Abstract: The present invention provides a method of making barium titanate powder. The method includes adding barium acetate to a solution of oxalic acid and titanium oxychloride to form barium titanyl oxalate and then calcining the barium titanyl oxalate to obtain barium titanate powder.

Abstract: The synthesis, processing and test of improved lead zirconate titanate (PZT) precursor materials useful for making bulk, thick films and thin films of PZT are provided. PZT is an oxide ceramic extensively used for its piezoelectric properties. A variety of devices made from piezoelectric PZT are known. A soluble spin-on precursor is provided that is compatible with and soluble in non-toxic and environmentally benign solvents (including water), has high stability and long shelf life, and provides high quality PZT films.

Abstract: Titanium complex having general formula (I) (RCOO)nTiXp wherein R is a monofunctional hydrocarbyl radical having from 1 to 20 carbon atoms and a number of halogen atoms, selected from fluorine, chlorine and bromine, preferably chlorine, ranging from 1 to 6; X is chlorine, bromine or a beta-dicarbonyl group such as acetylacetone (AcAc), formylacetone, benzoylacetone, dibenzoylmethane; p+n=2, 3, 4, preferably p+n=3; n is greater than or equal to 1. The preparation of the above complex and its use in the co- and ter-polymerization of ?-olefins, are also described.

Abstract: The present invention relates to a catalyst for preparing vinyl aromatic polymer and styrene polymerization using the same, and particularly to a transition metal half metallocene catalyst with a novel structure for preparing syndiotactic styrene polymer having high activity, superior stereoregularity, high melting point and various molecular weight distributions and a process for preparing styrene polymer using the same. The present invention provides a multinuclear half metallocene compound in which two or more of transition metals of groups 3 to 10 on periodic table are connected through bridge ligand simultaneously containing ?-ligand cycloalkandienyl group and ?-ligand functional group and its preparation, and a process for preparing styrene polymer using the compound as a catalyst. Polymers with various molecular weight distributions as well as vinyl aromatic polymer having predominant syndiotactic structure can be prepared with high activity using the multinuclear half metallocene catalyst.

Abstract: A multi-functional photoinitiator of formula (I) R1m—Q—(A1—PI)n??(I) wherein Q is a heteroatom selected from Si, Ti, Zr and Sn or any two independently selected such heteroatoms linked by a covalent bond or a by C1-16 (preferably C1-9) alkylene group, n is at least 2 and n+m=the functionality of Q, each R1 is the same or different and is a non-photoinitiator group; each group PI is the same or different and is a photoinitiator group. Each —A1— is the same or different and is selected from linking groups of formula —(A2)p—Z— wherein p has an average of from 1 to 10, preferably from 3 to 5 and the groups —A2— are either (a) each independently selected from C2-4 alkyleneoxy groups; or (b) each independently selected from groups of formula —O—(CH2)qCO— wherein q is from 3 to 5, and Z is selected from —O—, —S— and —NR6— where R6 is C1-6 alkyl.

Abstract: A glass coating agent is provided which is adapted for application onto the surface of a glass substrate and, upon heating, forms a metal oxide layer. The glass coating agent comprises a metallic compound represented by formula (I): R1k-mM(OCOR2)m??(I) wherein M represents a metal atom selected from the group consisting of tin, titanium, indium, silicon, zirconium, and aluminum; R1 represents a straight-chain, branched, or cyclic alkyl, alkenyl, or aryl group having 1 to 6 carbon atoms; R2 represents a branched alkyl group having 3 to 6 carbon atoms; k is a number representing the valence of the metal atom M; and m is a number of 1 to k. Further, there is provided a glass coating method using the glass coating agent. According to the glass coating agent, a metal oxide layer having excellent fastness properties and free from haze can be formed on the surface of glass substrates. According to the glass coating method, the metal oxide layer can be continuously and stably produced.

