Branched block copolymers of a monovinyl-aromatic compound and a conjugated diene
CA 1087339 A · Owner: Basf Aktiengesellschaft · Inventors: Seiler, Erhard; Gerberding, Karl; Fahrbach, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Branched block copolymers of from 60 to 95 per cent by weight of a monovinyl-aromatic compound and from 40 to 5 per cent by weight of a conjugated diene. The branched block copolymers have a structure of the general formula, (A1-A2-B?A3)n-X-(A3?B-A2)m, where the A's are non-elastomeric polymer segments based on the monovinyl-aromatic compound, the B's are elastomeric polymer segments based on the conjugated diene, X is the radical of an at least trifunctional coupling agent and n and m are numbers. The branched block copolymers may be used for the manufacture of highly transparent impact-resitant shaped articles especially, packaging materials.
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 October 7, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 1997.
- 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.