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| Number | Title | Issue Date |
| 7833288 | Compositions for treating keratin and methods of use The disclosure relates to a method for applying to skin, an aqueous composition comprising one or more acid direct dyes and an organic solvent, wherein the composition has a pH of 2-6 and wherein the composition is free of anionic surfactants. The method also compri... | 11/16/2010 |
| 7824447 | Biological artificial ligament and method of making A prosthesis for implantation into a human body is made by a method that includes the steps of providing a natural animal ligament or tendon that has a substrate, crosslinking and fixing the substrate, minimizing the antigens from the substrate, tanning the substrat... | 11/02/2010 |
| 7776102 | Process for making a leather article structure The process for making a leather article structure consists of homogeneously applying a layer of substantially uniform thickness of an unpolymerised acetic silicone-based material onto the back of a leather layer, making it penetrate into the natural pores present o... | 08/17/2010 |
| 7182789 | Stabilised compositions containing polyfunctional aziridine compounds as hardening constituents The present invention relates to a composition comprising at least one polyfunctional aziridine compound and 1,4-diazabicyclo[2.2.2]octane. The present invention furthermore relates to the use of this composition as a curing component for formulations in the area of... | 02/27/2007 |
| 6855171 | Process for waterproofing leather and leather obtained by means of said process A process for waterproofing leather (1) includes pressing on the internal surface of the leather (1) at least one semi-permeable membrane (2) whose surface contacting the leather (1) is provided with a glue pattern. The glue pattern of th... | 02/15/2005 |
| 6663676 | Preparation of an aqueous composition for treating leather A method of preparing an aqueous composition for treating leather comprises adding a predetermined amount of a solid particulate leather treatment composition directly into a predetermined amount of water in a vessel at a tannery; and dissolving or disper... | 12/16/2003 |
| 6652597 | N-vinyl-containing polymeric tanning materials N-Vinyl-containing polymers obtainable by free-radically initiated polymerization of a monomer or monomer mixture of (A) from 5 to 100% by weight of an N-vinylamide or N-vinylamine, (B) from 0 to 95% by weight of monoethylenically unsaturated carboxylic ... | 11/25/2003 |
| 6599629 | Coated natural leather having low deformation Coated natural leather, prepared from natural leather having polyurethane coated on its flesh side and having an improved (decreased) measure of deformation, is provided.... | 07/29/2003 |
| 6589293 | Depilatory paint thickener comprising an anylopectin starch The invention relates to the dehairing (depilating) of animal pelts, hides or skins, more specifically to depilatory paint and depilatory paint (depilation paint) thickener used in the depilation process in for example fellmongeries. The invention provide... | 07/08/2003 |
| 6540790 | Tanning leather Leather is tanned by cross-linking collagen with tris(hydroxymethyl)phosphine or a condensate of a tetrakis(hydroxymethyl)phosphonium salt with an amide or amine in a main tannage or retannage.... | 04/01/2003 |
| 6375861 | Combination of active substances The present application relates to the use of combinations of active compounds composed of phenolic active compounds and azole compounds for the preservation of animal hides and leather.... | 04/23/2002 |
| 6294103 | Use of amphiphilic copolymers containing a fluorinated monomer to impart waterproofness to leather The present invention provides an amphiphilic copolymer comprising recurring units (I) and (II), wherein: Rf represents a fluorinated alkyl group having at least 3 carbon atoms; Q and Q' each independently represents an organic liking group or ... | 09/25/2001 |
| 6242554 | Polysiloxanes having polyether quat functions The invention relates to novel polyether-quaternary organosiloxanyl derivatives, to the preparation of these compounds and to their use in formulations for improving the surface properties of fabrics and fibers.... | 06/05/2001 |
| 6200640 | Polymer composition and process for treating leather and fur skins Aqueous solutions or dispersions of copolymers obtainable by free-radical copolymerization of (a) from 20 to 90% by weight of at least one monoethylenically unsaturated C4-6 -dicarboxylic acid or the anhydride thereof, as component A, (b) from 5 to ... | 03/13/2001 |
| 6133372 | Aqueous polymer dispersion, process for preparing the same and its use in leather production Aqueous polymer dispersions are produced by polymerizing monoethylenically unsaturated monomers bearing acid groups in an acid, partially or totally neutralized form, optionally with other monomers that can be copolymnerized therewith in the presence of h... | 10/17/2000 |
| 6110230 | Use of carboxyamide-polysiloxanes for water proofing leather Specific carboxyamide-polysiloxanes of the formula IV ##STR1## or the formula IVa ##STR2## having a carboxyl content of from 0.02 to 1.0 mmol/g and an average molar mass (number average) [Mn ] in the range from 2×103 to ... | 08/29/2000 |
