Blend of epdm and sbr using an epdm of different origin as a compatibilizer
CA 2461736 A1 · Owner: Cooper Technology Services, Llc. · Inventors: Graf, Hans-Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymer blend of an ethylene-.alpha.-olefin-diene rubber and a conjugated diene rubber suitable for use as a replacement for unblended EPDM rubber in automotive applications. The rubber blends of the present invention comprise a high molecular weight EPDM rubber, a conjugated diene rubber and a low , molecular weight, high ethylene content EPDM rubber that functions as a compatibilizer. The resultant blend exhibits physical properties including , tensile and tear strength, that are comparable to conventional EPDM rubbers while maintaining the excellent heat and weather resistance possessed by EPDM rubbers.
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
- Filed September 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2024.
- 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.