Process for the production of concentrated emulsion polymers
CA 1278644 C · Owner: Chemische Fabrick Stockhauser Gmbh · Inventors: Hubner, Wolfgang; Schroers, Otto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for the production of concentrated, water-soluble or water swellable emulsion polymers by the polymerisation of at least one water-soluble monomer in a water-in-oil dispersion by means of polymerisation initiators optionally in presence of bi- or multi-function vinyl- or allyl compounds in which a water-in-oil dispersion of the starting monomers is polymerized whilst being stirred so that the heat of polymerisation is eliminated by distillation removal of the water contained in the reaction mixture. The polymerisation temperature is preferably adjusted and controlled by means of the pressure in the system.
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 January 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2008.
- 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.