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.
US9469753B2
申请人:——
公开号:US9469753B2
公开(公告)日:2016-10-18
[EN] INHIBITORS OF BETA AMYLOID PRODUCTION<br/>[FR] INHIBITEURS DE PRODUCTION DE BÊTA AMYLOÏDE
申请人:WYETH CORP
公开号:WO2009012205A1
公开(公告)日:2009-01-22
Novel sulfonamide compounds useful in the treatment of conditions related to the production of beta-amyloid are described, as are routes to their preparation. The sulfonamide compounds are of the following structure, wherein R4-R3 are defined herein. Also provided are pharmaceutical compositions containing these compounds and/or prodrugs of these compounds and a physiologically compatible carrier. These compounds are specifically useful for inhibiting beta amyloid production, and treating Alzheimer's Disease, amyloid angiopathy, cerebral amyloid angiopathy, systemic amyloidosis, hereditary cerebral hemorrhage with amyloidosis of the Dutch type, inclusion body myositis, mild cognitive impairment (MCI) and Down's syndrome.
[EN] ELASTOMERIC COMPOSITIONS HAVING IMPROVED PROPERTIES<br/>[FR] COMPOSITIONS ÉLASTOMÈRES AYANT DES PROPRIÉTÉS AMÉLIORÉES
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2010016981A1
公开(公告)日:2010-02-11
Elastomeric compositions comprising at least one C4 to C7 monoolefin elastomer, at least one polyalphaolefin, and optionally at least one hydrocarbon polymer additive are disclosed. The PAO comprises oligomers of one or more C2 to C20 alpha-olefins having a kinematic viscosity at 100°C of 3 to 3000 cSt and a Mw/Mn of less than 4. In one aspect, the elastomeric composition may have improved flex fatigue properties and have a fatigue life of 450,000 Kc or more as measured by ASTM D 412 die C. In another aspect, an elastomeric composition may have improved impermeability and have a permeation coefficient at 40°C of 160 cc*mm/(m2 -day) or less.