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.
摘要:
The invention describes new aromatic diisocyanates having the formulas: ##STR1## in which R is an alkyl radical with 1 to 12 carbon atoms. Preferably they are 1-alkyl-2-isocyanatomethyl-4-isocyanatobenzenes and/or 1-alkyl-4-isocyanatomethyl-2-isocyanatobenzenes and, particularly, 1-methyl-2-isocyanatomethyl-4- and -6-isocyanatobenzene and/or 1-methyl-4-isocyanatomethyl-2-isocyanatobenzene. The new diisocyanates are preferably prepared by phosgenation of the corresponding diamines and subsequent thermal cleavage of the carbamic acid chlorides formed on an intermediary basis and are used for the preparation of plastics, preferably of polyurethanes, and crop protection agents.
摘要:
A compound having the formula (I): ##STR1## wherein D is a radical of a heterocyclic or aromatic component selected from the group of aniline, anthraquinone, phthalimide or aminobenzene radicals, wherein the radical is unsubstituted or is substituted by fluorine, chlorine, bromine, nitro, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, trifluoromethyl, cyano, C.sub.1 -C.sub.4 -alkylsulfonyl, carboxylic acid ester groups, carbamyl, sulfamyl, 1,3,4- or 1,2,4-oxadiazolyl or acylamino groups; X is CO-- or --SO.sub.2 --; and R is an aliphatic, aromatic or heterocyclic radical selected from the group of C.sub.1 -C.sub.20 alkyl which is unsubstituted or is substituted by chlorine, bromine, cyano or dialkylamino groups; or phenyl or methyl groups unsubstituted or substituted by fluorine, bromine, methyl, ethyl, methoxy, ethoxy, cyano, carbamyl, sulfamyl or acylamino groups; or amino group; or a radical of the formula: ##STR2## wherein ring a is unsubstituted or is substituted by nitro, fluro, bromine or methoxy groups; and ring b is unsubstituted or is substituted by chlorine, bromine or nitro groups.The majority of the compounds of the formula (I) have yellow hues and are used as pigments in printing inks and finishes, and as disperse dyes for synthetic fibers.
摘要:
Fluorescent pigments have a mean particle size of from 8 to 16 lm and contain apolar polymer matrices based on polymethyl methacrylate, polystyrene, polybutadiene-modified polystyrene, polycarbonate, polyvinyl chloride or polyamide and one or more apolar fluorescent dyes of the coumarin or perylene series.
摘要:
A process for preparing a compound of the formula I ##STR1## where R.sup.1 to R.sup.4 are each, independently of one another, hydrogen, alkyl, alkoxy, hydroxyl or halogen, comprises reacting a compound of the formula II ##STR2## with a compound of the formula III ##STR3## in the presence of sulfur or a sulfur donor at elevated temperature. The compounds prepared according to the invention are suitable, for example, as diazo components.
摘要:
Cured aminoplast resins are recycled by a process in which said resins, which may contain fillers, are treated with an aqueous sulfite, hydrogen sulfite or disulfite solution and the resulting low molecular weight degradation products are used in chemical processes. The resulting low molecular weight degradation products of cured aminoplast resins are used for coating moldings, for tanning leather and skins and for the production of moldings which contain cured aminoplast resins or consist thereof.
摘要:
Thiazoleazo dyes useful for dyeing or printing textile fibers have the formula ##STR1## where R.sup.1 is hydrogen, substituted or unsubstituted C.sub.1 -.sub.6 -alkyl, halogen, substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxy, substituted or unsubstituted C.sub.1 -C.sub.6 alkythio, substituted or unsubstituted phenylthio, C.sub.1 -C.sub.6 -alkylsulfonyl, substituted or unsubstituted phenylsulfonyl or C.sub.1 -C.sub.4 -alkoxycarbonyl,R.sup.2 is cyano, C.sub.1 -C.sub.4 -alkanoyl, benzoyl, C.sub.1 -C.sub.6 alkylsulfonyl, substituted or unsubstituted phenylsulfonyl or a radical of the formula --CH.dbd.T, where T is the radical of an acidic CH compound,R.sup.3 is hydrogen, substituted or unsubstituted C.sub.1 -.sub.6 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, carbamoyl or mono- or di-C.sub.1 -C.sub.4 -alkylcarbamoyl,R.sup.4 is C.sub.1 -C.sub.6 -alkyl, substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxy, substituted or unsubstituted C.sub.1 -C.sub.4 -alkoxycarbonyloxy substituted or unsubstituted phenoxycarbonyloxy, substituted aminocarbonyloxy, substituted or unsubstituted C.sub.1 -C.sub.4 -alkanoyloxy, substituted or unsubstituted C.sub.1 -C.sub.4 -alkanoylamino or substituted or unsubstituted phenyl,R.sup.5 is hydrogen, substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl, or substituted or unsubstituted C.sub.3 -C.sub.5 -alkenyl, andR.sup.6 and R.sup.7 are hydrogen, halogen, cyano, substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl, amino or mono- or di-C.sub.1 -C.sub.4 -alkylamino.