METHOD OF OBTAINING HYDRATED NITRILE RUBBER, POSSESSING LOW MOLECULAR WEIGHT Russian patent published in 2015 - IPC B01J31/22 C08C19/02 C08C19/08 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to method of obtaining hydrated nitrile rubber. Method includes reaction of nitrile rubber in presence of hydrogen, optionally at least one coolefin and in presence of at least one compound of general formula . Values of radicals are the following: M stands for ruthenium or osmium; Y stands for oxygen (O), sulphur (S), radical N-R¹ or radical P-R¹, where R¹ is such as determined below; X¹ and X² stand for similar or different ligands; R¹ stands for alkyl, cycloalkyl, alkenyl, alkinyl, aryl, alcoxy, alkenyloxy, alkinyloxy, aryloxy, alcoxycarbonyl, alkylamine, alkylthioyl, aryltioyl, alkylsulphonyl, CR¹³C(O)R¹⁴ or aplylsulphinyl radical, each of which can be optionally substituted with one or greater quantity of alkyl, halogenide, alcoxy, aryl or heteroaryl radicals; R¹³ stands for hydrogen or alkyl, cycloalkyl, alkenyl, alkinyl, aryl, alcoxy, alkenyloxy, alkinyloxy, aryloxy, alcoxycarbonyl, alkylamine, alkylthioyl, aryltioyl, alkylsulphonyl or alkylsulphinyl radical, each of which can be optionally substituted with one or greater quantity of alkyl, halogenide, alcoxy, aryl or heteroaryl radicals R¹⁴ stands for alkyl, cycloalkyl, alkenyl, alkinyl, aryl, alcoxy, alkenyloxy, alkinyloxy, aryloxy, alcoxycarbonyl, alkylamine, alkylthioyl, aryltioyl, alkylsulphonyl or alkylsulphonyl radical, each of which can be optionally substituted with one or greater quantity of alkyl, halogenide, alkoxy, aryl or heteroaryl radicals; R², R³, R⁴ and R⁵ are similar or different and each stands for hydrogen, organic or inorganic radicals; R⁶ stands for hydrogen or alkyl, alkenyl, alkinyl or arylradical and L stands for ligand. Nitrile rubber is simultaneously subjected to metathesis reaction and hydration reaction. Also claimed is application of compound of general formula (I) in method of obtaining hydrated nitrile rubber.

EFFECT: compound of general formula (I) makes it possible to obtain hydrated nitrile rubber, possessing lower molecular weights and more narrow molecular weight distributions.

14 cl, 2 ex, 3 tbl