WO2014187861A1 - Process to hydrogenate unsaturated bonds of a (co)polymer substrate using a titanium compound, composition of a titanium compound in a (co)polymer matrix and preparation thereof - Google Patents
Process to hydrogenate unsaturated bonds of a (co)polymer substrate using a titanium compound, composition of a titanium compound in a (co)polymer matrix and preparation thereof Download PDFInfo
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- WO2014187861A1 WO2014187861A1 PCT/EP2014/060444 EP2014060444W WO2014187861A1 WO 2014187861 A1 WO2014187861 A1 WO 2014187861A1 EP 2014060444 W EP2014060444 W EP 2014060444W WO 2014187861 A1 WO2014187861 A1 WO 2014187861A1
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- Prior art keywords
- titanium compound
- polymer
- composition
- titanium
- compound
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- 150000003609 titanium compounds Chemical class 0.000 title claims abstract description 91
- 229920001577 copolymer Polymers 0.000 title claims abstract description 80
- 239000000203 mixture Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000000758 substrate Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000011159 matrix material Substances 0.000 title description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 150000002902 organometallic compounds Chemical class 0.000 claims abstract description 8
- 230000003213 activating effect Effects 0.000 claims abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 18
- 229910052719 titanium Inorganic materials 0.000 claims description 15
- 150000001993 dienes Chemical class 0.000 claims description 11
- 239000010936 titanium Substances 0.000 claims description 10
- MKNXBRLZBFVUPV-UHFFFAOYSA-L cyclopenta-1,3-diene;dichlorotitanium Chemical compound Cl[Ti]Cl.C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 MKNXBRLZBFVUPV-UHFFFAOYSA-L 0.000 claims description 7
- 101100420681 Caenorhabditis elegans tir-1 gene Proteins 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 claims description 4
- 150000002899 organoaluminium compounds Chemical class 0.000 claims description 4
- 150000002900 organolithium compounds Chemical class 0.000 claims description 4
- 150000002901 organomagnesium compounds Chemical class 0.000 claims description 4
- YHNWUQFTJNJVNU-UHFFFAOYSA-N magnesium;butane;ethane Chemical compound [Mg+2].[CH2-]C.CCC[CH2-] YHNWUQFTJNJVNU-UHFFFAOYSA-N 0.000 claims description 3
- 125000000962 organic group Chemical group 0.000 claims description 3
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 claims description 2
- KJJBSBKRXUVBMX-UHFFFAOYSA-N magnesium;butane Chemical compound [Mg+2].CCC[CH2-].CCC[CH2-] KJJBSBKRXUVBMX-UHFFFAOYSA-N 0.000 claims description 2
- KXDANLFHGCWFRQ-UHFFFAOYSA-N magnesium;butane;octane Chemical compound [Mg+2].CCC[CH2-].CCCCCCC[CH2-] KXDANLFHGCWFRQ-UHFFFAOYSA-N 0.000 claims description 2
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 claims description 2
- MCULRUJILOGHCJ-UHFFFAOYSA-N triisobutylaluminium Chemical compound CC(C)C[Al](CC(C)C)CC(C)C MCULRUJILOGHCJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000011541 reaction mixture Substances 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 description 16
- 238000005984 hydrogenation reaction Methods 0.000 description 14
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 10
- 239000000725 suspension Substances 0.000 description 9
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- -1 polyol compounds Chemical class 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 125000001931 aliphatic group Chemical group 0.000 description 5
- 229920001400 block copolymer Polymers 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 4
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 description 4
- 239000012442 inert solvent Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- BXOUVIIITJXIKB-UHFFFAOYSA-N ethene;styrene Chemical group C=C.C=CC1=CC=CC=C1 BXOUVIIITJXIKB-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 239000002815 homogeneous catalyst Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 2
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methylcyclopentane Chemical compound CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 125000002524 organometallic group Chemical group 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 229920002587 poly(1,3-butadiene) polymer Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 229920006132 styrene block copolymer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical compound C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000005234 alkyl aluminium group Chemical group 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 159000000032 aromatic acids Chemical class 0.000 description 1
- XRERONKQLIQWGW-UHFFFAOYSA-N but-1-ene;styrene Chemical compound CCC=C.C=CC1=CC=CC=C1 XRERONKQLIQWGW-UHFFFAOYSA-N 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 150000007942 carboxylates Chemical group 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229920006301 statistical copolymer Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003738 xylenes Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/02—Hydrogenation
Definitions
- the present invention relates to a process to hydrogenate unsaturated bonds of a (co)polymer substrate in which compositions of a titanium compound in a (co)polymer matrix are added, to compositions of a titanium compound in a (co)polymer matrix suitable for use in such a process, and to their preparation.
- Polymers of conjugated dienes such as 1 ,3-butadiene and isoprene and the copolymers of these dienes with vinylaromatic monomers, e.g. with styrene are widely used in industry as elastomers.
- (co)polymers contain double bonds in their chains, which permit their vulcanization.
- Some block copolymers of conjugated dienes and vinylaromatic hydrocarbons are used without vulcanization as thermoplastic elastomers, as transparent impact-resistant resins, or as modifiers or compatibilizers of polystyrene and polyolefin resins.
