A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
POLYSILAN-POLYCARBOSILANE MIT REDUZIERTEM CHLORGEHALT AUF BASIS VON METHYLCHLORPOLYSILANEN SOWIE DARAUS HERGESTELLTE SPINNMASSEN UND KERAMISCHE FORMKÖRPER
The present invention pertains to a process for producing unmeltable polysilane-polycarbosilane copolymers which are soluble in inert solvents, comprising the steps providing the product of a disproportionation of a methylchlorodisilane or a mixture of several methylchlorodisilanes of the composition Si2MenCl6-n, wherein n=1-4, wherein the disproportionation was carried out with a Lewis base as a catalyst, wherein this product is a chlorine-containing, crude polysilane/oligosilane containing hydrocarbon groups, and thermally postcrosslinking the crude polysilane/oligosilane to a polysilane-polycarbosilane copolymer, characterized in that the chlorine content of the polysilane-polycarbosilane copolymer is lowered by reacting the crude polysilane/oligosilane with a substitution agent, by which chlorine bound therein is replaced with a chlorine-free substituent. Green fibers and low-oxygen/oxygen-free ceramic fibers with a very low chlorine content can be produced using this process.
POLYSILAN-POLYCARBOSILANE MIT REDUZIERTEM CHLORGEHALT AUF BASIS VON METHYLCHLORPOLYSILANEN SOWIE DARAUS HERGESTELLTE SPINNMASSEN UND KERAMISCHE FORMKÖRPER
The present invention pertains to a process for producing unmeltable polysilane-polycarbosilane copolymers which are soluble in inert solvents, comprising the steps providing the product of a disproportionation of a methylchlorodisilane or a mixture of several methylchlorodisilanes of the composition Si2MenCl6-n, wherein n=1-4, wherein the disproportionation was carried out with a Lewis base as a catalyst, wherein this product is a chlorine-containing, crude polysilane/oligosilane containing hydrocarbon groups, and thermally postcrosslinking the crude polysilane/oligosilane to a polysilane-polycarbosilane copolymer, characterized in that the chlorine content of the polysilane-polycarbosilane copolymer is lowered by reacting the crude polysilane/oligosilane with a substitution agent, by which chlorine bound therein is replaced with a chlorine-free substituent. Green fibers and low-oxygen/oxygen-free ceramic fibers with a very low chlorine content can be produced using this process.
POLYSILAN-POLYCARBOSILANE MIT REDUZIERTEM CHLORGEHALT AUF BASIS VON METHYLCHLORPOLYSILANEN SOWIE DARAUS HERGESTELLTE SPINNMASSEN UND KERAMISCHE FORMKÖRPER
POLYSILANE-POLYCARBOSILANES WITH REDUCED CHLORINE CONTENT BASED ON METHYLCHLOROPOLYSILANES, AND SPINNING DOPES AND CERAMIC MOLDINGS PRODUCED THEREFROM
POLYSILANE-POLYCARBOSILANE À TENEUR EN CHLORE RÉDUITE À BASE DE MÉTHYLCHLOROPOLYSILANES, ET MATIÈRES À FILER ET CORPS MOULÉS EN CÉRAMIQUE FABRIQUÉS EN CES COMPOSÉS
RUEDINGER ARNE (author) / CLADE JUERGEN (author) / SPANIOL HEIKO (author) / SPORN DIETER (author)
2017-04-26
Patent
Electronic Resource
German
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
/
D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
| European Patent Office | 2019
| European Patent Office | 2018
| European Patent Office | 2019
VERFAHREN ZUR HERSTELLUNG EINES KERAMISCHEN FORMKÖRPERS SOWIE KERAMISCHE FORMKÖRPER
| European Patent Office | 2016
Stahlbetonfertigteile und daraus hergestellte Tragwerke
| UB Braunschweig | 1955