摘要:
The present invention relates to the preparation of trimethylcyclododecatriene in a continuous or batchwise process by trimerizing isoprene in the presence of a catalyst system and of a solvent. It is possible to isolate the resulting crude trimethylcyclododecatriene by means of distillation. The dimethylcyclooctadiene formed as a by-product may likewise be isolated from the crude product.
摘要:
The present invention relates to the preparation of trimethylcyclododecatriene in a continuous or batchwise process by trimerizing isoprene in the presence of a catalyst system and of a solvent. It is possible to isolate the resulting crude trimethylcyclododecatriene by means of distillation. The dimethylcyclooctadiene formed as a by-product may likewise be isolated from the crude product.
摘要:
The present invention relates to a process for the coammoximation, that is to say for the simultaneous ammoximation, of ketones, in particular of cyclic ketones such as cyclododecanone and cyclohexanone. Ammoximation is taken to mean here the preparation of oximes from ketones or aldehydes together with hydrogen peroxide and ammonia and in the presence of a catalyst which essentially consists of silicon, titanium and oxygen, for example titanium silicalite.
摘要:
The invention relates to a method for the coammoxidation, i.e. for the simultaneous ammoxidation of ketones, especially of cyclic ketones such as cyclododecanone and cyclohexanone. The ammoxidatian method of the invention relates to the production of oximes from ketones or aldehydes using hydrogen peroxide and amnmonia and further using a catalyst that substantially consists of silicon, titanium and oxygen, such as for example titanium silicalite.
摘要:
A process for producing amino-functional polysiloxanes by reacting the components A) identical or different terminally hydroxy-functional, linear or branched polysiloxanes, B) identical or different alkoxysilanes of the formula R1xR23-xSiR3 (I) where R1 is identical or different alkyl radicals having 1 to 4 carbon atoms, R2 is identical or different alkoxy radicals having 1 to 4 carbon atoms, R3 is an organic radical having at least one nitrogen atom, x=0 to 2, and C) water, in the presence of D) one or more phosphorus-containing, Brønsted-acidic compounds, to the correspondingly obtainable polysiloxanes containing nitrogen-containing groups, and to the use thereof are provided.
摘要:
The invention relates to microemulsions which comprise, as oil phase, a polysiloxane containing at least one quaternary ammonium group, methods for production thereof and also to the use of such microemulsions.
摘要:
The present invention relates to specific polyorganosiloxane block copolymers obtainable by radical polymerization, and to the use of the polyorganosiloxane block copolymers for the preparation of cosmetic or pharmaceutical compositions or body care compositions.
摘要:
The invention relates to water-soluble or water-dispersible, hydrophilic polyisocyanates and polyisocyanate mixtures, to a process for preparing them, and to their use as a starting component in the production of polyurethane polymers, more particularly as crosslinkers for water-soluble or water-dispersible film-forming binders, adhesives binders, or sealant binders or binder components with or without groups which are reactive towards isocyanate groups.