CN1611518A - Catalyst for preparing syndiotactic polystyrene - Google Patents
Catalyst for preparing syndiotactic polystyrene Download PDFInfo
- Publication number
- CN1611518A CN1611518A CN 200310108170 CN200310108170A CN1611518A CN 1611518 A CN1611518 A CN 1611518A CN 200310108170 CN200310108170 CN 200310108170 CN 200310108170 A CN200310108170 A CN 200310108170A CN 1611518 A CN1611518 A CN 1611518A
- Authority
- CN
- China
- Prior art keywords
- catalyzer
- syndiotactic polystyrene
- catalyst
- titanium compound
- cyclopentadienyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920010524 Syndiotactic polystyrene Polymers 0.000 title claims description 17
- 239000003054 catalyst Substances 0.000 title abstract description 12
- 239000010936 titanium Substances 0.000 claims abstract description 22
- 150000003609 titanium compounds Chemical class 0.000 claims abstract description 15
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 10
- 125000002097 pentamethylcyclopentadienyl group Chemical group 0.000 claims abstract description 8
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 claims abstract description 7
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- -1 isobutyl- Chemical group 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 15
- 230000003197 catalytic effect Effects 0.000 abstract description 10
- 238000006116 polymerization reaction Methods 0.000 abstract description 6
- 125000005234 alkyl aluminium group Chemical group 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 abstract 1
- 230000006978 adaptation Effects 0.000 abstract 1
- 150000001335 aliphatic alkanes Chemical class 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 125000004430 oxygen atom Chemical group O* 0.000 abstract 1
- 239000002685 polymerization catalyst Substances 0.000 abstract 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 229920000642 polymer Polymers 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- 235000010210 aluminium Nutrition 0.000 description 9
- CPOFMOWDMVWCLF-UHFFFAOYSA-N methyl(oxo)alumane Chemical compound C[Al]=O CPOFMOWDMVWCLF-UHFFFAOYSA-N 0.000 description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 7
- DZGCGKFAPXFTNM-UHFFFAOYSA-N ethanol;hydron;chloride Chemical compound Cl.CCO DZGCGKFAPXFTNM-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000010907 mechanical stirring Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- MCULRUJILOGHCJ-UHFFFAOYSA-N triisobutylaluminium Chemical compound CC(C)C[Al](CC(C)C)CC(C)C MCULRUJILOGHCJ-UHFFFAOYSA-N 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- MCJUWBUSIQXMPY-UHFFFAOYSA-N cyclopenta-1,3-diene titanium Chemical compound [Ti].C1C=CC=C1 MCJUWBUSIQXMPY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 101100004287 Caenorhabditis elegans best-6 gene Proteins 0.000 description 1
- LIQLLTGUOSHGKY-UHFFFAOYSA-N [B].[F] Chemical compound [B].[F] LIQLLTGUOSHGKY-UHFFFAOYSA-N 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 125000006575 electron-withdrawing group Chemical group 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000007172 homogeneous catalysis Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- RBXVOQPAMPBADW-UHFFFAOYSA-N nitrous acid;phenol Chemical class ON=O.OC1=CC=CC=C1 RBXVOQPAMPBADW-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001576 syndiotactic polymer Polymers 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
Landscapes
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
The invention relates to a kind of catalyst for manufacturing syndiotactic-polymerization styrene, which mainly solves the problems, such as low catalytic efficiency and difficult adaptation to industrial demands, in styrene previous syndiotactic-polymerization with metallocene titanium compound as catalyst. The invention uses metallocene titanium compound, alkyl aluminium oxygen alkane, and alkyl aluminium composed as styrene syndiotactic-polymerization catalyst, the structure general formula of which is R1Ti(O-C6H4-NO2)3. And in the general formula, R1 is cyclopentadienyl or pentamethyl cyclopentadienyl, C6H4 is phenyl, Ti connects to phenyl with oxygen atom. The technical proposal described above can solve the problems excellently, and it can be used in styrene syndiotactic-polymerization industry production.
Description
Technical field
The present invention relates to be used to prepare the catalyzer of syndiotactic polystyrene.
