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| Number | Title | Issue Date |
| 7192534 | Low-VOC stuffing agents, the use thereof in the production and/or treatment of leather and skins and corresponding production or treatment method Agents for the fatliquoring of, in particular, leathers and hides tanned in the absence of chromium comprise A) at least one modified natural oil and B) at least one stabilizer LnR | 03/20/2007 |
| 7033402 | Transposed process for making leather The present invention relates to a novel leather making process whereby the post-tanning wet operations are done prior to tanning stage itself to make leather in eco-friendly manner in substantially shorter duration. The present process reduces the number of require... | 04/25/2006 |
| 6916348 | Dyed leather and method for dyeing tanned leather Tanned leather is (a) pretreated in an aqueous and alkaline medium either with ammonia, primary amines or a mixture of ammonia and primary amines and then with a polyfunctional organic compound containing at least one aldehyde group as a functional group, or (b) in ... | 07/12/2005 |
| 6753369 | Leather waterproofing formulation and leather goods waterproofed therewith The present invention relates to novel formulations for water proofing leather, a process for waterproofing leather, and leather goods waterproofed by the formulations and processes of the present invention. More specifically, the present invention relates to the us... | 06/22/2004 |
| 6685746 | Impregnation of leather with micro-encapsulated material A material is impregnated into leather by incorporating the material into micro-capsules and then applying said micro-capsules to said leather material by means of a suitable process. A roller coating process is described in which the material is applied ... | 02/03/2004 |
| 6395040 | Process for producing leather A method for producing leather generally including the steps of: (a) providing wet blue, full grain skins, (b) applying a liquid chrome solution to the skins while at a pH of 3.5 or lower, (c) raising the pH level of the skins to at least approximately 6.... | 05/28/2002 |
| 6033590 | Compositions for the preparation of leather Compositions for the simultaneous retanning and fatliquoring of leather are described which may include further leather treatment agents as well.... | 03/07/2000 |
| 5985167 | Wet treatment of leather hides Wet leather treating compositions and methods of wet treating leather hides employing alkylpolyglycosides for enhancing the penetration and absorption of the leather treatment formulations in an environmentally safe manner. The compositions are substantia... | 11/16/1999 |
| 5980578 | Process for waterproofing leather at low pH-values and leathers manufactured thereby The present invention relates to a process for waterproofing leathers, furs and other fibrous materials wherein waterproofing is carried out with conventional water repellents in the presence of dispersing or stabilizing auxiliary agents at pH-values of 3... | 11/09/1999 |
| 5972037 | Leather tanning processes and the products thereof The production of household-machine washable and dryable, waterproof, nonflammable, and extremely colorfast leathers from wet blue hides by a process which has the advantage that significantly reduced volumes of toxic wastes are generated. The wet blue hi... | 10/26/1999 |
| 5914442 | Aqueous solutions or dispersions of copolymers Aqueous solution or aqueous dispersion of copolymers suitable for the fatliquoring and filling of leather and fur skins are obtained by free-radical copolymerization of A1) C6 -C40 -monoolefins or C6 -C40 ... | 06/22/1999 |
| 5853427 | Use of polymerizable oil for leather fatliquor Novel fatliquoring compositions used for treating mineral-tanned leathers are effective substitutes for oils which have conventionally been used to soften leather. The compositions comprise monomers which polymerize in situ and soften the leather by break... | 12/29/1998 |
| 5807409 | Method of improving pull-up characteristic of leather substrate and modified finishing oil used therein The present invention provides for a method of improving the pull-up characteristic of a leather substrate darkened with a finishing oil modified by dissolving a modifier in a conventional finishing oil. The modifier may be polymerized from a monomer mix ... | 09/15/1998 |
