Copolymers based on pentabromobenzyl acrylate and tetrabromoxylylene diacrylate or the corresponding methacrylates and their use as flameproofing agents
CA 1111196 A · Owner: Dynamit Nobel Aktiengesellschaft · Inventors: Klinkenberg, Herbert; Schmidt, Werner; Petersen, Egon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Copolymers based on unsaturated esters having the general formula:, (1), wherein the radicals X are the same or different and each represent bromine or chlorine, R is hydrogen or methyl and n is 0 or 1, and containing one or more units derived from comonomers selected from the group consisting of acrylic methacrylic, maleic and fumaric esters. These copolymers are suitable for use as flameproofing agents for thermoplasts.
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 October 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 1998.
- 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.