摘要:
Two or multi-component condensation curing compositions can be cured in deep sections with low shrinkage, yet require no tin catalysts, or a significantly reduced tin catalyst level.
摘要:
Two or multi-component condensation curing compositions can be cured in deep sections with low shrinkage, yet require no tin catalysts, or a significantly reduced tin catalyst level.
摘要:
Crosslinkable compositions based on organosilicon compounds with a very high storage stability contain fine-particle metacarbonate. Storage stability of the composition is increased as compared to conventional forms of carbonates.
摘要:
The present invention relates to a process for the continuous preparation of mixtures containing organosilicon compound (A) and solid (B) and optionally further components in a mixing unit comprising at least one rotating mixing shaft, wherein at least one mixing shaft makes an angle of inclination with the horizontal of more than 10 degrees and the inlet opening for the solid (B) is arranged higher than the outlet opening.
摘要:
Organosilicon compounds bearing silicon-bonded organyloxy groups are prepared by mixing and reacting silanol-functional organosilicon compounds with organosilicon compounds containing at least two organyloxy groups in a mixer with an energy input of at least 0.2 kW/Kg of mixture. At this level of energy input, reaction to form the organyloxy-functional product is rapid, and can be achieved without supplying external heat, and also without catalysts, if desired.
摘要:
Condensation crosslinkable compositions based on organosilicon compounds contain at least one heterocyclic compound A[CR12SiRa(OR2)3-a]x which contains at least one heteroatom from main groups 3 or 5 and is bonded to CR12 through one of these heteroatoms.
摘要:
Organosilicon compounds bearing silicon-bonded organyloxy groups are prepared by mixing and reacting silanol-functional organosilicon compounds with organosilicon compounds containing at least two organyloxy groups in a mixer with an energy input of at least 0.2 kW/Kg of mixture. At this level of energy input, reaction to form the organyloxy-functional product is rapid, and can be achieved without supplying external heat, and also without catalysts, if desired.
摘要:
Condensation crosslinkable compositions based on organosilicon compounds contain at least one heterocyclic compound A[CR12SiRa(OR2)3-a]x which contains at least one heteroatom from main groups 3 or 5 and is bonded to CR12 through one of these heteroatoms.
摘要:
The present invention relates to a process for the continuous preparation of mixtures containing organosilicon compound (A) and solid (B) and optionally further components in a mixing unit comprising at least one rotating mixing shaft, wherein at least one mixing shaft makes an angle of inclination with the horizontal of more than 10 degrees and the inlet opening for the solid (B) is arranged higher than the outlet opening.
摘要:
Aqueous dispersions of organopolysiloxanes are prepared by (a) reacting organopolysiloxanes having condensable groups with silanes: (R3O)3SiCR22—Y (II) or their hydrolyzates, where R2 is hydrogen or a monovalent C1-4 alkyl radical, R3 is a C1-8 alkyl radical, and Y is —CH2NHR4, —CH2NR42 or in the presence of water and emulsifier, (b) adding an aqueous silica dispersion, optionally mixed with a silane of the formula (II), (c) optionally adding an adhesion promoter, and (d) optionally adding of further materials which do not take part in reaction (a), with the proviso that no metal-containing catalysts are used and that the organopolysiloxanes and silanes are used in such amounts that the organopolysiloxanes form elastomeric films insoluble in toluene on removal of water.