| 5741434 | Leather oiling preparations and their use The present invention relates to the use of water-dispersible and/or water-emulsifiable amphiphilic co-oligomer of fatty crotonates and radical-copolymerizable hydrophilic ethylenically unsaturated acids and/or anhydrides thereof which may also contain sm... | 04/21/1998 |
| 5728313 | Leather oiling compositions and their use A method for oiling leather and skins by impregnating the leather and skins with partial esters of cyclic polycarboxylic acids or (partial) anhydrides with monofunctional fatty alcohols and optionally fixing the partial esters in the leather. Aqueous disp... | 03/17/1998 |
| 5725599 | Process for mineral tanning, re-tanning or leather after-treatment A process for the production of mineral tanned or/and re-tanned or/and after-treated leather or pelt, wherein before the mineral tanning, directly after the mineral tanning, directly before the mineral re-tanning, after the mineral re-tanning or/and with ... | 03/10/1998 |
| 5709714 | Method of treating leather with amphoteric polymers The present invention is directed to a method of treating tanned leather stock to improve its color expression characteristics. The method provides for utilizing a two-stage amphoteric polymers, which improve the color expression characteristic of the tan... | 01/20/1998 |
| 5702490 | Water repellent treatment of leather and skins with polysiloxanes functionalized with carboxyl groups in a comb-like manner Leather and skins are water repellent in aqueous emulsion in the presence of emulsifiers with polysiloxanes which are functionalized with carboxyl groups in a comb-like manner and in which the carboxyl groups are bonded to the polymer main chain via space... | 12/30/1997 |
| 5685880 | Leather modifier, process for modifying leather and modified tanned leather A leather modifier containing a compound which is obtainable through a reaction of an ethylene oxide derivative having a fluorine-containing group with a phosphorus compound is disclosed. A leather treated with the modifier has much improved properties.... | 11/11/1997 |
| 5686011 | Process for waterproofing materials having a fibrous structure and agents used to carry out this process A process is disclosed for waterproofing materials having a fibrous structure, such as leather, persian leather or leather replacement materials, by using waterproofing agents containing sulfosuccinic acid esters. Also disclosed are waterproofing agents u... | 11/11/1997 |
| 5683611 | Preparations for the oiling of leather Aqueous dispersions containing special aminopropionic acid derivatives and co-oligomers based on fatty crotonates are suitable for the oiling of leather. The leathers thus treated are distinguished by high resistance to washing and cleaning and by imperme... | 11/04/1997 |
| 5660759 | Cationic formulations for oiling leathers and skins The process of oiling leathers and furs by contacting the leathers and furs with an oiling composition containing esterquats corresponding to formula (I): ##STR1## in which R1 CO is an acyl radical containing 6 to 22 carbon atoms, R | 08/26/1997 |
| 5620748 | Use of graft polymers for fatliquoring and filling leather and fur skins Soft leathers with a pleasant hand are obtained on fatliquoring and filling leather and fur skins with water-soluble or water-dispersible graft polymers of vegetable and animal oils, obtainable by radically initiated polymerization A) of a monomer or mono... | 04/15/1997 |
| 5575939 | Process for softening/stuffing leather and fur skins The invention relates to a process for the fat liquoring/softening of leathers and furs by treatment with an aqueous dispersion of a copolymer obtainable by polymerization of a) maleic anhydride, b) C12 -C30 alpha-olefins, esters of ... | 11/19/1996 |
| 5571443 | Synergistic combination of 2-(thiocyanomethylthio)benzothiazole and thiophanate compounds useful as fungicides A method for preventing the deterioration of leather by controlling the growth of fungus, wherein the leather is contacted with TCMTB and a thiophanate compound present in a combined amount synergistically effective to control the growth of at least one f... | 11/05/1996 |
| 5567343 | New leather oiling preparations and their use An aqueous dispersion of amphiphilic co-oligomers for oiling leather or skins wherein the dispersion contains co-oligomers of (a) fatty crotonates, (b) radical-copolymerizable, hydrophilic, ethylenically unsaturated acids, anhydrides and mixtures thereof, wher... | 10/22/1996 |
