Branched thermoplastically-processible impact- resistant polyamides
CA 1231482 A · Owner: Rhein Chemie Rheinau Gmbh · Inventors: Fahnler, Friedrich; Weirauch, Kurt; Dhein, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyamide block copolymers obtained by activated anionic polymerisation of lactams having at least 5 ring members in the presence of basic catalysts, polyisocyanates as activators and amino-terminated polyethers, which are characterised in that the amino-terminated polyethers have a functionality of at least 3.0 preferably at least 3.2, a molar weight of greater than 3000 and the degree of amination is at least 60% and the polyisocyanates are aliphatic or cycloaliphatic polyisocyanates. These polyamide block copolymers show high impact resistance even at low temperatures.
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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 January 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2005.
- 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.