Patent US3758080A successfully refreshed from Google Patents.
Patent EP0245047A1 successfully refreshed from Google Patents.
EP0245047A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Curing of preceramic articles with gaseous thionyl chloride
Assignee: Celanese Corp
•
Filing: 1987-05-01
•
Granted: —
•
Expires: 2007-05-01
Abstract
Abstract A novel curing process for preceramic organosilicon polymers is disclosed which involves contact with a gaseous thionyl chloride.
Inventors
- 👤 Paul Foley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 22:24
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/571; C04B35/58; C04B35/584; C04B35/589; C08; C08L; C08L83/00; C08L83/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
54 words
A process for producing a ceramic material which comprises: (a) contacting a shaped article made from an organosilicon preceramic polymer with a gaseous thionyl chloride for a period of time sufficient to cure the same; and (b) thereafter pyrolyzing said shaped preceramic article by heating the same in an inert atmosphere at elevated temperatures.
Claim 2
Dependent Claim
54 words
A process for producing a ceramic material which comprises: (a) contacting a shaped article made from an organosilicon preceramic polymer with a gaseous thionyl chloride for a period of time sufficient to cure the same; and (b) thereafter pyrolyzing said shaped preceramic article by heating the same in an inert atmosphere at elevated temperatures.
Claim 3
Dependent Claim
12 words
The process of claim l wherein said shaped article is a fiber.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein said contacting said thionyl chloride is done immediately after the fiber is spun.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein said thionyl chloride is admixed with an inert gas.
References Cited (Backward Citations)
US4535007A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.