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 provides polysiloxane-polyether copolymers comprising at least one polyether moiety, characterized in that there is at least one polyether moiety capped with at least one —O—C(O)—O—R″ unit where R″ is identical or different alkyl moieties, a process for preparation thereof and use thereof, especially for polyurethane foam production.
摘要:
The present invention provides polysiloxane-polyether copolymers comprising at least one polyether moiety, characterized in that there is at least one polyether moiety capped with at least one —O—C(O)—O—R″ unit where R″ is identical or different alkyl moieties, a process for preparation thereof and use thereof, especially for polyurethane foam production.
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 invention provides a process for preparing branched SiH-functional siloxanes by converting a mixture of one or more low molecular weight SiH-functional siloxanes, one or more low molecular weight SiH-free siloxanes and one or more trialkoxysilanes with addition of water and in the presence of at least one Brønsted-acidic catalyst, which is characterized in that the reaction is performed in one process step.
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 relates to a method for producing siloxanes selectively carrying primary amino groups by reacting them with ammonia, and to compounds produced in this way.
摘要:
The invention relates to a process for producing equilibration products of organosiloxanes by rearrangement of the siloxane bond to a cation exchange resin, the organopolysiloxanes thus obtainable, and the use thereof.
摘要:
The invention provides a process for preparing branched SiH-functional siloxanes by converting a mixture of one or more low molecular weight SiH-functional siloxanes, one or more low molecular weight SiH-free siloxanes and one or more trialkoxysilanes with addition of water and in the presence of at least one Brønsted-acidic catalyst, which is characterized in that the reaction is performed in one process step.
摘要:
The invention relates to a process for producing equilibration products of organosiloxanes by rearrangement of the siloxane bond to a cation exchange resin, the organopolysiloxanes thus obtainable, and the use thereof.