| 5567205 | Wet treatment of leather hides Wet leather treating compositions and methods of wet treating leather hides employing alkylpolyglycosides for enhancing the penetration and absorption of the leather treatment formulations in an environmentally safe manner. The compositions are substantia... | 10/22/1996 |
| 5558675 | Process for aftertreating tanned leather and pelts A process for aftertreating tanned leather and pelts to impart a very soft and supple handle and good fullness to them, which comprises subjecting the leather or pelts to an aftertreatment with a polymer which is obtainable by (a) polymerising a monoethyl... | 09/24/1996 |
| 5554306 | Sulfited fatty compounds with a reduced content of free hydrogen sulfite Sulfited fatty compounds having a reduced content of free hydrogen sulfite are prepared by blowing unsaturated fatty compounds in an oxygen atmosphere at 100° C. to 150° C., sulfiting the blown fatty compounds with sodium metabisulfite, and subsequently... | 09/10/1996 |
| 5529704 | Leather fat-liquoring agents The present invention relates to a process for the preparation of a fat-liquoring compositions based on oxysulfited oils of animal and/or vegetable origin, the fatty substances employed containing a) 70-99% by weight of fatty substances of animal and/or vegeta... | 06/25/1996 |
| 5527360 | Fatliquoring, filling and hydrophobicizing leathers and furs A process for fatliquoring, filling and hydrophobicizing leathers and furs, comprises using ene adducts of maleic anhydride with unsaturated fatty acids of from 12 to 24 carbon atoms or their C1 - to C20 -alkyl or C2 - to ... | 06/18/1996 |
| 5525120 | Degreasing process The invention is a process for degreasing animal skins in which the animal skin to be degreased is contacted with a mixture of a predominantly saturated C12 -C18 fatty alcohol ethoxylate having an average of not more than 15 EO group... | 06/11/1996 |
| 5503754 | Wet treatment of leather hides Wet leather treating compositions and methods of wet treating leather hides employing alkylpolyglycosides for enhancing the penetration and absorption of the leather treatment formulations in an environmentally safe manner. The compositions are substantia... | 04/02/1996 |
| 5501707 | Aqueous dispersions of new amphiphilic co-oligomers for the washing- and cleaning-resistant oiling of leather and skins and their use The invention is a process for oiling of leather and skins which imparts washing and dry-cleaning resistance to the treated leather and skins and a composition useful in the process. The washing and dry-cleaning resistance of leather is improved by impreg... | 03/26/1996 |
| 5500020 | Process for titanium-based mixed tannings The tanning of skins is carried out using a titanium-based compound in a percentage of 5% to 10% and especially of 6% with respect to the pelt weight of the skins; a washing treatment is carried out between a basification phase and a further tanning phase... | 03/19/1996 |
| 5489389 | New leather oiling preparations and their use An aqueous dispersion of amphiphilic oligomers for oiling leather or skins wherein the dispersion contains anionically modified urethane fatty oligomers containing long-chain hydrocarbon fatty groups containing from 8 to 40 carbon atoms, together with sal... | 02/06/1996 |
| 5476517 | Use of guerbet alcohols for preventing fatty spew on leather The present invention relates to a composition and process for inhibiting fatty spew on leather comprising an oiling component in combination with a Guerbet alcohol having the general formula I: R1 --CH(CH2 OH)--R2 ... | 12/19/1995 |
| 5468255 | Use of nonionic organic dialkyl compounds for preventing fatty spew on leather The present invention relates to a fatty spew inhibiting composition for leather comprising an oiling component in combination with a dialkyl ether additive corresponding to general formula II: R3 --O--R4 ... | 11/21/1995 |
| 5464451 | Re-tanning process A process for the re-tanning of tanned leather or pelt, wherein the tanned leather pelt is re-tanned with (A) a polymeric carboxylic acid, containing -hydroxyacrylic units as constituent units of the polymer, optionally in salt form with the proviso tha... | 11/07/1995 |
| 5457835 | Leather Leather products that are well lubricated, impermeable and water-repellent are produced by impregnating tanned leather under alkaline conditions with an aqueous emulsion of an emlsifier carboxylic acids or anhydrides containing at least 16 carbon atoms, i... | 10/17/1995 |
