Production of telechelic compounds by metathesis depolymerization
AssigneeDow Global Technologies LLC
InventorsDaniel J. Arriola, John R. Briggs, Francis J. Timmers, Nicole L. Wagner, Timothy T. Wenzel
Life of this patent
Estimating the term…
Abstract
Telechelic unsaturated polymers suitable for conversion to functionalized derivatives such as polyols are prepared by metathesis of an unsaturated copolymer formed by addition polymerization of ethylene, a diene or alkyne and, optionally, one or more C3.20 α-olefins.
Claims18
A process for preparing a product mixture comprising ethylenically unsaturated telechelic polymers, the steps of the process comprising contacting a metathesis catalyst under polymer metathesis conditions with a composition comprising the unsaturated copolymer formed by addition polymerization of ethylene, a conjugated diene or alkyne, and one or more C3-20 α-olefins, said metathesis being conducted in the presence of a cyclic olefin or polyolefin, an acyclic olefin, and/or a chain transfer agent, and recovering the resulting telechelic reaction product.
A process for preparing a product mixture comprising functionalized telechelic polymers, the steps of the process comprising:
- i) forming a mixture comprising ethylenically unsaturated telechelic polymers by contacting an unsaturated copolymer formed by addition polymerization of ethylene, a conjugated diene or alkyne, and optionally one or more C3-20 α-olefins, with a metathesis catalyst under polymer metathesis conditions in the presence of a cyclic olefin or polyolefin, an acyclic olefin, and/or a chain transfer agent, to form a polyunsaturated reaction product;
- ii) converting some or all of the ethylenic unsaturation in the polyunsaturated reaction product to one or more functional groups;
- and
- iii) recovering the resulting functionalized telechelic reaction product.
(canceled)
Dependencies are inferred from the claim text.