| 6083414 | Composition of a mixture of a phenolic compound and an azole or morpholine compound to protect animal hides and leather against microbes The present application relates to the use of combinations of active compounds composed of phenolic active compounds and azole compounds for the preservation of animal hides and leather.... | 07/04/2000 |
| 6043362 | Hydrophilic permanent organosilicon compounds The invention relates to oxyalkylene-group-containing organosilicon compounds having units of the formula ##STR1## where R is identical or different, and denotes a monovalent halogenated or nonhalogenated hydrocarbon radical, X is identical or differ... | 03/28/2000 |
| 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 |
| 5998562 | Permanent organosilicon compounds, their preparation and use The present invention relates to triazine-containing organosilicon compounds having units of the formula Aa Rb Xc SiO.sub.(4-a-b-c)/2 (I), where R is identical or different and denotes a hydrogen atom or a monovalent ... | 12/07/1999 |
| 5948123 | Coloring method for hides A coloring method, wherein coloring agent or pigment is injected into active cells of an animal hide before the hide is harvested, and a coloring agent injection device with one or more needles, which are injected into the active cells of the hide of an a... | 09/07/1999 |
| 5945027 | Method of using bile salts to inhibit red heat in stored brine-cured hides and skins Halophilic bacteria have been shown to cause red heat on brine-cured hides, resulting in extensive damage to leather made from the hides. The addition of bile salts to raceways or to hides directly has been found to prevent the occurrence of red heat by i... | 08/31/1999 |
| 5911901 | Leather waterproofing method and composition Disclosed is a novel composition for improving the hydrophobicity of leather and leather substitutes, which comprises an aqueous dispersion of an unreacted mixture of a relatively inert dimethyl 50 cst silicon fluid, ammonium oleate, and water.... | 06/15/1999 |
| 5888415 | Method of using a mixture of a phenolic compound and an azole or morpholine compound to protect animal hides and leather against microbes The present application relates to the use of combinations of active compounds composed of phenolic active compounds and azole compounds for the preservation of animal hides and leather.... | 03/30/1999 |
| 5817428 | Process for formation of epoxy resin/hide composite materials and materials obtained A process for the formation of epoxy resin/hide composite materials is provided in which the components of epoxy resin systems (epoxy resin and hardener) are mixed at a temperature lower than that at which significant reaction between these reagents occur... | 10/06/1998 |
| 5770264 | Anionically modified polyurethane ureas having reduced tackiness for the coating of leather This invention relates to a method for coating leather with an anionically modified polyurethane urea prepared by (1) reacting (A) an aromatic diisocyanate, (B) a polyether polyol having a number average molecular weight greater than 1500, (C) at least one com... | 06/23/1998 |
| 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 |
| 5716676 | Aqueous coating compositions and their use for the preparation of coatings that are permeable to water vapor The invention relates to the use of coating compositions to prepare coatings having water vapor permeabilities of at least 2500 g/m2 per day (DS 2109 TM1 method) containing (A) a polyurethane containing (1) 0.1 to 75 meq/100 g of ionic groups and ... | 02/10/1998 |
| 5714560 | Water-soluble or water-dispersible graft polymers of proteins as leather tanning agents Water-soluble or water-dispersible graft polymers which are obtainable by free-radical-initiated polymerization of (A) a monomer or monomer mixture comprising (a) from 20 to 100% by weight of acrylic acid or methacrylic acid or a mixture thereof or alkali meta... | 02/03/1998 |
| 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 |
| 5676707 | Leather coloring process comprising jetting ink onto a treated leather Provided is a leather treatment process for leather coloring, carried out on a leather to be colored with a liquid ink, the process comprises the steps of, imparting to the coloring surface of the leather a resin soluble in the liquid ink and imparting to... | 10/14/1997 |
| 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 |
| 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 |
| 5490865 | Method of treating and dyeing animal fibers The present invention is a process for producing two-tone or multi-color effects on animal fibers and the products derived from these fibers. Pretreatment of the fibers to increase the affinity of the fiber relative to metallic salts or dyes for is accomp... | 02/13/1996 |
| 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 |
| 5466263 | Process for dyeing fur skins with oxidation dyes The invention relates to a process for dyeing fur skins with oxidation dyes following a pretreatment, which comprises pretreating the fur skins with a metal mordant that contains glyoxylic acid.... | 11/14/1995 |