Background technology
The homogeneous catalysis system that cyclopentadiene titanium compound and promotor methylaluminoxane (MAO) or boron fluorine cpd are formed is used for syndiotactic polymerization of phenylethylene and can obtains a normality at the syndiotactic polymer more than 96%.Melting point polymer is up to 270 ℃, and crystallization velocity is fast, chemically-resistant, and good heat resistance, narrow molecular weight distribution, dimensional stability is good, and has excellent electric performance, and its over-all properties can be compared with engineering plastics.The appearance of syndiotactic polystyrene (SPS) has caused people to its catalyst system, particularly the research of Primary Catalysts metallocene compound.Document US 5252693 and EP210615 have reported that structure is CpTiCl
3And Cp
*TiCl
3The catalyst system of forming with promotor MAO is used for the situation of syndiotactic polymerization of phenylethylene, and wherein Cp is a cyclopentadienyl, Cp
*Be the pentamethyl-cyclopentadienyl, but its catalytic activity and catalytic efficiency are not high, poor stability, industrial application value is little.Patent US4978730, US5023222, US5045517 and US5196490 have reported the high CpTi of present catalytic efficiency (OR)
3And Cp
*Ti (OR)
3Type catalyzer (R is an alkyl or aryl), specific activity had raising in the past, but from industry distance need be arranged still.We had once reported the high reactivity halogenated benzene compound, but did not relate to strong electron-withdrawing group group nitro-compound.
Summary of the invention
Technical problem to be solved by this invention is the low problem of cyclopentadiene titanium compound catalytic activity that overcomes in the document in the past, and a kind of new catalyzer that is used to prepare syndiotactic polystyrene is provided.The catalyzer raw material cheaply is easy to get among the present invention, when this catalyst system is used to prepare syndiotactic polystyrene, has the high characteristics of catalytic activity.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of catalyzer that is used to prepare syndiotactic polystyrene comprises metallocene titanium compound (I), alkylaluminoxane (II) and aluminum alkyls (III);
R
1Ti(O-C
6H
4-NO
2)
3 I
Al(R
3)
3 III
In the formula: R
1Be pentamethyl-cyclopentadienyl or cyclopentadienyl;
R
2For containing the alkyl of 1～4 carbon atom;
N is the oligomerisation degree of alkylaluminoxane, and its value is 6～40;
R
3For containing the alkyl of 1～4 carbon atom;
There is Sauerstoffatom to link to each other between Ti and the phenyl;
Wherein aluminium is 50～2000 to the titanium mole ratio in the metallocene titanium compound (I) in the alkylaluminoxane (II), and aluminium is 50～400 to the titanium mole ratio in the metallocene titanium compound (I) in the aluminum alkyls (III).
R in the technique scheme
1Preferred version is the pentamethyl-cyclopentadienyl, R
2Preferred version is a methyl, R
3Preferred version is an isobutyl-.The value preferable range of the oligomerisation degree n of alkylaluminoxane is 10～30, and aluminium is 50～800 to the mole ratio preferable range of titanium in the metallocene titanium compound (I) in the alkylaluminoxane (II).Be phenyl ring between O and the N atom; NO
2Be positioned at phenyl ring the neighbour, or contraposition, preferred version is the contraposition of phenyl ring.
The metallocene titanium compound preparation technology who uses in the catalyzer of the present invention is obtained with the reaction of hydrocarbon polymer as solvent in the presence of chlorine hydride absorbent by corresponding cyclopentadienyl titanous chloride and substituted phenol (nitrophenols).Chlorine hydride absorbent can be various aminated compoundss, wherein is advisable with trialkylamine, for example triethylamine.Hydrocarbon polymer can be aliphatic hydrocarbon or aromatic hydrocarbon, uses aromatic hydrocarbons better, benzene for example, toluene, dimethylbenzene etc.The mole ratio of cyclopentadienyl titanous chloride and hydroxyl is 1: 3.0～3.5, the mole ratio of cyclopentadienyl titanous chloride and triethylamine is 1: 3.0～4.0, temperature of reaction is 1～130 ℃, preferably 30～80 ℃, reaction times is 2～48 hours, best 6～24 hours, reaction process was preferably used intermittently heating operation.
Above-claimed cpd that uses among the present invention and alkylaluminoxane and aluminum alkyls are through mixed catalyzer usually.When this catalyzer was used as Syndiospecific Polymerization of Styrene, its catalytic efficiency reached as high as 362 kg of polymer/gram titanium, has obtained better technical effect.
Work as R
1Structural formula of compound is during for the pentamethyl-cyclopentadienyl:
Ultimate analysis (element analysis)
C
28H
27O
9N
3Ti：M＝597
The theoretical value measured value
C 56.28％ C 56.79％
H 4.52％ H 4.51％
N 7.04％ N 6.94％
The proton nmr spectrum
[HNMR?CDCl
3?TMS?intern]
δ6.50～6.80(m，12H，-(OPhH-)
3)
δ1.95～2.15(s，15H，Cp-CH
3)
Mass spectroscopy MS (m/e, %intensity)
597(23.32，M)
459(100，M-OPh-NO
2)
321(19.67，M-2(OPh-NO
2))
The invention will be further elaborated below by embodiment.
