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US 5,247,026 AGranted
Randomly epoxidized small star polymers
AssigneeShell Oil Company
InventorsJames R. Erickson, Steven H. Dillman, Dale L. Handlin, Jr., Carl L. Willis, Robert J. Sutherland
Life of this patent
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Abstract
An epoxidized diene star polymer having greater than 4 arms and comprising from 0.05 to 5 Meq of di-, tri- and tetra-substituted olefinic epoxides and the molecular weights of the arms are from 1,500 to 15,000.
Claims20
An epoxidized diene star polymer having a random distribution of from 0.1 to 3 Meq of di-, tri- and tetrasubstituted olefinic epoxides per gram of polymer and greater than 4 arms wherein the arm molecular weight is from 1500 to 15,000.
An epoxidized conjugated diolefin star polymer of the formula
- D.sub.n --X--C.sub.r
- wherein D is (A--M.sub.p);
- and
- wherein A is a block comprising at least one diene and the molecular weight of A 1s from 1,500 to 15,000;
- and
- wherein the polymer contains a random distribution of from 0.1 to 3 Meq of di-, tri- and tetra-substituted olefinic epoxides per gram of polymer;
- and
- wherein C is a block or multiblock segment which has a molecular weight of 50 to 15,000 and comprises at least one diene or vinyl aromatic hydrocarbon or methacrylate or combinations thereof but is not identical to D;
- and
- wherein the A blocks may comprise up to 99% of a monoalkenyl aromatic hydrocarbon monomer;
- and
- wherein M is a miniblock of a monomer selected from the group consisting of vinyl aromatic hydrocarbons and dienes and has a molecular weight of 50 to 1000;
- and
- wherein X is a coupling agent or coupling monomers or initiator, n.gtoreq.2, r.gtoreq.0, n.gtoreq.r, n+r ranges from greater than 4 to 100 and p is 0 or 1.
11 more elements
Dependencies are inferred from the claim text.