- these (co)polymers have a low resistance to ageing and oxidation by atmospheric oxygen and by ozone, due to the presence of double bonds in their chains. Hence, the use of these (co)polymers in applications requiring exposure to the external environment is limited.
- the resistance to oxidation by oxygen and ozone and, in general, the resistance to ageing may be considerably improved by (partially) hydrogenating these (co)polymers to obtain total or partial saturation of the double bonds.
- Numerous processes have been proposed for the (partial) hydrogenation of (co)polymers which contain olefinic double bonds.
- One process to (partially) hydrogenate the double bonds is using homogeneous catalysts of the organometallic titanium type. Because of the high activity of these catalysts the consumption of catalyst per unit weight of hydrogenated (co)polymer will be very low, which is reflected in a reduced cost of catalyst.
- US 5,583,185 discloses a process of hydrogenation in solution of polymers of conjugated dienes in the presence of homogeneous catalysts that contain a titanium compound of the type Cp 2 TiR 2 .
- Titanium compounds are available as solid materials, but then they have the disadvantage that they give a significant dust formation and/or clump formation during handling. Because of the low solubility of a number of titanium compounds, in many applications the titanium compounds are converted to suspensions in a liquid medium, which suspensions can be dosed in the process in which the titanium compounds are used, such as a hydrogenation process. These suspensions suffer from several disadvantages. The most important disadvantage is that the solid titanium compound does not remain nicely distributed in the liquid medium but rapidly sinks to the bottom, which makes for a varied concentration of titanium compound over the suspension.
- the uneven distribution of the titanium compound in a suspension with a high amount of solids in the bottom part or the dosing of solid titanium compounds that have a tendency to clump in some instances leads to plugging in reaction systems when used in the final application.
- the titanium compounds are chemically modified so that they become soluble in a liquid medium.
- these chemical modifications increase the price of the titanium compounds considerably.
- the present invention now provides a new process to (partially) hydrogenate unsaturated bonds of a (co)polymer substrate comprising the use of compositions containing a titanium compound in a (co)polymer matrix not having the above drawbacks.
- the process of the invention is a process to (partially) hydrogenate unsaturated bonds of a (co)polymer substrate comprising adding a titanium compound to the (co)polymer substrate, activating the titanium compound by adding an organometallic compound, and reacting said substrate with hydrogen in the presence of the activated titanium compound, wherein the titanium compound is added to the reaction mixture as a titanium compound-containing composition containing between 5 and 95 wt% on the total weight of the composition of the titanium compound and between 5 and 95 wt% on the total weight of the composition of at least one (co)polymer, and wherein the titanium compound is distributed in the at least one (co)polymer.
- the titanium compound is added to the (co)polymer substrate or the reaction mixture, it can also pre-dosed (i.e. inherently meaning that the copolymer substrate is added to the titanium compound).
- the addition can moreover be done in several ways, such as addition in one step, dosing in multiple steps over a period of time, or by continuous dosing.
- the process involves using compositions preferably containing between 10 and 70 wt%, more preferably between 20 and 60 wt%, most preferably between 30 and 50 wt%, on the total weight of the composition of a titanium compound and preferably between 30 and 90 wt%, more preferably between 40 and 80 wt%, most preferably between 50 and 70 wt%, on the total weight of the composition of at least one (co)polymer, wherein the titanium compound is distributed in the at least one (co)polymer.
- the invention also provides some of the above titanium compound-containing compositions that can be suitably used in the process of the invention; namely compositions wherein the titanium compound is present in a quantity between 20 and 60 wt% on total composition and compositions wherein the titanium compound is a complex of the formula TiR1 R2R3R4 wherein at least one of the groups R1 to R4 is an anionic aromatic group that is directly linked to the titanium atom.
- the invention in addition provides a process to make the titanium compound- containing compositions as suitably used in the process of the invention, wherein in a first step the titanium compound is mixed with the (co)polymer, preferably at a temperature higher than the Tg of the (co)polymer, and in a subsequent step the mixture of the titanium compound and the (co)polymer is particulated.
- Tg is the glass transition temperature as measured by DSC (differential scanning calorimetry) wherein, typically, the sample is first cooled by 10°C/min and then heated with that same speed.
- US 6,417,286 discloses a sulfur rubber containing a titanium compound with organic alkoxylate groups.
- the titanium compound is said to be present in an amount of up to 10%. It is said that the titanium compound and the rubber can be mixed in an extruder.
- this document describes a vulcanization process and not a hydrogenation process.
- US 4,216,107 discloses the addition of an organic titanate to polyol compounds to reduce the viscosity of such polyol.
- Titanate means a titanium compound of the formula TiR1 R2R3R4 wherein each R group is linked to the titanium atom via an oxygen atom.
- the amount of titanate is 0.01 up to 20 wt% on polyol.
- US 6,376,603 discloses the addition of a titanium oxide in a high amount to a silicone rubber composition. In the Example the components are kneaded at elevated temperature but not particulated.
- the titanium oxide compound is used as a colorant of the silicone rubber and the document does not relate to a process of hydrogenating a (co)polymer composition.
- the titanium compound-containing compositions as used in the process of the invention were found to be less susceptible to dusting or clumping, which was found to be a huge benefit when they are applied in a process to (partially) hydrogenate a (co)polymer substrate.
