Siloxane quaternary ammonium salt preparation
CA 1197257 A · Owner: Dow Corning Limited · Inventors: Westall, Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation of organosiloxane polymer wherein there are reacted together (A) a silanol-terminated polydiorganosiloxane in which at least 50% of the organic substituents are methyl, and (B) a quaternary ammonium silane RR'2Si-Q-N+X2YZ-, wherein R' represents an alkoxy or alkoxyalkoxy group R repre-, sents alkyl, phenyl, vinyl, or a group as defined for R' Q rep-, resents a divalent group, X represents alkyl aryl, aralkyl or, alkaryl, Y represents a monovalent hydrocarbon group or the group (-OM)aOD, wherein M represents an alkylene group having 2 or 3 carbon atoms, a has a value of from 1 to 20 and D represents H, alkyl or acyl, and Z is a halogen atom. The organosiloxane …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.