Process of preparing vesiculated polyester granules
CA 1212800 A · Owner: Dulux Australia Ltd. · Inventors: Beresford, Michael P.; Ritchie, Phillip J.A.; Potter, Susan W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process of preparing vesiculated polyester granules A process of preparing aqueous slurries of vesiculated granules of crosslinked polyester resin wherein the granules have a maximum shrinkage on drying of 5% of the granule diameter. The formation of aggregates of granules in the large scale production of granules using a metal oxide, hydroxide or weak acid salt as base can be overcome by using a surfactant which comprises a species, where a = 5-12, X is an anion of pK1 less than 2 and R is an alkylene oxide chain composed of units selected from ethylene, propylene and butylene oxides. When alkylene oxide other than ethylene oxide is present in the chain, such alkylene oxide must not …
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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 14, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 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.