Color-stable nitrile rubbers
AssigneeArlanxeo Deutschland GmbH
InventorsSven Brandau, Andreas Kaiser
Life of this patent
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Abstract
What are provided are colour-stable, low-salt nitrile rubbers and a process for production thereof under specific conditions for the coagulation and/or washing of the nitrile rubber. Additionally obtainable are the corresponding vulcanizable mixtures based on this nitrile rubber, a process for producing vulcanizates from these mixtures and the resultant vulcanizates having excellent processing properties.
Claims15
A nitrile rubber comprising repeat units of at least one α,β-unsaturated nitrile monomer and of at least one conjugated diene monomer, wherein the nitrile rubber has an aluminium index E according to the general formula (I) of 7 ppm/MU to not more than 35.0 ppm/MU, based on the nitrile rubber,
- E
- =
- [
- Aluminium
-
- ]
- Mooney
-
-
- viscosity
- (
- I
- )
- in which
- [aluminium] is the aluminium content of the nitrile rubber in ppm and
- Mooney viscosity is the value of the Mooney viscosity (ML 1+4 at 100° C.) of the nitrile rubber, reported in Mooney units (MU), and
- wherein the rubber is not hydrogenated.
Dependencies are inferred from the claim text.