Bayer Aktiengesellschaft

Rhone-poulenc Rhodia Aktiengesellschaft

Europeaische Wirtschaftsgemeinschaft

Europaeische Wirtschaftsgemeinschaft

Werner Mormann

Gabriele Leukel

Peter Haas

Martin Brahm

Johannes Blahak

Holger Meyborg

Barbara Brahm

Kuno Wagner

Gerhard Grogler

Manfred Bock

Jurgen Schwindt

Manfred Kapps

Hans-Walter Illger

Hans-Joachim Meiners

Ernst Meisert

Klaus Brecht

Wolfgang Krohn

Franz-Josef Bohne

Gerhard Henes

Christoph Irle

Joerg Zimmermann

Edith Hissmann

Kerstin Schmalz

Thomas Wagner

Tris-(cyanoto)-s-triazines and anisotropic duroplastic networks obtained

Antistrospic polymers and method of producing them

There is described a process for silylizing carbohydrates in liquid nitrogen compounds,

Process for silylizing carbohydrates, and use of the silylized

This invention relates to a process for preparing polyurethanes having liquid crystal properties comprising reacting, in proportions corresponding to an NCO/OH equivalent ratio of from about 0.9:1 to 1.1:1, an organic polyhydroxyl compound with an organic diisocyanate having at least two phenylene groups and at least one carboxylic ester group. The organic diisocyanate comprises an aliphatic diisocyanate wherein at least one of the carboxylic ester groups connects an aliphatic group to a phenylene group or an aromatic diisocyanate wherein at least one of the carboxylic acid groups connects two phenylene groups. This invention further relates to preferred diisocyanates used in the process according to this invention.

Process for the preparation of polyurethanes with liquid crystal

The invention relates to alternating copolymers having the formula ##STR1## wherein one of R.sup.1, R.sup.2, and R.sup.3 in each repeating unit is hydrogen and the others of R.sup.1, R.sup.2, and R.sup.3 in each repeating unit are CN or COOR.sup.5, wherein R5 is C.sub.1 -C.sub.8 alkyl; and n is from 10 to 5,000. This invention further relates to a process for preparing such alternating copolymers by copolymerization of appropriate alkenyl isocyanates and electron deficient olefins.

Alternating copolymers, a process for their preparation, and a method of

This invention relates to a novel process for the preparation of isocyanates containing silylated alcoholic or phenolic hydroxyl groups as substituents and to the use of the compounds obtained by this process as reactants for isocyanatocarboxylic acid halide in the preparation of polyisocyanates containing ester groups.

Process for the preparation of isocyanates and their use of the

This invention relates to a novel process for the preparation of isocyanates containing silylated alcoholic or phenolic hydroxyl groups as substituents and to the use of the compounds obtained by this process as reactants for isocyanatocarboxylic acid halides in the preparation of polyisocyanates containing ester groups.

Process for the preparation of isocyanates and their use for the

Isocyanates containing ester and/or amide groups are produced by reacting (a) an isocyanatocarboxylic acid chloride with (b) an organic compound containing a silylated alcoholic group and/or silylated phenolic hydroxyl group and/or silylated amino group which compound contains no other group which is reactive with isocyanate and chlorocarbonyl groups under the reaction conditions. The reaction of (a) with (b) is carried out at a temperature of from -20.degree. to 150.degree. C. This process makes it possible to produce the desired isocyanates with a high degree of selectivity.

Process for the production of isocyanates

The instant invention relates to a process for the production of polyurethane foams by reacting polyisocyanates with polyhydroxyl compounds of a specified molecular weight range in the presence of blowing agents and chain lengthening or cross-linking agents and optionally in the presence of catalysts, foam stabilizers and other additives generally known. The improvement resides in

Integral-skin polyurethane foams and process therefor

The instant invention is directed to a process for the production of a cellular polyurethane elastomer having a density of 0.45 to 0.8 g/cm.sup.3, comprising:

Process for the production of cellular polyurethane elastomers

The instant invention is directed to a process for the production of molded foams having a compact surface and cellular core and an integral density distribution over the cross-section of the body, comprising reacting

Process for the production of molded foams

A process is disclosed for producing polyurethane resins using novel catalysts selected from the group consisting of a process for the production of cellular or non-cellular polyurethane resins comprising reacting:

The production of polyurethane resins and laminates

This invention relates to a process for the production of polyurethane resins (more particularly foam resins) in which linear polyamines containing at least four tertiary nitrogen atoms are used as catalysts. The compounds correspond to the general formula: ##STR1## wherein the groups R, which may be the same or different, represent methyl or ethyl groups; m represents an integer of from 2 to 7; and the integers n, which may be the same or different, represent 2 or 3.

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Kreuztal, Germany

Werner Mormann