摘要 |
A polymer comprises a repeating unit of ethylene and vinyl alcohol, characterized by a linear backbone with substantial absence of branching on the backbone. The polymer has a steady state oxygen permeability coefficient substantially independent of the humidity. In addition, a polymer comprises a repeating unit of ethylene and vinyl acetate, characterized by a linear backbone with substantial absence of branching on the backbone and a plurality of acetate groups bonded to the backbone. Some polymers comprise vinyl alcohol or acetate groups that are separated by x-2, x-1 or x carbon atoms, and such groups are present in a ratio of 1:2:1, wherein x ranges integrally from 3 to 12. |
申请人 |
DOW GLOBAL TECHNOLOGIES INC.;WEAVER, JOHN, D.;HARRIS, WILLIAM, J.;HILL, STEPHEN, E.;CHEUNG, YUNWA, W. |
发明人 |
WEAVER, JOHN, D.;HARRIS, WILLIAM, J.;HILL, STEPHEN, E.;CHEUNG, YUNWA, W. |