Cycloolefin copolymers, a process for their preparation and the use thereof and catalysts

a technology of cycloolefin and copolymer, which is applied in the field of cycloolefin copolymer, a process for their preparation and the use thereof, and catalysts, can solve the problems of inability to prepare copolymers which contain, and the syndiospecificity of synthesized complexes is only sligh

Inactive Publication Date: 2012-03-20
TOPAS ADVANCED POLYMERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the authors did not succeed in preparing copolymers which contain racemically linked diads and also show signals from 34.5 to 40.5 ppm in the 13C-NMR spectrum.
However, the synthesized complexes show only slight syndiospecificity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples 1-51

[0075]All polymerization experiments were carried out in a 1.5 l steel autoclave by the method described below. The maximum permissible internal operating pressure was 25 bar. The thermostating was effected with a circulation pump by means of superheated steam and process water. A crossbeam stirrer driven in directly via a magnetic clutch served for thorough mixing. Polymerization was effected at 70° C. in toluene as a solvent. The stirring speed was 850 rpm.

[0076]The amount of metallocene required for the polymerization was calculated so that from 20 to 30 g of polymer were to be expected. For the preparation of the catalyst solution, as a rule about 10 mg of metallocene were accurately weighed in and dissolved in the same number of milliliters of methylaluminoxane (=MAO) (10% by weight of MAO in toluene). The required amount of catalyst solution was taken up with a syringe and made up to 5 ml with MAO solution. In the case of very weakly active catalyst systems, the metallocene wa...

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Abstract

Cycloolefin copolymers which are distinguished by the presence of racemic diads of repeating polycyclic units and additionally by racemic triads of repeating polycyclic units are described. These copolymers can be prepared by copolymerization of polycyclic olefins with linear olefins in the presence of metallocene catalysts which have no Cs symmetry in relation to the centroid-M-centroid plane. The novel copolymers can be used for the production of shaped articles, in particular of films.

Description

CLAIM FOR PRIORITY[0001]This application is based upon German Patent Application No. DE 10 2007 015 707.1, entitled “Cycloolefin-Copolymere, Verfahren zu ihrer Herstellung, deren Verwendung und Katalysatoren”, filed Apr. 2, 2007. The priority of German Patent Application No DE 10 2007 015 707.1 is hereby claimed and its disclosure incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to racemically linked cycloolefin copolymers having a particular microstructure, a process for the preparation of these copolymers, selected catalysts which can be used in this process and the use of the cycloolefins copolymers.BACKGROUND[0003]The macroscopic properties of cycloolefin copolymers depend on the microstructure of the polymer chain. The microstructure of the polymer chain is influenced by the type of catalyst used.[0004]In R. A. Wendt, G. Fink, Macromol. Chem. Phys. 2001, 202, 3490, the microstructure of ethene / norbornene copolymers which were prepared with the...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08F4/76
Inventor RUCHATZ, DIETERSCHAUWIENOLD, ANNE-MEIKEJÖRG, PETER
Owner TOPAS ADVANCED POLYMERS
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