摘要:
Silicone-polyether block copolymers prepared by organomodification of branched polysiloxanes having terminal and/or lateral SiH functions or linear polysiloxanes having lateral and/or terminal SiH functions by means of polyethers or polyether mixtures, characterized in that the polyethers used have a polydispersity Mw/Mn in the range from 1.0 to 1.5 and/or ratios Mn/MWIN and Mw/MWIN in the range from 0.7 to 1.3, their preparation and use and also polymer articles produced therewith.
摘要:
Alkoxysilyl-functional polyether-siloxanes and processes for preparing them by noble metal-catalysed SiC coupling of hydrogensiloxanes having SiH groups with unsaturated polyethers bearing alkoxysilyl groups or by alkoxylation of polyethersiloxanes or polysiloxanes by means of epoxy-functional alkoxysilanes in the presence of double metal cyanide catalysts.
摘要:
Alkoxysilyl-functional polyether-siloxanes and processes for preparing them by noble metal-catalysed SiC coupling of hydrogensiloxanes having SiH groups with unsaturated polyethers bearing alkoxysilyl groups or by alkoxylation of polyethersiloxanes or polysiloxanes by means of epoxy-functional alkoxysilanes in the presence of double metal cyanide catalysts.
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:
Use of one or more mixed curable hydroxyl-containing silyl polyethers as a constituent of compositions, as modifiers for surfaces, the silyl polyethers being prepared by DMC-catalysed alkoxylation of epoxy-functional alkoxysilanes.
摘要:
Use of one or more mixed curable hydroxyl-containing silyl polyethers as a constituent of compositions, as modifiers for surfaces, the silyl polyethers being prepared by DMC-catalysed alkoxylation of epoxy-functional alkoxysilanes.
摘要:
Silicone-polyether block copolymers prepared by organomodification of branched polysiloxanes having terminal and/or lateral SiH functions or linear polysiloxanes having lateral and/or terminal SiH functions by means of polyethers or polyether mixtures, characterized in that the polyethers used have a polydispersity Mw/Mn in the range from 1.0 to 1.5 and/or ratios Mn/MWIN and Mw/MWIN in the range from 0.7 to 1.3, their preparation and use and also polymer articles produced therewith.
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:
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.