A radiation absorber comprising a CVD diamond film (16) (24) having at least one of the following characteristics: (a) a surface (18) adapted to be exposed to the radiation and having a roughened or patterned profile so as to trap incident radiation by multiple reflections; (b) a surface (26), bulk texture and grain size such that it is highly absorbent to the radiation by virtue of internal sca...

The invention concerns the cementaion of an oil bore hole or of similar bore holes. According to the invention, the theoretical acoustic impedance of cement is evaluated as a function of some theoretical cementaion parameters, this impedance is corrected as a function of the actual meeasured density of the cement slag during pumping, a correlation is established between with the depth as a functio...

A new stable liquid suspension of water soluble polymer, and a method of preparation are provided. Such compositions comprise of at least an iso-parrafinic oil medium, one styrene/isoprene copolymer, a water soluble polymer and preferably some hydrophobic fumed silica mixed together in the appropriate quantities and conditions.

A method for the production of a particulate hydrated gel polymer, which comprises heating a hydrated gel polymer possessed of a cross-linked structure to a temperature in the range of from 45 DEG to 90 DEG C and extruding the resultant hot hydrated gel polymer through a perforated plate containing holes of a diameter in the range of from 6.5 to 18 mm and an absorbent resin which comprises drying ...

Moulded compositions based on unsaturated polyester resins and containing natural fibres can be hot-pressed to give mouldings which have a residual styrene content of < 0.1% by weight, in particular < 0.01% by weight, and a residual diester content of < 0.05% by weight. The polyester resins comprise a conventional unsaturated polyester and a styrene/di(meth)acrylate mixture, in particular a styren...

A process for wrapping articles, particularly large or heavy articles, with a stretch wrap film is disclosed. The film is at least 45 mu m thick and is made from a polymer blend, such blend comprising (i) from 1 to 20 wt.-% of at least one polybutene having a number average molecular weight of from 500 to 10,000 and (ii) a polyethylene selected from the group consisting of at least one linear eth...

Eine Kautschukchemikalien-Mischung läßt sich besonders gut dosieren, wenn jede Chemikalie in ein Trägermaterial eingebettet ist, wobei parallel aneinanderhaftende Stränge (2, 3, 4) ein Strangbündel (1) bilden und jeder oder mehrere Stränge (2, 3, 4) gesondert eine der Chemikalien enthalten und im Strangbündel (1) in jedem Querschnitt die Chemikalien im gewünschten Verhältnis der Mischung vorhanden...

A foaming agent is mixed to a thermoplastic resin composition containing a graft copolymer obtained by emulsion graft polymerization of a vinyl monomer to an ethylene - propylene - non-conjugated diene copolymer rubber latex comprising from 0.1 to 30 parts by weight of a modified low molecular weight alpha -olefin copolymer uniformly dispersion in 100 parts by weight of an ethylene - propylene - ...

An improved method and apparatus are disclosed for producing large area diamond depositions. A mixture of a carbon compound such as methane, hydrogen and argon is introduced into a DC arc plasma torch to form a plasma jet. The plasma jet is directed and trapped into a partially enclosed chemical vapor deposition zone confined within a reaction chamber of a CVD process. The chemical vapor depositio...

A one-part, air-activatable, polymerisable composition comprising: (a) at least one free-radically polymerisable monomer, and (b) an activator system for effective polymerisation of the free-radically polymerisable monomer, said activator system comprising at least one auto-oxidisable compound of a formula which includes the structure I:- where x is 0 or 1, and where the lines represe...

The invention relates to a method for characterising, with regard to the texture heterogeneities, a geological formation traversed by a borehole. Starting with an image of the borehole wall representative of the variations in a physical parameter of the formation along the longitudinal direction of the borehole and along the periphery of the wall, such as the image provided by the FMS (Formation M...

The utility model discloses an electricity-loss brake for AC servo electrical machinery, which is composed of a flange (8), a magnetic yoke (1), an armature (4), a coil (2), and a fixed friction plate (7). The piston of the armature (4) is positioned on the flange (8); a pressure spring piece (5) is arranged between the armature (4) and the fixed friction plate (7); the two sides of the pressure s...

A process for the preparation of synthesis gas by partial combustion of finely divided solid carbon-containing fuel with an oxygen-containing gas in a reactor. The liquid slag formed during the partial combustion process falls into a water bath or slag quench vessel where it solidifies and from there falls by gravity into a lockhopper from which the solidified slag is batchwise sluiced out of the ...

In accordance with the disclosed method (300), a surfactant (107) is mixed with a sample (105) prior to injection (303) onto a separation column so that both polar and nonpolar sample components can be enriched at the column head. The components are then separated (304) by reverse-phase gradient elution. The surfactant (107) permits nonpolar analytes to be dissolved in a solvent (e.g., water) whic...

A colored steel sheet having a coating thickness which is sufficiently small to permit welding therethrough, and yet exhibiting an excellently colored and lustrous surface. It is a steel sheet having a surface plated with zinc or a zinc alloy, and carrying a chromate film formed on its plated surface, and a colored film formed on the chromate film from a composition comprising specific proportions...

Improved non-stick coating systems can be applied to untreated smooth substrate with a primer of a polytetrafluoroethylene having a melt viscosity over 10<10>Pa Sec plus a copolymer of tetrafluoroethylene with hexafluoropropylene or perfluoro alkyl vinyl ether with the melt viscosity of the polytetrafluoroethylene being at least 10<2>Pa Sec higher than that of the copolymer to give a concentration...

PURPOSE:To readily, industrially and inexpensively produce retinal or geometrical isomer thereof without using dangerous cyanide compound. CONSTITUTION:When retinal expressed by formula I or geometrical isomer thereof is oxidized to provide retinoic acid expressed by formula II or geometrical isomer thereof, the above-mentioned oxidation reaction is carried out in the presence of resorcin and sodi...

PURPOSE:To obtain an excellent transformer used in various kinds of electric machines, wherein the molding is formed in a resin unified body type, the safty is superior, the shape is stable, the close contact fixing on a board is possible, and the automatic mounting on a printed board can be realized. CONSTITUTION:An artificial leg 4 which is formed in a body unified with a bottom surface part 2 a...

The vector mask control system comprises a means for holding a plurality of operands each consisting of a plurality of elements; a means for holding vector mask information consisting of a plurality of elements associated with the respective elements of operand; and vector mask operation instruction executing means for taking out the respective elements sequentially from said operand holding means...