Abstract: A stabilized aluminum/zirconium/glycine salt comprising a Betaine of Formula I as additive: 1

Abstract: Enclosed are high refractive index and low birefringence organic/inorganic hybrid materials useful for optical applications. They are prepared from solventless metal aliphatic acryl alkoxides. The metal acryl alkoxides are synthesized from exchanging acryl alcohol with metal alkoxides, and are hydrolyzed into metal oxide nanoparticles and are well dispersed in the acrylate matrix. Then they are polymerized into organic/inorganic hybrid materials containing metal oxide in polyacrylate.

Abstract: An organometallic composition is described which comprises a complex of at least one orthoester of a metal having a formula M(ROAcAc)x(OR′)y in which M is selected from the group consisting of titanium, zirconium and hafnium; ROAcAc denotes an ester of an alochol ROH, in which R comprises an (optionally substituted) C1-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, with acetoacetic acid; OR′ is the residue of an alcohol R′OH in which R′ comprises an (optionally substituted) C7-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, and x and y are each in the range 1-3. The composition is useful as a curing agent for polyurethanes used in various applications.

Abstract: Chelating monomers and fluoride-releasing compositions are disclosed that may be incorporated into dental composite restorative materials or other dental materials, to produce materials with high fluoride release rates, and high fluoride recharge capability. Such resins may be used in dental restorative materials to help reduce the level of dental caries in patients, particularly the level of caries occurring on the margins of the restorative materials.

Abstract: A liquid precursor for forming a transparent metal oxide thin film comprises a first organic precursor compound. In one embodiment, the liquid precursor is for making a conductive thin film. In this embodiment, the liquid precursor contains a first metal from the group including tin, antimony, and indium dissolved in an organic solvent. The liquid precursor preferably comprises a second organic precursor compound containing a second metal from the same group. Also, the liquid precursor preferably comprises an organic dopant precursor compound containing a metal selected from the group including niobium, tantalum, bismuth, cerium, yttrium, titanium, zirconium, hafnium, silicon, aluminum, zinc and magnesium. Liquid precursors containing a plurality of metals have a longer shelf life. The addition of an organic dopant precursor compound containing a metal, such as niobium, tantalum or bismuth, to the liquid precursor enhances control of the conductivity of the resulting transparent conductor.

Abstract: Novel ligated compounds of tin, titanium, and zinc are useful as metal oxide CVD precursor compounds without the detriments of extreme reactivity yet maintaining the ability to produce high quality metal oxide coating by contact with heated substrates.

Abstract: The invention relates to a process for synthesizing an ionic metal complex represented by the general formula (1) or (5). This process includes reacting in an organic solvent a compound (corresponding to ligand of the complex) represented by the general formula (2) or (6) with a halogen-containing compound represented by the general formula (3) or (4), in the presence of a reaction aid containing an element selected from the group consisting of elements of groups 1-4 and 11-14 of the periodic table. It is possible by this process to easily and efficiently synthesize the ionic metal complex, which can be used as a supporting electrolyte for electrochemical devices, a polymerization catalyst of polyolefins and so forth, or a catalyst for organic synthesis.

Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.

Abstract: The invention relates to a process for preparing water-soluble organotin catalysts by contacting organotin compounds with polyelectrolytes and, optionally, subsequently removing the water.

Abstract: An organometallic composition is described which comprises a complex of at least one orthoester of a metal having a formula M(ROAcAc)x(OR′)y in which M is selected from the group consisting of titanium, zirconium and hafnium; ROAcAc denotes an ester of an alochol ROH, in which R comprises an (optionally substituted) C1-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, with acetoacetic acid; OR′ is the residue of an alcohol R′OH in which R′ comprises an (optionally substituted) C7-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, and x and y are each in the range 1-3. The composition is useful as a curing agent for polyurethanes used in various applications.

