Novel polyether polycarbonate block copolymers and polyurethanes prepared therefrom
Patent 4634743 Issued on January 6, 1987. Estimated Expiration Date: 
May 6, 2005. 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.
May 6, 2005. 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 3072613 3133113 3248414 3313782 3379693 3689462 3896090 Multi-block coupled polyoxyalkylene copolymer surfactants Process for the preparation of aliphatic polycarbonates and polyurethanes therefrom Process for preparing polycarbonates InventorApplicationNo. 06/731176 filed on 05/06/1985US Classes:525/462, Solid polymer derived from O-C(=O)-O- or hal-C(=O)-containing reactant and polyhydroxy reactant525/394, Mixed with -O-C(=O)-O-, hal-C(=O)-O-, or hal-C(=O)-hal containing reactant or polymer derived therefrom525/403, Solid polymer is derived from 1,2-epoxy compound containing only one 1,2 epoxy group as sole reactant and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof525/409, Solid polymer derived only from 1,2-epoxy reactants containing only C, H, and O525/433, Mixed with O-C(=O)-O-, hal-C(=O)-, or hal-C(=O)-hal reactant or polymer derived therefrom525/439, Mixed with O-C(=O)-O-, hal-C(=O)-O-, or hal-C(=O)-hal containing reactant or polymer derived therefrom; or wherein solid polymer is derived from a hal-C(=O)-hal, O-C(=O)-O-, or hal-C(=O)-O-, a polycarboxylic acid or derivative and a polyhydroxy reactant525/535, Solid polymer derived from sulfur-containing reactant525/537, Solid polymer derived from alkali metal sulfide and halogenated aromatic reactant, e.g., polyarylene sulfide, etc.527/300, FROM CARBOHYDRATE OR DERIVATIVE AS A REACTANT527/400, FROM LIGNIN, TANNIN, OR DERIVATIVE REACTANT528/370FROM REACTANT HAVING A HALOGEN ATOM OR OXYGEN SINGLE BONDED TO A CARBONYL GROUP, E.G., HALO-C(=O)-, -O-C(=O)-O, ETC.ExaminersPrimary: Pertilla, Theodore E.International ClassesC08G 18/44 (20060101)C08G 64/18 (20060101) C08G 64/00 (20060101) C08G 18/00 (20060101) AbstractThe invention is a block copolymer useful in the preparation of polyurethanes. The polyether polycarbonate block copolymer comprises(a) the residue of a hydrocarbon or a hydrocarbyloxy hydrocarbon compound containing 3 or more functional groups with active hydrogens;(b) an alkylene polyether, polyamine, polyamide, polyaromatic carbonate, polyester, aromatic polyether, polyimide, polysulfide, polysulfone or polysaccharide block wherein such block is bonded to the residue of each active hydrogen-containing functional group; and(c) a polyether polycarbonate block which comprises ether and carbonate ether units arranged in random order, wherein the polyether polycarbonate blocks are bonded to the blocks defined in (b).Other References
Field of SearchMixed with O-C(=O)-O-, hal-C(=O)-, or hal-C(=O)-hal reactant or polymer derived therefromMixed with O-C(=O)-O-, hal-C(=O)-O-, or hal-C(=O)-hal containing reactant or polymer derived therefrom; or wherein solid polymer is derived from a hal-C(=O)-hal, O-C(=O)-O-, or hal-C(=O)-O-, a polycarboxylic acid or derivative and a polyhydroxy reactant Solid polymer derived from O-C(=O)-O- or hal-C(=O)-containing reactant and polyhydroxy reactant Mixed with nitrogen-containing reactant or polymer therefrom Solid polymer derived from sulfur-containing reactant Solid polymer derived only from 1,2-epoxy reactants containing only C, H, and O Mixed with -O-C(=O)-O-, hal-C(=O)-O-, or hal-C(=O)-hal containing reactant or polymer derived therefrom | |
