POLYPHENYLENE ETHER KETONE FORMAL OXIMATE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2015 - IPC C08G73/00 C08G65/40 C07C249/04 

FIELD: chemistry.

SUBSTANCE: described is a polyphenylene ether ketone formal oximate of formula (1) having reduced viscosity η_red=0.45-0.55 dl/g, molecular weight M_W≈45000-55000. Also described is a method of producing said polyphenylene ether ketone formal oximate, which includes carrying out a reaction in an aprotic dipolar solvent of dimethyl sulphoxide in two steps; the first step includes reacting a dianion of an aromatic dihydroxyl-containing compound with dichlorobenzophenone in molar ratio of 2:1; the second step includes obtaining a polymer by adding a dihalogen-derivative, wherein the dihydroxyl-containing compound used at the first step is 4.4'-diacetyldiphenyloxide diketoxime, the dihalogen-derivative used at the second step is methylene chloride; the ratio of components at the first step (mol) 4.4'-diacetyldiphenyloxide diketoxime:dichlorobenzophenone:KOH:K₂CO₃ = 1:0.5:2:0.15; concentration of 4.4'-diacetyldiphenyloxide diketoxime in dimethyl sulphoxide is equal to 1 mol/l, temperature is 165°C, the duration of the first step is equal to 1 hour; the ratio of components at the second step (mol) with respect to the initial diketoxime - 4.4'-diacetyldiphenyloxide diketoxime:methylene chloride:tetrabutylammonium bromide=1:5:0.1, temperature is 80°C, the duration of the second step is equal to 10 hours. [-O-N=C(CH₃)-Ph-O-Ph-C(CH₃)=N-O-Ph-CO-Ph-O-N=C(CH₃)-Ph-O-Oh-C(CH₃)=N-O-CH₂-]n (1).

EFFECT: obtaining polyphenylene ether ketone formal oximate with good chemical resistance to aggressive media.

2 cl, 3 ex