- (partially) hydrogenating in one embodiment means (partially) hydrogenating unsaturated (double) bonds, preferably unsaturated carbon-carbon bonds, to convert them to saturated bonds.
- unsaturated (double) bonds preferably unsaturated carbon-carbon bonds
- the process to (partially) hydrogenate substrates involves activating the titanium compound in the composition of the invention by adding an organometallic compound, and reacting said substrate with hydrogen in the presence of the activated composition.
- the step wherein the titanium compound in the composition in the process of the present invention is activated can take place before, during or after the composition of the invention is contacted with the substrate and before, during or after the addition of hydrogen.
- the titanium compound-containing composition is (first) added to a liquid medium to give a suspension of the composition of the invention in the same liquid medium.
- the particles containing the composition of the invention can be nicely and homogeneously suspended in (the above) inert solvents. Also the particles of the composition of the invention have no tendency to dust or clump when added to a liquid medium or to the reaction mixture. Because of the presence of the (co)polymer they have a higher viscosity than plain titanium compounds in a liquid and therefore do not sink so easily to the bottom of the suspension. It was established that the so-formed suspensions could be dosed to the hydrogenation process covered by the present invention without the drawbacks of the state of the art.
- the amount of titanium compound in the compositions of the invention is between 20 and 60 wt%, even more preferably between 30 and 50 wt%, on total composition weight.
- the titanium compounds in the composition of the present invention in some embodiments are in the form of precursors for catalytically more active counterparts and in the process of the invention are activated by being reacted with organometallic compounds.
- organometallic compounds that can be used for increasing the activity and/or selectivity of the titanium compounds in the composition of the present invention - before or during the course of the reaction with a (co)polymer containing unsaturated groups - are organometallic compounds such as organolithium, organomagnesium or organoaluminium compounds.
- organolithium compounds examples include alkyl lithium compounds such as n-butyllithium, sec.-butyllithium, etc.; examples of the organomagnesium compounds are alkyl magnesium compounds such as dibutyl magnesium, butyloctyl magnesium, butylethyl magnesium, etc.; and examples of the organoaluminium compounds are alkyl aluminium compounds such as tri- isobutyl aluminium, triethyl aluminium, etc.
- the titanium compounds of the present invention are organometallic complexes of titanium of the formula Ti-R1 R2R3R4, wherein at least one, preferably two, of R1 to R4 is/are organic groups.
- the at least one or two organic groups can be alkoxylate, carboxylate, aliphatic or aromatic groups.
- the titanium copounds are not titanates, i.e. not all R groups R1 to R4; more preferably, none of these R groups contain oxygen atoms that links them to the titanium atom.
- at least one of R1 to R4 is an anionic aromatic group wherein the aromatic ring is directly linked to the titanium atom, such as a cyclopentadienyl, fluorenyl, indenyl group, and substituted derivatives thereof.
- two of the ligands R1 to R4 are cyclopentadienyl groups.
- titanium compounds useful within the invention include bis-(4- methoxyphenyl)-bis-(r
- the titanium compound in the composition of the present invention is a compound wherein one or two groups R1 to R4 are cyclopentadienyl groups and two or three groups are a halogenide, like fluoride, bromide, or chloride, preferably chloride (such compounds with two cyclopentadienyl groups are called titanocenes).
- the most preferred compound is titanocene dichloride (TDC):
- the (co)polymer in which the titanium compound is distributed in the composition of the present invention also referred to as the (co)polymer matrix, preferably is compatible with the (co)polymer (rubber) to be hydrogenated when the titanium compound-containing composition of the invention is applied in the production (hydrogenation) of a (co)polymer.
- the (co)polymer matrix is the same as the (co)polymer to be (partially) hydrogenated or is the polymer after being (partially) hydrogenated.
- the (co)polymer can be a (non- hydrogenated, partially or fully hydrogenated) polymer of several dienes, possibly containing one or more (co)monomers.
- Suitable dienes are butadiene, pentadiene, and isoprene.
- Suitable (co)monomers are olefins like ethylene, propylene, butene, acrylonitrile, and styrene.
- One suitable example of the (co)polymer is a block polymer of 1 ,3-butadiene and styrene.
- the (co)polymer may be chosen from the group of aliphatic and aromatic olefins, esters of unsaturated carboxylic acids with an aliphatic or aromatic alkyl alcohol or a phenol, vinyl esters of aliphatic or aromatic acids, organic imines.
- the (co)polymer in the matrix preferably has an average molecular weight of between approximately 500 and 1 ,000,000, and particularly is a copolymer of a conjugated diene such as 1 ,3-butadiene or isoprene with vinylaromatic compounds such as styrene or a-methylstyrene.
- These copolymers include the statistical copolymers, in which the comonomers are distributed at random along the polymer chain, the insertion copolymers, and the pure or gradual block copolymers.
- the block copolymers are especially interesting, since some of them are thermoplastic elastomers useful from the industrial point of view.
- Such block copolymers consist of a) at least one polymer block A formed by polymerization of an aromatic hydrocarbon with a vinylic substituent, such as styrene or a- methylstyrene, and b) at least one polymer block B formed by polymerization of conjugated dienes, such as 1 ,3-butadiene or isoprene.
