Bayer Aktiengesellschaft

Heraeus Kulzer Gmbh & Co. Kg

Voigt, Reiner

Schwabe, Peter

Schlak, Ottfried

Peter Schwabe

Reiner Voigt

Jens Winkel

Ottfried Schlak

Hanns P Muller

Otto-Christian Geyer

Kuno Wagner

Wolfgang Podszun

Lothar Puppe

Rainer A Guggenberger

Oswald Gasser

Hanns-Peter Muller

Heiko Herold

Frank Wingler

Christian Wegner

Peter R Muller

Robert Friebe

Werner Finger

Klaus-Dieter Nehren

Michael Freckmann

Martin Grunwald

Bernd W Leusner

Gottfried Knispel

Renate Heid

Reiner Voight

Karl-Wilhelm Theis

Dieter Kooke

A silicone composition curing at room temperature by condensation, which is suitable especially as a dental molding composition. The silicone composition consists of the a) base paste containing a filler and polyorganosiloxane having hydroxy groups, b) and the activator component containing in addition to crosslinking agent and catalyst also a polyaddition product with alkoxysilyl groups in the molecule. The base paste and activator component can be mixed uniformly together and can be offered with special advantage in double cartridges.

Silicone composition curing at room temperature and the use thereof

A catalyst/cross-linking agent composition, containing at least one

Catalyst/cross-linking agent compositions, a method for their

It has been found that silicone resins which contain alkoxy functional groups and harden rapidly in the presence of moisture allow suitable one-component formulations as provisional fixing materials. The hardening rate can be adjusted by addition of suitable activators.

Provisional luting materials

The present invention relates to investment compounds containing zeolites and to models and moulds made from these. The investment compounds according to the invention are used in metal casting, preferably in the preparation of precision castings.

Casting investment compounds

In the preparation of a dental appliance wherein an investment compound is mixed with a liquid and then cast, the improvement wherein the investment compound is a plaster- or phosphate-bound investment compound which is free of an anionic surface-active agent and containing an iso-paraffin of the formula ##STR1## in which n denotes 2, 3, 4 or 5.

Dental investment compounds in the form of a powder with improved flow

A method of making a dental impression which comprises applying to the structure of which an impression is to be made a special prepolymer. The prepolymer is composed of units of at least one macrodiol, at least one aliphatic polyisocyanate, and an unsaturated monoalcohol as chain terminator, wherein the average functionality of the prepolymer based on the unsaturated groups is &gt;2.

Photosetting impression materials

A process for the preparation of a dental impression comprising

Process for preparation of dental impressions

A hard, resistant material formed by mixing and curing

Plastics which cure in a series of steps having urethane, urea, siloxane

The present invention relates to optically clear polysiloxane-based compositions which are employed, in particular, for the production of contact optical articles such as contact lenses, scleral lenses and intraocular lenses.

Optically clear silicone compositions

In a dental composite containing a polymerizable (meth)acrylic compound, photoinitiator, accelerator, inorganic filler and conventional auxiliaries, the improvement wherein the composite by weight comprises about

Hybrid plastic filling material

In a silicone impression and duplicating composition which undergoes crosslinking at ambient temperature by an addition reaction, comprising (a) an organopolysiloxane possessing two or more vinyl groups in the molecule, (b) optionally an organopolysiloxane without reactive groups, (c) an organopolysiloxane possessing two or more Si-H groups in the molecule, (d) a catalyst, (e) a filler and, (f) optionally an auxiliary and/or colorant, the improvement wherein polysiloxane components (a)-(c) contain not more than about 1.5% by weight of volatile oligomers, whereby the dimensional stability of impressions is improved.

Dimensionally stable impression compositions

An addition or condensation cross-linking molding or lining compound based on silicones comprising

Silicone molding compounds

Colored silicone composition

In the making of an impression wherein an impression material comprising an alginate, a pulverulent material and a dust-reducing coating is mixed with water to form a paste, the paste is positioned about a mold member, and permitted to harden, the improvement wherein such coating comprises an iso-paraffin. There is reduced dusting.

Dust-free alginate impression materials

Impression material in the form of a powder, which, on mixing with water, provides a paste which cures to a solid consistency, the material in the form of a powder being made dust-free by additions of a coating agent, which material is characterized in that it contains paraffin as an additive.

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Leverkusen, Germany

Peter Schwabe