Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1997-12-18
2000-06-27
Wu, David W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526170, 526171, 526172, 526256, 526257, 526258, 526259, 526266, 585507, 585509, 585518, 585520, 585526, 585527, 585643, 585648, 585653, 585502, C08F 200, C07C 202
Patent
active
060808268
ABSTRACT:
Functionalized cyclic olefins and methods for making the same are disclosed. Methods include template-directed ring-closing metathesis ("RCM") of functionalized acyclic dienes and template-directed depolymerization of functionalized polymers possessing regularly spaced sites of unsaturation. Although the template species may be any anion, cation, or dipolar compound, cationic species, especially alkali metals, are preferred. Functionalized polymers with regularly spaced sites of unsaturation and methods for making the same are also disclosed. One method for synthesizing these polymers is by ring-opening metathesis polymerization ("ROMP") of functionalized cyclic olefins. The metathesis catalysts for both RCM and ROMP reaction are ruthenium or osmium carbene complex catalysts of the formula ##STR1## where M is Os or Ru; R and R.sup.1 each may be hydrogen, C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkynyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.1 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.2 -C.sub.20 alkynyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbonyl, C.sub.1 -C.sub.20 alkylthio, C.sub.1 -C.sub.20 alkylsulfonyl or C.sub.1 -C.sub.20 alkylsulfinyl; X and X.sup.1 may be any anionic ligand; and L and L.sup.1 may be any neutral electron donor.
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Grubbs Robert H.
Marsella Michael J.
Maynard Heather D.
Bengtsson W. Patrick
California Institute of Technology
Rabago Roberto
Wu David W.
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