- the polydiene blocks are converted into polyolefinic blocks in such a way that the copolymers behave like thermoplastic elastomers of great industrial value.
- Preferred block copolymers are styrene-ethylene/butene-styrene block copolymers, or styrene-ethylene/butadiene-styrene block copolymers.
- the compositions of the present invention can be made by any suitable method.
- the titanium compound and the (co)polymer for the matrix are mixed, preferably at a temperature higher than the Tg (glass transition temperature) of the ( copolymer to make the mixture homogeneous.
- the mixture is particulated, wherein particulating means any method to get particles, i.e. includes any method whereby the size of the material is decreased and is intended to include methods like breaking, crushing, pelletizing, or milling.
- a suitable method is extruding the (co)polymer containing the titanium compound in a kneader/mixer, operating above the Tg of the (co)polymer matrix, followed by a shaping operation.
- a kneader/mixer operating above the Tg of the (co)polymer matrix
- a shaping operation Most preferably, an extruder is used, followed by a chopper to make the extrudates.
- the (partial) hydrogenation reaction of the unsaturated (co)polymer in the presence of the titanium compound-containing composition may be carried out in solution in an inert solvent.
- inert solvent signifies an organic solvent that does not react with any of the reactants participating in the reaction.
- inert solvents whose use is recommended within the framework of the invention are aliphatic and cycloaliphatic hydrocarbons such as n-hexane, n-octane, isooctane, cyclohexane, methylcyclopentane, methylcyclohexane, ethers such as tetrahydrofuran, aromatic hydrocarbons such as toluene, xylenes, etc., which are not hydrogenated under the reaction conditions selected, and mixtures of these compounds.
- aliphatic and cycloaliphatic hydrocarbons such as n-hexane, n-octane, isooctane, cyclohexane, methylcyclopentane, methylcyclohexane, ethers such as tetrahydrofuran, aromatic hydrocarbons such as toluene, xylenes, etc., which are not hydrogenated under the reaction conditions selected, and mixtures of
- the amount of activated titanium compound-containing composition to be used in the hydrogenation is not critical and may vary within broad limits; it can be comprised between 0.001 and 10 millimoles of titanium compound per 100 g of substance to be (partially) hydrogenated, and preferably between 0.01 and 5 mmoles of titanium compound per 100 g of substance to be (partially) hydrogenated.
- reaction temperatures of between approximately 20 and 150°C, preferably between 50 and 100°C, and hydrogen pressures of between approximately 1 and 70 kg/cm 2 , preferably between 4 and 12 kg/cm 2 , can be used.
- the products of the (partial) hydrogenation may be readily separated from the solvent used by means of known processes such as distillation, precipitation, etc.
- the partially or completely hydrogenated polymers and copolymers may be separated from the solvent by various methods:
- TDC titanocene dichloride
- the autoclave is pressurized with 50 atm of hydrogen and brought to a temperature of 60°C by heating with a bath.
- the hydrogenation is carried out under these conditions for a duration of 120 minutes, with continuous feeding of hydrogen to keep the pressure value constant, which continuous feeding suggests the consumption of hydrogen gas and, hence, hydrogenation of the butadiene polymer.
- the pressure is released and the polymer isolated by precipitation in methanol.
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Abstract
The present invention relates to a process to (partially) hydrogenate unsaturated bonds of a (co)polymer substrate comprising adding a titanium compound to the (co)polymer substrate, activating the titanium compound by adding an organometallic compound, and reacting said substrate with hydrogen in the presence of the activated titanium compound, wherein the titanium compound is added to the reaction mixture as a titanium compound-containing composition containing between 5 and 95 wt% on the total weight of the composition of the titanium compound and between 5 and 95 wt% on the total weight of the composition of at least one (co)polymer, wherein the titanium compound is distributed in the at least one (co)polymer,and relates to titanium compound-containing compositions that can be suitably used in the above process and their preparation.
Description
Process to hydrogenate unsaturated bonds of a (co)polymer substrate using a titanium compound, composition of a titanium compound in a (co)polymer matrix and preparation thereof The present invention relates to a process to hydrogenate unsaturated bonds of a (co)polymer substrate in which compositions of a titanium compound in a (co)polymer matrix are added, to compositions of a titanium compound in a (co)polymer matrix suitable for use in such a process, and to their preparation. Polymers of conjugated dienes such as 1 ,3-butadiene and isoprene and the copolymers of these dienes with vinylaromatic monomers, e.g. with styrene, are widely used in industry as elastomers. These (co)polymers contain double bonds in their chains, which permit their vulcanization. Some block copolymers of conjugated dienes and vinylaromatic hydrocarbons are used without vulcanization as thermoplastic elastomers, as transparent impact-resistant resins, or as modifiers or compatibilizers of polystyrene and polyolefin resins. However, these (co)polymers have a low resistance to ageing and oxidation by atmospheric oxygen and by ozone, due to the presence of double bonds in their chains. Hence, the use of these (co)polymers in applications requiring exposure to the external environment is limited. The resistance to oxidation by oxygen and ozone and, in general, the resistance to ageing may be considerably improved by (partially) hydrogenating these (co)polymers to obtain total or partial saturation of the double bonds. Numerous processes have been proposed for the (partial) hydrogenation of (co)polymers which contain olefinic double bonds. One process to (partially) hydrogenate the double bonds is using homogeneous catalysts of the organometallic titanium type.
