Basf Aktiengesellschaft

Basf Se Corporation

Friederike Osswald

Konrad Knoll

Till Gerlach

Michael Ishaque

Jochem Henkelmann

Philippe Desbois

Jan-Dirk Arndt

Hans-Michael Walter

Frederik Van Laar

Arnd Böttcher

Arnd Bottcher

Karl Heinz Brauch

A process for preparing 1,2-diamino-3-methylcyclohexane and/or 1,2-diamino-4-methylcyclohexane by reacting 2,3- and/or 3,4-diaminotoluene with hydrogen at elevated pressure and elevated temperature in the presence of a heterogeneous rhodium catalyst, wherein a mixture comprising 2,3- and/or 3,4-diaminotoluene, a dialkyl ether and/or alicyclic ether as a solvent and ammonia is initially charged in an autoclave in the presence of the catalyst and subsequently hydrogenated while supplying hydrogen.

Method for producing 1,2-diamino-3-methylcyclohexane and/or 1,2-diamino-4-methylcyclohexane

The present invention relates to mixtures comprising linear block copolymers made from vinylaromatic monomers and from dienes of the structure (I) S-B-Sand (II) S-B-S, where Sis a block made from vinylaromatic monomers with number-average molar mass Min the range from 40,000 to 100,000 g/mol, each of S, Sand Sis a block made from vinylaromatic monomers with number-average molar mass Min the range from 5,000 to 20,000 g/mol, each of Band Bis a block made from dienes or a copolymer block made from dienes and from vinylaromatic monomers with numberaverage molar mass Min the range from 15,000 to 40,000 g/mol, and the ratio of the block copolymers (I)/(II) is in the range from 0.6 to 2.

Transparent styrol-butadiene block copolymer mixtures

The invention relates to core-hydrogenated block copolymers composed of vinyl aromatic monomers and dienes having at least two blocks S, which are of different molecular weights and ate comprised of vinyl aromatic monomers. The invention also relates to mixtures containing core-hydrogenated polysterene and to methods for the production thereof.

Core-hydrogenated block copolymers having an asymmetric structure

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Mannheim, Germany

Friederike Osswald