Mixtures of alkylated methylolated 4,5-dihydroxy-imidazolidin-2-ones
CA 2276391 A1 · Owner: Basf Aktiengesellschaft · Inventors: Reichert, Jurgen; Hois, Pia; Lippert, Ferdinand
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for preparing mixtures of mixed-alkylated methylolated 4,5-dihydroxy-imidazolidin-2-ones by reacting methylolated 4,5-dihydroxyimidazolidin-2-one (DMDHEU) with a monovalent C1-5-alcohol and a polyol selected in the group which comprises ethylene glycol diethylene glycol, 1,2- , and 1,3-propylene glycol 1,2-, 1,3- and 1,4-butylene glycol, glycerin and polyethylene glycols of formula HO(CH2CH2O)nH in which 3n20. The monovalent , C1-5-alcohol and the polyol are used in an amount of 0.1 to 2.0 molar equivalents each, with respect to DMDHEU and the reaction is carried out at , temperatures from 20 ~C to 70 ~C at a pH value from 1 to 2.5 the pH value , being set at 4 to …
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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 December 30, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.