Because of the high activity of these catalysts the consumption of catalyst per unit weight of hydrogenated (co)polymer will be very low, which is reflected in a reduced cost of catalyst. On the other hand, at the low catalyst concentrations that are usually required in a process as that in accordance with the invention, it is not necessary to eliminate the catalyst residues from the (partially) hydrogenated (co)polymer, since they do not have an unfavourable influence on the properties of said (co)polymers. As indicated above, this fact is advantageous from the industrial point of view, particularly in the (partial) hydrogenation of polymers and copolymers of conjugated dienes, since it permits a substantial simplification of the process.
US 5,583,185 discloses a process of hydrogenation in solution of polymers of conjugated dienes in the presence of homogeneous catalysts that contain a titanium compound of the type Cp2TiR2. Titanium compounds are available as solid materials, but then they have the disadvantage that they give a significant dust formation and/or clump formation during handling. Because of the low solubility of a number of titanium compounds, in many applications the titanium compounds are converted to suspensions in a liquid medium, which suspensions can be dosed in the process in which the titanium compounds are used, such as a hydrogenation process. These suspensions suffer from several disadvantages. The most important disadvantage is that the solid titanium compound does not remain nicely distributed in the liquid medium but rapidly sinks to the bottom, which makes for a varied concentration of titanium compound over the suspension. Therefore, it is not possible to dose the titanium compound properly in the intended use, which often leads to overdosing. In addition, it is difficult to empty the containers holding the suspension, i.e. solid material may remain on the bottom of the containers. These phenomena lead to the use of higher amounts of titanium compounds than strictly necessary and so to
higher costs. Moreover, incorrect dosing of titanium compounds when used as catalysts in polymer production leads understandably to poorer polymer quality. In addition, it leads to lower yields per unit catalyst in polymer production. For example, incorrect dosing of the titanium compound can give rise to polymers that have an undesirable colour. In addition, the uneven distribution of the titanium compound in a suspension with a high amount of solids in the bottom part or the dosing of solid titanium compounds that have a tendency to clump in some instances leads to plugging in reaction systems when used in the final application. To prevent the above disadvantages in the field sometimes the titanium compounds are chemically modified so that they become soluble in a liquid medium. However, these chemical modifications increase the price of the titanium compounds considerably. The present invention now provides a new process to (partially) hydrogenate unsaturated bonds of a (co)polymer substrate comprising the use of compositions containing a titanium compound in a (co)polymer matrix not having the above drawbacks. The process of the invention is a process to (partially) hydrogenate unsaturated bonds of a (co)polymer substrate comprising adding a titanium compound to the (co)polymer substrate, activating the titanium compound by adding an organometallic compound, and reacting said substrate with hydrogen in the presence of the activated titanium compound, wherein the titanium compound is added to the reaction mixture as a titanium compound-containing composition containing between 5 and 95 wt% on the total weight of the composition of the titanium compound and between 5 and 95 wt% on the total weight of the
composition of at least one (co)polymer, and wherein the titanium compound is distributed in the at least one (co)polymer.
Though in the above it is said that the titanium compound is added to the (co)polymer substrate or the reaction mixture, it can also pre-dosed (i.e. inherently meaning that the copolymer substrate is added to the titanium compound). The addition can moreover be done in several ways, such as addition in one step, dosing in multiple steps over a period of time, or by continuous dosing. The process involves using compositions preferably containing between 10 and 70 wt%, more preferably between 20 and 60 wt%, most preferably between 30 and 50 wt%, on the total weight of the composition of a titanium compound and preferably between 30 and 90 wt%, more preferably between 40 and 80 wt%, most preferably between 50 and 70 wt%, on the total weight of the composition of at least one (co)polymer, wherein the titanium compound is distributed in the at least one (co)polymer.
The invention also provides some of the above titanium compound-containing compositions that can be suitably used in the process of the invention; namely compositions wherein the titanium compound is present in a quantity between 20 and 60 wt% on total composition and compositions wherein the titanium compound is a complex of the formula TiR1 R2R3R4 wherein at least one of the groups R1 to R4 is an anionic aromatic group that is directly linked to the titanium atom.
The invention in addition provides a process to make the titanium compound- containing compositions as suitably used in the process of the invention, wherein in a first step the titanium compound is mixed with the (co)polymer, preferably at a
temperature higher than the Tg of the (co)polymer, and in a subsequent step the mixture of the titanium compound and the (co)polymer is particulated.
Tg is the glass transition temperature as measured by DSC (differential scanning calorimetry) wherein, typically, the sample is first cooled by 10°C/min and then heated with that same speed.
It should be noted that US 6,417,286 discloses a sulfur rubber containing a titanium compound with organic alkoxylate groups. The titanium compound is said to be present in an amount of up to 10%. It is said that the titanium compound and the rubber can be mixed in an extruder. However, this document describes a vulcanization process and not a hydrogenation process.
