Exxonmobil Chemical Patents Inc.

Bernard D'Cruz

Sunny Jacob

Michael Brendan Rodgers

Wai Keung Wong

Bharat Bhushan Sharma

Nitin Kamalakar Tambe

Kaushik Das

Sajith Pareparambil

Elastomeric polymers and compounded elastomers having reduced amounts of leachables and improved resistance to &#x3b3;-irradiation sterilization suitable for pharmaceutical stopper and seal applications. These polymers and compounded elastomers maintain their physical performances upon being exposed to &#x3b3;-irradiation over time and typical use conditions. The polymer is prepared by reacting a mixture of i) a Cto Cisoolefin monomer, ii) a styrene based monomer, and optionally iii) a Cto Cmultiolefin monomer wherein the polymer contains 5 to 15 wt % of styrene derived units.

Pharmaceutical elastomeric articles

Disclosed is an ethylene-propylene copolymer having isotactic polypropylene crystallinity compounded with a halobutyl rubber in an amount effective to improve one or more of aged tensile strength retention, fatigue resistance, and dimensional stability. Also disclosed is an elastomer composition wherein the copolymer can have at least 60 wt % propylene-derived units and at least 6 wt % ethylene-derived units, and a tire inner tube or tire innerliner composition comprising from 1 to 10 phr copolymer. Also disclosed is a vulcanizate of the elastomer composition, and articles, tire innerliners, tires, and tire inner tubes comprising the vulcanizate. Further disclosed are processes for making molded articles, tire inner tubes and tires.

Propylene copolymers in elastomeric compositions

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Karnataka, India

Bernard D'Cruz