Process for producing dispersions of pigments in condensation type polymers
CA 1050689 A · Owner: Hercules Incorporated · Inventors: Jones, Marlene J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A process for producing essentially agglomerate free intimate dispersions of at least 10 weight % of pigment in condensation type polymers is described. The process is carried out by forming a liquid dispersion of pigment particles having a size less than 3 microns in certain hydrocarbon diluents adding the, liquid dispersion to a melt of the polymer mixing the dispersion, and polymer under molten conditions until the pigment transfers from the diluent phase to the polymer phase removing the diluent, phase and recovering the pigment-polymer phase. - 1 -
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 March 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 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.