US 4,216,107 discloses the addition of an organic titanate to polyol compounds to reduce the viscosity of such polyol. Titanate means a titanium compound of the formula TiR1 R2R3R4 wherein each R group is linked to the titanium atom via an oxygen atom. The amount of titanate is 0.01 up to 20 wt% on polyol. US 6,376,603 discloses the addition of a titanium oxide in a high amount to a silicone rubber composition. In the Example the components are kneaded at elevated temperature but not particulated. The titanium oxide compound is used as a colorant of the silicone rubber and the document does not relate to a process of hydrogenating a (co)polymer composition. The titanium compound-containing compositions as used in the process of the invention were found to be less susceptible to dusting or clumping, which was found to be a huge benefit when they are applied in a process to (partially) hydrogenate a (co)polymer substrate.
In this document (partially) hydrogenating in one embodiment means (partially) hydrogenating unsaturated (double) bonds, preferably unsaturated carbon-carbon bonds, to convert them to saturated bonds. In some documents such a process is also referred to as a selective hydrogenation process.
As indicated, the process to (partially) hydrogenate substrates involves activating the titanium compound in the composition of the invention by adding an organometallic compound, and reacting said substrate with hydrogen in the presence of the activated composition. The step wherein the titanium compound in the composition in the process of the present invention is activated, can take place before, during or after the composition of the invention is contacted with the substrate and before, during or after the addition of hydrogen.
In some embodiments the titanium compound-containing composition is (first) added to a liquid medium to give a suspension of the composition of the invention in the same liquid medium.
Another advantage of the present invention is that the particles containing the composition of the invention can be nicely and homogeneously suspended in (the above) inert solvents. Also the particles of the composition of the invention have no tendency to dust or clump when added to a liquid medium or to the reaction mixture. Because of the presence of the (co)polymer they have a higher viscosity than plain titanium compounds in a liquid and therefore do not sink so easily to the bottom of the suspension. It was established that the so-formed suspensions could be dosed to the hydrogenation process covered by the present invention without the drawbacks of the state of the art.
In a more preferred embodiment, the amount of titanium compound in the compositions of the invention is between 20 and 60 wt%, even more preferably between 30 and 50 wt%, on total composition weight. The titanium compounds in the composition of the present invention in some embodiments are in the form of precursors for catalytically more active counterparts and in the process of the invention are activated by being reacted with organometallic compounds. Examples of organometallic compounds that can be used for increasing the activity and/or selectivity of the titanium compounds in the composition of the present invention - before or during the course of the reaction with a (co)polymer containing unsaturated groups - are organometallic compounds such as organolithium, organomagnesium or organoaluminium compounds. Examples of the aforementioned organolithium compounds are alkyl lithium compounds such as n-butyllithium, sec.-butyllithium, etc.; examples of the organomagnesium compounds are alkyl magnesium compounds such as dibutyl magnesium, butyloctyl magnesium, butylethyl magnesium, etc.; and examples of the organoaluminium compounds are alkyl aluminium compounds such as tri- isobutyl aluminium, triethyl aluminium, etc. The titanium compounds of the present invention are organometallic complexes of titanium of the formula Ti-R1 R2R3R4, wherein at least one, preferably two, of R1 to R4 is/are organic groups. The at least one or two organic groups can be alkoxylate, carboxylate, aliphatic or aromatic groups. Preferably, the titanium copounds are not titanates, i.e. not all R groups R1 to R4; more preferably, none of these R groups contain oxygen atoms that links them to the titanium atom. In further preferred embodiments at least one of R1 to R4 is an anionic aromatic group wherein the aromatic ring is directly linked to the titanium atom, such as a cyclopentadienyl, fluorenyl, indenyl group, and substituted derivatives thereof.
Preferably, two of the ligands R1 to R4 are cyclopentadienyl groups. Examples of such titanium compounds useful within the invention include bis-(4- methoxyphenyl)-bis-(r|5-cyclopentadienyl) titanium, bis-(3-methoxyphenyl)-bis-(n5- cyclopentadienyl)titanium, bis-(4-ethoxyphenyl)-bis-(q5-cyclopentadienyl)titanium, bis-(3-ethoxyphenyl)-bis-(q5-cyclopentadienyl)titanium, and bis-
(diphenylphosphinomethylene)-bis-(q5-cyclopentadienyl)titanium.
Most preferably, the titanium compound in the composition of the present invention is a compound wherein one or two groups R1 to R4 are cyclopentadienyl groups and two or three groups are a halogenide, like fluoride, bromide, or chloride, preferably chloride (such compounds with two cyclopentadienyl groups are called titanocenes). The most preferred compound is titanocene dichloride (TDC):
The (co)polymer in which the titanium compound is distributed in the composition of the present invention, also referred to as the (co)polymer matrix, preferably is compatible with the (co)polymer (rubber) to be hydrogenated when the titanium compound-containing composition of the invention is applied in the production (hydrogenation) of a (co)polymer. In one much preferred embodiment, the (co)polymer matrix is the same as the (co)polymer to be (partially) hydrogenated or is the polymer after being (partially) hydrogenated. The (co)polymer can be a (non- hydrogenated, partially or fully hydrogenated) polymer of several dienes, possibly containing one or more (co)monomers. Suitable dienes are butadiene, pentadiene,
and isoprene. Suitable (co)monomers are olefins like ethylene, propylene, butene, acrylonitrile, and styrene. One suitable example of the (co)polymer is a block polymer of 1 ,3-butadiene and styrene. In other embodiments the (co)polymer may be chosen from the group of aliphatic and aromatic olefins, esters of unsaturated carboxylic acids with an aliphatic or aromatic alkyl alcohol or a phenol, vinyl esters of aliphatic or aromatic acids, organic imines.
