PCT No. PCT/FR84/00015 Sec. 371 Date Sep. 24, 1984 Sec. 102(e) Date Sep. 24, 1984 PCT Filed Jan. 23, 1984 PCT Pub. No. WO84/02914 PCT Pub. Date Aug. 2, 1984.Process for the preparation of cellular products and laminates based on anhydrous furan prepolymers which possess free OH groups, which is carried out at normal temperature using small amounts of silicon tetrachloride and/or phosphorus oxychlo...

The present invention relates to a family of novel and efficient drag reduction agents for a variety of organic solutions which comprise a family of polymeric complexes (i.e., polyampholytes) which are terpolymers of styrene/metal styrene sulfonate/n-vinylpyridine (NVP). The metal styrene sulfonate is an anionic monomer, while n-vinylpyridine is a base which becomes chemically coordinated to the m...

A suspension of an aqueous solution of a water-soluble polymer in an organic liquid forming a continuous organic phase, said suspension containing, as an emulsifier, a mixture of two copolymers which are similar but differ in their content of basic nitrogen by 0.1 to 1.5 percentage points.

A resole resin in the form of microspherical particles whose surfaces are partly or entirely covered with a coating of a substantially water-insoluble inorganic salt and which are not larger than 500 mu m in size, and a process for producing such resole resin. The resole resin comprises solid particles that are highly heat reactive and can be stored in a stable manner for a prolonged period. The ...

Polycyanoaryl ether fibers prepared from polycyanoaryl ethers containing specific repeating units and number average molecular weights or reduced viscosities by stretching melt-spinned fibers, said fibers having superior heat resistance and mechanical strength.

In an optical head, a semiconductor laser is supported on a base and the base is secured to a hollow frame. A lens-barrel for supporting collimator lens system is disposed in the hollow frame so that the collimator lens system is faced to the semiconductor laser. The frame and lens-barrel are secured in point contact securement to each other by studs screwed in dies provided on the frame. The base...

A downhole telemetry system for transmitting signals from a subterranean region in a well to the surface of the earth while drilling employs changes in the mud pressure encoded in digital form. The changes in mud pressure are accomplished by two balanced valves, one of which increases pressure by control of flow within the drill string, the other of which controls flow from the drill string to the...

PURPOSE:To obtain said film which has excellent abrasion-resistance, slipperiness and few drop outs and is suitable for a magnetic tape, by generating a specific state of a surface on a polyester film by incorporating lithium fluoride particles. CONSTITUTION:By making a polyester film to contain preferably lithium fluoride particles of 0.005-0.05 (wt.) % to the polyester film and preferably separa...

PURPOSE:To prevent a wire regulator from rusting due to adhesion of rain water, muddy water or another thereupon by covering the tip of wire together with the wire regulator provided on the brake control wire with use of dust boots. CONSTITUTION:A drum brake to be installed on a motor cycle, or the like produces braking force in such a way that a cam shaft lever as unshown in the figure engaged wi...

A layer of a liquid composition containing an epoxide resin as the sole photopolymerizable component, a heat-activated curing agent for epoxide resins, and preferably a photopolymerization catalyst, is exposed to actinic radiation until the layer solidifies to form an essentially solid, continuous film due to photopolymerization of the epoxide resin through epoxide groups, the resin remaining, how...

A tape (10) comprising a polypropylene backing (12) coated on one surface with an adhesive (14). The backing (12) is biaxially oriented to provide a secant modulus of elasticity measured at one percent elongation in its longitudinal direction of at least about 25 x 105 kilopascals, will break before it can be stretched in its longitudinal direction by about 55 percent and can be transversely cut b...

A process for treating a stone surface is disclosed. Stone floor surfaces, such as, marble and terrazzo, are treated with an acid conditioner followed by buffing with a crystallizing agent whereby a durable, high gloss finish is produced in situ on the floor surface.

A dental composition which when used together with a photopolymerizable dental sealing composition promotes adhesion of resin-based dental restorative materials to the tooth consisting of a solution of (i) at least one phosphate selected from the group consisting of methacryloyloxyethyl dihydrogen phosphate and bis-(methacryloyloxyethyl) hydrogen phosphate and (ii) a photopolymerization catalyst c...

A motion detector for detecting motion in a picture contained in a television signal includes a filter that extracts a portion of the frequency spectrum of the television signal. The amplitude of the sidebands of the television signal in this portion of the frequency spectrum is indicative of motion in the picture scene. The signal from the filter is coupled to a peak detector that produces a moti...

A vector processor has a main storage, a main memory control circuit, vector registers, data transfer circuits; an address register group, and vector arithmetic units. The vector processor performs vector arithmetic processings of vector data received from the vector registers and sends the results to the vector registers. For simple vector instructions, the vector processor divides the vector pro...

PURPOSE:To allow hard ware only controlling the inlet and outlet of a loop-like queue at two points to activate plural auxiliary processors by employing the queue available from jointing registers in a loop-like shape. CONSTITUTION:An auxiliary processor activation instruction detected by a main processor 1 is transmitted to a queue input circuit 6, and fetched in the loop-like queue. The auxiliar...