Bayer Aktiengesellschaft

Covestro Deutschland Ag

Bayeraktiengesellschaft

Saltigo Gmbh

Johannes Scherer

Alexander Klausener

Robert S&ouml;llner

Thomas Eckel

Horst Behre

Ralf Hufen

Timo Kuhlmann

Sven Hobeika

Bernd Griehsel

Andreas Job

Friedrich Müller-Hauck

Compositions are provided comprising A) at least one polymer selected from the group consisting of aromatic polycarbonate and aromatic polyester carbonate, B) at least one mixture comprising at least one butadiene-based graft polymer prepared by emulsion, suspension or solution polymerization and at least one polybutadiene-free vinyl (co)polymer, and C) at least one polymer additive, where the polybutadiene content based on the sum total of the parts by weight of components A and B is 10% to 20% by weight, and where the total content of butadiene-free vinyl (co)polymer from component B based on the sum total of the parts by weight of components A and B is 12% to 23% by weight. Composite components formed from these compositions and a polyurethane layer, which are notable for improved adhesion between the two layers, and a process for producing the composite components are also provided.

Polycarbonate compositions having improved adhesion to polyurethane layers

The present invention relates to an improved process for preparing N,N'-carbonyldiazoles by reacting azoles with phosgene.

Method for the production of N,N-carbonyldiazoles

The invention relates to an improved process for preparing 3-acyloxy-2-methylbenzoic acids by heating substituted naphthalenes in the presence of alkali metal hydroxides and subsequently acylating.

Preparation of 3-acyloxy-2-methylbenzoic acids

This invention relates to the preparation of N,N&prime;-carbonyldiazoles in a particularly advantageous manner by reacting corresponding azolide salts with phosgene in an aromatic compound or an ether as solvent. The azolide salts are preferably prepared by a novel process from an azole that is reacted with a compound of the formula M&prime;R or MgR Z&prime; in the presence of a solvent.

Process for the preparation of N,N&prime;-carbonyldiazoles and azolide salts

The invention relates to a process for the preparation of N,N&prime;-carbonyldiazoles by reacting azoles with phosgene in a solvent, whereby the azole and the phosgene are metered into an aromatic solvent dried by incipient distillation in such a way that in the time in which 1 mol of azole is metered in, from 0.17 to 0.34 mol of phosgene is metered in simultaneously.

Method for the production of n,n&prime;-carbonyldiazoles

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Leverkusen, Germany

Johannes Scherer