High green strength emulsion rubbers by the use of half esters of unsaturated dicarboxylic acids
CA 1210186 A · Owner: The Goodyear Tire & Rubber Company · Inventors: Jalics, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for improving the green strength of elastomers compris-, ing: copolymerizing a monomer or monomers with from about 1 to 10 parts by weight per 100 monomer of a dicarboxylic acid derivative said derivative being substantially hydrophobic; and compounding the copolymer with between 1 and 5 parts of a divalent metallic compound selected from the group consisting of zinc magnesium, and calcium; wherein said derivative is a half ester or half amide. As a result carboxylic copolymers can be produced in emulsion polymerizations having a basic (pH ? 7.0) aqueous medium. Heretofore, use of carboxylic acids in emulsion polymerizations have been limited to acidic mediums.
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 August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 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.