Initiator systems for polymerization of 1,3-dienes or copolymers containing 1,3-dienes
CA 1287616 C · Owner: Hall, James E. · Inventors: Hall, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and a catalyst system is disclosed herein for preparation of medium to high vinyl (co)polymers containing a 1,2-microstructure of between 30 and about 90 percent. The catalyst system which is employed in the production of the (co)polymer is an oligomeric oxolanyl alkane modifier and anionic initiator selected from (1) Na(R)3Mg or (2) Na(R)3Mg and an organolithium compound or (3) K(R)3Mg and an organolithium compound.
Read the whole patent
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 August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
- 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.