Bayer Aktiengesellschaft

Bayer Corporation

Miles Inc.

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Harald Pielartzik

Rolf-Volker Meyer

Aaron D Meltzer

Robert J Kumpf

Rolf Wehrmann

Burkhard Kohler

Hans-Joachim Traenckner

Douglas A Wicks

Hans-Detlef Heinz

Yun Chen

Rick L Archey

Rolf Dhein

Ralf Dujardin

Pramod Gupta

Erik H Jonsson

Robert Kumpf

Edgar Ostlinning

Helmut-Martin Meier

J&ouml;rg Hofmann

Philip E Yeske

Wolfgang Jakob

Hermann Brinkmeyer

Kristen L Parks

Dittmar K Nerger

Duane B Priddy, Jr

William C Bushong

Duane Priddy, Jr

Friedrich-Karl Bruder

Pieter Ooms

Wolfgang Ebert

Friedrich Jonas

Alexander Meyer

Klaus Reinking

Helmut-Werner Heuer

Helmut Ritter

Hanns-Peter Muller

Walter Schafer

Wolfgang Alewelt

Rudiger Schubart

Siegfried Korte

Bernd Klinksiek

Leo Morbitzer

Gerhard Fennhoff

Klaus Kircher

Richard Weider

Ralf Hufen

Jose F Pazos

Charles E Lundy

Joachim Franke

Peter-Roger Nyssen

Aziz El-Sayed

Walter Sch&auml;fer

Joachim Doring

Gunter Klug

Wolfgang Wehnert

Martin Wandel

Hanns-Peter M&uuml;ller

Christian Steinlein

Randall C Rains

Lambertus Groenendaal

Kurt P Meurer

Bernd Willenberg

Burkhard K&ouml;hler

Aziz E Sayed

Stephan Ehlers

Walter Schmitt

Dietrich Braun

Uli W Franz

Dittmar Nerger

Lars Obendorf

E Haakan Jonsson

Clifford J Lau

Matthias Kocher

Jeffrey S Wiggins

Wilfried Cramer

Robert-Joseph Kumpf

Bert Klesczewski

Raymond A Yourd

Axel Schnitzler

Gary W Munko

By Klaus Witte, Heir

Joseph W Witte, Deceased

Joachim Storsberg

Jos M J Paulusse

Method of producing &pgr;-conjugated polymers

The use of phenols having a branched structure as terminal groups in polycarbonates, polyester carbonates and polyesters is disclosed. Also disclosed are polycarbonates, polyester carbonates and polyesters having such branched terminal groups, the process for their production and molded parts made therefrom.

Polycarbonates, polyester carbonates and polyesters having branched terminal groups

The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising conducting a reaction mixture at least once through a zone which has an energy density of at least 5&times;10 J/m , wherein the dwell time of the reaction mixture in this zone is at least 10 seconds per pass.

Process for producing polyether polyols

The present invention relates to a process for the preparation of novel, partially crystalline polyether polyols with a functionality of &gE;2, an average molecular weight M of 500 to 100,000 and a molar proportion of isotactic triads determining the crystallinity of >28%. The new polyether polyols are prepared by polymerizing alkylene oxides in the presence of a bimetallic :-oxoalkoxide modified with hydroxyl compounds.

Method for producing partially crystalline polyether polyols

The present invention relates to mixtures of cyclic oligocarbonates, to their production by way of mixtures of bischloroformates, and to their use for the production of linear polycarbonates and for the modification of other linear polycarbonates.

Mixtures of cyclic oligocarbonates, their production and use

Polyether polyols are produced by acid-catalyzed polyaddition of alkylene oxides to starter compounds having active hydrogen atoms. Perfluoroalkylsulfonic acid salts of metals from Group IIIA of the Periodic Table of Elements (corresponding to the IUPAC Convention of 1970) are used as the catalyst. The polyaddition reaction is carried out at a temperature of from 40 to 200.degree. C. at normal pressure or pressures from 0 to 20 mbar (absolute). An inert organic solvent may optionally be included in the reaction mixture. Substantially all of the catalyst is removed from the polyether polyol-containing reaction mixture by lowering the temperature and/or by addition of a precipitating agent and/or by extraction with water. If desired, the recovered catalyst may be used in subsequent polyaddition reactions.

Process for the production of polyether polyols

The invention relates to novel zinc/metal hexacyanocobaltate complex compounds corresponding to the formula:

Zinc/metal hexacyanocobaltate complex compounds, a process for their

Process for the production of hydrogenated, ring-opened metathesis (co)polymers from cyclic olefins using the ruthenium-carbene complexes of the general formula (I) ##STR1## in which R.sub.1 and R.sub.2 mutually independently mean hydrogen, C.sub.2 -C.sub.20 alkenyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.1 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbon-yl,C.sub.1 -C.sub.20 alkylthio, which may optionally be substituted by C.sub.1 -C.sub.5 alkyl, halogen, C.sub.1 -C.sub.5 alkoxy or by phenyl optionally substituted by C.sub.1 -C.sub.5 alkyl, halogen, C.sub.1 -C.sub.5 alkoxy;

Process for the production of hydrogenated ring-opened metathesis

A process for the manufacture of cyclic oligocarbonate is disclosed. The process comprises a reaction of a bis-chlorocarbonic acid ester with isatinbisphenol or with a bis-chlorocarbonic ester thereof. The mixture of cyclic oligocarbonates thus prepared is useful as a precursor in the preparation of modified polycarbonate or polyester resins.

Mixtures of cyclic oligocarbonates and their manufacture

A process is disclosed whereby a polymeric resin (containing ester and/or carbonate bonds) is readily converted into a resin having a modified molecular structure. Accordingly, a polycyclic carbonate (a monomer or oligomer) is transesterified with the polymer resin in the melt, preferably upon extrusion, optionally in the presence of a catalyst. Significantly, the cyclic carbonates are, by the inventive process, inserted into the structure of the polymer, effecting branching of the molecular structure, a branching which manifests itself in the modified properties of the resin.

Method for modifying the backbone of polymeric resins

The invention is directed to a process for preparing SRIM molded article. The process broadly requires the use of a fiber reinforcement mat which is placed inside the mold cavity, and then a polyurethane reaction system is injected into the mold. The system comprising a polyisocyanate and a blend of active hydrogen containing compounds requires aldimines as part of the blend of active hydrogen containing compounds.

High heat resistant molded parts produced by structural reaction

The invention relates to a thermoreversible process for the preparation of a hydantoin comprisng

Thermoreversible coating and a process for its manufacture

A compatibilized thermoplastic molding composition containing polyurethane and polyolefin resins is disclosed. Accordingly, a particularly structured copolymer having a number average molecular weight of about 25,000 to 350,000 and containing blocks of monoalkylene arene and either hydrogenated conjugated diene or non-hydrogenated conjugated diene, was found to compatibilize the composition. Articles molded from the composition are characterized by their good mechanical properties.

Compatibilized thermoplastic molding composition

Block copolymers represented by the formula ##STR1## are formed by contacting an ester group containing poly(aryl ether ketone) composed of the recurring units ##STR2## with a liquid crystalline polyester represented by the formula ##STR3## in which R.sub.1, R.sub.2 X.sub.2, X, Z, E.sup.1, E.sup.2 E.sup.5, w, x, y, z a, b and n each represent specified groups or values under conditions such that a transesterification reaction will occur.

Poly(arylether)/liquid crystalline polyester block copolymers and a

Growing community of inventors

Krefeld, Germany

Harald Pielartzik