Dihetaryldimethylsilanes and dihetarylmethanes containing indeno[2,1-b]indolyl and indeno[2, 1-b]pyrrolyl fragments were synthesized. Their mutagenic activity was tested according to Ames with standard test strains Salmonella typhimurium TA 1537, TA 98, and TA 100.
Dihetaryldimethylsilanes and dihetarylmethanes containing indeno[2,1-b]indolyl and indeno[2, 1-b]pyrrolyl fragments were synthesized. Their mutagenic activity was tested according to Ames with standard test strains Salmonella typhimurium TA 1537, TA 98, and TA 100.
Metallocenes and catalysts for olefin-polymerisation
申请人:——
公开号:US20030148877A1
公开(公告)日:2003-08-07
A class of metallocenes of formula (I): (ZR
1
m
)
n
(Cp)(A)
r
ML
p
L′
q
(I) wherein ZR
1
m
) is a divalent group bridging Cp and A, Cp is a heterocyclic cyclopentadienyl group of formula (II) or (II′), wherein one of X or Y is a single bond, the other being an heteroatom; R
2
and R
3
are hydrogen, halogen or a hydrocarbon radical, optionally containing heteroatoms; R
4
is a halogen or an hydrocarbon radical, optionally containing heteroatoms; the group A is a cyclopentadienyl derivative or is equal to Cp; M is Ti, Zr or Hf; m is 1 or 2; n ranges from 0 to 4; r is 0 or 1; p and q range from 0 to 3; and a ranges from 0 to 4. Moreover, are disclosed catalyst systems containing these metallocenes, useful in the polymerization of olefins.
1
ETHYLENE/ALPHA-OLEFIN COPOLYMER HAVING EXCELLENT PROCESSABILITY
申请人:LG Chem, Ltd.
公开号:EP3070108A1
公开(公告)日:2016-09-21
The present invention relates to an ethylene/alpha-olefin copolymer having excellent processability. The ethylene/alpha-olefin copolymer according to the present invention has low complex viscosity at high shear rate and has excellent processability, and thus it could be applied to the processing of a large diameter pipe, a complex pipe or the like.
[EN] METALLOCENES AND CATALYSTS FOR OLEFIN-POLYMERISATION<br/>[FR] METALLOCENES ET CATALYSEURS POUR LA POLYMERISATION D'OLEFINES
申请人:MONTELL TECHNOLOGY COMPANY B.V.
公开号:WO1999024446A1
公开(公告)日:1999-05-20
(EN) A class of metallocenes of formula (I): (ZR1m)n(Cp)(A)rMLpL'q (I) wherein (ZR1m)n is a divalent group bridging Cp and A, Cp is a heterocyclic cyclopentadienyl group of formula (II) or (II'), wherein one of X or Y is a single bond, the other being an heteroatom; R2 and R3 are hydrogen, halogen or a hydrocarbon radical, optionally containing heteroatoms; R4 is halogen or an hydrocarbon radical, optionally containing heteroatoms; the group A is a cyclopentadienyl derivative or is equal to Cp; M is Ti, Zr or Hf; m is 1 or 2; n ranges from 0 to 4; r is 0 or 1; p and q range from 0 to 3; and a ranges from 0 to 4. Moreover, are disclosed catalyst systems containing these metallocenes, useful in the polymerization of olefins.(FR) L'invention concerne une classe de métallocènes de formule (ZR1m)n(CP)(A)rMLpL'q où (ZR1m)n est un groupe bivalent faisant un pont entre Cp et A, Cp est un groupe cyclopentadiénylique hétérocyclique de formule (II) ou (II') où un atome de X ou de Y est une liaison simple atome monovalent, l'autre étant un hétéroatome; R2 et R3 sont hydrogène, halogène ou un radical d'hydrocarbure, contenant éventuellement des hétéroatomes; R4 est halogène ou un radical d'hydrocarbure, contenant éventuellement des hétéroatomes; le groupe A est un dérivé cyclopentadiénylique ou est égal à Cp; M est Ti, Zr ou Hf; m vaut 1 ou 2; n vaut de 0 à 4; r vaut 0 ou 1; p et q valent de 0 à 3 et a vaut de 0 à 4. De plus, l'invention concerne des systèmes de catalyseurs renfermant ces métallocènes, qui conviennent particulièrement pour la polymérisation des oléfines.
New antioxidants incorporating indole and indoline chromophores
作者:David W Brown、Paul R Graupner、Malcolm Sainsbury、Howard G Shertzer
DOI:10.1016/s0040-4020(01)87108-8
日期:1991.1
Syntheses of potent antioxidants utilising indenoindole or indenoindoline pharmacophores are described. The antioxidant behaviour and the oxidation potentials of these compounds are correlated, and some of their reactions with radicals are noted.
METALLOCENES AND CATALYSTS FOR OLEFIN-POLYMERISATION