.beta.-keto esters as stabilisers for chlorinated polymers
CA 2031787 A1 · Owner: Wirth, Hermann O. · Inventors: Wehner, Wolfgang; Wirth, Hermann O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A-17873/+/CGM 340, .beta.-Keto esters as stabilisers for chlorinated polymers Abstract of the Disclosure, A composition comprising a) a chlorinated polymer, b) at last one Me(II) carboxylate and/or Me(II) phenolate and/or Me(II) alkylphenolate wherein Me(II) is Ba, Ca, Mg, Cd, Sr or Zn and, c) at least one compound of formula (I) (I), wherein n is 1, 2, 3, 4 or 6 and, when n = 1 R is phenyl and X is an alkyl group of 10 to 20 carbon atoms, when n = 2, R is alkyl of 1 to 4 carbon atoms or phenyl and X is alkylene of 4 to 12, carbon atoms alkylene of 2 to 12 carbon atoms which is substituted by at least one C1-C8alkyl group, or is -CH2-CH2-S-CH2-CH2-S-CH2-CH2- or -CH2-CH2-S-CH2-CH2when n = 3, …
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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 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2012.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.