C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/10, 261/41
C08G 77/54 (2006.01) C04B 35/14 (2006.01) C04B 35/589 (2006.01) C08G 77/62 (2006.01)
Patent
CA 2004399
HOE 88/F 340 ABSTRACT OF THE DISCLOSURE: Polymeric hydridochlorosilazanes, process for their preparation, ceramic materials containing silicon nitride which can be manufactured therefrom, and their manu- facture The invention relates to novel polymeric hydridochloro- silazanes, to their preparation, to their processing to form ceramic materials containing silicon nitride, and to said materials themselves. The polymeric hydridochloro- silazanes are prepared by reacting oligohydridoorgano- silazanes of the general formula (R1SiHNH)n, in which n is about 3 to about 12, with at least one of the chloro- silanes R2SiHCl2, R3SiCl3, Cl2R4Si-CH2CH2-SiR4Cl2 or Cl3Si-CH2CH2-SiR5Cl2 at 30°C to 300°C, where the radicals independently of one another have the following meanings: R1 = a C1-C6 alkyl or C2-C6 alkenyl group, R2 = a C2-C6 alkenyl group if R2SiHCl2 is reacted with the oligosilazanes by itself, or R2 = a C1-C6 alkyl or C2-C6 alkenyl group if R2SiHCl2 is reacted with the oligosilazanes as a mixture with other chlorosilanes, and R3, R4, R5 = a C1-C6 alkyl or C2-C6 alkenyl group, and where R3SiCl3 is used only as a mixture with at least one of the other chorosilanes (containing R2, R4 or R5). The polymeric hydridochlorosilazanes according to the invention can be converted into polysilazanes by reaction with ammonia, and these in turn can be pyrolyzed to form ceramic materials containing silicon nitride.
Bruck Martin
Gerdau Thomas
Kleiner Hans-Jerg
Peuckert Marcellus
Vaahs Tilo
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
LandOfFree
Polymeric hydridochlorosilazanes, process for their... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polymeric hydridochlorosilazanes, process for their..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymeric hydridochlorosilazanes, process for their... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1616561