Wacker-chemie Gmbh

Wacker Chemie Ag

Jens-Peter Moldenhauer

Marlies Regiert

Sabine Hoffmann

Michael Messner

Thomas Wimmer

Siloxane copolymers producible by (a) reacting organopolysiloxanes (1) having a Si-bound hydrogen atom with linear oligomeric or polymeric compounds (2) of the general formula R-(A-CH2)-A-H (I), (b) reacting the resultant H-Agroup-bearing intermediates (4) with organic compounds (5) having at least two isocyanate groups in the presence of further organic compounds (6) and (7) which are reactive toward isocyanate groups, wherein the compounds (6) contain at least one tertiary amine group and the compounds (7) can be eliminated from the siloxane copolymer in a temperature range from 50&#xb0; C. to 250&#xb0; C., wherein free isocyanate groups are formed in the siloxane copolymer, and (c) partially or completely quaternizing the amine-containing intermediates (8) from step (b) with an alkylating agent (9).

Siloxane copolymers and methods for production thereof

Process for stabilizing and dispersing vegetable oils which contain

Complexes of .gamma.-cyclodextrin and retinol or retinol derivatives, along with processes for their preparation and compositions for their use. The complexes are useful in cosmetic formulations and in pharmaceutical formulations.

Complexes of gamma-cyclodextrin and retinol or retinol derivatives,

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Burghausen, Germany

Jens-Peter Moldenhauer