METHOD OF PRODUCING ALKOXY(HYDROXY)(ETHYLACETOACETATE)ALUMINOXANE OLIGOMERS Russian patent published in 2024 - IPC C07F5/06 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing alkoxy(hydroxy)(ethylacetoacetate)aluminoxane oligomers for use as precursors of high-purity components (binders, coatings, powders, etc.) for producing ceramic composites of aluminium-oxide composition (γ-Al₂O₃, α-Al₂O₃ etc.) depending on ceramisation temperature. Disclosed is a method of producing alkoxy(hydroxy)(ethylacetoacetate)aluminoxane oligomers of general formula [Al(OR)_s(OR*)_x(OH)_zO_y]_k, where k=4–10; s+x+2y+z=3; R – C_nH_2n+1, n=2–4; R* – C(CH₃)=CHC(O)OC₂H₅, in the medium of a hydrocarbon solvent, consisting in the fact that the reaction is initially carried out in a medium of a hydrocarbon solvent at 20-30 °C of an organoaluminium compound: AlR₃, R₂AlOR or Al(OR)₃, where R=C₂H₅ or C₄H₉, with acetoacetic ether CH₃C(O)CH₂C(O)OC₂H₅ at molar ratio acetoacetic ether/Al = 0.4-0.5, and then the obtained complex of the organoaluminium compound is reacted with acetoacetic ether at temperature of 30-60 °C with ethyl alcohol in molar ratio Al:C₂H₅OH=1:1 with subsequent distillation of solvent first at atmospheric pressure, and then at reduced pressure and temperature up to 150 °C.

EFFECT: proposed method is simpler and more technologically advanced than previously developed methods.

2 cl, 6 dwg, 1 tbl, 3 ex