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

1995-06-01

1997-07-08

Jagannathan, Vasu S.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525289, 525297, 526127, 526133, 526169, 5261692, C08F 452, C08F 4602, C08F 3200, C08F29708

Patent

active

056462204

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.

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patent: 5428098 (1995-06-01), Brekner
patent: 5444134 (1995-08-01), Matsumoto
Origin and Early Development of Rubber-Toughened Plastics, Raymond B. Seymour, Depart. of Polymer Science, U. of Southernn Mississippi, Hattiesburg, MD 39406-0076, pp. 1-64, 1989.

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