Processes for preparing epoxidized polymers
AssigneeLANXESS Corporation
InventorsPaul Nguyen, Gregory J. E. Davidson, Richard Samuel Steevensz
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Abstract
The present invention is directed to a process for preparing epoxidized polymers. The process comprises reacting an unsaturated polymer with hydrogen peroxide in the presence of a polymer support having a sulfonic acid group. The present invention is also directed to an epoxidized halogenated-polymer which comprises repeating units derived from at least one isoolefin monomer and repeating units derived from at least one diolefinic monomer, and one or more allylic halide groups and one or more oxirane functional groups in the polymer backbone.
Claims20
A process for epoxidizing 1,4 isoprene moieties of halobutyl rubber comprising unsaturated allylic halide moieties and unsaturated 1,4-isoprene moities, the process comprising reacting an unsaturated halobutyl rubber with hydrogen peroxide in the presence of a polymer support having a sulfonic acid group, to epoxidize only the unsaturated 1,4-isoprene moieties of the halobutyl rubber without affecting the allylic halide moieties of the halobutyl rubber to produce epoxidized halobutyl rubber comprising allylic halide groups and oxirane functional groups in the polymer backbone.
Dependencies are inferred from the claim text.