Wacker Chemie Ag

Peter Schoeley

Uwe Scheim

Gabriele Dineiger

Herbert Soellradl

Guenther Dineiger

Stephan Schulz

Volker Stanjek

Wolfram Schindler

Marko Prasse

Otto Schneider

Detlev Ostendorf

Bernhard Ruhland

Silicone-containing cartridges having a plunger at one end thereof are effectively sealed against moisture penetration by introducing a silicone oil composition having a viscosity of from 5000 mPa&#xb7;s to 100,000 mPa&#xb7;s between the walls of the plunger and the interior surface of the cartridge wall.

Method for packaging silicone compounds

Curable RTV-1 organopolysiloxane compositions which maintain the properties and adhesive strength even in hot moist conditions include a bis-hydroxyl-functional organopolysiloxane, an organosilicon compound comprising an &#x3b1;-alkoxysilane bonded through a methylene group to a heteroatom of a heterocyclic compound, and a branched, non-resinous alkoxyfunctional organopolysiloxane containing at least 20 mol percent of RSiOmoieties where Ris a hydrocarbyl radical.

Crosslinkable compositions based on organosilicon compounds

Crosslinkable compositions based on organosilicon compounds, more particularly RTV-1 sealants, contain

Viscous compositions are metered discontinuously into storage vessels such as tubes, tubs, or cartridges, from a stable volume container free of dead space wherein the calculated volume, expressed as the mathematical product of adiabatic compressibility coefficients of the composition, the outlet pressure, and volume of the container exceed the metered volume.

Method for metering compounds based on organopolysiloxanes

The present invention relates to a process for the continuous preparation of mixtures containing organosilicon compound (A) and solid (B) and optionally further components in a mixing unit comprising at least one rotating mixing shaft, wherein at least one mixing shaft makes an angle of inclination with the horizontal of more than 10 degrees and the inlet opening for the solid (B) is arranged higher than the outlet opening.

Process for the continuous preparation of crosslinkable materials based on organosilicon compounds

Organosilicon compounds bearing silicon-bonded organyloxy groups are prepared by mixing and reacting silanol-functional organosilicon compounds with organosilicon compounds containing at least two organyloxy groups in a mixer with an energy input of at least 0.2 kW/Kg of mixture. At this level of energy input, reaction to form the organyloxy-functional product is rapid, and can be achieved without supplying external heat, and also without catalysts, if desired.

Process for preparing organosilicon compounds containing organyloxy groups

Condensation crosslinkable compositions based on organosilicon compounds contain at least one heterocyclic compound A[CRSiR(OR)]which contains at least one heteroatom from main groups 3 or 5 and is bonded to CRthrough one of these heteroatoms.

Two or multi-component condensation curing compositions can be cured in deep sections with low shrinkage, yet require no tin catalysts, or a significantly reduced tin catalyst level.

Cross-linkable masses based on organosilicon compounds

Crosslinkable organosilicon compositions with controllable modulus can be prepared using organosilicon compounds composed of units of the formula(HO)RSiO&#x2003;&#x2003;(I),where

In a process for producing crosslinkable organopolysiloxane compositions, in particular organopolysiloxane compositions which can be crosslinked at room temperature, the organopolysiloxane compositions are stored in a storage unit before being packed in moisture-proof containers, the storage having a storage capacity of at least 15 minutes of production capacity of the mixture, the essentially dead-space-free storage unit continually having an internal pressure of more than 1200 hPa during filling.

Process for producing crosslinkable compositions based on organopolysiloxanes

Crosslinkable compositions based on organosilicon compounds with a very high storage stability contain fine-particle metacarbonate. Storage stability of the composition is increased as compared to conventional forms of carbonates.

Crosslinkable compositions based on organosilicon compounds contain at least one compound of the formulaH(OCHCH)(OCHCHCH)(OCHCH)OH&#x2003;&#x2003;(III)and/or a reaction product thereof with hydrolyzable organosilicon compound(s), wheren is 0 or an integer from 1 to 30,m is 0 or an integer from 1 to 30, andthe sum of n and m is greater than 5, andp is 1, 2, or 3. The compositions have superior application properties as compared to similar compositions without compound III.

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Diera-Zehren, Germany

Peter Schoeley