FIELD: chemistry.
SUBSTANCE: method of obtaining block-copolymers is realised by continuous polymerisation of butadiene-1,3 and styrene under action of anionic initiator in hydrocarbon solvent in cascade of reactors. Method is characterised by the fact that first polymerisation of butadiene-1,3 is realised, then, in second or following reactors of cascade reaction mass is subjected to interaction with styrene, with application as anionic initiator of n-butyllithium and modifying additive, representing mixture of calcium, sodium and potassium alcoholates, with hydrocarbon solvent containing from 1.0 to 10.0 wt % of toluene.
EFFECT: method of obtaining block-copolymer provides continuous compound polymerisation, multi-day run of polymerisation equipment and obtaining block-copolymer with high content of styrene units, which have block distribution.
1 tbl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING BLOCK COPOLYMERS | 2016 |
|
RU2634901C1 |
| METHOD FOR OBTAINING BLOCK COPOLYMERS | 2017 |
|
RU2659080C1 |
| METHOD OF PRODUCING BUTADIENE-STYRENE STATISTICAL POLYMERS | 2010 |
|
RU2434025C1 |
| METHOD FOR OBTAINING BUTADIENE POLYMERS AND BUTADIENE COPOLYMERS WITH STYRENE | 2007 |
|
RU2339651C9 |
| METHOD OF PRODUCING BUTADIENE POLYMERS AND COPOLYMERS OF BUTADIENE WITH STYRENE | 2008 |
|
RU2377258C2 |
| RANDOM COPOLYMERS OF VINYL AROMATIC COMPOUNDS AND CONJUGATED DIENES AND A METHOD FOR PRODUCTION THEREOF | 2016 |
|
RU2706012C1 |
| METHOD OF PRODUCING BUTADIENE POLYMERS AND COPOLYMERS OF BUTADIENE WITH STYRENE | 2016 |
|
RU2644775C2 |
| BUTADIENE POLYMERS' AND BUTADIENE/STYRENE COPOLYMERS' PRODUCTION PROCESS | 2003 |
|
RU2228339C1 |
| METHOD FOR OBTAINING BUTADIENE-STYRENE COPOLYMERS | 2018 |
|
RU2671556C1 |
| MIXTURES OF AMINOSILYL-FUNCTIONALIZED STYRENE, THEIR PRODUCTION, AND THEIR USE IN PRODUCTION OF ELASTOMERIC COPOLYMERS | 2019 |
|
RU2780620C2 |
