	US 12,252,563 B2
	Isobutylene-containing compositions and articles made thereof
Sunny Jacob, Seabrook, TX (US); Sujith Nair, League City, TX (US); and Yuan-Ju Chen, Houston, TX (US)
Assigned to ExxonMobil Engineering & Technology Company, Baytown, TX (US)
Appl. No. 17/054,953
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
PCT Filed May 2, 2019, PCT No. PCT/US2019/030350 § 371(c)(1), (2) Date Nov. 12, 2020, PCT Pub. No. WO2019/221919, PCT Pub. Date Nov. 21, 2019.
Claims priority of provisional application 62/672,851, filed on May 17, 2018.
Prior Publication US 2021/0246242 A1, Aug. 12, 2021
Int. Cl. C08F 212/14 (2006.01); B60C 1/00 (2006.01); C08F 210/10 (2006.01); C08K 3/04 (2006.01); C08K 3/34 (2006.01)

CPC C08F 212/21 (2020.02) [B60C 1/0008 (2013.01); C08F 210/10 (2013.01); C08F 212/18 (2020.02); C08K 3/04 (2013.01); C08K 3/346 (2013.01)]

18 Claims

1. A composition comprising:

about 70 parts per hundred parts rubber (phr) to about 90 phr of a halobutyl rubber; and

about 10 phr to about 30 phr of an elastomer composition,

wherein the elastomer composition comprises:

a C₄to C₇isoolefin;

a non-halogenated alkylstyrene; and

a halogenated alkylstyrene,

wherein the non-halogenated alkylstyrene and the halogenated alkylstyrene cumulatively are present in the elastomer composition in the amount of about 3 wt % to about 15 wt % based on the elastomer composition; and

wherein the halogenated alkylstyrene is present at from 0.1 mol % to 2 mol % relative to the non-halogenated alkylstyrene;

wherein the sum of the phr of the halobutyl rubber and the phr of the elastomer composition is about 100.