Prepreg precursors and other normally non-flowable resinous semi-solid or viscous liquid polyimide precursor compositions often need to be transformed into free-flowable liquids without dilution and without causing changes in their chemical composition. Such compositions are composed of (a) a diester of an aromatic tetracarboxylic acid, (b) an aromatic diamine, (c) a polyamic acid producible from (i) an aromatic diamine and (ii) a dianhydride of an aromatic tetracarboxylic acid, and (d) an inert...

A thickened cleaning composition for laundry products incorporates low levels of a fluorescent whitening agent or dye, a surfactant, an acidic pH adjusting agent and an insoluble peracid precursor. At the acidic pH, the fluorescent whitening agent precipitates as a colloidal particle, and is stabilized by associating with the surfactant, resulting in thickening. The precursor is stably suspended in its inactive form in the thickener, and provides oxidizing power as the corresponding peracid is f...

A photosensitive polyimide precursor composed of the structural units (A) represented by the following general formula (I) and the structural units (B) represented by the following general formula (II), in which the ratio of the molar quantity of the structural units (A) to the sum of the molar quantity of the structural units (A) and that of the structural units (B) is 0.01 or greater, and having a viscosity of 100 cP or above as measured at 25.degree. C. in the state of a 10% by weight solutio...

This invention relates to organometallic precursor compounds represented by the formula (L)M(L').sub.2(NO) wherein M is a Group 6 metal, L is a substituted or unsubstituted anionic ligand and L' is the same or different and is a .pi. acceptor ligand, a process for producing the organometallic precursor compounds, and a method for producing a film, coating or powder from the organometallic precursor compounds.

The present invention provides a planographic printing plate precursor including a support and a positive recording layer formed on the support and containing: (A) a polymer having a structural unit represented by the following general formula (1), (B) a photo-thermal converting agent, and (C) an amino compound having a methylol group or an alkoxymethyl group; and a positive recording layer whose solubility in an alkaline developer is improved by exposure to light or by heating. ##STR00001## In ...

The present invention relates to a positive photosensitive resin precursor composition which exhibits good storage stability after exposure.A photosensitive resin precursor composition comprises (a) a polymer essentially composed of a structural unit expressed by formula (1); (b) at least two photo acid generators; and (c) a compound having an alkoxymethyl group: ##STR00001## wherein R.sup.1 represents an organic group with a valence of 2 to 8, having at least two carbon atoms; R.sup.2 represent...

A method for precursor delivery includes transferring a precursor vapor from a precursor vaporization system to an intermediate precursor chamber, collecting the precursor vapor in the intermediate precursor chamber, flowing a process gas containing the collected precursor vapor to a process chamber, and exposing a substrate in the process chamber to the process gas to deposit a layer including at least one element from the precursor vapor on the substrate.

Stable, fluid polyvinyl alcohol-containing microgels in water having a Brookfield viscosity of 1.15 to 1000 centipoises may be prepared more economically from a dry blend which comprises (A) a polymer mixture consisting of at least about 0.5% by weight of polyvinyl alcohol and one or more polysaccharide selected from the group consisting of up to about 99.5% by weight of starch and up to about 33% by weight of sodium carboxymethylcellulose, said polyvinyl alcohol having a Hoeppler viscosity of a...

This invention provides an APP-cleaving protein and related nucleic acid compounds. The invention also provides methods, materials and assays. The compounds of this invention will further the characterization of neurological diseases such as Alzheimer's disease and Down's syndrome.

A process for the preparation of a precursor metallic powder composition for use in the subsequent formation of a superconductor. The process comprises the steps of providing an electrodeposition bath comprising an electrolyte medium and a cathode substrate electrode, and providing to the bath one or more soluble salts of one or more respective metals which are capable of exhibiting superconductor properties upon subsequent appropriate treatment. The bath is continually energized to cause the me...