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US 6,639,013 B1Granted
Method of making graft, block-graft and star-shaped copolymers by in-situ coupling reaction
AssigneeThe Research Foundation of State University of New York
InventorsEli Ruckenstein, Hongmin Zhang
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Abstract
The present invention provides a method for the preparation of graft, block, and star-shaped copolymers. The method involves in situ coupling reaction between a living anionic backbone polymer possessing epoxy side chains and other living anionic polymers. The present method is simple, the coupling reaction is fast, pure copolymers are produced and the molecular weight, graft number and grafting position can be controlled to a greater extent than in existing methods.
Claims17
A method for preparing a copolymer comprising:
- providing a mixture of an epoxified first anionic living polymer in a first solution and at least a second anionic living polymer in a second solution;
- and
- reacting the mixture under conditions effective to form the copolymer wherein the first anionic living polymer is a backbone of the copolymer and the second anionic living polymer is a side chain of the backbone.
A method for preparing a copolymer comprising:
- providing a mixture of a first anionic living polymer having a bifunctional monomer with an epoxy group and being in a first solution, and a second anionic living polymer in a second solution;
- and
- reacting the mixture under conditions effective to form the copolymer wherein the first anionic living polymer is a backbone of the copolymer and the second anionic living polymer is a side chain of the backbone.
Dependencies are inferred from the claim text.