Dispersants, process for their preparation and their use
CA 1194501 A · Owner: Clariant Gmbh · Inventors: Weide, Joachim; Deubel, Reinhold; Diery, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula (1), in which Y denotes an aryloxy group which is possibly, substituted, R4 and R5 denote hydrogen or C1-C4-alkyl m denotes 0 to 12 and Z denotes polyalkylene glycol radicals having about 8 to about 200 ethylene glycol units -(CH2-CH2O)- or up to about 200 ethyleneglycol units and alkylene glycol units of the formula, in which R6 is methyl or ethyl and in which at least 8 ethylene glycol units are present. These compounds are prepared by initially reacting epoxide with a phenol or naphthol and subsequently oxalkylating. The reaction products are used as dispersants for the preparation of aqueous pigment dispersions.
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 October 1, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2002.
- 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.