Abstract: Heat-sealable, white-opaque, biaxially oriented, multilayer polypropylene film, process for the production thereof, and the use thereof. The invention relates to a heat-sealable, white-opaque, biaxially oriented, multilayer polypropylene film comprising a core layer and at least one interlayer arranged there.

Abstract: The invention relates to a process for the preparation of substituted 3-arylquinazoline-2,4-diones of the formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined in claim 1 and Ar is ##STR2## where R.sup.5 to R.sup.9 are as defined in claim 1, by reacting a compound of the formula (II) ##STR3## with a compound Z in the presence of a catalyst, a ligand and a solvent, where Z isa) an anthranilic acid derivative of the formula (III) ##STR4## or b) an alcohol R.sup.10 --OH and where, in case b), the resulting carbamate is then reacted with an anthranilic acid derivative of the formula III.

Abstract: The invention relates to a peelable, oriented, opaque, multilayer polyolefin film comprising at least one opaque layer and a peelable top layer. All layers of the film are essentially vacuole-free. The opaque layer contains pigments having a mean particle diameter of from 0.01 to 1 .mu.m.

Abstract: In the conventional methods for the preparation of printing pastes containing couplable diazonium compounds, liquid bases, sodium nitrite and phosphoric acid are incorporated separately in succession in the thickener or they are each prepared as separate thickeners and then combined with stirring only when they are used. Such measures are relatively complicated and are therefore considered as a disadvantage in practice. If the acids customary for the diazotization are used, there is a further risk that the fixation by steaming of the reactive dyes printed in addition to the diazo components will be impaired.This situation considered problematical by persons skilled in the art can be remedied by using liquid water-based preparations of diazotizable amines which, in addition to the amine, simultaneously contain the amount of acid necessary for its diazotization in the form of, preferably, phosphoric acid.

Abstract: Novel bis-phosphonium salts of the general formula ##STR1## in which R.sup.1 stands for a straight or branched alkyl group having from 1 to 12 carbon atoms,R.sup.2 stands for methyl, ethyl, n-propyl or iso-propyl, andX.sup..crclbar. stands for a monovalent anion or complex anion, or2 X.sup..crclbar. stands for a bivalent inorganic anion, are made.To this end, a triorganylphosphonium alkylide of the general formula R.sub.3.sup.1 P=CHR.sup.2 is reacted with an anhydrous copper(II)-halide in a solvent at temperatures of -78.degree. C. to 0.degree. C. with agitation, precipitated bis-phosphonium dihalogenocuprate(I) is separated and, if desired, converted by metathesis into another bis-phosphonium salt.