general formula (1) ##STR1## in which K is the radical of a water-soluble coupling component which can couple at one or two positions in the molecule and which belongs to the series comprising aminobenzenes, phenols, naphthols, aminonaphthols, acylaminonaphthols, dihydroxynaphthalenesulfonic acids, phenylazoaminonaphtholsulfonic and naphthylazoaminonaphtholsulfonic acids, 5-pyrazolones and 5-aminopyrazoles and 2-hydroxy-6-pyridones, R represents an alkoxy group of 1 to 4 C-atoms and X a group of the formula --SO.sub.2 --CH.dbd.CH.sub.2 or --SO.sub.2 --CH.sub.2 --CH.sub.2 --Z in which Z is a group which can be eliminated under alkaline conditions, furthermore, the copper complex compounds of the above-mentioned metal-free compounds of the general formula (1).
    Type: Grant
    Filed: July 27, 1983
    Date of Patent: January 14, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Ludwig Schlafer
  • Patent number: 4473498
    Abstract: Novel organic, water-soluble compounds having fiber-reactive and fiber-finishing properties and containing, as a fiber-reactive group, one or two .beta.-chloroethylsulfonylmethyl-benzoic acid amide groups. These compounds can be prepared (1) by reacting novel .beta.-chloroethylsulfonylmethyl-benzoic acid halide compounds with an organic, water-soluble compound having fiber-finishing properties and containing one or two amino groups, or (2) analogously to known and usual procedures, from precursors containing the .beta.-chloroethylsulfonylmethyl-benzoic acid amide grouping. The novel fiber-finishing compounds are applied to and fixed on suitable fiber materials, especially cellulose fiber material and natural or synthetic polyamide fiber materials, by methods corresponding to those which are conventional for application and fixation of fiber-reactive compounds. The above-mentioned .beta.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: September 25, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Reinhard Hahnle
  • Patent number: 4415333
    Abstract: Solid, pulverulent dyestuff compositions of fiber-reactive dyestuffs, which compositions contain a condensation product formed from a dialkylnaphthalenesulfonic acid or a mixture of two or more dialkylnaphthalenesulfonic acids and formaldehyde, as an auxiliary intended to ensure the solubility of the dyestuffs in salt-containing and alkaline aqueous padding liquors.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: November 15, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Heinz Uhrig
  • Patent number: 4149850
    Abstract: The present invention provides liquid, aqueous dyeing preparations of a reactive dyestuff which in form of the free acid corresponds to the formula ##STR1## each containing 5 to 35% by weight of one of the aforesaid dyestuffs and furthermore 1 to 5% by weight of buffer substances which are not capable of reacting chemically with the reactive group and thus reducing the dyestuff yield, and having a pH-value of from 3 to 7, said dyeing preparations being suitable for the dyeing and printing of fiber materials on the basis of wool, silk, polyamide and natural or regenerated cellulose, according to the process which is common for reactive dyestuffs.
    Type: Grant
    Filed: February 3, 1978
    Date of Patent: April 17, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Konrad Opitz
  • Patent number: 4078884
    Abstract: Liquid aqueous dyeing preparations of fiber-reactive dyestuffs consisting ofA. a total of from 5 to 35 percent by weight of the two dyestuffs corresponding in the form of the free acids to the formulae (I) and (II) ##STR1## b. from 1 to 5 percent by weight of buffer substances not capable of being reacted chemically with the fiber-reactive grouping of the said dyestuffs, andC. from 94 to 60 percent by weight of water, and having a pH-value between 3 and 7,Said dyeing preparations being suitable for the dyeing or printing of wool, silk, fibrous materials consisting of polyamides, native or regenerated cellulose or blends of fibers containing one or more of the said fibrous materials.
    Type: Grant
    Filed: November 18, 1975
    Date of Patent: March 14, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Konrad Opitz, Ludwig Schlafer, Erwin Ungermann
  • Patent number: 4072463
    Abstract: The present invention provides liquid aqueous dyeing preparations of reactive dyestuffs which in the form of their free acid correspond to the formula (I)(ho.sub.3 s).sub.m -F-Z.sub.n (I) ,wherein F represents the radical of a dyestuff chromophore of an anthraquinone, a mono-, dis- or tris-azo dyestuff, or of a phthalocyanine dyestuff, the phthalocyanine dyestuffs as well as the azo dyestuffs possibly being present as complex metal compounds with Cu, Cr, Co, Ni or Fe as the complex-forming central atom, m represents an integer being 2 or above, for example an integer in the range of from 2 to 8, and n is an integer in the range of from 1 to 3, and Z stands for a fiber-reactive group, said dyeing preparations being suitable for the dyeing and printing of fiber materials on the basis of wool, silk, polyamide and natural or regenerated cellulose, according to the process which is common for reactive dyestuffs.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: February 7, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Konrad Opitz
  • Patent number: 4035351
    Abstract: Water-soluble monoazo-dyestuff of the formula ##STR1## IN WHICH R is alkoxy from 1 to 4 carbon atoms, alkyl from 1 to 4 carbon atoms, alkyl from 1 to 4 carbon atoms, chlorine or bromine, R' is hydrogen, lower alkoxy from 1 to 4 carbon atoms, lower alkyl from 1 to 4 carbon atoms, chlorine or bromine, and X is --SO.sub.2 --CH = CH.sub.2, --SO.sub.2 --CH.sub.2 --CH.sub.2 --OH, --SO.sub.2 --CH.sub.2 --CH.sub.2 --Cl, --SO.sub.2 --CH.sub.2 --CH.sub.2 --O--SO.sub.3 H, --SO.sub.2 --CH.sub.2 --CH.sub.2 --S--SO.sub.3 H, --SO.sub.2 --CH.sub.2 --CH.sub.2 --O--PO.sub.3 H.sub.2, --SO.sub.2 --CH.sub.2 --CH.sub.2 --N (lower alkyl).sub.2 or [--SO.sub.2 --CH.sub.2 --CH.sub.2 --N (lower alkyl).sub.3 ] .sup.(.sup.+) halide.sup.(.sup.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: July 12, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Ernst Hoyer
  • Patent number: 4029644
    Abstract: A water-soluble monoazo-dyestuff of the formula ##STR1## WHEREIN R represents lower alkyl or lower alkoxy, R' represents hydrogen, lower alkyl or lower alkoxy, X represents --SO.sub.2 --CH.sub.2 --CH.sub.2 --OH, --SO.sub.2 --CH.sub.2 --CH.sub.2 --O--SO.sub.3 H, --SO.sub.2 --CH.sub.2 --CH.sub.2 --O--PO.sub.3 H.sub.2, --SO.sub.2 --CH.sub.2 --CH.sub.2 --S--SO.sub.3 H or --SO.sub.2 --CH.sub.2 --CH.sub.2 --N (lower alkyl).sub.2, and n stands for the integer 1, 2 or 3 said dyestuffs being suitable for the dyeing or printing of nitrogen containing native or synthetic fibrous materials and particularly of native or regenerated cellulose fibres with high tinctorial strength, the dyeings and prints obtained on the cellulose fibres being distinguished by considerable fastness properties to wear, to processing and to use.
