Hydrocarbon resins and process for preparing same
CA 1066000 A · Owner: Mitsui Petrochemical Industries · Inventors: Iwase, Yoshiyuki; Morimoto, Teijiro; Hashimoto, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing a hydrocarbon resin which comprises copolymerizing (A) a hydrocarbon fraction boiling within the range of 130° to 300°C. obtained by cracking, reforming and/or refining petroleum with (B) dicylopentadiene in the presence of Friedel-Crafts catalyst in a proportion such that the resulting hydrocarbon resin contains, based on the total weight thereof 20 to 80% of a unit derived from the dicyclopentadiene (B). A hydrocarbon resin having a number average molecular weight of 300 to 2500, a softening point of 40 to 180°C. a bromine number of 5 to 100 g/100 g and, a Gardner color hue of 5 to 17, prepared by the above process. This hydrocarbon resin is useful as an adhesive …
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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 November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 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
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.