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US Patent 5114619 - Production of polyether polyols with reduced unsaturation
US Patent Issued on May 19, 1992
Estimated Patent Expiration Date:
July 14, 2009Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
July 14, 2009Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractThis invention is a process for the preparation of a polyol having an equivalent weight of 200 to 5000 by the reaction of a monoepoxy compound with an initiator containing an active hydrogen atom in the presence of a catalyst substance selected from the group consisting of barium, strontium and their oxides, hydroxides, hydrated hydroxides or monohydroxide salts, and mixtures thereof. The process comprises adding water during the reaction of the monoepoxy compound with the initiator. The quantity of water added is one percent or less by weight of the total weight of monoepoxy compound to be reacted with the initiator. | InventorApplicationNo. 381220 filed on 07/14/1989US Classes:252/182.27, Reactant contains ether linkage536/120, Ethers568/613, Acyclic568/618, Preparing from organic hydroxy containing compound (H of -OH may be replaced by a Group IA or IIA light metal)568/619, From polyhydroxy containing compound568/620And cyclic etherField of Search252/182.27, Reactant contains ether linkage536/120, Ethers568/613, Acyclic568/618, Preparing from organic hydroxy containing compound (H of -OH may be replaced by a Group IA or IIA light metal)568/619, From polyhydroxy containing compound568/620And cyclic etherExaminersPrimary: Kight, III, JohnAssistant: Sergent, Rabon US Patent References3393243, 4210764, Barium oxide/cresylic acid catalyzed ethoxylationIssued on: 07/01/1980 Inventor: Yang , et al.4223164, Ethoxylation with strontium bases Issued on: 09/16/1980 Inventor: Yang , et al.4239917, Barium oxide catalyzed ethoxylation Issued on: 12/16/1980 Inventor: Yang4282387, Process for preparing polyols Issued on: 08/04/1981 Inventor: Olstowski , et al.4302613, Inorganic catalyst for alkoxylation of alcohols Issued on: 11/24/1981 Inventor: Yang , et al.4306093, Strontium catalyzed alkoxylations Issued on: 12/15/1981 Inventor: Yang , et al.4453022, Process for preparing nonionic surfactants-oxyalkylation with calcium and/or strontium catalysts Issued on: 06/05/1984 Inventor: McCain , et al.4453023, Process for preparing nonionic surfactants-oxyalkylation with promoted barium catalysts Issued on: 06/05/1984 Inventor: McCain , et al.5010187Production of polyether polyols with reduced unsaturation Issued on: 04/23/1991 Inventor: Heuvelsland Foreign Patent References
International ClassesC07C 043/10C07C 043/196 C07C 043/23 |
