C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/403
C08F 2/22 (2006.01) C08F 14/18 (2006.01) C08F 214/18 (2006.01)
Patent
CA 2016392
TITLE PEROXIDE-CURABLE FLUOROELASTOMERS HAVING BROMINE AND IODINE CURESITES AND THE PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE Peroxide-curable fluoroelastomers are prepared in the presence of iodinated compounds, with iodine bonding to a substantial number of terminal positions on the fluoroelastomer, and comprising up to 3 weight percent of bromine-containing units selected from fluoroolefins and perfluoroalkyl perfluorovinyl ethers, and complementally at least 97 weight percent of either units of vinylidene fluoride, one or more fluoroolefins, and optionally perfluoroalkyl perfluorovinyl ethers, or units of tetrafluoroethylene, perfluoroalkyl perfluorovinyl ether, and ethylene. The resulting fluoroelastomers have improved processability, excellent strength and compression set properties, and are useful in the preparation of injection molded shaft seals gaskets and other molded parts. The fluoroelastomer is prepared by a continous emulsion polymerization process.
E. I. Du Pont de Nemours And Company
Sim & Mcburney
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