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US 2020/0317856 A1Published application
Method for producing temperature-stable polyalkenylenes
OwnerKévin Micoine, Velichka KOLEVA +2inventors
InventorsKévin Micoine, Velichka KOLEVA, Ralf MEIER, Pedro VAZQUEZ TORAN
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Abstract
The present invention relates to a process for producing cycloalkenamer-containing compositions. The polymerization of cycloalkenamer is stopped by addition of alkyl vinyl ethers. This is followed by a membrane filtration. This type of production affords polyalkenamers that are thermally stable at 180° C.
Claims21
1-14. (canceled)
A process for producing a polyalkenamer-containing composition, comprising the steps of:
- a) reacting at least one cycloalkene by ring-opening metathesis polymerization in at least one organic solvent to obtain a polyalkenamer-containing product mixture, wherein the polymerization is performed in the presence of at least one metal-containing catalyst and wherein the metal is selected from rhenium, ruthenium, osmium or mixtures thereof, wherein the cycloalkene is selected from the group consisting of cyclobutene, cyclopentene, cycloheptene, cyclooctene, cyclononene, cyclodecene, cyclododecene, cycloocta-1,5-diene, 1,5-dimethylcycloocta-1,5-diene, cyclodecadiene, norbornadiene, cyclododeca-1,5,9-triene, trimethylcyclododeca-1,5,9-triene, norbornene (bicyclo[2.2.1]hept-2-ene), 5-(3′-cyclohexenyl)-2-norbornene, 5-ethyl-2-norbornene, 5-vinyl-2-norbomene, 5-ethylidene-2-norbornene, dicyclopentadiene and mixtures thereof,
- b) adding at least one alkyl vinyl derivative selected from alkyl vinyl ether, alkyl vinyl sulfide or mixtures thereof after the polymerization and
- c) working up the product mixture to remove the catalyst to obtain the polyalkenamer-containing composition, wherein the workup is carried out by membrane filtration in at least one organic solvent.
Dependencies are inferred from the claim text.