摘要:
Cationic dyestuffs of the formula ##STR1## wherein R.sub.1 represents a lower alkyl, alkenyl or hydroxyalkyl radical,R.sub.2, R.sub.3, R.sub.5 and R.sub.6 represent hydrogen or a lower alkyl or alkenyl radical,R.sub.4 represents a lower alkyl, alkenyl or alkoxy radical andX.sup.- represents an anion,are suitable for dyeing and printing natural and synthetic materials, in particular polyacrylonitrile and acid-modified polyamides and polyesters.
摘要:
A process for the production of polyamides by the polycondensation of aqueous solutions of salts of diamines and dicarboxylic acids by continuously introducing the aqueous salt solution into a precondensate melt under atmospheric pressure and simultaneously distilling off the water and maintaining the temperature of the melt at a minimum temperature of 180.degree. C.
摘要:
Dyestuffs of the formula ##STR1## wherein R.sub.1 -R.sub.2 denote hydrogen, alkyl, halogenoalkyl, halogen, alkoxy, alkylmercapto, alkylsulfphonyl, alkoxysulphonyl, alkylcarbonyl, alkoxycarbonyl, nitro or cyano,X and Y denote ##STR2## and R.sub.13 and R.sub.14 denote hydrogen, alkyl, halogenoalkyl, cyanoalkyl, cycloalkyl, aryl or aralkyl,and whereinX and R.sub.2, Y and R.sub.10, R.sub.1 and R.sub.2, R.sub.5 and R.sub.6, and R.sub.9 andR.sub.10 can form a 5-membered or 6-membered ring andA.sup.(-) denotes an anion,can be obtained in excellent purity when the hot reaction melts obtained by known processes are introduced into a two-phase system consisting of water and an organic solvent which is not water-miscible or which is water-miscible to a limited extent, and the dyestuffs are separated off.
摘要:
Stabilized polyamides containing from 0.02 to 5%, by weight of a diphenylamine compound corresponding to the following general formula: ##STR1## wherein R.sup.1 and R.sup.3, which may be the same or different, represent hydrogen, a CH.sub.3 --, C.sub.2 H.sub.5 -- or isopropyl group and R.sup.3 is in the o-, m- or p-position to the N-atom substitution;R.sup.2 represents hydrogen, a C.sub.4 -C.sub.12 alkyl, C.sub.7 -C.sub.12 aralkyl or C.sub.5 -C.sub.12 cycloalkyl group and is in the o-, or p-position to the N-atom substitution;n represents an integer of from 1 to 29; andY is a divalent, non-mono-olefinically unsaturated radical having the same meaning as R.sup.2 and, in addition, may represent (in a proportion of up to 50 mole percent) --S--, --CH.sub.2 --S--CH.sub.2 --, --CH.sub.2 --O--CH-- or >CH--R.sup.4, wherein R.sup.4 represents H, C.sub.1 -C.sub.6 alkyl or C.sub.5 or C.sub.6 cycloalkyl, and may be in the o- or p-position to the N-atom substitution.
摘要:
Phosphorous acid esters obtained by reacting bisphenols with phosphorous trihalogenide or triphosphite and optionally or mono- or polyhydroxy compound are especially useful for stabilizing polyamides.
摘要:
To prepare basic dyestuffs of the general formula ##STR1## in which A and B independently of one another represent a hetero-aromatic radical or a radical of the general formula ##STR2## compounds of the general formulaA--CH.sub.2 --BA and B have the abovementioned meaning,are oxidized with oxygen in the presence of a nucleophilic compound of the general formulaD--Hand in the presence of catalytic amounts of benzoquinones substituted by halogen or cyano or of phenanthrenequinones substituted by nitro, and in the presence of catalytic amounts of nitrogen oxides--with the exception of dinitrogen monoxide--or of substances which produce such nitrogen oxides under the reaction conditions.
摘要:
In order to prepare basic dyestuffs of the general formula ##STR1## in which A and B independently of one another represent a hetero-aromatic radical or a radical of the general formula ##STR2## in which Ar denotes the grouping ##STR3## in which Y represents hydrogen or a non-ionic substituent andn represents a number between 1 and 4, andR.sub.1 and R.sub.2 represent hydrogen or alkyl, aryl or aralkyl which is optionally substituted by non-ionic or acid groups, or together, or with the o-position of Ar, form a heterocyclic ring,D denotes hydrogen, alkyl, aryl which is optionally substituted by neutral or acid groups, or a hetero-aromatic radical andX.sup.- represents an anion,compounds of the general formula ##STR4## in which A, B and D have the abovementioned meaning, are oxidized with oxygen in the presence of catalytic amounts of benzoquinones which are substituted by halogen or cyano or of phenanthrenequinones which are substituted by nitro, and in the presence of catalytic amounts of nitrogen oxides, with the exception of dinitrogen monoxide, or of substances which produce such nitrogen oxides under the reaction conditions.
摘要:
Phosphorous acid esters obtained by reacting bisphenols with phosphorous trihalogenide or triphosphite and optionally or mono - or polyhydroxy compound are especially useful for stabilizing polyamides.