Butadiene polymers having terminal functional groups
AssigneeShell Oil Company
InventorsDale L. Handlin, Jr., Daniel E. Goodwin, Carl L. Willis, David J. St. Clair, John D. Wilkey, Michael J. Modic, Craig A. Stevens
Life of this patent
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Abstract
Hydrogenated butadiene polymers having terminal functional groups have minimum viscosity at any molecular weight when the 1,2-addition is between 30% and 70%. Hydrogenated butadiene polymers having about two terminal hydroxyl groups per molecule have surprisingly lower viscosities at 30% to 70% 1,2-addition than similar polymers having either higher or lower amounts of 1,2-addition. The polymers are useful in making coatings, sealants, binders, and block copolymers with polyesters, polyamides, and polycarbonates.
Claims16
A polymer, consisting essentially of:
- polymerized 1,3-butadiene having a peak molecular weight between 500 and 20,000, 1,2-addition between 30% and 70%, and hydrogenation of at least 90% of the unsaturation;
- and
- one or more terminal functional groups per molecule.
A polymer, comprising:
- polymerized 1,3-butadiene having a peak molecular weight between 500 and 20000, hydrogenation of at least 90% of the unsaturation, and 1,2-addition between 30% and 70%;
- and
- about two terminal functional groups per molecule.
Dependencies are inferred from the claim text.