摘要:
The invention relates to a catalyst system for the selective trimerization of olefins, which system is based on a titanium complex of formula (Cp-B(R)nAr)TiR13, wherein: Cp is a cyclopentadienyl type ligand, optionally substituted, B is a bridging group, based on a single atom selected from the groups 13 to 16 inclusive of the Periodic System, Ar is a aromatic group, optionally substituted, R is, independently, hydrogen, or a hydrocarbon residue, optionally being substituted and optionally containing heteroatoms, or groups R and B are joined together to form a ring, n is an integer equal to the (valency of B minus 2), and R1 is a mono-anionic group, and further comprises an activator. The present catalyst system obviates the use of toxic chromium compounds.
摘要翻译:本发明涉及一种用于烯烃选择性三聚的催化剂体系,该系统基于式(Cp-B(R)Ar Ar Ti Ti 1 O) 其中:Cp是环戊二烯基型配体,任选地被取代,B是基于选自包括周期系的第13至16族中的单个原子的桥连基团,Ar是芳族基团 任选取代的R独立地为氢,或任选被取代且任选地含有杂原子的烃残基,或基团R和B连接在一起形成环,n是等于(B的化合价减去2 ),R 1是单阴离子基团,并且还包含活化剂。 本催化剂体系避免使用有毒的铬化合物。
摘要:
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic multidentate ancillary ligand and two monoanionic ligands. The ancillary ligand and the transition metal form a metallocycle having at least five primary atoms, counting any π-bound cyclopentadienyl group in the metallocycle as two primary atoms. Olefin polymerization is exemplified.
摘要:
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic amidinate ancillary ligand. Upon reaction with an activator, the complex becomes an active olefin-polymerization catalyst. Some invention processes give narrow polymer polydispersities.
摘要:
The invention provides a catalyst composition for hydrogenation of polymers containing ethylenical unsaturation which comprises at least:(a) a titanium compound of the formula ##STR1## (I) wherein A.sub.1 represents an optionally substituted indenyl group of the formula ##STR2## wherein substituents R.sub.1 and R.sub.2 may be the same or different and each may be selected from halogen, phenyl which optionally may bear one or more the same or different substituents, lower alkyl, alkoxy, phenoxy, phenylalkoxy, benzyl, and a bulky substituent containing one or more hetero atoms such as tri (loweralkyl)silyl, --NPh.sub.2, --NHPh, --BPh.sub.2, and --B(OPh).sub.2, wherein n may be an integer of from 0 to 4 and m may be an integer of from 0 to 3,(II)wherein A.sub.2 has the same meaning as A.sub.1 or alternatively represents an optionally substituted cyclopentadienyl group, and wherein L.sub.1 and L.sub.2 may be the same or different and each may be selected from hydrogen, halogen and preferred chlorine, lower alkyl, phenyl, aralkyl having from 7 to 10 carbons, a lower alkoxy group, phenyloxy, phenylalkoxy group having from 7 to 10 carbon atoms, carboxyl, carbonyl, a B-diketone coordination, a --CH.sub.2 P(Phenyl).sub.2, --CH.sub.2 Si(lower alkyl).sub.3 or --P(phenyl).sub.2 group; and(b) an alkali metal hydride, added as such or prepared in situ in the polymer solution from the alkali metal terminated living polymer and/or from additionally added alkali metal alkyl. The invention also concerns a process for hydrogenation of polymers containing ethylenical unsaturation using this catalyst.
摘要:
The invention provides a catalyst composition suitable for hydrogenation of polymers containing ethylenical unsaturation which comprises at least:(a) a titanium compound of the formula ##STR1## wherein A.sub.1 represents an optionally substituted heterocyclic five membered ring comprising a phosphorous or nitrogen heteroatom, and A.sub.2 has the same meaning as A.sub.1 or alternatively represents an optionally substituted cyclopentadienyl group or indenyl group, and wherein L.sub.1 and L.sub.2 may be the same or different and each may be selected from hydrogen, halogen, lower alkyl, phenyl, aralkyl, having from 7 to 10 carbons, lower alkoxy group, phenyloxy, phenylalkoxy group having from 7 to 10 carbon atoms, carboxyl, carbonyl, a .about.CH.sub.2 P(Phenyl).sub.2, --CH.sub.2 Si(lower alkyl).sub.3 or .about.P(phenyl).sub.2 group; and (b) an alkalimetal hydride, added as such or prepared in situ in the polymer solution from the alkalimetal terminated living polymer and/or from additionally added alkalimetal alkyl. The invention further provides a process for hydrogenation of polymers containing ethylenical unsaturation.
摘要:
This invention is a process for the selective hydrogenation of block copolymers having at least one poly(vinyl aromatic) block and at least one poly(conjugated diene) block which comprises contacting the block copolymers with hydrogen in the presence of a hydrogenation catalyst composition which comprises:a) a metal compound cation of the formula �(A)(E)M(R.sub.4)!.sup.+ wherein M represents titanium, zirconium, or hafnium, A and E each represent ligands with structure I or II ##STR1## in which R.sub.1 independently represents the same or different hydrocarbyl groups optionally containing heteroatoms, and R.sub.3 independently represents the same or different hydrocarbonyl groups optionally containing heteroatoms, or a halide, and in which R.sub.1 and R.sub.3 may be shared between A and E to provide a bridge, wherein m is an integer from 0-5, p is an integer from 0-4, and q is an integer from 0-3, wherein R.sub.4 represents hydrogen or hydrocarbyl group optionally containing heteroatoms, with the proviso that if A and E are both ligands with the same structure, at least one of m, p or q is at least 1, andb) a non-coordinating stable anion.
摘要:
The invention provides a catalyst composition suitable for hydrogenation of polymers containing ethylenic unsaturation, which comprise: (a) a titanium compound of the formula, ##STR1## wherein A.sub.1 and A.sub.2 are the same or different and each represents a substituted or unsubstituted cyclopentadienyl or indenyl group, wherein X.sub.1 and X.sub.2 are the same or different and each represents hydrogen, halogen, a lower alkyl or lower alkoxy, optionally substituted phenyl or phenoxy, or aralkyl having from 7 to 10 carbon atoms, or phenylalkoxy having from 7 to 10 carbon atoms, carboxyl, carbonyl, a --CH.sub.2 P(Phenyl).sub.2, --CH.sub.2 Si(lower alkyl).sub.3, or --P(phenyl).sub.2 group. (b) an alkalimetal hydride, added as such or prepared in situ in the polymer solution from the alkalimetal terminated living polymer and/or from additionally added alkalimetal alkyl and hydrogen, the molar ratio of the alkalimetal:titanium in the polymer solution during hydrogenation being at least 2:1; (c) a borium compound B(R.sub.1)(R.sub.2)(R.sub.3) wherein the symbols R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each may represent hydrogen, halogen, lower alkyl or lower alkoxy, or phenyl optionally substituted by up to five substituents selected from halogen and lower alkyl, or benzyl having an optionally substituted phenyl ring as specified hereinbefore or wherein two of the symbols R may form together a monocyclic or bicyclic system which on its own may carry one or more substituents. A process for hydrogenation of polymers containing ehylenic unsaturation using these catalyst compositions is also described.