Polyethers and method for making the same
Patent 3941849 Issued on March 2, 1976. Estimated Expiration Date: 
March 2, 1993. 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.
March 2, 1993. 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 2141443 2807651 3278458 3404109 InventorAssigneeApplicationNo. 468895 filed on 05/10/1974US Classes:528/92, Material contains a polyvalent metal atom525/507, Mixed with an 1,2-epoxy-containing chemical treating agent525/523, Solid polymer contains more than one 1,2-epoxy group or is derived from reactant containing at least one 1,2-epoxy group526/120, Material contains compound of non-transition heavy metal wherein non-transition heavy metal is not bonded to hydrogen or carbon526/273, 3-membered heterocyclic ring contains at least one oxygen atom528/102, Phenolic reactant contains a halogen atom directly bonded to a nuclear carbon atom of the aryl-oxygen group528/171, Sulfur reactant contains sulfur directly bonded to oxygen528/175, Reactant contains a (O=)S(=O)-halo group528/86, FROM PHENOL, PHENOL ETHER, OR INORGANIC PHENOLATE568/618, Preparing from organic hydroxy containing compound (H of -OH may be replaced by a Group IA or IIA light metal)568/620And cyclic etherExaminersPrimary: Thomas, James O. Jr.Assistant: Breitenstein, G. T. Attorney, Agent or FirmAbstractHydroxy terminated polyethers are obtained by reacting (1) epoxide and oxetane monomers with (2) a telogen at least partially soluble with the monomers, reactive with said monomers and being selected from the group consisting of phenols (3) in admixture therewith as catalysts certain double metal cyanide complexes which preferably had been treated with organic materials like alcohols, ethers, esters and so forth. A feature of the process of the present invention is the preparation of high molecular weight diols, triols, etc. without appreciable end group unsaturation, and the use of certain solvents with particular monomers and catalysts to also achieve these results.The products of the present process are useful as nonionic surface active agents, as lubricants and coolants, as textile sizes, as films for packaging and in the preparation of solid or flexible polyurethanes by reaction with polyisocyanates. |
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