The (co)polymer in the matrix preferably has an average molecular weight of between approximately 500 and 1 ,000,000, and particularly is a copolymer of a conjugated diene such as 1 ,3-butadiene or isoprene with vinylaromatic compounds such as styrene or a-methylstyrene. These copolymers include the statistical copolymers, in which the comonomers are distributed at random along the polymer chain, the insertion copolymers, and the pure or gradual block copolymers. The block copolymers are especially interesting, since some of them are thermoplastic elastomers useful from the industrial point of view. Such block copolymers consist of a) at least one polymer block A formed by polymerization of an aromatic hydrocarbon with a vinylic substituent, such as styrene or a- methylstyrene, and b) at least one polymer block B formed by polymerization of conjugated dienes, such as 1 ,3-butadiene or isoprene.
In the process to (partially) hydrogenate, the polydiene blocks are converted into polyolefinic blocks in such a way that the copolymers behave like thermoplastic elastomers of great industrial value.
Preferred block copolymers are styrene-ethylene/butene-styrene block copolymers, or styrene-ethylene/butadiene-styrene block copolymers.
As acknowledged by the skilled person, the compositions of the present invention can be made by any suitable method. In an embodiment, first, the titanium compound and the (co)polymer for the matrix are mixed, preferably at a temperature higher than the Tg (glass transition temperature) of the ( copolymer to make the mixture homogeneous. Next, the mixture is particulated, wherein particulating means any method to get particles, i.e. includes any method whereby the size of the material is decreased and is intended to include methods like breaking, crushing, pelletizing, or milling. A suitable method is extruding the (co)polymer containing the titanium compound in a kneader/mixer, operating above the Tg of the (co)polymer matrix, followed by a shaping operation. Most preferably, an extruder is used, followed by a chopper to make the extrudates.
In accordance with a preferred method within the framework of the present invention, the (partial) hydrogenation reaction of the unsaturated (co)polymer in the presence of the titanium compound-containing composition may be carried out in solution in an inert solvent. The term "inert solvent" signifies an organic solvent that does not react with any of the reactants participating in the reaction. Examples of inert solvents whose use is recommended within the framework of the invention are aliphatic and cycloaliphatic hydrocarbons such as n-hexane, n-octane, isooctane, cyclohexane, methylcyclopentane, methylcyclohexane, ethers such as tetrahydrofuran, aromatic hydrocarbons such as toluene, xylenes, etc., which are not hydrogenated under the reaction conditions selected, and mixtures of these compounds. The amount of activated titanium compound-containing composition to be used in the hydrogenation is not critical and may vary within broad limits; it can be comprised between 0.001 and 10 millimoles of titanium compound per 100 g of substance to be (partially) hydrogenated, and preferably between 0.01 and 5
mmoles of titanium compound per 100 g of substance to be (partially) hydrogenated.
To achieve the (partial) hydrogenation of the double bonds of the unsaturated (co)polymers, reaction temperatures of between approximately 20 and 150°C, preferably between 50 and 100°C, and hydrogen pressures of between approximately 1 and 70 kg/cm2, preferably between 4 and 12 kg/cm2, can be used.
The products of the (partial) hydrogenation may be readily separated from the solvent used by means of known processes such as distillation, precipitation, etc. In particular, the partially or completely hydrogenated polymers and copolymers may be separated from the solvent by various methods:
(1 ) By contacting the (partially) hydrogenated product/solution with a polar solvent such as acetone, methanol, and the like which, by being a poor solvent of the (co)polymer, causes the latter's precipitation and permits its physical separation.
(2) By contacting the (partially) hydrogenated product/solution with water and steam and eliminating the solvent by evaporation, separating the water, and drying the (co)polymer.
(3) By direct evaporation of the solvent.
EXAMPLE
400 grams of TDC (titanocene dichloride) were conveyed onto 600 grams of the desired polymer/rubber and shaken by hand. The premix was dosed to a Haake TW100 twin screw extruder fitted with intensive mixing screws. The extruder settings are temperature 160 (throat) - 175°C, 75 rpm. The extruded strand was fed through a water bath for cooling and cut by a granulator into pellets of 2 mm diameter and 2-3 mm length.
0.625 gram of the above titanocene dichloride extrudate (active material: 0.25 g, 0.001 mol) was added to 750 ml of an anhydrous solution of 100 grams (non- hydrogenated) butadiene polymer in heptane solvent under an argon atmosphere in an autoclave.
To this solution were added 1 .5 grams of butylethyl magnesium solution in heptane (0.003 mol) and the reaction mixture was stirred for 2 hours, to activate the titanium compound.
Then the autoclave is pressurized with 50 atm of hydrogen and brought to a temperature of 60°C by heating with a bath. The hydrogenation is carried out under these conditions for a duration of 120 minutes, with continuous feeding of hydrogen to keep the pressure value constant, which continuous feeding suggests the consumption of hydrogen gas and, hence, hydrogenation of the butadiene polymer. After the reaction, the pressure is released and the polymer isolated by precipitation in methanol.