Abstract: Enclosed are high refractive index and low birefringence organic/inorganic hybrid materials useful for optical applications. They are prepared from solventless metal aliphatic acryl alkoxides. The metal acryl alkoxides are synthesized from exchanging acryl alcohol with metal alkoxides, and are hydrolyzed into metal oxide nanoparticles and are well dispersed in the acrylate matrix. Then they are polymerized into organic/inorganic hybrid materials containing metal oxide in polyacrylate.

Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.

Abstract: A liquid precursor for forming a transparent metal oxide thin film comprises a first organic precursor compound. In one embodiment, the liquid precursor is for making a conductive thin film. In this embodiment, the liquid precursor contains a first metal from the group including tin, antimony, and indium dissolved in an organic solvent. The liquid precursor preferably comprises a second organic precursor compound containing a second metal from the same group. Also, the liquid precursor preferably comprises an organic dopant precursor compound containing a metal selected from the group including niobium, tantalum, bismuth, cerium, yttrium, titanium, zirconium, hafnium, silicon, aluminum, zinc and magnesium. Liquid precursors containing a plurality of metals have a longer shelf life. The addition of an organic dopant precursor compound containing a metal, such as niobium, tantalum or bismuth, to the liquid precursor enhances control of the conductivity of the resulting transparent conductor.

Abstract: The present invention relates to titanate compounds of the formula wherein R is selected from the group consisting of alkylene groups having from 1 to 15 carbon atoms and arylene and alkyl substituted arylene groups having from 6 to 10 carbon atoms and x is an integer of from 2 to 8.

Abstract: The present invention is directed to the synthesis, processing and test of improved spin-on precursor materials comprising at least one Group II metal and at least one Group IV or Group V metal, useful for making thin oxide films, useful, for example, in various electronic devices, such as ferroelectric devices. For example, barium strontium titanate spin-on precursor materials are useful for making thin films of barium strontium titanate (BST) for, e.g., ferroelectric capacitors. A method is provided for fabricating electronic devices employing such Group II-Group IV (or V) oxides as the active device, using polyether acids. The method comprises: (a) providing a substrate; (b) forming a bottom electrode on the substrate; (c) depositing a solution comprising polyether acid salts of the Group II and Group IV or Group V metal ions; (d) forming the oxide film from the solution; and (e) forming a top electrode on the oxide film.

Abstract: Metal acid salt complexes are provided comprising (1) a first metal ion consisting essentially of bismuth, and optionally, at least one second metal ion selected from the group consisting of barium, calcium, strontium, lead, titanium, tantalum, and niobium, and (2) a polyether acid. The metal acid salt complexes are prepared by combining (1) bismuth ion, and optionally, at least one second metal ion and (2) at least one of a polyether acid and a polyether acid anhydride prepared from the polyether acid. In particular, the use of a mixture of bismuth, strontium, and niobium and/or tantalum salts of the hydrophilic acid 3,6-dioxaheptanoic acid salt is described for production of ceramic thin films, such as for use in ferroelectric devices, using non-toxic solvents. As a consequence, improved electronic devices are formed from less toxic and easier handled precursors and solvents.

Abstract: An organometallic composition comprises a complex of at least one metal selected from the group consisting of titanium, zirconium and hafnium and an acetoacetate ester in which the molar ratio of Ti or Hf to acetoacetate ester is in the range 1:2.5 to 1:10 or the molar ratio of Zr to acetoacetate ester is in the range 1:4.5 to 1:10 and said acetoacetate ester is an ester of an alcohol containing 1 to 6 carbon atoms. The organometallic composition is useful in polyisocyanate compositions, particularly those used as binders for lignocellulosic materials, and polyisocyanate compositions containing the organometallic compositions of the invention have good stability on storage.

Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.

Abstract: Disclosed is an olefin polymerization catalyst comprising: a transition metal compound comprising one transition metal selected from the group consisting of Ti, Zr and Hf, and at least two ligands, wherein one ligand is a group having a cyclopentadienyl skeleton, and the remaining at least one ligand is a monovalent, bidentate, anionic chelating ligand having two coordinating atoms each coordinated to the transition metal, one of which atoms is selected from the group consisting of O, S, Se and Te, and the other of which atoms is selected from the group consisting of N, S, Se and Te, and wherein one of the remaining at least one ligand is optionally bonded to the group having a cyclopentadienyl skeleton through a bridging group. Also disclosed is a method for efficiently producing an olefin homopolymer or olefin copolymer by using this catalyst.

