Interference 103,482
substituted ring, etc.
On the other hand, Ewen, U.S. Patent 5,036,034, repeatedly
teaches that hemiisotactic olefin polymers are
“noncrystalline”. Ewen, U.S. Patent 5,036,034, states (col.
2, l. 18-22; emphasis added):
When R groups are on the same side of the principal
S
polymer
chain, the structure is isotactic. Since only every
other
one conforms to the isotactic structure, it is “hemi”.
The
material is a noncrystalline polymer.
Ewen expressly states, “Hemiisotactic polypropylene is
noncrystalline due to the disorder and irregularity of these
random groups” (Ewen, U.S. Patent 5,036,034, col. 4, l. 36-38;
emphasis added). “The noncrystalline hemiisotactic
polypropylene has use as a plasticizer for syndiotactic or
isotactic polypropylene” (Ewen, U.S. Patent 5,036,034, col. 6,
l. 4-6; emphasis added). “Hemiisotactic polypropylene is
noncrystalline and can be used as a plasticizer with
syndiotactic and isotactic polypropylene” (Ewen, U.S. Patent
5,036,034, col. 9, l. 30-32; emphasis added). Most generally,
Ewen states, ”Hemiisotactic polymer is noncrystalline and with
its partial stereoregular structure would have properties of a
plasticizer” (Ewen, U.S. Patent 5,036,034, col. 6, l. 17-19;
122
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