Particulate expandable styrene polymers having good processability
CA 1063300 A · Owner: Basf Aktiengesellschaft · Inventors: Nintz, Eckhard; Schick, Rupert; Stahnecker, Erhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Particulate expandable styrene polymers containing organic bromine compounds and, to improve processability from, 0.0001 to 1.0% by weight, based on the styrene polymer of an, amine which is soluble in styrene and free from hydroxyl groups. The organic bromine compounds are present in an amount of 0.05 to 3% by weight. The amine compound has the general formula NR1R2R3 in which R1 is an aliphatic or cycloaliphatic hydrocarbon radical of from 4 to 20 carbon atoms R2 is hydrogen or, an aliphatic or cycloaliphatic hydrocarbon radical of from 1 to 15 carbon atoms and R3 is hydrogen or an aliphatic or aromatic hydrocarbon of from 1 to 15 carbon atoms with the, proviso that R1 has from 6 to 20 …
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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 September 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
- 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
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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.