Vesiculated polymer beads are prepared in which a water-in-oil-in-water emulsion containing a cross-linkable polymer and a copolymerisable monomer in the oil phase is heated in the presence of an initiator to cure the polymer beads, wherein curing is commenced in a first stage in the presence of a substantially water-insoluble initiator and, when the beads are sufficiently stable, curing is comple...

A sewage treatment plant for the purification of waste water includes a chamber container (1) divided by partitions (4) into different sections (6, 7, 8) for pretreatment, biological treatment, chemical treatment, intermediate or retreatment of waste water, each section (6, 7, 8) having several chambers (6a through f, 7a through f, 8a through f) separated from one another by dividing walls (4, 5),...

A volumetric pump, partic. for non-vulcanised rubber comprises at least one delivering piston (10) sliding in a cylinder (11) alternatively between a high (PMH) and low (PMB) point between which in the wall (13) of the cylinder (11) are feed points (12). An exit port (14) fitted with a non-return valve (15) is situated in the closed end of the cylinder at the high point of piston travel. The cylin...

A data processing system is disclosed, which includes a processor having a processor memory and a mechanism for specifying an address that corresponds to a processorrequested data block located within another memory to be accessed by the processor. A hierarchical memory system is provided, which includes a cache and a long-term storage. In accordance with a mapping and meshing process performed by...

Crystalline propylene polymers having P.I. values lower than or equal to 3.7, and having, at an MFR (Melt Flow Rate) ranging from 600 to 1000 g/10 min., an Mw value from 100,000 to 60,000, and at a MFR ranging from 1000 to 2000 g/10 min., an Mz value higher than or equal to 140,000, are obtained by way of polymerization with specific supported catalysts.

CRYSTALLINE PROPYLENE POLYMERS HAVING HIGH MELT FLOW RATE VALUES AND A NARROW MOLECULAR WEIGHT DISTRIBUTION Crystalline propylene polymers having P.I. values lower than or equal to 3.7, and having, at an MFR (Melt Flow Rate) ranging from 600 to 1000 g/10 min., an Mw value from 100,000 to 60,000, and at a MFR ranging from 1000 to 2000 g/10 min., an Mz value higher than or equal to 140,000, are obta...

A new modification of Lifibrol is described with a melting point of 132.degree.C - 138.degree.C, particularly from 134.degree.C 136.degree.C and a primary peak in an IR spectrum at a wave number of 3,200 3,400, preferably 3,250 - 3,350. The new modification of Lifibrol (modification II) is distinguished in that it allows for good crystallization and, therefore, can be formulated without problems o...

The invention concerns ether derivatives of the formula I Q1-X-Ar-Q2 I wherein Q1 is an optionally substituted 9-, 10- or 11-membered bicyclic heterocyclic moiety containing one or two nitrogen heteroatoms and optionally containing a further heteroatom selected from nitrogen, oxygen and sulphur; X is oxy, thio, sulphinyl or sulphonyl; Ar is optionally substituted phenylene, py...

Acetylenic alcohol which is an inhibitor of hydrosilylation reactions, of formula R - (R') C (OH) - C IDENTICAL CH (I> where . R is a linear or branched alkyl radical, or a phenyl radical; . R' is H or R; it being possible for the radicals R and R' and the carbon atom located alpha to the triple bond optionally to form a ring; the total number of carbon atoms contained in R and R' b...

Metering device for introducing controlled volumes of a powdered or granular material into a process such as extrusion compounding (90) comprises a horizontal turntable (21) onto which material is dropped at approximately the required input rate. The turntable is confined by a chamber (2) which can accommodate surges of excess material. The turntable has a thick rim (23) on its upper border with a...

Gas medium passes through expansions and contractions in the flow path, and in the flow direction, to give different speeds and pressures while contacting fluid medium. The fluid is delivered by high pressure jet(s) into the gas flow which has passed through contraction(s) in path. Pref. fluid is sprayed into the gas by a high pressure jet (8, 9) at 5-600 bar, (more than 60 bar). Chicanes (20-22) ...

An intravascular balloon catheter including a proximal tubular member, preferably a proximal hypotube. The distal end of the proximal hypotube is connected to a transition tube which extends distally. The transition tube has a side port at a point intermediate to which the proximal end of a distal catheter shaft section is connected. The distal catheter shaft section extends distally through an in...

Process for colouring the surface of metallic materials by forming a film of oxides, and the products thus obtained. The material to be coloured is subjected to a surface treatment using low-temperature plasma in an atmosphere comprising at least one gas whose molecule contains oxygen atoms. The invention applies chiefly to the colouring of metal plates and sheets, especially those made of stainle...