Bayer Aktiengesellschaft

Peter Mues

Hans-Josef Buysch

Christian Lindner

Karl-Heinz Ott

Herbert Eichenauer

Edgar Leitz

Bert Brassat

Hartwig Hocker

Helmut Keul

Hanns P Muller

Lothar Puppe

Reinhold M Klipper

Peter M Lange

Heinrich Heine

Gunter Klug

Dimitrios Kerimis

Para-substituted o-benzylphenols are prepared by reacting p-substituted phenols with benzylating agents in the presence of zeolites of the faujasite type at elevated temperature.

Process for the preparation of P-substituted O-benzylphenols

Thermoplastic block copolymers of the idealized formulae (I)

Thermoplastic block copolymers based on cyclic carbonates or esters

The process according to the invention is particularly suitable for the preparation of aliphatic spiroorthocarbonates. For the preparation of aliphatic spiroorthocarbonates of the formula ##STR1## in which dichloromethane derivatives of the formula

Process for the preparation of cyclic aliphatic orthocarbonic esters new

Process for the polymerization of cyclic aliphatic carbonates in the presence of aprotic organic solvents with exclusion of atmospheric oxygen and atmospheric moisture, wherein organometallic compounds of elements of main group 1 of the periodic table are used as initiators, the monomer/solvent ratio is in the range from 1 part by weight to 50 parts by weight of monomer per 100 parts by weight of solvent and the polymerization temperature is between -100.degree. C. and +20.degree. C.

Process for the preparation of linear aliphatic polycarbonate from

The invention relates to a new process for the preparation of thermosetting aliphatic polycarbonates from cyclic aliphatic carbonic acid ester by ring-opening polymerization.

Process for the preparation of thermosetting aliphatic polycarbonate

The invention relates to a novel process for the production of duromeric aliphatic polycarbonates from cyclic aliphatic carbonic esters by ring-opening polymerization.

Process for the production of duromeric aliphatic polycarbonates

Dialkyl vinylphosphonates are prepared by heating the new dialkyl 2-alkylcarbonatoethanephosphonates in the presence of catalysts. Also disclosed is a process for making the new dialkyl 2-alkylcarbonatoethanephosphonate by transesterification of a dialkyl 2-carboxyethanephosphonate with a dialkyl carbonate in the presence of a transesterification catalyst.

Dialkyl 2-alkylcarbonatoethanephosphonates

Substituted ethyleneureas are prepared by reacting appropriate .beta.-hydroxyethylureas with alkyl carbonates in the presence of catalysts at an elevated temperature. Substituted ethyleneureas are used, inter alia, as polymerization and copolymerization components for the preparation of plastics, coatings, surface finishes and ion exchangers.

N-phenyl-N'-vinylethyleneureas

New chlorocarbonic esters of the formula ##STR1## new polycyclic carbonic esters of the formula ##STR2## and new copolymers obtainable by copolymerization of the new polycyclic carbonic esters of the formula (III) with monocyclic carbonates.

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Krefeld, Germany

Peter Mues