Wacker Chemie Ag

Consortium Fur Elektrochemische Industrie Gmbh

Wacker-chemie Gmbh

Wolfram Schindler

Volker Stanjek

Bernd Pachaly

Uwe Scheim

Oliver Schäfer

Elke Schwiebacher

Andreas Bauer

Norman H&auml;berle

Wolfgang Ziche

Eckhard Hanelt

Peter Schoeley

Frank Baumann

Thomas Kammel

Thomas Frey

Frank Sandmeyer

Sabine Delica

Michael Kaiser

Achim Schroeder-Ebensperger

Peter Schöley

Martina Chatzinerantzis

Achim Schröder-Ebensperger

Crosslinkable compositions based on organopolysiloxanes containing organyloxy groups may have low viscosities and self-leveling properties, and contain

Crosslinkable compositions based on organopolysiloxanes having organyloxy groups

Crosslinkable compositions based on organopolysiloxanes containing organyloxy groups which have improved wetting behavior, and especially improved early stability, contain

Cross-linkable masses based on organopolysiloxanes comprising organyloxy groups

Moisture curable silicone adhesives used for sealing joints and for the bonding of substrates such as PVC, concrete, mineral substrates, metals, glass, ceramic, wood, or painted surfaces are prepared from crosslinkable compositions containing both hydrophilic and hydrophobic fumed silicas in a mass ratio of 1:10 to 10:1.

Crosslinkable compositions based on organyloxysilane-terminated polymers

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.

Crosslinkable compositions based on organosilicon compounds

Functional polymers having silyl end groups are prepared in a continuous process by polymer analogous reaction of a reactive polymer and inter-reactive silane. The polymer products are surprisingly uniform in properties and exhibit higher physicochemical properties as well.

Continuous polymer-analogous reaction of reactive silane monomers with functionalized polymers

Room temperature, moisture curable, transparent, and non-yellowing polymer blends contain at least one alkoxysilyl-terminated polymer bearing an end group-A-(CH)&#x2014;SiR&#x2014;(OR)where A is a divalent linker group, contain a silica filler of high surface area as the sole filler, and is catalyzed by a catalyst which is free or substantially free of amine groups.

Transparent polymer mixtures which contain alkoxysilane-terminated polymers

Isocyanate-free foamable mixtures suitable for filling construction voids and for other uses, comprise isocyanate-free, alkoxysilane-terminated prepolymers (A) which have a silane end group of the formula [1], where

Isocyanate-free expandable mixtures exhibiting a fast hardening rate

Condensation curable systems employ ordinarily highly reactive polymers bearing methylene-linked alkoxysilyl groups. By limiting the amounts of activating compounds during the preparation of such polymers, the reactivity is sharply decreased, yet can be increased by addition of suitable catalysts. As a result, the polymers may be easily processed, yet the moisture curing times may be adjusted readily.

Polymer compositions based on alkoxysilane-terminated polymers with adjustable cure rate

The present invention relates to a process for preparing organyloxysilyl-terminated polymers which have increased stability toward atmospheric moisture, by reacting hydroxy-terminated organic polymers with isocyanato-functional silanes in the presence of at least one catalyst selected from the group consisting of bismuth and zinc compounds, and to crosslinkable compositions comprising such polymers.

Preparation of organyloxysilyl-terminated polymers

One-component, moisture curing compositions which exhibit rapid curing, even with exceptionally low levels of catalyst or with no catalyst at all, can be formulated from alkoxysilane-terminated polymers having alkoxysilane groups bonded to an electronegative, free electron-pair-containing heteroatom via a methylene linking group. Polymer blends containing the alkoxysilane-terminated polymers exhibit rapid cure, even at room temperature, and allow the use of nitrogen containing components such as adhesion promoters.

Rapid-cure, one-component mixtures, which contain alkoxysilane-terminated polymers

Alkoxysilane-terminated polymers prepared by reacting an isocyanatoalkoxysilane, preferably an isocyanatodialkyalkoxysilane, with an isocyanate-reactive prepolymer, can provide chain extension even when a monoalkoxy-functional silane, while retaining suitable reactivity profiles. The products are useful in sealants, caulks, coatings, and moldings.

Cross-linkable polymer blends containing alkoxysilane-terminated polymers

Alkoxy-crosslinking one-component moisture curing compositions contain a polymer bearing (alkoxy)(methyl)silylalkyl-terminal groups, and specific silanes as described herein. The compositions exhibit improved shelf life and yet retain other desirable characteristics.

Alcoxy cross-linking, single-component, moisture-hardening materials

Crosslinkable RTV-1 compositions with enhanced physical properties include an alkoxy-functional polydiorganosiloxane having alkoxy-functional silyalkylene groups linked to a polydiorganosiloxane via ureaalkylene groups, prepared by reacting an &#x3b1;,&#x3c9;-dihydroxyorganopolysiloxane with a silazane and with a silane of formulaOCN&#x2014;X-SirR(OR), &#x2003;&#x2003;(6)where R, R, R, and Rare optionally substituted hydrocarbon groups.

RTV-1 silicone elastomer compositions which crosslink by means of alkoxy groups

Curable, silane-terminated polydiorganosiloxane-urethane copolymers exhibit the beneficial properties of isocyanate-terminated polysiloxane-urethane copolymers without the detriments associated with free isocyanate groups.

Silane-terminated polydiorganosiloxane urethane copolymer

The invention relates to moisture cross-linking compositions containing (A) 100 parts per weight of a silane-terminated polydiorganosiloxane-urea/urethane copolymer of general formula (1), and (B) between 0.1 and 20 parts per weight of silane of general formula (3): &#x3a9;-(CH)&#x2014;Si(R)(CH), in which R, X, A, Y, D, B, W, n, a, b, c, d, &#x3a9;, R, e and f are defined as per claim

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Wolfram Schindler