Abstract: Oligomers and polymers, obtainable fromA) from 0.001 to 100 mol % of at least one aminoalkene of the general formula I ##STR1## where X is an integer from 0 to 25 andR.sup.1 to R.sup.6 are hydrogen, C.sub.1 - to C.sub.10 -alkyl, 5- to 7-membered cycloalkyl which, in turn, can carry C.sub.1 - to C.sub.6 -alkyl groups as substituents or C.sub.6 - to C.sub.15 -aryl andB) from 0 to 99.999 mol % of at least one alkene,for x=1 in formula I propene being excluded as component B).

Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The invention particularly relates to a supported metallocene catalyst system that does not require an activator or cocatalyst for the polymerization of olefins.

Abstract: Disclosed is a novel bidentate pyridine transition metal catalyst having the general formula ##STR1## where Y is O, S, NR, ##STR2## each R is independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, each R' is independently selected from C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy, C.sub.6 to C.sub.16 aryl, halogen, or CF.sub.3, M is titanium, zirconium, or hafnium, each X is independently selected from halogen, C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy, or ##STR3## L is X, cyclopentadienyl, C.sub.1 to C.sub.6 alkyl substituted cyclopentadienyl, indenyl, fluorenyl, or ##STR4## and "n" is 1 to 4. Also disclosed is a method of making a poly-.alpha.-olefin comprising polymerizing an .alpha.-olefin monomer using that catalyst or a catalyst that has the general formula ##STR5## where Y, M, L, X, and R' were previously defined.

Abstract: This invention is generally directed toward a method for producing metallocene catalyst systems. Specifically, the method involves removing solid impurities from a solution of activated metallocene wherein activation has the effect of solubilizing the metallocene but not the impurities. The resulting catalyst system is higher in activity and produces polymer having excellent particle morphology with little or no reactor fouling.

Abstract: The present invention relates to a polymer including a fullerene core and a plurality of prepolymer units. Each of the prepolymer units is linked to a carbon atom of the core by a moiety independently selected from the group consisting of --O--(C.dbd.O)--NH--, --NH--(C.dbd.O)--NH--, --0--(C.dbd.S)--NH--, and --N--(C.dbd.S)--NH--.

Abstract: Isospecific and/or syndiospecific catalysts and processes for the propagation of an isotactic and/or syndiotactic polymer chain derived from an ethylenically unsaturated monomer which contains 3 or more carbon atoms or is a substituted vinyl compound. The catalysts comprise a stereorigid, stereodirected and stereolocked metallocene and/or metallocene cation catalysts, characterized by having .beta. stereodirecting substituents and .alpha. stereolocking substituents such that the catalysts have overall either C.sub.s or C.sub.2 (or pseudo-C.sub.s or C.sub.2) symmetry and such that the substituents define the orientation of the growing polymer chain end and resulting in tactioselectivity of successive monomer additions. Methods are also described for the preparation and use of these unique catalysts.

Abstract: Disclosed is a process for producing a polymer of an unsaturated carboxylic acid or a derivative thereof, the process comprising polymerizing an unsaturated carboxylic acid or a derivative thereof in a water-soluble organic solvent-water mixture in the presence of at least one polymerization catalyst selected from the group consisting of a metal compound of the formulaL.sub.p.M.X.sub.q ( 1)wherein M is Ti, Zr, Hf or V, L is cyclopentazienyl, indenyl, fluorenyl or a derivative of these, X is halo, H, lower alkyl, lower alkoxyl, aryloxy, phenyl or benzyl, p and q each represents an integer including 0 and p+q is equal to the valence of M, and a metal compound of the formulaR.M.Y.sub.r ( 2)wherein M is defined above, R is a group formed by bonding, via a lower alkylene or di(lower alkyl)silylene group, two groups being cyclopentadienyl, indenyl, fluorenyl or a derivative of these, Y is halo, H, lower alkyl, lower alkoxyl, aryloxy, phenyl or benzyl, r is equal to the valence number of M minus 2.

Abstract: An optical material contains a photochromic compound which is expressed in the following general formula (I): ##STR1## where A represents an oxygen atom, a nitrogen atom, or a substituted nitrogen atom, B represents a thiophene ring, benzothiophene ring, pyrrole ring or indole ring, R.sub.1 represents a methyl group, an alkoxy group or a perfluoroalkyl group, R.sub.2 to R.sub.7 represent a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group and the like respectively. This photochromic compound may be bonded with a polymer as a side chain in the position of A.

Abstract: A method for producing stabilized polymers, exhibiting enhanced thermal stability, which comprises polymerizing a mixture comprising: a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, preferably a long chain (C.sub.3 -C.sub.20) allyl-containing ether group on the hydroxyl group; and one or monomers selected from methacrylate ester monomers, acrylate ester monomers, acrylamide monomers and styrene monomers, in amounts sufficient to produce a polymer exhibiting enhanced thermal stability. Polymers having enhanced thermal stability are obtained using a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, as a novel stabilization crosslinking agent.

