Isocyanic compositions and use thereof in the preparation of expanded polyurethanes with improved fire behaviour
CA 2432054 A1 · Owner: Sam, Felix Okon · Inventors: Tolomei, Angelo; Sam, Felix Okon; Bertolin, Michele
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An isocyanic composition having an isocyanic functionality of between (15)% and (40)% and containing (5) to (75)% by weight of toluene diisocyanate optionally modified with a polyether polyol (0) to (30)% by weight of , diphenylmethane diisocyanate with a (4),(4)' to isomer content of greater than (40)% by weight, (10) to (70)% by weight of 2,4-toluene diisocyanate (10) to , (30)% by weight of MDI polymer of general formula (I): in which .PHI. represents a phenyl group and n is an integer greater than or equal to (1); and (5) to (30)% by weight of a phosphorus-based flame-retardant additive.
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 December 21, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2023.
- 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.