Block copolymer dispersion stabilizer and aqueous dispersion polymerization therewith
CA 1098248 A · Owner: The Goodyear Tire & Rubber Company · Inventors: Cremeans, George E.; Markle, Richard A.; Germon, Wesley M. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A block copolymer dispersion stabilizer for use in the aqueous dispersion polymerization of an ethylenically unsaturated monomer comprises at least two blocks linked by chemical valences. At least one of the blocks is hydrophilic (water soluble) and at least another of said blocks is hydrophobic (water insoluble). The hydrophobic block can contain a plurality of similar or dissimilar pendent groups having chemically reactive functionality. Examples of such groups are epoxy groups and ethylenically unsaturated bonds. An aqueous dispersion polymerization process utilizes water as the dispersion medium a free-, radical polymerization catalyst a block copolymer, dispersion stabilizer comprising …
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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 March 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 1998.
- 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
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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.