Other

Hongde Xu

Yang Li

Yurong Wang

Mingchu Gu

Dingyi Hong

Yongjun Lu

Jinzong Yang

Xingjun Lu

Zhanxia Lv

Yuchun Song

Li Ping Yang

Jian Ding

Mei Wang

Aili Xu

Zhanxia L&uuml;

The present invention relates to multiblock interpolymers having the following symmetric structures and processes for their preparation: Y-X-Y, wherein Y represents a block of a random copolymer of conjugated diene and monovinyl aromatic monomer; and X represents a block of butadiene homopolymer, a block of isoprene homopolymer, or a block of butadiene/isoprene copolymer, and processes for the preparation thereof. The present multiblock interpolymers have in the same molecule both a rubber block of random copolymer of conjugated diene and monovinyl aromatic monomer and a rubber block selected from blocks of butadiene homopolymer, isoprene homopolymer and butadiene/isoprene copolymers, and hence possess excellent properties of the both two kinds of rubbers, and can be used widely as integrated rubber materials with excellent property balance, the present processes can simply prepare the above integrated rubber material in situ in a single reactor.

Multiblock interpolymers and processes for the preparation thereof

The present invention relates to star-block interpolymers having the following structure (X-Y) -C, wherein X represents a random copolymer block derived from conjugated diene and monovinyl aromatic monomer; Y represents a polyconjugated diene block; C represents a residue derived from a multifunctional lithium based initiator; and n represents the functionality of the initiator and has a value of not less than 3; and preparation of the same. The star-block interpolymers according to the present invention have in the same molecule both a random copolymer block derived from conjugated diene and monovinyl aromatic monomer and a rubber block selected from the group consisting of a homopolymer block derived from conjugated diene, a tapered copolymer block derived from conjugated dienes, a random copolymer block derived from conjugated dienes and combinations thereof, and hence possess excellent properties of the both kinds of rubbers, and can be used widely as elastomeric materials.

Star-block interpolymers and preparation of the same

Butadiene/isoprene/monovinyl aromatic monomer heptablock copolymers and method for the preparation thereof

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Beijing, China

Hongde Xu