公开(公告)号：US20250066645A1

公开(公告)日：2025-02-27

申请号：US18717510

申请日：2022-12-13

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Sunny Jacob ,  John A. CLARK ,  Tu N. PHAM

IPC: C09J125/16 ,  C09J125/18

Abstract: A process for preparing a cement composition comprising an isoolefin-alkylstyrene copolymer and substantially free of an alkylstyrene monomer is described herein. The process comprises reacting the isoolefin monomer with at least a portion of the alkylstyrene monomer in a diluent to form an isoolefin-alkylstyrene copolymer, replacing the diluent with a solvent, reacting a halogenic scavenger with the unreacted alkylstyrene monomer in an absence of a free radical initiator in order to form a halogenic alkylstyrene compound without altering the isoolefin-alkylstyrene copolymer, and removing the halogenic alkylstyrene compound from the slurry to form the cement composition substantially free of the alkylstyrene monomer. Also disclosed herein is a composition comprising an isoolefin-alkylstyrene copolymer and an alkylstyrene monomer comprising a concentration less than about 20 ppm.