Abstract: The process according to the invention is a process for the production of aligned, ferroelectrically or ferrielectrically or antiferroelectrically ordered materials which solidify in a glass-like manner. In these layer structures with polar order, the molecular dipole moments are uncompensated, partially compensated or fully compensated, so that a dipole moment corresponding to the degree of compensation, acts externally.

Abstract: Olefins are polymerized by the use of catalysts comprising biscyclopentadienyl, Group 4 transition metal complexes formed with conjugated dienes wherein the diene is bound to the transition metal either in the form of a .sigma.-complex or a .pi.-complex in combination with activating cocatalysts.

Abstract: A method for producing stabilized polymers, exhibiting enhanced thermal stability, which comprises polymerizing a mixture comprising: a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, preferably a long chain (C.sub.3 -C.sub.20) allyl-containing ether group on the hydroxyl group; and one or monomers selected from methacrylate ester monomers, acrylate ester monomers, acrylamide monomers and styrene monomers, in amounts sufficient to produce a polymer exhibiting enhanced thermal stability. Polymers having enhanced thermal stability are obtained using a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, as a novel stabilization crosslinking agent.

Abstract: This invention is for a catalyst system for polymerization of olefins using an ionic metallocene catalyst with aluminum alkyl. The metallocene catalyst is an ion pair formed from a neutral metallocene compound and an ionizing compound. The invention can be used in any method of producing ionic metallocene catalysts. Use of aluminum alkyl with an ionic metallocene catalyst eliminates the need for using methylaluminoxane (MAO). Catalysts produced by the method of this invention have high activity. The invention reduces catalyst poisons which cause low activity, no activity or uncontrolled polymerizations. Polymerization using this catalyst system are reproducible and controllable.

Abstract: The invention relates to a metallocene compound of the formula I ##STR1## where the two indenyl ligands have substitution patterns different from one another. The metallocene compound can be used as catalyst component for olefin polymerization.

Abstract: Disclosed is a method for obtaining composite material comprising a network of cross-linked polymer and fluid molecules. Such materials, using molecules of liquid crystal, are notably used in display screens. The originality of the disclosure lies in the drying, in supercritical phase, of the molecules that have enabled the preparation of the network. Generally, the operation of evaporation drying of the solvent leads to a deterioration of the network structure. With the method according to the invention, the network keeps its initial structure, making it possible to obtain high performance characteristics in scattering of light. Application to display screens and protection for detectors.No abstract figure.

Abstract: Phosphonic telomer intermediates for preparing the telomers of U.S. Pat. No. 5,376,731 may be produced by an aqueous process comprising (a) reacting hypophosphorous acid with a carbonyl compound which is preferably an aldehyde, a ketone or an imine, and (b) reacting the product of (a) with an olefinic reactant or reactants in the presence of a suitable initiator especially a free radical initiator. The telomer intermediates are themselves useful as scale inhibitors in aqueous systems.

Abstract: A method of preparing microcapsules includes the steps of preparing a block polymer having a block of a hydrophobic repeating unit and a block of a hydrophilic repeating unit, and employing the block polymer as a protective colloid for preparing microcapsules in a nonaqueous medium by interfacial polymerization.

Abstract: A retardation film comprising a polymerized liquid crystal oligomer having positive intrinsic birefringence, also having a glass transition temperature of 50.degree. C. or below and showing nematic or smectic phase, characterized in that the optical axis of the film lies in the film plane, that the value of retardation (product of anisotropy of refractive index .DELTA.n of said film and film thickness d) at 30.degree. C. is 100 nm or above, and that the ratio of the value of retardation at 80.degree. C. to that at 30.degree. C. is 0.95-0.5, allows proper adjustment of the rate of change with temperature in accordance with the rate of change with temperature of the liquid crystal cell used in combination with the film, and can provide liquid crystal display devices showing excellent display performance at high temperatures.

Abstract: The present invention discloses a polycyclic norbornene-based ring-opening polymer which comprises(A) 90-5% by mol of a repeating unit represented by the following formula [I] or the alkyl-substituted derivative thereof, and(B) 10-95% by mol of at least one repeating unit selected from a repeating unit represented by the following formula [II], the alkyl-substituted derivative thereof, a repeating unit represented by the following formula [III], the alkyl-substituted derivative thereof, or the alkylidene-substituted derivative thereof, and which has an intrinsic viscosity [.eta.] of 0.01-20 dl/g as determined in toluene at 25.degree. C., the hydrogenation products thereof, and a process for production thereof ##STR1## wherein ------ denotes a single bond or a double bond.

Abstract: This invention is directed to novel catalysts the structure and activity of which can be controlled to produce a wide range of alpha olefin polymers and co-polymers, and preferably for the production of stereoblock poly alpha olefins comprising a wide range of preselected amorphous and crystalline segments for precise control of the physical properties thereof, principally elastomeric thermoplastic properties. More specifically, this invention is directed to novel catalysts and catalysts systems for producing stereoblock polypropylene comprising alternating isotactic and atactic diastereosequences, which result in a wide range of elastomeric properties. The amount and numbers of crystalline sections, the isotactic pentad content, the number and length of intermediate atactic chains and overall molecular weight are all controllable by the steric structure of the catalysts and the process conditions.