Embodiment
[embodiment 1]
Preparation of Catalyst
In the there-necked flask of 250 milliliters of exsiccant, N
2Pump drainage 3 times adds the 1.186 single luxuriant titanium of gram pentamethyl-trichlorine and 70 milliliters of benzene, is heated to the benzene reflux temperature, the vigorous stirring dissolving, from 40 milliliters of benzene of top dropping, the mixture of 1.7 gram p-NPs and 1.3 gram triethylamines, drip off after 60 minutes, react after 5 hours, stop heating, normal-temperature reaction 10 hours, filter, filtrate is drained, and uses toluene, hexane mixing solutions (1: 5) recrystallization three times, drain, get micro-yellow crystals 1.1 grams.
[embodiment 2]
On in baking, 50 milliliters of two mouthfuls of bottles of exsiccant, use high-purity N
2Pump drainage 3 times, add 10 milliliters of commercial benzene vinyl monomers, induction stirring was injected triisobutyl aluminium 0.2 mmole with syringe after 20 minutes in 60 ℃ of oil baths, MAO 0.4 mmole, the metallocene titanium compound catalyzer 0.001 mmole reaction of embodiment 1 with ethanol-hydrochloric acid soln stopped reaction, was washed after 10 minutes, dry that powder solid 3.01 restrains, catalytic activity 335 kg of polymer/(the gram titanium. hour), a normality 96%, Mw=42 * 10
4
[embodiment 3]
On in baking, 50 milliliters of two mouthfuls of bottles of exsiccant, use high-purity N
2Pump drainage 3 times, add 10 milliliters of commercial benzene vinyl monomers, induction stirring was injected triisobutyl aluminium 0.2 mmole with syringe after 20 minutes in 60 ℃ of oil baths, MAO 0.6 mmole, the metallocene titanium compound catalyzer 0.001 mmole reaction of embodiment 1 with ethanol-hydrochloric acid soln stopped reaction, was washed after 10 minutes, dry that powder solid 3.17 restrains, catalytic activity 362 kg of polymer/(the gram titanium. hour), a normality 97%, Mw=35 * 10
4
[embodiment 4]
On 10 liters of mechanical stirring kettles, after 8 hours, be cooled to 60 ℃, N 90 ℃ of bakings earlier
2Pump drainage 3 times adds styrene monomer 2375 grams, stirs after 30 minutes, contain 52.8 mmole triisobutyl aluminiums with the syringe injection, 105.6 mmole MAO, the metallocene titanium compound catalyzer toluene solution of 0.264 mmole embodiment 1 is at 300 rev/mins of following stirring reactions after 3 hours, with ethanol-hydrochloric acid soln stopped reaction, washing, dry that powder solid 1100 restrains catalyst efficiency 86.5 kg of polymer/(gram titanium), between normality 97%, Mw=42 * 10
4
[embodiment 5]
On 10 liters of mechanical stirring kettles, after 8 hours, be cooled to 60 ℃, N 90 ℃ of bakings earlier
2Pump drainage 3 times adds styrene monomer 2375 grams, stirs after 30 minutes, contain 52.8 mmole triisobutyl aluminiums with the syringe injection, 105.6 mmole MAO, the metallocene titanium compound catalyzer toluene solution of 0.264 mmole embodiment 1 is at 300 rev/mins of following stirring reactions after 3 hours, with ethanol-hydrochloric acid soln stopped reaction, washing, dry that powder solid 1257 restrains catalyst efficiency 98.3 kg of polymer/(gram titanium), between normality 97%, Mw=44 * 10
4
[comparative example 1]
On in baking, 50 milliliters of two mouthfuls of bottles of exsiccant, use high-purity N
2Pump drainage 3 times adds 10 milliliters of commercial benzene vinyl monomers, and induction stirring was injected triisobutyl aluminium 0.4 mmole, MAO 0.4 mmole, Cp with syringe after 20 minutes in 60 ℃ of oil baths
*TiCl
30.001 mmole reaction (Cp after 10 minutes
*Be the pentamethyl-cyclopentadienyl), with ethanol-hydrochloric acid soln stopped reaction, washing, dry that powder solid 0.41 restrains, catalytic activity 51 kg of polymer/(the gram titanium. hour), a normality 94%, Mw=15 * 10
4
[comparative example 2]
On 10 liters of mechanical stirring kettles, after 8 hours, be cooled to 60 ℃, N 90 ℃ of bakings earlier
2Pump drainage 3 times adds styrene monomer 2375 grams, stirs after 30 minutes, injects with syringe to contain 52.8 mmole triisobutyl aluminiums, 105.6 mmole MAO, 0.264 mmole Cp
*TiCl
3The metallocene-titanium catalyst toluene solution, with ethanol-hydrochloric acid soln stopped reaction, washs after 3 hours at 300 rev/mins of following stirring reactions, and is dry that powder solid 251 restrains catalyst efficiency 19.6 kg of polymer/(gram titanium), a normality 97%, Mw=14 * 10
4
Claims (9)
1, a kind of catalyzer that is used to prepare syndiotactic polystyrene comprises metallocene titanium compound (I), alkylaluminoxane (II) and aluminum alkyls (III);
R
1Ti(O-C
6H
4-NO
2)
3 I
Al(R
3)
3 III
In the formula: R
1Be pentamethyl-cyclopentadienyl or cyclopentadienyl;
R
2For containing the alkyl of 1～4 carbon atom;
N is the oligomerisation degree of alkylaluminoxane, and its value is 6～40;
R
3For containing the alkyl of 1～4 carbon atom;
There is Sauerstoffatom to link to each other between Ti and the phenyl;
Wherein aluminium is 50～2000 to the titanium mole ratio in the metallocene titanium compound (I) in the alkylaluminoxane (II), and aluminium is 50～400 to the titanium mole ratio in the metallocene titanium compound (I) in the aluminum alkyls (III).
2, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 1 is characterized in that R
1Be the pentamethyl-cyclopentadienyl.
3, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 1 is characterized in that R
2Be methyl.
4, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 1 is characterized in that the value of the oligomerisation degree n of alkylaluminoxane is 10～30.
5, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 1 is characterized in that R
3Be isobutyl-.
6, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 1 is characterized in that the middle aluminium of alkylaluminoxane (II) is 50～800 to the mole ratio of titanium in the metallocene titanium compound (I).
7, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 1 is characterized in that being between O and the N atom phenyl ring.
8, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 7 is characterized in that NO
2Be positioned at phenyl ring the neighbour, or contraposition.
9, the catalyzer that is used to prepare syndiotactic polystyrene according to claim 8 is characterized in that NO
2Be positioned at the contraposition of phenyl ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310108170 CN1252101C (en) | 2003-10-27 | 2003-10-27 | Catalyst for preparing syndiotactic polystyrene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310108170 CN1252101C (en) | 2003-10-27 | 2003-10-27 | Catalyst for preparing syndiotactic polystyrene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1611518A true CN1611518A (en) | 2005-05-04 |
| CN1252101C CN1252101C (en) | 2006-04-19 |
Family
ID=34758492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310108170 Expired - Lifetime CN1252101C (en) | 2003-10-27 | 2003-10-27 | Catalyst for preparing syndiotactic polystyrene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1252101C (en) |
-
2003
- 2003-10-27 CN CN 200310108170 patent/CN1252101C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1252101C (en) | 2006-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1259327C (en) | Cyclopentadienyl metal titanium compound and its use | |
| CN1252101C (en) | Catalyst for preparing syndiotactic polystyrene | |
| CN1130394C (en) | Catalyst for preparation of syndiotactic polystyrene | |
| CN1208354C (en) | Metallocene titanium compound and use thereof | |
| CN1176928C (en) | Metallocene-titanium metal compound and uses thereof | |
| CN1233667C (en) | Metallocene titanium compound and use thereof | |
| CN1241959C (en) | Catalyst for preparing syndiotactic polysterol | |
| CN1176927C (en) | Metallocene titanium compound | |
| CN1098271C (en) | Cyclopentadiene titanium compound | |
| CN1176926C (en) | Cyclopentadienyl titanium compound | |
| CN1207315C (en) | Catalyst for preparing syndiotacti polystyrene | |
| CN1093140C (en) | Catalyst for preparing syndiotactic poly styrene | |
| CN1065870C (en) | Metallocene compound | |
| CN1076733C (en) | Catalyst for preparing syndiotactic polystyrene | |
| CN1065872C (en) | Cyclopentadiene titanium compound | |
| CN1116320C (en) | Catalyst for syndiotatic phenylethylene polymerization | |
| CN1288173C (en) | Polystyrene loaded IVB family compound and its use in ethylene polymerization | |
| CN1209389C (en) | Syndiotactic polystyrene sythesizing 2-hydroxy benzophenone titanium catalyst and its preparing method | |
| CN1117106C (en) | Syndiotactic poly styrene polymer | |
| CN1116310C (en) | Metallocene titanium compound and its preparing process | |
| CN1055935C (en) | Process for preparing styrene-ethylene block copolymer | |
| CN102746436A (en) | Double peak and wide molecular weight distribution syndiotactic polystyrene polymer | |
| US6921734B2 (en) | Titanocene complexes and its catalyst for preparing syndiotactic polystyrene | |
| US6174973B1 (en) | Process for the preparation of vinylaromatic polymers with a high degree of syndiotaxy | |
| CN118852275A (en) | Titanium-metallocene catalyst and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20060419 |