Method of preparing polyalkylene acrylates
CA 1065338 A · Owner: Celanese Corporation · Inventors: Fisher, Gene J.; Broussard, Jerry A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of Disclosure, Monomeric esters of polyalkylene glycols and .alpha..beta.-unsaturated carboxylic acids are prepared using a polyalkylene, glycol or mono-ether derivative of an alkylene glycol or polyalkylene glycol which has a tendency to form peroxides by heating, a mixture of the glycol or derivative a hydrocarbon solvent, and, a small amount of a dilute caustic or sodium borohydride for a time and to a temperature sufficient to decompose the peroxide and then reacting the glycol or derivative with an unsaturated acid such as acrylic acid or methacrylic acid in an inert atmosphere and in the presence of a suitable esterification catalyst and polymerization inhibitor. The crude reaction …
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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
- Granted October 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
- 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.