摘要:
A tanning assistant useful in particular for tanning in combination with aluminum tanning agents is obtained by condensing melamine with glyoxal and/or glyoxylic acid and optionally with an aromatic compound which has a phenolic hydroxyl group or optionally with a condensable nitrogen compound.
摘要:
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, in a process for tanning leather in combination with, in particular, aluminum tanning agents.
摘要:
Dyed leather is aftertreated with quaternized condensation products ofA) a precondensate of one or more trialkanolamines of the Formula I ##STR1## B) a) a carboxylic acid derivative thereof IIa ##STR2## b) a carboxamide IIb ##STR3## c) an epichlorohydrin IIc ##STR4## d) a monofunctional compound IId R.sup.9 --Y IIde) a bifunctional compound IIeZ'--R.sup.10 --Z.sup.2 IIeC) a benzyl halide III ##STR5##
摘要翻译:染色皮革用A)A的一种或多种三链烷醇胺的预缩合物的季铵化缩合产物后处理a)其羧酸衍生物IIa b)甲酰胺IIb c) 表氯醇IIc d)单官能化合物IId R9-YIId e)双官能化合物IIe Z'-R10-Z2IIe C)苄基卤化物III III
摘要:
In a particularly time-saving and economical process for deliming hides, a cyclic ester of sulfurous acid with an aliphatic 1,2-diol is used as the deliming agent.
摘要:
Pelts and skin pelts can be self-tanned, pretanned and assist tanned and leather and skin can be retanned by using for this purpose the compound Ior an acetal thereof.
摘要:
Leather is dyed with pigments in an aqueous liquor at from 20.degree. to 60.degree. C. in the presence of an alkoxylated amine of 20 or more carbon atoms.
摘要:
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 phenol and(B) condensation of these sulfonation products with(a) from 0.5 to 1.8 moles of urea per mole of phenol,(b) from 0.001 to 0.5 moles of at least one other organic nitrogen-base per mole of phenol, and(c) from 1.0 to 3.0 moles of formaldehyde per mole of phenol.The condensation polymers are suitable for use as tanning agents in the leather and skin-producing industry and as spraying aids for redispersible polymer powders.
摘要:
Products of the condensation of phenolmonosulfonic acids, dihydroxydiphenyl sulfones, urea and formaldehyde can be obtained by(A) preparing a homogeneous reaction mixture in sulfuric acid from the phenolmonosulfonic acid and dihydroxydiphenyl sulfone in the molar ratio of from 3:1 to 10:1, with the proviso that the water content of the mixture is not more than 10% of the total weight of the components, and the mixture contains from 0.3 to 1.5 moles of sulfuric acid per mole of dihydroxydiphenyl sulfone, at from 100.degree. to 180.degree. C.,(B) subsequently, at from 40.degree. to 90.degree. C., carrying out a precondensation with 1 to 2 moles of formaldehyde and 0.5 to 1.5 moles of urea per mole of phenol units present in aqueous medium,(C) partially neutralizing the reaction mixture,(D) adding to the partially neutralized reaction mixture 0 to 0.5 mole of phenol per mole of phenol units present and then 0.1 to 0.8 mole of formaldehyde per mole of phenol units then present,(E) further condensing at from 40.degree. to 90.degree. C.,(F) shifting the pH of the reaction mixture into the neutral range and(G) subsequently acidifying with a weak acid.
摘要:
Copolymers which are obtainable by free radical copolymerization of (a) C.sub.8 --C.sub.40 -monoolefins with (b) ethylenically unsaturated C.sub.4 -C.sub.8 -dicarboxylic anhydrides by mass polymerization at from 80.degree. to 300.degree. C. to give copolymers having molecular weights of from 500 to 20,000 g/mol, subsequent solvolysis of the anhydride groups of the copolymers and partial or complete neutralization of the carboxyl groups formed during the solvolysis, in an aqueous medium by means of a base, and which are present in the form of aqueous dispersions or solutions, are used as agents for rendering leathers and skins water-repellent.
摘要:
Novel compounds of the general formula I ##STR1## where A is a fiber-reactive radical of the triazine, pyrimidine or vinylsulfone series, D is a radical of a sulfo-containing diazo component of the aniline or aminonaphthalene series, K is the radical of a coupling component of the aminohydroxynaphthalene series, X is fluorine, chlorine, bromine, C.sub.1 -C.sub.4 -alkyl, trifluoromethyl, C.sub.1 -C.sub.4 -alkoxy, phenoxy, hydroxysulfonyl, carboxyl, acetyl, propionyl, methylsulfonyl, ethylsulfonyl, phenylsulfonyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, phenoxysulfonyl or unsubstituted or substituted carbamyl or sulfamyl, and Y is fluorine, chlorine, bromine, C.sub.1 -C.sub.4 -alkyl, trifluoromethyl, C.sub.1 -C.sub.4 -alkoxy, phenoxy, phenoxysulfonyl, acetyl, propionyl, methylsulfonyl, ethylsulfonyl, phenylsulfonyl, p-acetylaminophenylsulfonyl, hydroxysulfonyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, hydroxycarbonyl or unsubstituted or substituted carbamyl or sulfamyl, are very useful for dyeing wool and hydroxyl-containing fibers, such as cellulose and in particular cotton.