Neodymium-catalyzed polybutadienes
AssigneeLANXESS Deutschland GmbH
InventorsHeike Kloppenburg, Norbert Steinhauser
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Abstract
The invention relates to a high-molecular-weight, linear, neodymium-catalysed polybutadiene having a high proportion, >95%, of cis-1,4 units having a low proportion, <1%, of 1,2-vinyl content, and also having a small molar-mass-polydispersity index (MPI), characterized in that Mooney viscosity (ML1+4 100° C.) of the polybutadiene is from 70 to 90 and The molar-mass-polydispersity index of the polybutadiene is smaller than 10.
Claims11
High-molecular-weight, linear, neodymium-catalysed polybutadiene having a proportion, >95%, of cis-1,4 units and having a low proportion, <1%, of 1,2-vinyl content, and also having a small molar-mass-distribution index (MDI), characterized in that
- Mooney viscosity (ML 1+4 100° C.) of the polybutadiene is from 70 to 90 and
- the molar-mass-distribution index of the polybutadiene is smaller than 10 which is the quotient obtained by dividing Mw (90%) by Mw (10%), wherein its molar mass distribution is Mw 90%<1 000 000 g/mol and Mw 10%>100 000 g/mol.
Dependencies are inferred from the claim text.