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7270985 |
Process for the preparation of aldehyde from a proteinous source for industrial applications
A process is disclosed to treat the protein hydrolysate, prepared conventionally from a proteinous source, with alkali metal hydride to obtain alcohol which is subsequently oxidized to obtain...
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7115387 |
Process for the preparation of aldehyde from a proteinous source for industrial applications
A process is disclosed to treat the protein hydrolysate, prepared conventionally from a proteinous source, with alkyl halide to obtain alcohol which is subsequently oxidized to obtain aldehyde...
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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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6846336 |
Acid-resistant solutions containing aromatic formaldehyde condensation products
The present invention relates to acid-resistant solutions containing aromatic formaldehyde condensation products having sulfonate and/or carboxylate groups, aliphatic carboxylic acids, aromatic...
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6827745 |
Mixture of THP and a moderator to tan leather
A mixture of THP and a moderator is used to tan leather. The moderator is selected from metaphosphates and polyhydroxy or polypyrolidyl compounds such as glycerol, carboxydrates PVA or PVP.
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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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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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5342916 |
Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases, and formaldehyde, and their use as tanning agents and as spraying aids for redispersible polymer powders
Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases and formaldehyde, obtainable by (A) sulfonation of phenols with from 1.0 to 1.5 moles of sulfuric acid per mole of...
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5264000 |
Aqueous solutions of synthetic tanning agents
Aqueous solutions of synthetic tanning agents comprising (A) a lithium salt of a synthetic, anionic aromatic tanning agent or the anionic non-condensed precursor thereof, and, as optional...
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5207802 |
Sulpho group-containing aromatic compounds, their production and use as dispersants or levelling agents in dyeing textiles or tanning leather
Compounds and mixtures of compounds obtainable by condensation of sulphonation products of defined alkyl-substituted naphthalenes and sulphonation products of optionally alkyl-substituted...
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4936864 |
Condensates of bis-(4-hydroxyphenyl) sulfone as tanning assistants, their preparation and use in the tanning of leather
A condensate of bis-(4-hydroxyphenyl) sulfone, an aldehyde, a dialdehyde and/or glyoxylic acid and aminoacetic acid or an N-substituted aminoacetic acid is prepared and used as a tanning assistant,...
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4828570 |
Tanning agent and a process for its preparation
Hides, skins and pelts are tanned by use of a tanning agent which comprises the reaction product of acetaldehyde, formaldehyde and a formylamino compound.
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4822372 |
Processing for tanning leather
An improved process for tanning leather by treating animal skins with a water-soluble melamine-formaldehyde resin in the presence of an acid catalyst towards the end is improved by using a...
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4810252 |
Process for tanning leather
Use of a resin mixture of, or of a mixed resin from, a melamine-formaldehyde resin and an anionically modified melamine-formaldehyde resin for tanning leather. The anionic modification of the...
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4675021 |
Amphoteric condensates and their use in retanning
Amphoteric condensates of the general formula I ##STR1## where A is a benzene or naphthyl radical, B is a radical derived from the group consisting of urea, biuret, dicyanodiamide or melamine, or a...
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4560384 |
Process for tanning hides
A process for tanning hides for soles or insoles with ammonium titanyl sulphate. The hides, subjected to soaking, liming, fleshing, and deliming, are first treated with ammonium sulphate....
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4403993 |
Preparation of water-soluble or self-dispersing resin tanning agents
Water-soluble or self-dispersing resin tanning agents are prepared by heating from 5 to 30% by weight of melamine, from 15 to 45% by weight of urea, from 20 to 35% by weight (calculated as...
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4390340 |
Tanning agent, its preparation and its use for retanning
Mineral tanned leather is frequently retanned with synthetic tanning agents to improve the fullness and softness, but leather retanned by the prior art methods is difficult to dye in full shades...
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4371637 |
Mixtures of reaction products based on epoxides, primary amines and fatty acids and of aminoplast precondensates, their preparation and their use as leather dressings
Mixtures of (1) reaction products obtained from (a) epoxides, for example polyglycidyl ethers of bisphenol A, (b) primary amines having 2 to 8 carbon atoms and (c) polymerized fatty acids, for...
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4247293 |
Sulphonated, aromatic reaction products, processes for their manufacture and their use as substances having a tanning action
The invention relates to sulphonated, aromatic reaction products as agents for tanning hides and leather. They are obtained by reacting a sulphonation product, which is previously formed from a...
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4245996 |
Condensation products of terphenylsulphonic acids, naphthalenesulphonic acids, bis-(4-hydroxyphenyl) sulphone and formaldehyde
Condensation products which are obtained by co-condensation, in an acid aqueous medium, of terphenylsulphonic acids, naphthalenesulphonic acid, bis-(4-hydroxyphenyl) sulphone and compounds which...
