Polymerisation process
CA 1203339 A · Owner: Dulux Australia Limited · Inventors: Thompson, Morice W.; Parr, Rodney W.; Davies Stephen P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A monomer charge having a defined slight solubility in water, but giving rise to a polymer which is waterinsoluble, is emulsified in water in the presence of a nonionic surface-active compound which comprises in the molecule (a) a component of molecular weight at least 400 which is per se soluble in the aqueous phase, (b) another component of molecular weight 150-1000 which is per se soluble in the monomer phase and (c) an unsaturated grouping capable of copolymerising with the monomer(s) and being attached to or integral with the monomer-soluble component and the emulsified, monomer is then polymerised in the presence of a non-ionisable free radical azo initiator which is soluble in water …
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 April 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 2003.
- 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.