A polymer includes a repeating unit represented by at least one of Formula 1a or Formula 1b: ##STR00001## wherein, in Formulae 1a or 1b, CY.sub.1 is a group represented by at least one of Formula 1-2 or Formula 1-4, CY.sub.2 is a group represented by Formula 1-3, and L.sub.1, L.sub.2, a1, and a2 are defined the same as in the specification, and ##STR00002## in Formulae 1-2, Formula 1-3, or 1-4, X, Y, R.sub.1, R.sub.2, R.sub.11 to R.sub.14, b1, b2, R.sub.21, R.sub.22, b21, b22, Z.sub.1, Z.sub.2, c1, and c2 are defined the same as in the specification.

A high temperature resistant polyimide film and its preparation method. The present invention relates to a polyimide film and its preparation method and solves the problems of honeycomb's and skin panel's core adhesive-polyimide film with insufficient heat resistance, no climbing of bonding core structure and adhesive fillet formation. The high temperature resistant polyimide film is made by polyimide solution, inorganic filler modifier and interface coupling agent by the steps of: under specific temperature and stirring conditions, adding inorganic filler modifier and interface coupling agent to polyimide solution, stirring to obtain the adhesive agent; filtering and degassing the adhesive agent, casting to a stainless steel drum with carrier cloth and release paper to obtain a self-supporting film; then heating and annealing to obtain the final polyimide film. The present invention is applied to high temperature resistant polyimide film and its preparation method.

Processes for producing ammonium octamolybdate/metal hydroxide complexes include the steps of pre-contacting ammonium dimolybdate and a metal hydroxide, and then contacting molybdenum trioxide, to form the ammonium octamolybdate/metal hydroxide complexes. The resulting complexes contain the metal hydroxide and from 1 to 95 wt. % of ammonium octamolybdate, and generally, at least 80 wt. % of the ammonium octamolybdate in the complex is present in an orthorhombic crystalline form. These ammonium octamolybdate/metal hydroxide complexes can be used as smoke suppressants in polymer compositions, such as PVC-based and epoxy-based formulations.

Synthesis, fabrication, and application of nanocomposite polymers in different form (as membrane/filter coatings, as beads, or as porous sponges) for the removal of microorganisms, heavy metals, organic, and inorganic chemicals from different contaminated water sources.

Examples herein include prosthetic valves, valve leaflets and related methods. In an example, a prosthetic valve is included having a plurality of leaflets. The leaflets can each have a root portion and an edge portion substantially opposite the root portion and movable relative to the root portion. The leaflets can include a fibrous matrix including polymeric fibers having an average diameter of about 10 nanometers to about 10 micrometers. A coating can surround the polymeric fibers within the fibrous matrix. The coating can have a thickness of about 3 to about 30 nanometers. The coating can be formed of a material selected from the group consisting of a metal oxide, a nitride, a carbide, a sulfide, or fluoride. In an example, a method of making a valve is included. Other examples are also included herein.

A rubber composition for a tire containing a cyclopentene ring-opening polymer and a solution polymerized styrene-butadiene rubber. The rubber composition is a cross-linked rubber with excellent wet grip and low heat buildup properties.

A corrosion inhibition composition is disclosed comprising a cerium, a tungstate, a molybdate and silicate compounds. A corrosion inhibition composition is provided comprising a zinc oxide, a zinc hydroxide benzoate, a sodium benzoate, a molybdate and a silicate compound. A corrosion inhibition composition is provided comprising a zinc oxide, a zinc phosphate, a calcium silicate, an aluminum phosphate, a zinc calcium strontium aluminum orthophosphate silicate hydrate, a molybdate, and silicate compounds.

Compositions and methods for producing smoke suppressants are disclosed. The smoke suppressant molecularly encapsulates a naturally-occurring inorganic substrate, such as expanded volcanic ash. These intercalated smoke suppressant compositions have particular utility for smoke suppression in polyvinyl chloride (PVC), both flexible and rigid compounds as well as other polymeric resins and materials.

Sol-gel coating formulations including metal oxide particles such as aluminum oxide, calcium oxide, zinc oxide, magnesium oxide, and molybdenum oxide embedded in a hybrid polymer matrix based on a reacted form of a resin composition containing a tetraalkylorthosilicate, an aminoalkylsilane, a dialkoxysilane, and a silanol terminated polydimethylsiloxane. The sol-gel coating formulations are suitable for applications such as anticorrosive protective coatings of metal substrates (e.g. mild steel). These anticorrosive coated metal substrates are evaluated on their hydrophobicity (water contact angle), surface roughness, mechanical strength (e.g. hardness), adhesiveness to the substrate (e.g. critical load), and anticorrosiveness upon exposure to a saline solution (e.g. impedance value).

The present invention relates to a thermosetting resin composition for coating a metal film having excellent crack resistance and a metal laminate using the same.