Production of polyether polyols with reduced unsaturation
July 14, 2009. Estimated 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.Patent References 3393243 Barium oxide/cresylic acid catalyzed ethoxylation Ethoxylation with strontium bases Barium oxide catalyzed ethoxylation Process for preparing polyols Inorganic catalyst for alkoxylation of alcohols Strontium catalyzed alkoxylations Process for preparing nonionic surfactants-oxyalkylation with calcium and/or strontium catalysts Process for preparing nonionic surfactants-oxyalkylation with promoted barium catalysts Production of polyether polyols with reduced unsaturation Patent #: 5010187 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 etherExaminersPrimary: Kight, III, JohnAssistant: Sergent, Rabon Foreign Patent References
International ClassesC07C 043/10C07C 043/196 C07C 043/23 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. |
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