Abstract: Cascade polymers, containing complex-forming ligands, optionally at least five ions of an element of atomic numbers 21-29, 39, 42, 44 or 57-83, as well as, if desired, cations of inorganic and/or organic bases, amino acids or amino acid amides, are valuable complexing compounds and complexes for diagnostics and therapy.

Abstract: In one embodiment, the present invention relates to metal oxide sols comprising a liquid and a polycondensation product of about 2 to about 5,000 monomers of a partially hydrolyzed chelated metal oxide precursor. In another embodiment, the present invention relates to a process for making a metal oxide sol comprising contacting a metal oxide precursor with a multifunctional compound in a liquid to provide a chelated metal oxide precursor; contacting the chelated metal oxide precursor with a hydrolyzing agent to provide partially hydrolyzed chelated metal oxide precursor monomers; and permitting the partially hydrolyzed chelated metal oxide precursor monomers to polycondense thereby forming a metal oxide sol.

Abstract: Compounds which can chelate paramagnetic bi- and trivalent metal ions, their chelates with said metal ions and their use as contrast agents in magnetic resonance imaging (MRI), the compounds having formula (I) ##STR1## wherein R is a --(CH.sub.2).sub.m --O--R.sub.2 group or hydrogen,R.sub.2 is a (C.sub.6 -C.sub.10) aryl, or an alkyl(C.sub.1 -C.sub.5)-aryl(C.sub.6 -C.sub.10) group, substituted or not by a group L corresponding to a OH group or a OR.sub.3 group, wherein R.sub.3 is a linear or branched (C.sub.1 -C.sub.5) alkyl group; or L is NH.sub.2, halogen, COOH or CONR.sub.4 R.sub.5 wherein R.sub.4 and R.sub.5 are independently hydrogen, or a linear or branched (C.sub.1 -C.sub.5) alkyl which can be substituted by 1-6 hydroxy groups and/or 1-6 alkoxy groups,R.sub.1 can have the same meanings as R, independently from it, except for hydrogen,Z is independently OH or OR.sub.6, or NR.sub.4 R.sub.5 wherein R.sub.4 and R.sub.5 are as previously defined, and R.sub.6 is a (C.sub.1 -C.sub.

Abstract: A catalyst composition for the polymerization of olefins is provided, comprising a bis(hydroxy aromatic nitrogen ligand) transition metal catalyst precursor and an activating cocatalyst.

Abstract: A process for the production of a catalyst precursor comprising reacting (a) a metallocene dihalide; (b) a compound of the formula: ##STR1## wherein each Q is the same or different and is independently selected from the group consisting of O, NR, CR.sub.2, and S; E is either C or S; Z is selected from the group consisting of --OR, --NR.sub.2, --CR.sub.3, --SR, --SiR.sub.3, --PR.sub.2, --H, and a substituted or unsubstituted aryl group; and each R is independently a group containing carbon, silicon, nitrogen, oxygen, and/or phosphorus; and (c) a trialkylamine.

Abstract: The invention provides, as contrast signal generators in MR imaging of the digestive tract, paramagnetic metal chelates of novel acrylic compounds of formula C(R.sup.1 R.sup.2).dbd.CR.sup.3 --CO--Z--A (1) and/or C(R.sup.1 R.sup.2).dbd.CR.sup.3 --O--Z--A--Z--CO--CR.sup.3 .dbd.C(R.sup.1 R.sup.2) (2) in monomer, oligomer, homopolymer and copolymer forms, in which the R.sup.1, R.sup.2 and R.sup.3 represent H or saturated or unsaturated C.sub.1-10 aliphatic radicals optionally substituted by one or more OH groups; Z is a covalent bond or a linker spacer and A is a moiety capable of fixing a paramagnetic metal by chelation. Compounds of type (1) useful in the present invention are, for instance the polyalkylene-aminopolycaboxylic acids such as NTA, EDTA, DTPA, DOTA and like structures, possibly involving additional substituents; an example is the compound BOPTA which is a DTPA derivative carrying a benzyloxypropyl group.

