FIELD: chemistry.
SUBSTANCE: present invention relates to a method for metathesis of nitrile rubbers in the presence of a special catalyst for metathesis breakdown of nitrile rubber. The method for metathesis of nitrile rubbers is carried out in the presence of at least one catalyst of general formula
,
where M denotes ruthenium, Y denotes oxygen (O), X1 and X2 denote anionic ligands, R1 denotes a hydrogen atom, C1-C12-alkyl, C2-C12-alkenyl, C2-C12-alkynyl or aryl, R2, R3, R4, R5 are identical or different and each denotes a hydrogen atom, -NO2, C1-C12-alkyl, C1-C12-alkoxy, unsubstituted or substituted with a radical selected from a group consisting of C1-C6-alkyl and C1-C6-alkoxy, phenyl, R6 denotes C1-C12-alkyl, C3-C6-cycloalkyl, C7-C18-arylalkyl or aryl, R7 denotes a hydrogen atom, C1-C12-alkyl, C5-C6-cycloalkyl, aryl or C7-C18-arylalkyl, and L denotes a neutral ligand.
EFFECT: disclosed method enables to perform metathesis breakdown of nitrile rubber without gel formation, and also enables to achieve low molecular weight of broken down nitrile rubber with a comparable noble metal load.
12 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF OBTAINING HYDRATED NITRILE RUBBER, POSSESSING LOW MOLECULAR WEIGHT | 2010 |
|
RU2548681C9 |
| POLYETHYLENE AND CATALYST COMPOSITION FOR POLYETHYLENE SYNTHESIS | 2005 |
|
RU2387681C2 |
| METHOD OF REGULATING RELATIVE ACTIVITY OF VARIOUS ACTIVE CENTRES OF HYBRID CATALYSTS | 2006 |
|
RU2418808C2 |
| METHOD OF PRODUCING COMPLEXES OF RUTHENIUM AND INTERMEDIATE COMPOUNDS THEREOF AND USE THEREOF IN METATHESIS OF OLEFINS | 2016 |
|
RU2735724C1 |
| POLYETHYLENE AND CATALYST COMPOSITION FOR POLYETHYLENE SYNTHESIS | 2005 |
|
RU2386642C2 |
| POLYETHYLENE FOR INJECTION MOULDING | 2005 |
|
RU2395527C2 |
| SYNTHESIS OF 1,3-BUTADIENE | 2015 |
|
RU2700413C2 |
| OLEFIN BASED POLYMER WITH EXCELLENT PROCESSING ABILITY | 2015 |
|
RU2670752C9 |
| METHOD OF OBTAINING ELASTIC COPOLYMERS OF ETHYLENE AND ALPHA-OLEFINS | 2009 |
|
RU2512536C2 |
| HIGHLY ACTIVE METATHESIS CATALYSTS SELECTIVE FOR ROMP AND RCM REACTIONS | 2010 |
|
RU2546656C2 |
