Abstract:
The present invention relates to catalytic patterns, the active components of which are A) metal complexes of general formula (I), in which the substituents have the following notation: M is a metal of the subgroup III, IV, V or VI in the periodic table of the elements or a metal of the lanthanide series; Y is a negative nucleofuge atom or a negative leaving group; X and X are neutral atoms or negatively loaded atoms from the main group IV, V or VI in the periodic table of the elements; Z is hydrogen, C1- to C10-alkyl, C3- to C10-cycloalkyl, C1- to C10-alkoxy, C1- to C10-alkylthiolat or dialkylamide with, in each case, 1 to 4 C-atoms in the alkyl residues; R to R are hydrogen, organocarbon or organosilicon residues, n is 0, 1 or 2, the valence of M is (2+n), and B) a metallocenium-ionizing compound.
Abstract:
The invention relates to thermoplastic moulding materials containing A) 10 - 98 wt. % of at least one thermoplastic polyester, B) 1 - 30 wt. % of a flame resistant material combination made of 100 wt. % B), b1) 20 99 wt. % of a flame resistant material containing halogen b2) 1 - 80 wt. % of an antimonoxide, C) 0.01 - 5 wt. % of tartaric acid or tartrates or a mixture thereof, D) 0 is 5 wt.- % of at least one stabilisator containing phosphorous, E) 0 - 70 wt.- % of additional materials, whereby the sum of the wt % of the components A) - E) is 100 %.
Abstract:
BInuclear metal hydride complexes of scandium, yttrium, lanthanum or a lanthanoid metal are claimed. A binuclear metal hydride complex (I) is of formula (1). M = scandium, yttrium or a lanthanoid metal; R = H, halogen, 1-20C alkyl, 3-10C cycloalkyl, 6-15C aryl or 3-30C organosilyl or two neighboring R groups may form a 4-18C cyclic or heterocyclic group; Z = SiR'2, -CR'2-, -GeR'2-, -SnR'2-, -BR'- or -O-; m = 1 or 2; X = -O-, -S-, -NR''-, -PR''-, -OR''-, -SR''-, -NR''2 or -PR''2; R'' = H, 1-20C alkyl, 3-10C cycloalkyl, 6-15C aryl, 1-10C alkyl-6-10C aryl or 3-30C organosilyl; L = a low mol. wt. Lewis basic organic compound R' = 1-20C alkyl, 1-10C cycloalkyl, 6-15C aryl or 1-10C alkyl- 6-10C-aryl; Independent claims are included for: (i) a process for the preparation of (I) by reacting a mononuclear metal complex (II) of formula (2) in the presence of hydrogen at 1.5-100 bar and 0-100 degrees C; and (ii) a process for the production of (co)polymers by copolymerization of polar monomers in the presence of (I).
Abstract:
Preparation of copolymers from unsaturated olefinic monomers and nonpolar olefins in which none or only a very small part of homopolymer is accumulated, in the presence of transition metal catalysts. Preparation of copolymers from unsaturated olefinic monomers and nonpolar olefins in which none or only a very small part of homopolymer is accumulated. The monomers are reacted with shielded aromatic monohydroxy compounds having sterically hindered groups or with a N-oxyl radical having sterically hindered groups in the presence of a transition metal compound of formula (Ia) or (Ib). R -R = H, 1-10C alkyl, 1-10C partially or perhalogenated alkyl, 3-10C cycloalkyl, 6-14C aryl, with functional groups based on Group IVA, VA, VIA, and VIIA elements, partially or persubstituted 1-14C aryl or 4-13C heteroaryl; X = alkylaryl, with 1-10C in alkyl and 6-14C in aryl residues, or Si(R )3, where R and R are not H. Alternatively, R and R together with Ca and Na or R and R together with Cb and Nb = a five-, six-, or seven-membered aromatic or aliphatic optionally substituted hetero ring, or R and R together with Ca and Cb = a five-, six-, or seven-membered aromatic or aliphatic optionally substituted carbo- or hetero-ring; R = H, 1-10C alkyl, 3-10C cycloalkyl, 6-14C aryl, X or Si(R )3; R = 1-10C alkyl, 3-10C cycloalkyl or X; m = 0 or 1; M = a Group VIIIB element; Q = acetonitrile, benzonitrile, , linear 1-4C alkyl ester, linear or cyclic alkyl ether, dimethylsulfoxide, dimethylformamide, hexamethylphosphoric acid triamide or halogenide; T = chloride, bromide, or iodide, or 1-20C alkyl which in the beta-position to the metal center has no H, and if necessary a 1-4C alkyl ester end or nitrile end group is available, or Q and T together form a C-3 alkylene chain with a a 1-4C linear alkyl ester or nitrile end group; A = non-coordinated or poorly coordinated anion; and n = 0, 1, 2 or 3.
Abstract:
The present invention is a process of preparing copolymers of vinyl aromatic and olefinic monomers wherein the polymerization is carried out in a dispersion in the presence of a metallocene catalyst and a dispersion aid. The dispersion aid is a styrene-diene two-block copolymer or a styrene-diene three-block copolymer. The resultant polymer is useful as a fiber, film or molding.
Abstract:
The invention relates to a method for producing monoalkyl metal complexes chelated with bidentate ligands, by reacting a transition-metal compound of general formula M(X)k (I) with a bidentate ligand in a polar protic solvent, in the presence of an alkaline, alkaline earth or ammonium halide or in the presence of benzonitrile, replacing said polar protic solvent with a non-coordinating polar aprotic solvent, and adding a tetraorgano tin compound to the resulting mixture.
Abstract:
Thermoplastic molding compositions comprising A) from 10 to 97% by weight of at least one polyester a1) other than polyethylene terephthalate (PET), which comprises, based on 100% by weight of A), from 1 to 50% by weight of PET a2), B) from 1 to 30% by weight of a flame retardant combination made from, based on 100% by weight of B), b1) from 20 to 99% by weight of a halogen-containing flame retardant, and b2) from 1 to 80% by weight of an antimony oxide, C) from 0.01 to 5% by weight of KH2PO4 or LiH2PO4, or a mixture of these D) from 0.01 to 3% by weight of an antidrop agent, and E) from 0 to 70% by weight of other additives, where the total of the percentages by weight of components A) to E) is 100%.
Abstract:
The invention relates to thermoplastic molding compositions comprising A) from 10 to 89.9% by weight of a thermoplastic polyester with a viscosity number (VN) of at least 145 ml/g B) from 10 to 89.99% by weight of a thermoplastic polyester with a viscosity number (VN) of not more than 135 ml/g C) from 0.01 to 5% by weight of at least one nucleating agent D) from 0 to 5% by weight of at least one lubricant E) from 0 to 70% by weight of other additives, the total of the percentages by weight of components A) to E) being 100%.