Abstract: Novel metal acid salt complexes are provided comprising (1) a metal selected from Group IV and Group V metals and (2) a polyether acid, along with a process for making the salt complexes. The process comprises: (a) preparing a polyether acid anhydride from the corresponding polyether acid; and (b) combining a metal alkoxide containing the Group IV or Group V metal with the polyether acid anhydride to form the metal acid salt complex. The resulting Group IV and Group V metal acid salt complexes enable the production of improved thin film, thick film, and bulk ceramic metal oxides and mixed metal oxides for a number of applications, including ferroelectric, electrooptic, paraelectric, and piezoelectric devices, using liquid soluble precursors which are soluble in far less toxic solvents than in the prior art. The soluble ceramic precursors may also be used as reactive binders and shape-forming aids in conventional ceramic processing.

Abstract: Cascade polymers, containing complex-forming ligands, optionally at least five ions of an element of atomic numbers 21-29, 39, 42, 44 or 57-83, as well as, if desired, cations of inorganic and/or organic bases, amino acids or amino acid amides, are valuable complexing compounds and complexes for diagnostics and therapy.

Abstract: The invention relates to a process for the production of metal-complex carboxylic acid amides, characterized in that a metal-complex carboxylic acid mixture that consists of the metal-complex carboxylic acid and at least one solubilizing substance in dimethyl sulfoxide (DMSO) is pretreated with a dehydrating reagent, optionally with the addition of a coupling adjuvant, and is then reacted with an amine of general formula IA(NH.sub.2).sub.n (I),in whichA stands for the radical of a natural or synthetic amine, andn stands for numbers 1 to 100.

Abstract: Disclosed is a process for producing novel optically active titanium alkoxide complexes which are excellent in catalytic activity and enantio-selectivity in carbon-carbon bond forming reactions (for example, Ene reaction, hetero-Diels-Alder reaction, Aldol reaction) and have high stability. The present process comprises reacting (R),(S),(RS)-catalysts or mixtures thereof selected from among optically active or racemic titanium alkoxide complexes represented by the following general formula (1), etc.: ##STR1## wherein R.sup.1 represents a methyl, lower alkoxy or trihalogeno group; R.sup.2 represents a hydrogen or halogen atom; R.sup.3 represents a hydrogen atom or a methyl group; and R.sup.4 represents a lower alkyl group, or R.sup.1 and R.sup.2 may form together a cyclo ring;with chiral activators [(R),(S),(RS)-diols or mixtures thereof, but excluding reactions between a racemic modification and another racemic modification] to thereby activate exclusively one of the enantiomers.

Abstract: These compounds are denoted by the formula (I): ##STR1## in which R denotes a tert-butyl, tert-amyl or 2-ethylhexyl radical. To prepare them, methacrylic acid is reacted with a tetraalkoxytitanium Ti(OR).sub.4, where R=isopropyl or tert-butyl, to obtain a corresponding compound (I), or with Ti(OR) (OtAm).sub.3, where R=isopropyl or tert-butyl and tAm=tert-amyl, to obtain a compound (I) with R=tert-amyl, the compounds (I) with R=isopropyl or tert-butyl furthermore denoting intermediate synthesis products which can be reacted with tert-amyl alcohol or with 2-ethylhexanol, to obtain a compound (I) in which R denotes tert-amyl or 2-ethylhexyl respectively.

