Patent ID: 9487613
Filing Date: 2016-11-08
CPC Classification: C08C,C08F,C08G,C08J

Claim Text:
1. A method of functionalizing a copolymer comprising repeating units derived from at least one C4-C8 isoolefin and repeating units derived from at least one C4-C16 conjugated diolefin, the method comprising: converting one or more C—C double bonds of the repeating units derived from the isoolefins into one or more allylic hydroxyl sites; and reacting the one or more allylic hydroxyl sites with an activating reagent having the formula: to convert one or more hydroxyl groups of the allylic hydroxyl sites into —OC(O)—R functional groups represented by: wherein R and R′ are each independently: wherein X is halogen, and R1 to R5 are each independently H, NO 2 , halogen, or C1-C6 alkyl.