Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-04-05
2005-04-05
Nutter, Nathan M. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S211000, C525S216000, C525S232000, C525S235000, C525S240000, C525S241000, C524S515000, C524S525000
Reexamination Certificate
active
06875813
ABSTRACT:
The improved green strength, green elongation, and green relaxation properties of isobutylene-based elastomers at elevated temperatures along with improved aging and barrier properties are achieved by blending semi-compatible, semi-crystalline copolymers with the isobutylene elastomers. The semi-crystalline copolymers are typically copolymers of ethylene and an alpha-olefin having from 4 to 16 carbon atoms. The improved properties are maintained in subsequent rubber compounds containing said blends and are particularly useful in tire and pharmaceutical container applications.
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Mirabella et al, Determination of the crystallinity of polyethylene/∝olefin copolymers by thermal analysis, Aug. 15, 2002, Journal of Polymer Science Part B: Polymer Physics, vol. 40, Iss. 15, pp 1637-1643.
Duvdevani Ilan
Tsou Andy H.
Wang Hsien-Chang
Arechederra Leandro
ExxonMobil Chemical Patents Inc.
Faulkner Kevin M.
Nutter Nathan M.
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