Abstract: Metal compound of formula [I] which is excellent in charge control or charge-enhancing property, and toner for developing electrostatic images and powdery paint for electrostatic painting incorporating thereof: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent a hydrogen, a linear or branched alkyl group, or a linear or branched unsaturated alkyl group; R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, and R.sup.3 and R.sup.4 may bind together to form an aromatic or aliphatic ring which may have one or more substituents of a linear or branched alkyl group, or a linear or branched unsaturated alkyl group; M represents a metal; m represents an integer of 3 or more; n represents an integer of 2 or more.

Abstract: An ultrafine titanium dioxide powder is disclosed that can be produced by hydrothermal treating an amino titanium oxalate composition. Ultrafine titanium dioxide powders are useful in cosmetic and other applications for controlling exposure to ultraviolet (UV) light.

Abstract: Disclosed are linear and cross-linked polymers suitable for use as a contrast agent for magnetic resonance imaging containing units comprising the residue of a poly(amine) moiety linked to a chelating agent and to one or more pendant (poly)alkylene oxides.

Abstract: There are provided polychelants and their metal chelates which are useful in diagnostic imaging and in radiotherapy and which comprise a plurality of macrocyclic chelant moieties, e.g. DOTA residues, conjugated to a dendritic polyamine backbone molecule, e.g. a starburst dendrimer. To produce a site-specific polychelate, one or more of the macrocyclic chelant carrying backbone molecules may be conjugated to a site-directed macromolecule, e.g. a protein.

Abstract: The present invention relates to novel organometallic compounds of the general formula M(OH).sub.y (A).sub.V (B).sub.z, wherein M is Ti(IV), Nb(V) or Ta(V) and x +y+z=5 for Nb and Ta and x+y+z=4 for Ti and A means an alkoxide ligand of diols and/or glycol monoethers and B is a carboxylate ligand of fatty acids of a carbon chain length of C.sub.6 -C.sub.19, and to processes for the production and use thereof.

Abstract: The invention relates to new, multiply substituted diethylenetriaminepentaacetic acid derivatives, their complexes and complex salts, that contain an element of atomic numbers 20-32, 39-51 or 57-83, pharmaceutical agents that contain these compounds, their use as contrast media and antidotes, and process for the production of pharmaceutical agents.

Abstract: Basic zirconium carboxylates of branched chain aliphatic monocarboxylic acids having 5 to 10 carbon atoms are disclosed. The carboxylates may be used, inter alia, as driers for paints and inks.

Abstract: A metal source reagent liquid solution, comprising: (i) at least one metal coordination complex including a metal to which is coordinatively bound at least one ligand in a stable complex, wherein the ligand is selected from the group consisting of: .beta.-diketonates, .beta.-ketoiminates, .beta.-diiminates, C.sub.1 -C.sub.8 alkyl, C.sub.2 -C.sub.10 alkenyl, C.sub.2 -C.sub.15 cycloalkenyl, C.sub.6 -C.sub.10 aryl, C.sub.1 -C.sub.8 alkoxy, and fluorinated derivatives thereof; and (ii) a solvent for the metal coordination complex. The solutions are usefully employed for chemical vapor deposition of metals from the metal coordination complexes, such as Mg, Ca, Sr, Ba, Sc, Y, La, Ce, Ti, Zr, Hf, Pr, V, Nb, Ta, Nd, Cr, W, Pm, Mn, Re, Sm, Fe, Ru, Eu, Co, Rh, Ir, Gd, Ni, Tb, Cu, Dy, Ho, Al, Tl, Er, Sn, Pb, Tm, Bi, and/or Yb. The solvent may comprise glyme solvents, alkanols, organic ethers, aliphatic hydrocarbons, and/or aromatic hydrocarbons.

Abstract: The present invention relates to water-soluble, lipophilic contrast-enhancing agents, pharmaceutical compositions thereof and methods for diagnostic analysis, particularly NMR or MRI analysis using these contrast-enhancing agents. The water-soluble, lipophilic contrast-enhancing agents are chelates of a paramagnetic, ferromagnetic or diamagnetic metal ion(s) complexed with completing acids which contain at least one short-chain fatty acyl moiety having from about 0 to about 6 carbon atoms in its structure.

