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US 4,745,170 AGranted
Polyurethane elastomers from EO/BO polyether polyols
AssigneeThe Dow Chemical Company
InventorsKimbley A. Bushman, Michael K. Laughner
Life of this patent
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Abstract
This invention is a polyurethane and/or polyurea elastomer prepared in the reaction of: (a) an organic polyisocyanate; (b) a chain extender and (c) a polyether having a molecular weight from about 500 to about 10,000, which polyether is a block copolymer of ethylene oxide and butylene oxide comprising an internal poly(EO) block bonded on each side to a poly(BO) block, wherein oxybutylene moieties comprise from about 10 to about 90 percent of the total weight of the polyether.
Claims16
A polyurethane and/or polyurea elastomer prepared in the reaction of:
- (a) an organic polyisocyanate;
- (b) a chain extender and
- (c) an isocyanate reactive polyether having a molecular weight from about 500 to about 10,000, which polyether is a block copolymer of ethylene oxide and butylene oxide comprising an internal poly(EO) block bonded on each side to a poly(BO) block, wherein said poly(BO) blocks comprise from about 10 to about 90 percent of the total weight of the polyether.
Dependencies are inferred from the claim text.