Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO1998051716) PROCESS FOR PREPARING TACTIOSELECTIVE POLYOLEFINS IN CONDENSED PHASE USING HAFNOCENES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051716 International Application No.: PCT/EP1998/002741
Publication Date: 19.11.1998 International Filing Date: 11.05.1998
Chapter 2 Demand Filed: 02.12.1998
IPC:
C08F 4/659 (2006.01) ,C08F 10/00 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
4
Polymerisation catalysts
42
Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
44
selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths, or actinides
60
together with refractory metals, iron group metals, platinum group metals, manganese, technetium, rhenium, or compounds thereof
62
Refractory metals or compounds thereof
64
Titanium, zirconium, hafnium, or compounds thereof
659
Component covered by group C08F4/6455
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
10
Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
Applicants:
MONTELL TECHNOLOGY COMPANY B.V. [NL/NL]; Hoeksteen 66 NL-2132 MS Hoofddorp, NL
Inventors:
EWEN, John, A.; US
Agent:
ZANOLI, Enrico; Montell Italia S.p.A. Via Pergolesi, 25 I-20124 Milano, IT
Priority Data:
08/855,05713.05.1997US
Title (EN) PROCESS FOR PREPARING TACTIOSELECTIVE POLYOLEFINS IN CONDENSED PHASE USING HAFNOCENES
(FR) PROCEDE DE PREPARATION DE POLYOLEFINES TACTIOSELECTIVES EN PHASE CONDENSEE A L'AIDE D'HAFNOCENES
Abstract:
(EN) A process for polymerizing addition polymerizable monomers using hafnocenes catalysts/catalyst precursors having a selected symmetry condition under condensed polymerization conditions where the symmetry condition is such that the resulting polymer has varying degrees of tactioselectivity or copolymers having regions of varying degrees of tactioselectivity. Preferred classes of the hafnocenes are capable of generating near pure isospecific polymers in solution or in bulk polymerization conditions.
(FR) L'invention concerne un procédé de polymérisation de monomères d'addition pouvant être polymérisés à l'aide de catalyseurs d'hafnocènes/précurseurs de catalyseurs, présentant une condition de symétrie sélectionnée dans des conditions de polymérisation condensée. Dans ces dernières, la condition de symétrie est telle que le polymère obtenu présente divers degrés de tactiosélectivité ou des copolymères avec des zones dont les degrés de tactiosélectivité sont différents. Les classes d'hafnocènes préférées permettent de générer des polymères isospécifiques quasiment purs en solution ou dans des conditions de polymérisation en vrac.
Designated States: JP
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0981552JP2001525004