Abstract: A contrast enhancing agent for magnetic resonance images having a chelating agent, which can be bound to metals having at least one unpaired electron. Examples of such chelating agents include 3,6,9-tris(carboxymethyl)-1, 11-bis(dimethylamine)-3,6,9-triazaundecane; 3,6,9-tris(carboxymethyl)-1, 11-bis(diethanolamino) 3,6,9-triazaundecane; 3,6,9-tris(carboxymethyl)-1, 11-bis(tris(hydroymethyl) aminomethane)-3,6,9-triazaundecane; 3,6-bis(carboxymethyl-1,8-bis(N-carboxymethylglucosamino)-3,6-diazoctane; DTPA-bis(galactosamide), DTPA-Bis(glucosamide), DTPA-Bis(pyridoxamide), and poly-(DTPA-ethylenediamide).

Abstract: Compounds of general Formula I ##STR1## wherein Z.sup.1 and Z.sup.2 in each case independently mean the residue--(CH.sub.2).sub.m --(C.sub.6 H.sub.4).sub.q --(O).sub.k --(CH.sub.2).sub.n --(C.sub.6 H.sub.4).sub.l --(O).sub.r --R,whereinm and n means the numbers 0-20,k, l, q and r means the numbers 0 and 1, andR means a hydrogen atom, an optionally OR.sup.1 -substituted C.sub.1 -C.sub.6 -alkyl residue, or a CH.sub.2 COOR.sup.1 group with R.sup.1 meaning a hydrogen atom, a C.sub.1 -C.sub.6 -alkyl residue, or a benzyl group,with the proviso that at least two substituents X stand for a metal ion equivalent; that one of the substituents Z.sup.1 and Z.sup.2 stands for a hydrogen and the other is not H; that--if n and l each means the number 0--k and r do not simultaneously mean the number 1; that --(O).sub.r --R is not --OH; and that Z.sup.1 and Z.sup.2 are not --CH.sub.2 --C.sub.6 H.sub.4 --O--CH.sub.2 --COOCH.sub.2 C.sub.6 H.sub.5 or --CH.sub.2 --C.sub.6 H.sub.4 --O--(CH.sub.2).sub.5 --COOCH.sub.2 C.sub.6 H.sub.

Abstract: A method of formulating a zirconium lactate compound is accomplished by combining in solution lactic acid or a lactate salt with zirconium carbonate. The reacting solution forms zirconium lactate and carbon dioxide which is evolved as a gas from the solution. This eliminates the need to filter or wash the zirconium lactate in order to remove undesirable by-products. The zirconium lactate can be used as a crosslinking agent for crosslinking aqueous polymer gels used in such things as fracturing fluids for fracturing subterranean formations of oil and gas wells.

Abstract: Scavengers for removing acidic or corrosive gaseous components from semiconductor process effluents comprising a metallic macromer comprising a coordinated complex of (i) metal coordination atoms linked to (ii) oxomeric moieties selected from the group consisting of carbonate, sulfite, carboxylate, and silicate, and methods for synthesizing these scavengers. A method for cleaning an exhaust gas containing least one corrosive or acidic gaseous component selected from the group consisting of hydrogen halide, chlorine, boron trihalide, thionyl chloride, and tungsten hexafluoride, which comprises contacting the exhaust gas with the metallic macromer scavenger compositions.

Abstract: Novel complexes of paramagnetic ions and compounds bearing long acyl chains have been synthesized as magnetic resonance imaging contrast agents. These novel liposoluble contrast agents may be administered alone, or with lipids, suspending agents or other additives. The lipids may be in the form of liposomes, micelles or lipid emulsions. The contrast agents of the invention have particular use in magnetic resonance imaging of the liver, blood pool and reticuloendothelial system.