摘要:
The invention relates to a process for the targeted reorganization of polydimethylsiloxanes over sulphonic acid-containing cation exchange resins which have water contents of 8 to 25% by weight, and polydimethylsiloxanes thus prepared and the use thereof.
摘要:
Novel silicone polyethers by alkoxylating polymerization of epoxide monomers with (poly)organosiloxanes starting from an α,ω-dihydroxysiloxane as starter by means of DMC catalysis and process for preparing them.
摘要:
Process for the preferential alkoxylation of silicone-polyether copolymers either alone or in compositions thereof containing, for example, excess polyether by use of double metal cyanide catalysts.
摘要:
Curable material comprising silylated polymers containing urethane groups, and use thereof in sealants, adhesives, binders and/or surface modifiers.
摘要:
Novel silicone polyether copolymers of inverse structure of the formula 1, characterized in that no unsaturated functional groups caused by side reactions or conversion products thereof are present in the copolymer, and a process for preparation thereof, in which a polyether modified terminally and/or laterally with alkoxysilyl groups is reacted with silanes and/or siloxanes which bear one or more hydrolysis-labile groups, in a hydrolysis and condensation reaction.
摘要:
The present invention relates to compositions containing polyether-siloxane copolymers which are based on branched SiH-functional siloxanes, where at least one of the polyether-siloxane copolymers has a radical —OR8 where R8=hydrogen or an alkyl radical having from 1 to 10 carbon atoms which is bound to a silicon atom, a process for producing polyurethane foam in which these compositions are used as foam stabilizers, polyurethane foams containing these compositions and the use of these polyurethane foams.
摘要:
The invention provides a process for preparing SiOC-bonded polyorganosiloxanes by reacting, by processes known per se, hydroxyl-containing compounds with a stoichiometric excess of polyorganosiloxanes which contain —Si(H) units and are of the general formula (I) in the presence of one or more element compounds of main group III and/or of transition group 3 as a catalyst, wherein the reaction, on completion of conversion of the compounds containing hydroxyl groups, is continued until no further ≡Si—H groups are detectable by gas volumetric means, and also the compounds prepared in this way and their use.
摘要:
Polyether alcohols having alkoxysilyl groups, the use thereof and a process for their preparation by means of DMC catalysis, characterized in that one or more epoxy-functional alkoxysilanes are added individually or in a mixture with further epoxide compounds and optionally further comonomers, either in block form or in random distribution, onto a chain starter of the formula (VII) R1—H(VII) having at least one reactive hydroxyl group, where R1 is a saturated or unsaturated, optionally branched radical, or a polyether radical of the alkoxy-, arylalkoxy or alkylarylalkoxy group type, in which the carbon chain may be interrupted by oxygen atoms or corresponds to a polyetheralkoxy radical or to a singularly or multiply fused phenolic group.
摘要:
The invention relates to a method of producing organically modified siloxanes and silanes by noble-metal-catalyzed reaction of siloxanes and/or silanes having at least one SiH group with a compound having one double bond, wherein the reaction is carried out in the presence of water.