An electromagnetic shielding panel (1, 2, 3, 4, P5) incorporates at least two electroconductive coatings (10 and 6, 7,8). In two of the panels (1,2) the coatings are carried on separate sheets of float glass (5,9), one of the coatings 10 being an anti-abrasive coating is on the outermost surface of the glass (9) in the panel arrangement, while the other coating (6,7,8) being a relatively soft abra...

A method of estimating from in situ measurements the adsorptiveness of a rock matrix for organic polymers such as xanthan, which are used in waterflooding for enhanced oil recovery from an oil reservoir, involves injecting water into the rock, and adding a mixture containing two radioactive ions. One ion interacts with the rock (e.g. calcium-45), undergoing ion-exchange, while the other (e.g. chlo...

Apparatus for reading information out of an optical recording medium, such as an optical card, includes a semiconductor laser diode (2) for emitting a laser beam, a collimator lens (3), a beam splitter (5), an objective lens (6), converging lens (7) and a photodetector (8). The laser beam emitted from the laser diode (2) is made incident upon an optical card (1) to be read via the collimator lens ...

Stable, aqueous emulsion copolymers with controllable siloxane crosslinking functionality are provided. These copolymers are prepared by a free radical and cationic initiated emulsion polymerization of at least one free radical initiatable monomer, at least one linear polysiloxane precursor monomer, and at least one polysilane or polysiloxane precursor monomer having both free radical polymerizabl...

Provided are carbon-fiber-reinforced polyimide resin compositions having excellent mechanical strength. The compositions are formed of (a) 5-50 parts by weight of carbon fibers, which have been obtained by coating starting carbon fibers at surfaces thereof with an aromatic polysulfone resin and then heating the thus-coated carbon fibers at 300-400 DEG C, and (b) 95-50 parts by weight of a polyimid...

In a vehicle control apparatus having an automatic gear shift control system for a gear transmission (4) and an automatic clutch control system for a clutch (3), the apparatus comprises a setting device (18) for setting a desired feeling for vehicle drive-off and characteristic curves for controlling the engagement of the clutch (3) and the setting of the gear position in the gear transmission (4)...

Thin films of polyimide having electrical insulation, low thermal expansion, high glass transition temperature, and good ahesion are made by dispersing fine domains of relatively flexible polyimide which is fluorinated in a matrix of relatively rigid polyimide.

The present invention is directed to the manufacture of polyetherimide resin reinforced laminates where their production is via conventional prepreg processing techniques. Broadly, then, the present invention is directed to a method for making a reinforced prepreg of polyetherimide-forming resin. The method comprises forming a solvent solution of a polyetheramide acid and immersing a web of reinfo...

Toughened bismaleimide resin systems capable of preparing carbon fiber reinforced composites having compression after impact strengths of greater than 40 Ksi are prepared from bismaleimide matrix resin systems containing a member of a limited set of thermoplastic polyimides in particulate form.

A modified porous membrane can be produced by dissolving an aromatic polymer having thio ether groups in an organic solvent, forming the film of said polymer from the resultant solution by phase conversion, and oxidizing the formed film. The membrane can effectively be used in various filtration processes including ultrafiltration, reverse osmosis, fine filtration, gas separation, vapor permeation...

The invention provides a coating composition prepared by dissolving a fluorine-type copolymer in an organic solvent, the copolymer comprising: i) about 50 to about 90 mole% of a structural unit represented by the formula a) -CH2-CF2- ii) about 5 to about 30 mole% of a structural unit represented by the formula b) -CF2-CF2- and iii) about 5 to about 30 mole% of a structural unit represented by...

An acrylonitrile polymer film comprising at least 85 wt. % of acrylonitrile, wherein the difference in the value of the second moment of the broad-line NMR spectrum at 20 DEG C. between the film and the starting polymer powder thereof, or the polymer powder formed by dissolving the film and then precipitating the polymer from the solution, is at least 0.3 Gauss2 and the infrared dichroic ratio of...

A differential gear drive having two output shafts each coupled through a differential gear train to a common input gear. The differential gear train comprises an annulus gear engaging the input gear, planet gears and a sun wheel. The output shaft is connected to a planet carrier and the output shaft is connected to the sun wheel. A pair of cam rings are rotatably coupled to the respective output ...

Differential device comprising a housing (1) which carries differential pinions (2) with axis parallel to the axis of the housing (1) and two movement outputs which are each accomplished by a differential side gear (5) and (6). One of the movement outputs is accomplished by means of standard pinions: differential pinion (3) and differential side gear (5), while the other movement output is achieve...

Dimensionally stable alkenyl aromatic thermoplastic synthetic resinous elongate foam bodies having closed noninterconnecting gas-containing cells having an average cell size of 0.05 to 2.0 millimeters, a minimum cross-sectional dimension of at least 0.25 inch, a cross-sectional area of at least 8 square inches, a water vapor permeability not greater than 1.8 per inch, a density of from 1.0 to 5.0 ...

Dimensionally stable alkenyl aromatic thermoplastic synthetic resinous elongate foam bodies having closed noninterconnecting gas-containing cells having an average cell size of 0.05 to 2.0 millimeters, a minimum cross-sectional dimension of at least 0.25 inch, a cross-sectional area of at least 8 square inches, a water vapor permeability not greater than 1.8 per inch, a density of from 1.0 to 5.0 ...

The invention relates to a new terpolymer based on acrylonitril, butadiene and vinylpyridine, a process for preparing said terpolymer and an adhesive comprising said terpolymer. The new terpolymer of the present invention has been found to be particularly useful in establishing a secure bonding relationship between fiber cords and acrylonitrile-butadiene rubbers (NBR). The terpolymer of the presen...

MEMBRANE PROCESS FOR SEPARATION OF ORGANIC LIQUIDS D#79,200 - F A mixture of alcohol, such as methanol, and organic oxygenate, such as dimethyl carbonate, is treated to recover product of decreased methanol content by pervaporation across a composite membrane of a polyvinyl alcohol and a polyacrylic acid on a polyacrylonitrile support layer.

A new copolymer composition comprising the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high thermal stability for separation of an aromatic/saturate mixture. These new membranes have higher aromatic/ saturate selectivity than polyurethanes.

A crosslinked copolymer composition is derived from an aliphatic polyester, a dianhydride and a diisocyanate. The copolymer membrane has high thermal stability and good aromatic/saturate selectivity and permeability.