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7771489 |
Formulation for use in chrome or chrome-free tannage
A formulation for use in chrome-free or chrome tanning is proposed, comprising a clay mineral which, after vigorous stirring for 30 minutes in water at 50° C., has a number average particle ...
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7753964 |
Method for producing a leather semi-finished product
A semifinished leather product is produced from an animal hide by pretanning with the use of a chromium-free tanning agent and of a clay mineral which, after stirring for 30 minutes in water at...
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7651531 |
Bio-tanning process for leather making
Conventionally skins/hides are tanned with metal-ions and vegetable tannins. Environmental constraints on the discharge of toxic metal-ions and poor biodegradable vegetable tannins in the...
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7637961 |
Composition and method for preparing leather
An oligomeric composition containing oligomers and at least one stabilizing component is provided. An aqueous dispersion composition containing the oligomeric composition is useful for treating...
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7479164 |
Calcification-resistant fixation
Non-glutaraldehyde fixation of an organ or a prosthesis for implantation in a mammal is based upon carbodiimide treatment. An aqueous solution containing a coupling agent, such as EDC, in...
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7410504 |
Adducts based on cyclic compounds and the use thereof as tanning agents and curing agents
Adducts are obtained by reacting carbonyl compounds of the formula I where R1 and R2 are as defined, with cyclic compounds of the formula II where X is selected from oxygen, sulfur and N—R8, R...
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7282066 |
Processes for preparing and using tanning agents and preservatives
A process for the preparation of aqueous formulations, and aqueous formulations so prepared, the process comprising heating at least one cyclic compound of the formula I in the presence of water...
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7169191 |
Process for preparing a synthetic aluminium tanning agent
A novel synthetic aluminium tanning agent as an alternative for chromium based tanning salts without using formaldehyde was prepared by using aromatic polymeric matrix and aluminium (III) salts as...
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7160480 |
Leather treated with fluorochemicals
A method of treating leather for imparting soil resistance to the leather by contacting the leather with a fluorinated hydrophobic additive comprising at least one fluorinated urethane or a mixture...
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7157017 |
Fungicidal compositions and methods using cyanodithiocarbimates
The invention relates to control fungal growth on tanned hides, using cyanodithiocarbimates of formula (I): X is a halogen;R is a substituted or unsubstituted C1–C14 alkyl group, a substituted or u...
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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...
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6991659 |
Production of tanned leather and products suitable therefore
The invention provides a process for the production of tanned and optionally retanned leather by treatment of an optionally (pre)tanned animal hide or pelt with an aldehyde-based treatment agent...
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6953483 |
Aloe vera processed leather and leather gloves, garments, shoes and sandals made from aloe vera processed leather and a process for making aloe vera processed leather
An aloe vera re-tanned leather for use in a glove, garment, sandal or shoe. The leather includes tanned leather having an internal fiber matrix. An aloe vera powder of aloe vera particles in a gel...
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6953486 |
Dyeing composition, method for obtaining the same and use for coloring the skin and/or keratinous fibres
Colouring composition, method for obtaining and using same for colouring skin and/or keratin matters. The composition comprises, in a physiologically acceptable medium, an efficient amount of at...
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6685747 |
Mixture of THP and chrome as tanning agents
THP and chrome are synergistic tanning agents. The combination of THP with small amounts of chrome and optionally non-ionic and/or cationic surfactants gives increased area yield and shrink...
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6478866 |
Aqueous pigment preparations
Aqueous pigment preparations containing a) at least one pigment, b) at least one condensation product based on A) suphonated aromatics, B) aldehydes and/or ketones and optionally C) one or several...
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6336942 |
Processes of treating leather and skins employing polymer compositions
Aqueous solutions or aqueous emulsions of copolymers are obtainable by copolymerization of (a) from 20 to 95 mol % of at least one monoethylenically unsaturated C4-C12-dicarboxylic acid or the...
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6251414 |
Aqueous formulation for pretanning raw hides
There is disclosed an aqueous formulation for pretanning leather, which formulation comprises(a) a reductive saccharide having a dextrose equivalent of 10 to 100, and(b) an aliphatic dialdehyde...
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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...
