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US 9,279,025 B2Granted
Neodymium-catalyzed polybutadienes
AssigneeLANXESS Deutschland GmbH
InventorsHeike Kloppenburg, Norbert Steinhauser
Life of this patent
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Abstract
The invention relates to a high-molecular-weight, linear, neodymium-catalyzed 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.
Claims13
High-molecular weight, linear polybutadienes comprising:
- polybutadienes obtained by neodymium-catalysed polymerization of butadiene monomers, wherein the polybutadienes have:
- >95% of cis-1,4 content;
- <1% of 1,2-vinyl content;
- a Mooney viscosity (ML1+4 100° C.) of 70 to 90;
- a molar mass distribution of Mw 90%<1,000,000 g/mol and Mw 10%>100,000 g/mol;
- and
- a molar-mass-distribution index [Mw (90%)/Mw (10%)] of less than 10.
4 more elements
High-molecular weight, linear polybutadienes comprising:
- >95% of cis-1,4 content;
- <1% of 1,2-vinyl content;
- a Mooney viscosity (ML1+4 100° C.) is 70 to 90;
- a molar mass distribution of Mw 90%<1,000,000 g/mol and Mw 10%>100,000 g/mol;
- a molar-mass-distribution index [Mw (90%)/Mw (10%)] of less than 10;
- and
- a branching index (solution viscosity/Mooney viscosity) of 5 to 7.
4 more elements
High-molecular weight, linear polybutadienes comprising:
- polybutadienes obtained by neodymium-catalysed polymerization of butadiene monomers, wherein the polybutadienes have:
- >95% of cis-1,4 content;
- <1% of 1,2-vinyl content;
- a Mooney viscosity (ML1+4 100° C.) of 70 to 90;
- a solution viscosity (RT, 5.43%, toluene) of 400 to 580 mPas;
- a branching index (solution viscosity/Mooney viscosity) of 5 to 7;
- a molar mass distribution of Mw 90%<1,000,000 g/mol and Mw 10%>100,000 g/mol;
- and
- a molar-mass-distribution index [Mw (90%)/Mw (10%)] of less than 10.
6 more elements
Dependencies are inferred from the claim text.