Wacker Chemie Ag

Consortium Fur Elektrochemische Industrie Gmbh

Basf Se Corporation

Volker Stanjek

Lars Zander

Wolfram Schindler

Andreas Bauer

Bernd-Josef Bachmeier

Bernd Pachaly

Richard Weidner

Torsten Gottschalk-Gaudig

Wolfgang Ziche

Juergen Pfeiffer

Felicitas Schauer

Uwe Scheim

Franz-Heinrich Kreuzer

Peter Ball

Frank Baumann

Christoph Briehn

Thomas Frey

Michael Stepp

Marko Prasse

Bernd Hoevel

Peter Schoeley

Dominik Jantke

Horst Leigeber

Daniel Schildbach

Hartmut Ackermann

Georg Loessel

Jens Cremer

Thomas Kornek

Alfred Popp

Angelika Roser

Oliver Schäfer

Norman H&auml;berle

Jürgen Pfeiffer

Wolfgang Wewers

Thomas Kammel

Elke Schwiebacher

Heribert Westermayer

Steffen Doerrich

Adolf Gurtner

Kurt Reitmajer

Peter Schöley

Silvia Jung-Rosseti

Silva Jung-Rosseti

Michael Wandinger

Udo Anders

Pedro Marani

Nicolas Imlinger

Georg Lössel

Theresa Dellermann

Steffen DÖRRICH

A process for preparing silane-terminated polymers (SP) of the formula (I),Y—[O—C(═O)—NH—(CR)—SiR(OR)]  (I),includes in a 1process step at least one polymer (OHP) of the formula (II),Y—[OH]  (II),being reacted with at least one isocyanate-functional silane (IS) of the formula (III),O═C═N—(CR)—SiR(OR)  (III),with the proviso that the isocyanate-functional silanes (IS) are used in an amount such that there are at least 1.05 isocyanate groups in the silanes (IS) to each hydroxyl group in the compounds (OHP). Subsequently, in a 2process step, the unreacted isocyanate groups of the silanes (IS) are reacted, in the reaction mixture obtained in the 1process step, with at least one alcohol (A) of the formula (IV),ROH  (IV)Subsequently, in a 3process step, the reaction mixture obtained in the 2process step is passed through an evaporation unit (VD).

Method for producing organyloxysilane-terminated polymers

Alkylsilicone resins containing at least 20 mol percent of siloxy units bearing a >Calkyl group and having from 5-20 weight percent of alkoxy groups may be prepared directly by hydrolysis of chlorosilanes, and are highly effective as bulk hydrophobing agents in the preparation of fibrocement.

Alkyl silicone resin as additive for hyrophobising fibre cement

Silane-terminated polymers of the formula (I)Y&#x2014;[Z&#x2014;C(&#x2550;O)&#x2014;NR&#x2014;(CR)&#x2014;SiR(OR)]&#x2003;&#x2003;(I),are produced by reacting at least one hydroxy-functional polymer (a), comprising at least one polyether, polyester and/or polyacrylate unit, with at least one compound having at least one isocyanate group, in the presence of at least one bismuth-containing catalyst (K), with the proviso that the reaction mixture comprises 50 to 250 ppm water at the start of the reaction.

Method for producing silane-terminated polymers

Curable alkoxysilyl-terminated polymers may be used for architectural coatings, particularly flat roofs, if specific HALS UV absorbants are included in the coating formulation.

Coating composition for sealing surfaces

Metal catalysts employed in the preparation of organyloxysilyl-functional, moisture curable polymers, are deactivated by cheating with specific chelating agents. Compositions containing the polymers exhibit improved storage stability.

Method for producing organyloxysilyl-terminated polymers

Crosslinkable compositions especially useful for coatings containing an alkoxysilyoxy-terminated polymer and a silicone resin.

Cross-linkable coating compositions based on organyl oxysilane-terminated polymers

The invention relates to cross-linkable compositions comprising

Cross-linkable masses based on organosilicon compounds

Moisture curing alkoxysilyl-functional polymer compositions containing a high phenyl-content silicone resin and carbon black exhibit high adhesion to substrates, high tensile strength, very high elongation, and high tear strength without becoming unduly hard.

Crosslinkable materials based on organyl oxysilane-terminated polymers

Isocyanate-functional silanes are prepared in high yield by pyrolysis of an O-carbamate prepared by reaction of a dialkylcarbonate with an aminoalkyl-functional silane in the presence of a basic catalyst, where the catalyst is neutralized by an acid which has a pKof all protolysis stages of not more than 4. The neutralized or partially neutralized catalyst need not be removed prior to pyrolysis. The isocyanato-functional silanes exhibit higher storage stability as compared to those prepared from O-carbamates where catalyst neutralization is effected by weak acids.

Production of isocyanate functional organosilanes

Multicomponent crosslinkable compositions based on organyloxysilane-terminated polymers free of toxicologically objectionable catalysts and isocyanates exhibiting good tensile shear strength are useful for adhesive bonding and sealing of substrates.

Multicomponent crosslinkable compositions based on organyloxysilane-terminated polymers

Moisture-curing adhesives simultaneously having high tensile strength and elongation are prepared by admixing a silane-terminated polyurethane or polyether polymer having a defined and limited molecular weight, finely divided silica, and an organosilicon compound containing basic nitrogen.

Compositions on the basis of organyloxysilane-terminated polymers

A composition containing an alkoxysilyl-functional polymer, a phenylsilicone resin, and a non-reactive plasticizer, when cured, exhibits very high elongation without loss of tensile strength. The compositions are particularly well suited for flexible adhesives.

Cross-linkable materials based on organyl-oxysilane-terminated polymers

The objectionable odor of one component condensation curable organopolysiloxane compositions is eliminated by replacing all or the most substantial part of water scavenger vinyltrimethoxysilane with a phenyltrialkoxysilane, without compromising storage or curing properties.

Cross-linkable masses based on organyloxysilane-terminated polymers

RTV-1 compositions, despite containing conventional alkoxysilyl-terminated polymers, exhibit rapid cure and excellent physical properties when they further contain silicone resins, and employ metal, amidine, or guanidine curing catalysts C1 and amine-containing cocatalysts C2 in specific mole ratios.

Cross-linkable masses based on organyl-oxysilane-terminated polymers

Moisture curable compositions having a low modulus and a high resilience are prepared by curing a composition containing a first polymer which predominately contains two moisture-curable silyl groups, and a second polymer which is terminated by an alkoxy group and contains but a single moisture-curable silyl group, or a hydroxyl group.

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Ampfing, Germany

Volker Stanjek