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6033442 |
Use of aqueous solutions or dispersions of copolymers of carboxyl-group-containing monomers, ethylenically unsaturated acetals, ketals or orthocarboxylic acid esters and optionally other copolymerizable monomers as leather tanning agents
The use of aqueous solutions or dispersions of copolymers composed of A) from 5 to 95 mol % of ethylenically unsaturated mono- or dicarboxylic acids having 3 to 10 carbons, their anhydrides, their...
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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...
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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...
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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...
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5900027 |
Process for preparing animal hides or pelts
In order to make processes for finishing animal hides or pelts less labor-intensive and more environmentally compatible, a process is proposed in which, following a conventionally conducted soak,...
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5885302 |
Leather tanning process
The present invention refers to a new process meant for chrome and/or vegetable leather tanning. The process proposed by the invention comprises the steps of bating or purging, conditioning, and...
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5820634 |
Process for tanning leather
Bisulphite-blocked, polyether-modified polyisocyanates are outstandingly suitable, in combination with mineral tanning agents, for the tanning of leather.
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5820633 |
Method of treating leather with improved retaining agents
The present invention is directed to a method of treating tanned leather to improve its dyeing characteristics while still retaining desired grain break and grain strength. The tanned leather is...
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5733340 |
Aqueous composition for the pretanning of hide pelts or retanning of leather
An aqueous composition for the pretanning of hide pelts or for the retanning of leather comprises (A) an aliphatic dialdehyde containing 2 to 8 carbon atoms, (B) an anionic aromatic tanning agent,...
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5733339 |
Process for fixation of calcification-resistant biological tissue
A process is provided for non-glutaraldehyde fixation of an organ or prosthesis to be implanted in a mammal. The process produces stable fixation of the tissue by forming amide linkages within and...
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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...
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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...
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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,...
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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...
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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...
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5658484 |
Agents and a process for waterproofing leathers and furs
The present invention relates to anhydrous and water-containing agents for waterproofing leathers and furs, which comprise a silicone and as emulsifier an alkyl polyalkylol ether carboxylic acid...
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5618317 |
Bisulfite-blocked polyisocyanates as tanning agents
The present invention relates to tanning agents containing carbamoyl sulfonate groups that are prepared by the reaction of(A) organic polyisocyanates,(B) 0.01 to 0.4 equivalents, relative to the...
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5580355 |
Leather tanning agent and standardizing agents for dyestuffs
Polyaspartic acid and its salts and anhydrides are outstandingly suitable as tanning agents, as retanning agents and as standardizing agents for dyestuffs.
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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...
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5534035 |
Leather treatment compositions
A copolymer for use in rendering leather water repellant is formed from ethylenically unsaturated monomer and ethylenically unsaturated monofunctional monomer, wherein the monomers include mono- or...
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5512058 |
Process for the treatment of skins, hides or shett materials containing collagen by a dense, pressurized fluid
A process for the treatment of products constituted by hides and skins with a view towards their transformation into leather, and for the treatment of leather which involves contacting the product...
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5505864 |
Tanning agent containing a dialdehyde
Tanning agents containing an ω,ω-dialdehyde as as the active tanning substance, optionally in a deactivated form, in combination with a polymer containing hydroxyl groups, and methods for using s...
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5501708 |
Process for tanning hides and compounds for use therein
An organic polyol ester of a polycarboxylic acid having formulae (Para) and/or (Meta) and/or (Ortho), wherein R6 is --(COOR1)x, or (I)1 R7 is H; or R6 and R7 together for (II); R1 and R2 are...
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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...
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5501709 |
Economy and plumping chrome tanning
The present invention relates to a process for economy and plumping chrome tanning by admixing the pelts in the pickle bath with an aldehyde- and/or keto-carboxylic acid and then tanning, which...
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5492539 |
Method of preparing leather from unhaired hides
Tanning agents containing an ω,ω-dialdehyde as as the active tanning substance, optionally in a deactivated form, in combination with a polymer containing hydroxyl groups, and methods for using s...
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5480456 |
Silica sols for obtaining a hide which is called a stabilized pickled or white or stabilized white
Use of an aqueous silica sol for obtaining a stabilized pickled white or a stabilized white from a hide, in particular by treatment of a hide at a pH between 1 and 8, at ambient temperature, in an...
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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...
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5472741 |
Softening and waterproofing retanning agents
Copolymers containing incorporated radicals of long-chain alcohols and neutralized carboxyl groups are suitable as retanning agents for leather. They result in an excellent combination of water...
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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...
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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 α-hydroxyacrylic units as constituent units of ...
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