Method for preparing polyolefins containing a high percentage of exo-olefin chain ends
First Claim
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1. A method for preparing a polyolefin product containing exo-olefinic end groups on the polymer chain, comprising:
- (a) ionizing a polyolefin containing terminal tert-chloride chain ends on the polymer chain in the presence of a Lewis acid to form an ionized polyolefin; and
(b) reacting the ionized polyolefin with;
(i) one or more pyrroles of formula I;
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Abstract
The present invention is directed to a method for preparing polyolefins containing a high percentage of exo-olefin chain ends. The method involves ionizing a polyolefin containing tert-chloride chain ends and reacting the ionized polyolefin with one or more nitrogen-containing five-membered aromatic ring or one or more hindered secondary or tertiary amines, or mixtures thereof.
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Citations
37 Claims
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1. A method for preparing a polyolefin product containing exo-olefinic end groups on the polymer chain, comprising:
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(a) ionizing a polyolefin containing terminal tert-chloride chain ends on the polymer chain in the presence of a Lewis acid to form an ionized polyolefin; and (b) reacting the ionized polyolefin with; (i) one or more pyrroles of formula I; - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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- 2. The method of claim I, wherein the ionized polyolefin of step (b) is reacted with one or more pyrroles of formula I:
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34. A method for preparing a polyolefin product containing exo-olefinic end groups on the polymer chain, comprising:
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(a) ionizing a polyolefin containing terminal tert-chloride chain ends on the polymer chain in the presence of a Lewis acid to form an ionized polyolefin; and (b) reacting the ionized polyolefin with; (i) one or more pyrroles of formula I - View Dependent Claims (35, 36, 37)
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Specification