Flame-resistant polycarbonates containing units deriving from halogenated pyrimidine compounds in their polymer chain
CA 2004306 A1 · Owner: Enichem Tecnoresine S.P.A. · Inventors: Petri, Alberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CASE 2956, "FLAME-RESISTANT POLYCARBONATES CONTAINING UNITS DERIVING FROM HALOGENATED PYRIMIDINE COMPOUNDS IN THEIR POLYMER CHAIN." ABSTRACT, Flame-resistant thermoplastic branched polycarbonates of high molecular weight are prepared from:, (1) a carbonate precursor; (2) at least one dihydroxyaromatic compound of formula: (I), where:, R is a single bond, or a substituted or non-substituted linear or branched C1-C5 alkylene radical, or a group chosen from O S, SO2, and CO;, X and Y, which may be the same or different are H or CH3;, m and n, which may be the same or different are whole numbers, from 1 to 4;, - 2 - (3) at last one halogenated pyrimidine compound of formula: II, where: R2, R3, …
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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
- Filed November 30, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2011.
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