Claims
Process to (partially) hydrogenate unsaturated bonds of a (co)polymer substrate comprising adding a titanium compound to the (co)polymer substrate, activating the titanium compound by adding an organometallic compound, and reacting said substrate with hydrogen in the presence of the activated titanium compound, wherein the titanium compound is added as a titanium compound-containing composition containing between 5 and 95 wt% on the total weight of the composition of the titanium compound and between 5 and 95 wt% on the total weight of the composition of at least one (co)polymer, and the titanium compound is distributed in the at least one (co)polymer.
Process of claim 1 , wherein the organometallic compound is selected from the group of organolithium, organomagnesium, and organoaluminium compounds.
Process of claim 2, wherein the organolithium, organomagnesium or organoaluminium compounds are selected from the group of n-butyllithium, sec.-butyllithium, dibutylmagnesium, butyloctyl magnesium, butylethyl magnesium, tri-isobutyl aluminium, and triethyl aluminium.
4. Process of any one of claims 1 to 3, wherein the amount of titanium compound is between 30 and 50 wt% on the total titanium compound- containing composition.
Process of any one of claims 1 to 4, wherein the titanium compound is a complex of the formula TiR1 R2R3R4 wherein at least one of the groups R1 to R4 is an organic group.
Process of any one of claims 1 to 5, wherein the titanium compound is titanocene dichloride.
Process of any one of claims 1 to 6, wherein the (co)polymer in the titanium compound-containing composition is the (co)polymer to be hydrogenated in the process or is such (co)polymer partially or completely hydrogenated.
Process of any one of claims 1 to 7, wherein the (co)polymer is a non- hydrogenated, partially or fully hydrogenated (co)polymer of a diene monomer.
Titanium compound-containing composition suitable for use in the process of any one of claims 1 to 8 wherein the composition contains between 5 and 95 wt% on the total weight of the composition of a titanium compound of the formula TiR1 R2R3R4 wherein at least one of the groups R1 to R4 is an anionic aromatic group directly linked to the titanium atom, and between 5 and 95 wt% on the total weight of the composition of at least one (co)polymer, and the titanium compound is distributed in the at least one (co)polymer
Titanium compound-containing composition suitable for use in the process of any one of claims 1 to 8 wherein the composition contains between 20 and 60 wt% on the total weight of the composition of a titanium compound of the formula TiR1 R2R3R4, and between 40 and 80 wt% on the total weight
of the composition of at least one (co)polymer, and the titanium compound is distributed in the at least one (co)polymer.
1 1. Composition of claim 9 or 10, wherein the titanium compound is titanocene dichloride.
12. Composition of any one of claims 9 to 1 1 , wherein the (co)polymer is a non- hydrogenated, partially or fully hydrogenated (co)polymer of a diene monomer.
13. Process to prepare the composition of any one of claims 9 to 12, wherein in a first step the titanium compound is mixed with the (co)polymer and in a subsequent step the mixture of the titanium compound and the (co)polymer is particulated.
14. Process of claim 13, wherein the titanium compound is mixed with the (co)polymer at a temperature higher than the Tg of the (co)polymer.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4216107A (en) | 1978-05-11 | 1980-08-05 | Basf Wyandotte Corporation | Organic titanium compounds as viscosity improvers for polyol compounds |
US5583185A (en) | 1992-11-03 | 1996-12-10 | Repsol Quimica S.A. | Process for hydrogenation in solution of the double bonds of conjugated dienes, and hydrogenated block copolymer produced |
US6376603B1 (en) | 1999-11-17 | 2002-04-23 | Shin-Etsu Chemical Co., Ltd. | Titanium oxide-filled addition reaction-curable silicone rubber composition |
US6417286B1 (en) | 1999-09-08 | 2002-07-09 | The Goodyear Tire & Rubber Company | Titanium and zirconium compounds |
DE102009036390A1 (en) * | 2008-08-08 | 2010-04-15 | Sumitomo Chemical Company, Limited | Hydrogenation catalyst and process for producing an olefin polymer |
-
2014
- 2014-05-21 WO PCT/EP2014/060444 patent/WO2014187861A1/en active Application Filing
- 2014-05-21 EP EP14725458.5A patent/EP3004228A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4216107A (en) | 1978-05-11 | 1980-08-05 | Basf Wyandotte Corporation | Organic titanium compounds as viscosity improvers for polyol compounds |
US5583185A (en) | 1992-11-03 | 1996-12-10 | Repsol Quimica S.A. | Process for hydrogenation in solution of the double bonds of conjugated dienes, and hydrogenated block copolymer produced |
US6417286B1 (en) | 1999-09-08 | 2002-07-09 | The Goodyear Tire & Rubber Company | Titanium and zirconium compounds |
US6376603B1 (en) | 1999-11-17 | 2002-04-23 | Shin-Etsu Chemical Co., Ltd. | Titanium oxide-filled addition reaction-curable silicone rubber composition |
DE102009036390A1 (en) * | 2008-08-08 | 2010-04-15 | Sumitomo Chemical Company, Limited | Hydrogenation catalyst and process for producing an olefin polymer |
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