摘要:
Polymeric, unquaternized or quaternized condensates which contain piperazine rings bonded via chain members are used as conditioners for the pretreatment of nonmetallic surfaces of moldings before their activation for subsequent chemical metallization. This procedure gives particularly uniform and well adhering metal coatings.
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:
Reactive dyeings on textile materials containing cellulose fibers are aftertreated with aqueous solutions of benzylated resins which are obtainable(a) by condensation of methylamine and epichlorohydrin or(b) by heating triethanolamine and/or triisopropanolamine in the presence of acidic catalystsand have been reacted with from 0.25 to 1 mole of benzyl chloride per mole of amine in the condensate.The dyed textile materials aftertreated in this manner possess good wet fastness.
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:
Alkali metal and alkaline earth metal salts of acyloxybenzenesulfonic acids of the formula I ##STR1## where R is a saturated or unsaturated alkyl radical of 1 to 17 carbon atoms or is phenyl which is unsubstituted or monosubstituted or disubstituted by alkyl of 1 to 3 carbon atoms, halogen, methoxy or nitro, are prepared by neutralization, by a method in which a liquid acyloxybenzenesulfonic acid of the formula I and an aqueous solution of an alkali metal or alkaline earth metal hydroxide, carbonate or bicarbonate are combined in water, at from 0.degree. to 60.degree. C. and while mixing thoroughly, so that the pH is kept at from 2.5 to 7.0, and, if desired, the resulting salt is isolated from the aqueous solution in a conventional manner.
摘要:
Cotton and cotton-containing fabrics are desized in strongly alkaline aqueous solution with an alkali metal hypochlorite by a process in which from 0.5 to 8.0 g/l of a tertiary hydroxyalkylamine which is soluble in aqueous alkaline solution, of an oxyethylated and/or oxypropylated ethylenediamine, of an oxyethylated polyethyleneimine, of malonic acid, of cyanuric acid, of a cyanuric acid derivative, of a urea derivative, of cyanoguanidine, of oxazolidone, of pyrrolidone, of N-methylpyrrolidone, of N-methylimidazole or of a mixture of these is added to the aqueous bath, as an activator for the hypochlorite. Activators for hypochlorite are used in the desizing of cotton and cotton-containing fabrics in strongly alkaline aqueous solutions.
摘要:
Iodine-containing block copolymers which contain from 5 to 25% by weight of bonded iodine, and which are based on iodine-free compounds of the formula IR(AB).sub.z Iwhereif z=1, R is hydrogen or a C.sub.1 -C.sub.18 -aliphatic hydrocarbon radical,if z.noteq.1, R is a z-valent aliphatic hydrocarbon radical of 2 to 8 carbon atoms, which may or may not carry up to z ethylene oxide units,z is from 1 to 6,A is a polymer or copolymer block of from 4 to 100 1,4-butylene oxide units and from 0 to 25 ethylene oxide units andB is a polymer or copolymer block of from 0 to 50 1,4-butylene oxide units and from 1 to 100 ethylene oxide units, the proportion of 1,4-butylene oxide being >50 mole % in A and
摘要:
Aziridinocarboxylic acid esters of polyols are manufactured by trans-esterification of the corresponding esters of lower alcohols, using magnesium oxide or calcium oxide as the trans-esterification catalyst; this method gives a higher yield and a purer product.
摘要:
A pulverulent coating agent which consists of a mixture of:A. a compound having at least two aziridine ring groupings per molecule;B a binder which contains hydroxyl groups and which is solid at ambient temperature; and optionallyC one or more other additives.The coating agent is particularly suitable for powder coating metal surfaces.
摘要:
A sample of a fuel/oil/additive mixture is metered continuously to a channel-like, inclined test element along which there is an increasing temperature profile. Under the increasing action of heat on the flowing mixture, solid residual products form on the test element after a certain flow distance. Their weight and the flow distance are evaluated in order to evaluate the additive.