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4134867 |
Finishing of leather with reaction products of epoxides and fatty acids
A process for finishing leather is provided in which the leather is treated with a preparation containing (1) a reaction product of (a) an epoxide and (b) a dimerized or trimerized fatty...
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4074968 |
Retanning and fatliquoring agent
Sulfonated resins useful as retanning and fatliquoring agents are obtained by sulfonation of a condensation product of (a) one mole of a hydroxy aromatic component, (b) from about 0.05 to 1.5 mole...
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4018559 |
Non-rewet leather and method of producing same
The present invention relates to the treatment of leather and more particularly to a novel non-rewet dry cleanable leather, and the treatment method by which it is produced. The water-resistance...
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4009996 |
Reaction products of phenolsulphonic acid-urea-formaldehyde as tanning agents and process for their manufacture
The invention relates to reaction products of phenolsulphonic acid-urea-formaldehyde as agents for tanning of skins or leather. They are manufactured from a...
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3973904 |
Water-soluble synthetic tanning agents
Water-soluble synthetic tanning agents composed of formaldehyde condensation products of non-sulfonated aromatic hydroxy compounds or the sulfomethylation products thereof with aromatic sulfonic...
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3934975 |
Leather treating process
Leather treating compositions are prepared which comprise condensed or polymaric alkyl phenol phosphates generally and more particularly an alkylphenol-polyphenol condensate subsequently...
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3906037 |
Formaldehyde condensation products of terphenyl-sulphonic acids
Terphenyl-sulphonic acids of the formula ##SPC1## In which n denotes a number of 1 - 4, are condensed with formaldehyde or formaldehyde-yielding agents. The products are useful for the tanning,...
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3811832 |
TANNING IMPROVEMENTS
A process for tanning hides or skins comprises first treating the hides or skins with a basic salt of a multivalent metal; and then treating the hides or skins with a reaction medium containing a...
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3617186 |
TANNING WITH TRIS(HYDROXYMETHYL)NITROMETHANE AND A POLYHYDRIC PHENOL
A process for tanning skins in which skins are first impregnated and drummed at a pH range of 4.5 to 4.7 in a buffered aqueous solution containing tris(hydroxymethyl)nitromethane and a polyhydric...
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3533724 |
SUBSTANTIALLY DRY SYNTAN OR WASTE SULFITE LIQUOR PRETANNAGE OF VEGETABLE TANNED OR SYNTANNED LEATHER
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3521990 |
PROCESS FOR THE RAPID TANNING OF LEATHER
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3519378 |
PROCESS FOR THE RAPID TANNING OF MEDIUM-WEIGHT AND HEAVY LEATHER
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3512918 |
TANNING PROCESS
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3481903 |
CHELATING COMPOSITIONS COMPRISING PRODUCTS OF ALDEHYDES AND TRIAZINE DERIVATIVES
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3480379 |
TANNING OF LEATHER EMPLOYING SYNTHETIC ANIONIC TANNING AGENTS
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3477801 |
WATER SOLUBLE SYNTHETIC TANNING AGENT FOR PRODUCING SHRUNKEN GRAIN LEATHER
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3475113 |
PROCESS FOR TREATMENT OF LEATHER WITH CONDENSATES OF AMINOPLAST-SULFONATED PHENOLIC COMPOUNDS
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3462237 |
COMPOSITION OF MATTER
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3442859 |
CONDENSATES OF SULFONATED FORMALDEHYDE-MIXED PHENOLS CONDENSATES WITH FORMALDEHYDE AND A PHENOL
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3429649 |
PREPARATION OF CONDENSATION PRODUCTS
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3429648 |
DELIMING,BATING OR PICKLING WITH SOLUTION CONTAINING DIMETHYLSULFOXIDE
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3423452 |
SYNTHETIC TANNING AGENTS FOR PRODUCING SHRUNKEN GRAIN LEATHER
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3397941 |
RETANNAGE OF LEATHER WITH MELAMINE,DICYANDIAMIDE AND ALDEHYDE CONDENSATE REACTED WITH A LOW MOLECULAR AROMATIC SULFONATE
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3395175 |
Condensation products of formaldehyde and phenolic compounds useful for tanning
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3340215 |
Condensates of aminoplast-sulfonated phenolic compounds
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3327018 |
Fluorescent aldehyde-triazinyl stilbino condensation products
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3322488 |
Sulfomethylated bisphenol-formaldehyde condensation products used as dye resists for polyurethane and synthetic polyamide fibers
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3304346 |
Fluorescent triazinyl benzopyronealdehyde condensation products
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3279881 |
Tanning
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