SE OBTIENEN ARTICULOS DE POLI(ALCOHOL VINILICO) DE RESISTENCIA Y MODULO ELEVADOS MEDIANTE GELIFICACION TERMORREVERSIBLE DE UNA SOLUCION DE POLI(ALCOHOL VINILICO) Y EXTRACCION DEL DISOLVENTE UTILIZANDO UNA MEZCLA DE ALCOHOL O UNA CETONA INFERIOR Y AGUA, SEGUIDO DE UN ELEVADO ESTIRAMIENTO. PREFERENTEMENTE, EN CALIDAD DE AGENTE DE EXTRACCION SE UTILIZA UNA MEZCLA DE 5-80% EN VOLUMEN DE ACETONA Y 95-2...

1. An aqueous homegeneous, from 25 to 60 % by weight solution at pH 3-7 of a mixture of a) a homopolymer of acrylic acid and/or copolymer of acrylic acid containing up to 50 % by weight of maleic acid and/or maleic anhydride and having a K value from 10 to 25 and b) nitrilotriacetic acid, a polyaminopolycarboxylic acid, a polyaminopolyphosphonic acid and/or a hydroxylkanepolyphosphonic acid, in wh...

A pre-expanded particle suitable for foaming in a mold comprising polyolefin which has a characteristic property that an inclination of slope line obtained on a graph when logarithmic values of melt tension of the polyolefin are plotted as ordinate and reciprocals of absolute temperature at which the melt tension is measured are plotted as abscissa is less than 1,500 is provided. A foamed article ...

The reduction of the adhesion to glass of thermoplastic polyvinylbutyral molding compositions, in particular films, which contain plasticizer and in which the polyvinylbutyral component has an increased content of vinyl alcohol units, by addition of a combination of potassium hydroxide, potassium formate or potassium acetate and a compound having a betaine structure, as the anti-adhesive agent. Us...

Disc brake assemblies (10) include a phenolic piston (16) disposed within a bore (14) of a housing (11), the piston (16) movable relative to said housing (11) in order to engage brake shoe pads (18, 20) with the disc (22) of the brake assembly. An interior seal ring (42) and an exterior boot seal (60) are disposed between the bore (14) and piston (16) in order to prevent contaminants from entering...

The present invention relates to a foamable polyetherimide resin. These foamable polyetherimides have an effective amount of a chemical blowing agent which decomposes at a temperature equal to or greater than the glass transition temperature of the polyetherimide resin and does not have an adverse effect on the polyetherimide.

This invention relates to fibre-reinforced or filled polyphenylene sulphide and to a process for the production thereof.

The receiving block (8) whose receiving surface is connected to a vacuum point and holds the microscope slide (5) with the sample (1) to be ground is mounted above the grinding wheel (2) on a lifting carriage (13) which slides on vertical guide shafts (10). A measuring point (38) connected to the grinding wheel continuously measures the vertical distance of a sensor (34) connected to the lifting c...

A control system is described for a continuously variable transmission having a spool type transmission ratio control valve for controlling oil supply to a cylinder of a drive pulley of the transmission in order to change the transmission ratio. The transmission ratio control valve is itself controlled by a hydraulic circuit (Figure 2b of the system). By controlling flow of oil supplied to the spo...

A locating device for a soil displacement hammer is disclosed and comprises a cylindrical, radio wave-transparent housing which is releasably connected between an air line for the soil displacement hammer (mole) and the hammer itself so as to permit air communication through the housing. Mounted along the axis of the housing is a cylindrical radio wave transmitter, such that, when the hammer is dr...

Oriented net furniture support materials made from thermoplastic elastomers have been found to possess a unique combination of properties including high strength, low creep and good flexibility. These furniture support materials can be made by extrusion through a pair of concentric die sets rotating transversely to one another or by weaving of monofilament.

The process for generating low-sulphur gas from finely ground carbonaceous solids with oxygen or oxygen-containing gas and steam as gasifying agents in powder gasification is characterised in that the powder gasification products are largely desulphurised and cooled by means of a fluidised bed of inert materials, liquid and pasty fractions are separated off, cooled and solidified, and the sensible...

A disc brake calliper 10 includes a reaction member 34 slidably contacting the inner wall of the brake cylinder and a retraction spring 38 acting between the reaction member and piston 16 to retract the piston a predetermined distance following a brake application. The device reduces brake drag and improves vehicle fuel economy.

The invention relates to a reciprocating process and apparatus for laying profile pieces on a base in view of plotting and/or cutting off. The process is characterized by the fact that it comprises the storage into a computer unit (1) of the coordinates of templates, shapes, patterns for cutting out, after the positioning of the base on a plotting or cutting table, the direct or indirect projectio...

An HIPR emulsion of bitumen in water is prepared by a method which comprises directly mixing 70 to 98% by volume of bitumen having a viscosity in the range 200 to 500,000 mPa.s at the mixing temperature with 30 to 2% by volume of an aqueous solution of an emulsifying surfactant, percentages being expressed as percentages by volume of the total mixture. Mixing is effected under low shear conditions...

A hydraulically controlled disk brake of a motor vehicle having at least one hydraulically actuable brake piston that is arranged in a caliper and is guided in at least one cylinder. The brake has a duct which continuously serially connects the cylinders in each half of the caliper, this duct having separate inlet and outlet openings. A check valve for each inlet and outlet opening is respectively...

The present invention relates to the modification of recycling gasification process in two stage oven. Gas produced by recycling coal gasification in two stage oven can not be used directly to synthesise ammonia, while the stationary layer batch gasification oven feeds on solid fuel of good quality. By present method the gasification process in two stage oven is composed of the following five step...

To seal a cable junction, an insert is placed between two branch cables (42a,42b;55,56;56,101a,101b) of the junction, which is then enclosed by a heat shrinkable envelope (45,58,103). The insert has at least one insert part having a block (32,43a,43b,50,70,80,100a,100b,100c) of heat fusible material attached by one or more flanges (31,41a,41b,51,82,102a,102b,102c) of heat conductive material to th...

A differential gearing assembly including a differential case 10 that mounts axle drive gears 22 rotatably engaged with axles 20 and transfer gearing 50 for cross coupling the axle drive gears. The axle ends are secured to the differential assembly by lock rings 32 received by lock ring grooves formed on the axle ends. A thrust spacer maintains the predetermined spaced apart position of the axle e...

Disclosed is a method of coating a substrate comprising the steps of (A) coating the substrate with one or more applications of a basecoating composition containing (1) an organic film-forming resin, (2) substantially colorless, substantially inorganic microparticles stably dispersed in the basecoating composition, (3) a solvent system for the film-forming resin, and (3) pigment particles to form ...