Cycloolefin block copolymers and a process for their preparation

Details Cycloolefin block copolymers and a process for their preparation Cycloolefin block copolymers and a process for their preparation

1993-02-18

1994-07-19

Jagannathan, Vasu S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525297, 525210, 525216, C08F29708, C08L 5300

Patent

active

053310578

ABSTRACT:
Cycloolefin block copolymers, which in particular are suitable as phase promoters, are preferably obtained by copolymerization of polycyclic olefins, such as norbornene, with acyclic olefins, such as ethylene, by, at a molecular weight distribution M.sub.w /M.sub.n of the polymer block forming of less than 2, changing the reaction conditions one or more times in such a way that the monomer/comonomer ratio changes by at least 10 % or a further polymerizable monomer is metered into the monomer or the monomers.

REFERENCES:
patent: 5087677 (1992-02-01), Brekner et al.
patent: 5204429 (1993-04-01), Kaminsky et al.
R. Seymour, Chapter 1, and A. Echte, Chapter 2, in Advances in Chemistry Series, 222: 3-64 (1989).

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