    Type: Grant
    Filed: November 6, 1975
    Date of Patent: June 14, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Fritz Meininger, Ludwig Schlafer
  • Patent number: 4014865
    Abstract: Monoazo compounds having in form of the free acid the formula ##STR1## in which R represents alkyl from 1 to 4 carbon atoms and X represents vinyl, .beta.-chloroethyl, .beta.-dialkylaminoethyl, .beta. -thiosulfatoethyl, .beta.-phosphatoethyl or .beta.-sulfatoethyl, said compounds representing dyestuffs being suitable for the dyeing and printing of native and synthetic nitrogen-containing fibers and being highly suitable for the dyeing or printing of cellulose fibers, yielding on said fibrous materials dyeings and prints of a rare and desired golden-yellowish tint of considerable tinctorial strength, excellent build-up and good to very good fastness properties.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: March 29, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Fritz Meininger, Ludwig Schlafer
  • Patent number: 4002606
    Abstract: New water-soluble monoazo compounds had been found which, in the form of the free acid, correspond to the formula ##STR1## in which A represents a phenyl radical of the formula ##STR2## in which THE SUBSTITUENTS R.sub.1 are the same or different and each is hydrogen, chlorine, lower alkyl or alkoxy, R.sub.2 is hydrogen, halogen, a sulfo group, a sulfonamide or a lower alkoxy group, R is hydrogen or lower alkyl, R' is hydrogen, a lower alkyl group or an optionally substituted phenyl group, and X is a vinyl group or a radical of the formula --CH.sub.2 --CH.sub.2 --Z wherein Z is an inorganic or organic radical capable of being split off by an alkaline agent. These compounds can be prepared by coupling of the corresponding phenyl diazo compounds with the corresponding aminonaphthalene coupling compounds in an acid to neutral medium.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: January 11, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Ernst Hoyer
  • Patent number: 4000966
    Abstract: Process for the manufacture of fast dyeings or prints on fibrous materials containing cellulose wherein metal containing reactive dyestuffs of the general formula ##SPC1##In whichM represents a cobalt or chromium atom,R represents a hydrogen atom, a halogen atom, a nitro, acetyl-amino,amino, or lower alkyl or alkoxy group containing from 1 to 4 carbon atoms,R' represents a hydrogen atom or an alkyl radical containing from 1 to 4 carbon atoms,R" represents a hydrogen atom, an alkyl radical containing from 1 to 4 carbon atoms or a phenyl rest which may be substituted andn is zero or the integer 1 andX represents the vinyl group or the radical of formula --CH.sub.2 --CH.sub.2 --Y in which Y represents a halogen atom, a sulfuric acid ester, thiosulfuric acid ester, phosphoric acid ester, dimethyl amino or diethyl amino group,Are applied onto the said fibrous materials and are fixed at a temperature within the range of from 0.degree. to 200.degree. C, preferably from 15.degree. and 150.degree.
    Type: Grant
    Filed: October 17, 1973
    Date of Patent: January 4, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Fritz Meininger, Ludwig Schlafer, Maria Kallay
  • Patent number: 3998586
    Abstract: Process for the differential dyeing of (1) mixtures of natural or synthetic or natural and synthetic fiber materials of polyamides having polyamide fibers which can be dyed in different depths of shade, or (2) of mixtures of polyamide fibers which can be dyed in different depths of shade, with other natural or synthetic fibers, which comprisesA. dyeing the said fiber materials at a temperature of from 60.degree. to 150.degree. C with an aqueous solution containing the red monoazo dyestuff of the formula ##STR1## B. PADDING THE SAID FIBER MATERIALS AT A TEMPERATURE OF FROM 20.degree. TO 60.degree. C with a dye paste containing the above-mentioned dyestuff and subsequently steaming them at a temperature of from 100.degree. to 150.degree. C.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: December 21, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Karl-Heinz Flemmig
  • Patent number: 3995993
    Abstract: It had been found that the dyestuff of the formula ##STR1## is very suitable in a differential dyeing process for the dyeing of polyamide fiber materials at a pH of 2 to 9; the dyestuff possesses a very good differentiating behavior and migrating behavior yielding dyeings of a high degree of evenness while it does not dye accompanying non-polyamide fibers, not even in traces.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: December 7, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Maria Kallay, Johannes Jeths