Thermoplastic synthetic resin foam articles are described which, in accordance with machine production, are elongated principally in the longitudinal direction and have a cross sectional dimension of at least 6.35 mm and a cross sectional area of at least 51.6 cm<2>, where the cells have a mean cell size in the range from 0.1 to 1.2 mm. These cells contain at least one low-permeability halogenated...

A composite brake caliper includes a support member (1) of cast iron which has a support portion (11) bounding a through recess or opening. At least the support portion is at least partially covered by a body (3) of a precision-mouldable material, such as aluminium. The mouldable body may have a portion extending into the through opening of the support portion and having a precision-cast internal ...

A process for removing copper ions from an aqueous solution particularly an industrial effluent where the copper is in complexed form, requires the solution to be adjusted to a pH value of less than 6, preferably 2 to 4, before it is contacted with steel wool. Apparatus comprises a solution reservoir to which acid is controllably supplied to maintain the desired pH value, and one or more replaceab...

A solid finely-divided composition comprises a substrate i.e. carrier and a carboxylated polyalkene. Such compositions can have desirable rheological properties. They may be prepared by absorption/adsorption into/onto the substrate, optionally using a solvent, followed by grinding, or by coprecipitation followed by grinding.

A paint-finishing composition for a cement base material, which comprises, as dissolved or dispersed in a solvent, 100 parts by weight of a solvent-soluble fluorinated polymer having cure sites and an intrinsic viscosity of from 0.05 to 2.0 dl/g as measured at 30 DEG C. in tetrahydrofuran, from 0.1 to 100 parts by weight of a curing agent and from 5 to 500 parts by weight of a coloring agent.

A process for obtaining fiber-reinforced foams suitable to be transformed into reinforced solid cellular materials having a density lower than 0.7 kg/l, if inert fillers are not present, and lower than 1 kg/l if inert fillers are present as well, essentially by mechanical incorporation of gas or a mixture of gases into an unsaturated polyester resin containing conventional additives is described. ...

A process for producing a binder (cement) to be used in slurry, mortar, or concrete having a low water-to-cement ratio. As raw-material for the binder is used at least 50% by weight of a hydraulic material, such as slag, technical pozzolanas and/or natural pozzolanas. The hydraulic material is ground to a specific surface of at least 400 m2/kg. To the raw-material is added 0.1 to 5% by weight of a...

Caprolactam polymeric substrates are conditioned for electroless plating by etching with an aqueous solution of organic acid containing from 2 to about 10 carbon atoms, preferably an acetic acid compound, such as trichloroacetic acid.

A flexible packaging film is described comprising a base layer which consists of or comprises one or more polyolefins, and which has been treated by corona discharge, flame or chemical oxidation on one side only, a low temperature heat- sealable coating which is capable of heat-sealing at a temperature below the softening point of the base layer provided on the untreated side of the base layer, an...

A process for producing vesiculated polymer beads which have a reduced tendency to be yellow involves forming an oil phase of a polyester resin containing a monomer copolymerisable therewith and a pigment which is mixed with a first aqueous phase containing a particular base and a water soluble inorganic salt to form an emulsion to which a second aqueous phase containing an emulsifying agent is th...

A brake release mechanism for a spring-loaded, normally applied vehicle brake releasable by system hydraulic pressure when the system is disabled includes a pilot-operated brake release valve for isolating the brake from the disabled system, a brake control valve disposed between the system and the brake, and a manual hydraulic pump communicating with the brake for supplying fluid pressure thereto...

Improved mounting of a rack, constituent means and applications. The rack 10 has the shape of a hollow oval body 11 with ribs 13, 13a jutting out and has a toothed rake 9. The teeth 9 are guided by rollers 12. According to the invention one or several tracks S are provided which prevents the rollers from becoming stuck due to accumulation of grease and dust in the rack. Application to the control ...

1. A process for the production of particulate polyolefin moulding materials having improved properties, which are composed of (a) 100 parts by weight of a particulate, partially crystalline polyolefin which has a particle diameter of from 10 to 5000 mu m and an intrinsic viscosity [eta], measured in decahydronaphthalene at 130 degrees C, of from 0.5 to 15, (b) 0.001 to 2 parts by weight of a conv...

Optical device for giving access to a track carried on a moving data carrier incorporating a moving element comprising a galvanometric mirror and a focusing objective movable relative to the data carrier and a fixed light energy source incorporating at least one laser emitter. Magnifying optical means of the afocal type are also inserted between the moving element and the light energy source. The ...

An electronic control system for a motor vehicle friction clutch and which has an electrical reference signal generator, an engine speed sensor and signal means, and a throttle position sensor which produces a signal indicative of throttle opening. The throttle signal is combined with the engine speed signal to form a modified engine speed signal and a comparator receives the modified engine speed...

An electronic control system for a motor vehicle friction clutch and which has an engine speed sensor, a reference signal generator, and a clutch actuator responsive to an error signal E derived from engine speed and reference signals V1 and VR respectively. The error signal E is fed into an integrator having two operation modes, dependent upon whether a capacitor in the integrator circuit bypasse...

A water-in-oil emulsion of a water-soluble polymer such as acrylamide/acrylic acid copolymer having improved invertibility is prepared by (1) adding a portion of an inverting surfactant such as sorbitan trioleate having 20 polyoxyethylene units to a water-in-oil emulsion of water-soluble monomer, (2) polymerizing the monomer and (3) adding a remaining amount of inverting surfactant to the emulsion...

The surfaces of shaped articles prepared from a polymer derived from monomer comprising an acrylate and/or methacrylate can be improved by treating the article with hot water, with an aqueous alkali solution or with an aqueous acid solution. Stains can easily be removed from the surfaces of articles treated in this way and the articles are hydrophilic and have excellent water wettability. The inve...

This invention concerns apparatus which is adapted to purify water by the introduction of metal ions into the water. A chamber is provided which houses two electrodes which are made of metals whose ions are known to have water-purification properties. Water to be purified is passed through the chamber, whereupon a controlled concentration of purifying ions are passed into the water. The metal ions...

A method for preparing a glass container, and for sealing a glass mouth of a container and the seal is described. The sealing surface of the container is prepared by treatment with fluorine and a metal oxide, or a sulfur oxide and a metal oxide, or fluorine alone or a sulfur oxide alone, at an elevated temperature, in the case of fluorine employing a fluoride compound which decomposes at the tempe...