METHOD OF PREPARING MONOMERIC BASIS OF ANAEROBIC SEALING COMPOSITION Russian patent published in 1995 - IPC

FIELD: organic chemistry, carboxylic acid esters. SUBSTANCE: synthesis is carried out by reaction of isophthalic acid dichloroanhydride with a mixture of ethylene glycol monomethacrylic ester and allyl alcohol in toluene medium in the presence of 15-23% alkali solution at their molar ratio 1: (0.8-1.9): (1.4-0.5): (5-5.6): (2.8-3.6). Process is carried out in the presence of 1-5 wt.-% catamine АБ at 15-20 C. The end product is obtained from the solution after addition of inhibitor polymerization p-methoxyphenol or phenothiazine and solvent distilling off. Obtained monomeric base retains liquid state at the storage for 1 year (not less) at 10 C and does not require additional treatment stage from inhibitor hydroquinone. EFFECT: enhanced stabilization of anaerobic sealing compositions. 2 tbl