摘要:
The production of shining shaped articles coated with zinc or a zinc alloy by electrodeposition of zinc or a zinc alloy from acidic aqueous electrolytic baths which contain as essential components one or more zinc salts and, where appropriate, salts of the other alloy metals, one or more conducting salts, one or more surfactants and one or more brighteners, entails employing as brighteners compounds of the formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.8 -alkoxy, phenoxy, benzyloxy, amino, C.sub.1 -C.sub.6 -alkylamino or di(C.sub.1 -C.sub.6)alkylamino,R.sup.2 is C.sub.1 -C.sub.4 -alkyl, phenyl, benzyl or the meanings of R.sup.1, andAr is phenyl or naphthyl which can additionally be substituted by one to three C.sub.1 -C.sub.4 -alkyl groups or C.sub.1 -C.sub.4 -alkoxy groups.
摘要:
There are described rhodamine derivatives of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl, or R.sup.2 is paired off with R.sup.5 or R.sup.4 with R.sup.6 to form 1,3-propylene, which can be substituted,R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each hydrogen or methyl,R.sup.9 is hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl or a radical of the formula (C.sub.2 H.sub.4 O--).sub.n H, where n is 2 or 3, andAn.sup..crclbar. is the equivalent of an anion derived from an addition or condensation polymer that contains acid groups, novel cyclic rhodamine dyes, and the use of the novel rhodamine derivatives and cyclic rhodamine dyes for dyeing polyacrylonitrile fibers, for incorporation into polymers or for preparing inks.
摘要:
A process for chemically degrading cured amino resins comprises reacting cured amino resins, which may contain fillers, with a primary and/or secondary amine at from 40.degree. to 250.degree. C.
摘要:
N-Hydroxyazoles of the general formula I ##STR1## where A is ##STR2## and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.4 -alkyl or halogen, are prepared by a process in which an azole of the general formula II ##STR3## where A, R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, is reacted with hydrogen peroxide or an alkyl peroxide in the presence of a zeolite catalyst at from -20.degree. to 150.degree. C. and from 0.1 to 150 bar.
摘要:
Azo dyes useful for dyeing or printing textile fibers or fabrics and for thermal transfer have the formula ##STR1## where R.sup.1 and R.sup.2 are each substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl or substituted or unsubstituted C.sub.3 -C.sub.4 -alkenyl or R.sup.1 may also be hydrogen,R.sup.3 is hydrogen or C.sub.1 -C.sub.6 -alkyl,R.sup.4 and R.sup.5 are each hydrogen, C.sub.1 -C.sub.6 -alkyl, halogen, C.sub.1 -C.sub.6 -alkoxy, amino or mono- or di(C.sub.1 -C.sub.4 -alkyl)amino, andD is a radical of the thiophene, thiazole, isothiazole, benzothiophene, thienothiophene or thienothiazole series.
摘要:
Heterocyclic compounds which are useful as bleach activators or optical brighteners in washing and cleaning agents have the formula ##STR1## where the variables have the following meanings: X is O, S or the group N--R.sup.3, where R.sup.3 is hydrogen, C.sub.1 -C.sub.25 -alkyll C.sub.1 -C.sub.25 -acyl or an aryl group of up to12 carbon atoms,Y is CH or N,R.sup.1 for X=S or N--R.sup.3 is hydrogen, a C.sub.1 -C.sub.25 -alkyl or C.sub.2 -C.sub.25 -alkenyl group or a phenyl radical which may be additionally substituted by one or two C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, hydroxyl, carboxyl, sulfo, amino, C.sub.1 -C.sub.4 -acylamino, nitro or cyano groups or chlorine or bromine atoms, which substituents, if there are two of them, may be identical or different,R.sup.1 for X=O is phenyl, o-, m- or p-tolyl, p-chlorophenyl, m-nitrophenyl, m-methoxyphenyl or m-methylsulfonylphenyl,R.sup.2 for X=S or N--R.sup.3 is hydrogen, a C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, hydroxyl, carboxyl, sulfo, amino or C.sub.1 -C.sub.4 -acylamino group or a chlorine or bromine atom, andR.sup.2 for X=O is hydrogen.
摘要:
A process for the preparation of aromatic carbonyl or sulfonyl compounds with a diaryl ether structure by reacting phenols with halogenated carbonyl- or sulfonylaromatic compounds in a dipolar aprotic solvent is carried out in the presence of catalytic amounts of alkali metal nitrite or an aromatic nitro, nitroso, azo, azoxy or hydrazo compound.
摘要:
A process for the preparation of 2-hydroxy-4-(2'-hydroxyethoxy)benzophenones, by reacting 2,4-dihydroxybenzophenones with ethylene carbonate in the presence of a quaternary ammonium salt catalyst at elevated temperatures, and isolating the finished product from the crude reaction mixture.
摘要:
Isoindoline metal complexes of the formula I ##STR1## wherein R.sup.1 and R.sup.2 are independently of each other H or C.sub.1 -C.sub.4 -alkyl, X.sup..crclbar. is one equivalent of a colorless anion and Me is Zn.sup.2+, Ni.sup.2+, Co.sup.2+ or Cu.sup.2+, are suitable for pigmenting surface coatings, plastics and printing inks.
摘要:
Tetrachloro-3-iminosisoindolin-1-one (I) or its alkali metal salt (Ia) is prepared by reacting tetrachloro-ortho-phthalodinitrile with lithium hydroxide, sodium hydroxide and/or potassium hydroxide in substantially anhydrous tert-butanol and, if desired, liberating (I) from (Ia) by means of a dilute acid.