Tetrabromoxylylene diacrylates and substituted acrylates
CA 1080250 A · Owner: Dynamit Nobel Aktiengesellschaft · Inventors: Richtzenhain, Hermann; Petersen, Egon N.; Blumenfeld, Georg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tetrahaloxylylene diesters having the general formulae: (I), (II), wherein R represents hydrogen or a methyl group and X is bromine or chlorine, with the proviso that, when X is chlorine there is, no more than one chlorine atom per molecule are obtained by, converting acrylic acid or methacrylic acid in a polar solvent into an alkali salt thereof, and reacting m- or o- tetrabromoxylylene dichloride with a stoichiometric excess of from 1 to 10 mole % of the alkali salt obtained, in the presence of a polymerisation inhibitor at 50 to 150°C. These diesters are particularly useful as reactive crosslinkers for unsaturated compounds and fire-retarding additives to polymers.
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
- Granted June 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
- 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.