A process for removing iron-residues, rhodium- and ruthenium-containing catalyst residues from optionally hydrogenated nitrile rubber
A nitrile rubber, ruthenium catalyst technology, applied in the field of removing iron residues, rhodium-containing and ruthenium-containing catalyst residues from optionally hydrogenated nitrile rubber, capable of solving the problem of catalyst removal, nitrile rubber solution is not an alternative, Cost and other issues
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example 1-3 and comparative example 4
[0160] A hydrogenated nitrile rubber containing 34% by weight of acrylonitrile, less than 0.9% of residual double bonds and a Mooney viscosity (ML 1+4 at 100°C) of 65 was used, produced by adding a Nitrile butadiene rubber (34% by weight acrylonitrile, 66% butadiene) in RhCl (PPh 3 ) 3 (Ph = phenyl) is prepared by subjecting it to hydrogenation in the presence of a catalyst.
[0161] A 6.0% by weight solution of this hydrogenated nitrile rubber in monochlorobenzene was used as a standard for the following examples, and the term "hydrogenated nitrile rubber", as used in the following examples, refers to this solution.
[0162] In Examples 1-3, 0.5 g of the specified resin (see Table 1) was added together with 180 g of the hydrogenated nitrile rubber solution in a 500 ml three-necked round bottom flask. Each reaction mixture was stirred at about 100°C under nitrogen for 66 hours. The resin was then removed from the mixture by filtration and the rubber recovered by evaporatin...
example 5
[0168] A hydrogenated nitrile rubber containing 34% by weight of acrylonitrile, having less than 0.9% residual double bonds and a Mooney viscosity (ML 1+4 at 100°C) of 40 was used by adding a Nitrile butadiene rubber (34% by weight acrylonitrile, 66% butadiene) undergoes a metathesis process using a ruthenium-containing catalyst of general formula (III) and additionally reacts in RhCl (PPh 3 ) 3 (Ph = phenyl) is prepared by subjecting it to a subsequent hydrogenation process in the presence of a catalyst.
[0169] A 6.0% by weight solution of this hydrogenated nitrile rubber in monochlorobenzene, which was subjected to a metathesis process before hydrogenation, and the term "hydrogenated nitrile rubber", as here As used herein, this solution is referred to.
[0170] In a 500 ml three-necked round bottom flask, 0.5 g of a specified resin (see Table 1) was added together with 180 g of the hydrogenated nitrile rubber solution. The reaction mixture was stirred at about 100°C un...
example 7
[0176] A hydrogenated nitrile rubber containing 34% by weight of acrylonitrile, having less than 0.9% residual double bonds and a Mooney viscosity (ML 1+4 at 100°C) of 65 was used by adding a Nitrile butadiene rubber (34% by weight acrylonitrile, 66% butadiene) in RhCl (PPh 3 ) 3 (Ph = phenyl) is prepared by subjecting it to hydrogenation in the presence of a catalyst.
[0177] A 6.0% (by weight) solution of this hydrogenated nitrile rubber in monochlorobenzene was used as the standard for the following examples. The term "hydrogenated nitrile rubber", as used in the following examples, refers to this solution.
[0178] In a 500 ml three-necked round bottom flask, 0.5 g of a specified resin (as shown in Table 1) was added together with 180 g of the hydrogenated nitrile rubber solution. The reaction mixture was stirred at approximately 100° C. under nitrogen for various time intervals (see Table 4). The resin was then removed from the mixture by filtration and the hydrogenate...
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