| 摘要 |
Oxiranes and oxetanes are polymerized using as catalyst a double metal cyanide complex (see Specification 1,063,526, Division C2) of general formula MaKc.(H2O)d.Re where K is M1(CN)b or M1[(CN)rXt]b; M is at least one metal selected from Zn (II), Fe (II), Fe (III), Co (II), Ni (II), Mo (III), Al (III), V (IV), V (V), Sr (II), W (IV), Mn (II) and Gr (III); M1 is at least one metal selected from Fe (II), Fe (III), Co (II), Co (III), Cr (II), Cr (III), Mn (II), Mn (III), V (IV) and V (V); where X is at least one ion selected from F-, Cl-, Br-, I-, OH-, NO, O2-, CO, H2O, NO2-, C2O42- SO42-, CNO-, CNS-, NCO- and NCS-; R is at least one compound selected from an alcohol, aldehyde, ketone, ester, ether, amide, nitrile and a sulphide, a, b, c and r are integers, r is greater than t, and t, d and e are integers or zero. The products have high molecular weights of up to 1 x 106 and are amorphous and rubbery. Many alkylene oxides, including diepoxides, complexing agents R, and complex cyanides are specified. A typical catalyst is zinc cyanoferrate, Zn3[Fe(CN)6]2 which may be used alone, or as a complex with e.g. dioxane, diethylene glycol diethyl ether, ethylene glycol dimethyl ether, di- and tri-ethylene glycol dimethyl ethers. Suitable catalyst concentrations are 0.001 to 10% by weight. The polymerization may be effected in an inert solvent or in an inert atmosphere. The polymers may be crosslinked by sulphur or sulphur-furnishing materials, organic peroxides or irradiation. Suitable additives are vulcanizing agents, fibrous and non-fibrous inorganic matter, fibrous organic matter, fire-retardant agents, plasticizers, antioxidants, lubricants, pigments and synthetic rubbers and resins; many examples of these are given. The examples describe the polymerization of (1)-(13) and (18) propylene oxide and alkylglycidyl ether both alone and together; (14) and (15) oxetane, (16) 1,2-butene oxide; (17) propylene oxide with, respectively, butadiene dioxide, vinylcylohexane dioxide and dipentene dioxide. Uses.-Making tyres, coatings, impregnants for fabrics, films, belts, elastic fibres, adhesives, hose, tubing, shoe heels, raincoats, laminates, upholstery, floor mats, tiles, carpet and rug backing, gaskets, moulded articles, golf balls, sponges, encapsulating compounds, plasticizers and extenders. Reference has been directed by the Comptroller to Specification 898,306. |
