PCT No. PCT/SE96/00040 Sec. 371 Date Jul. 17, 1997 Sec. 102(e) Date Jul. 17, 1997 PCT Filed Jan. 18, 1996 PCT Pub. No. WO96/22248 PCT Pub. Date Jul. 25, 1996An apparatus for producing highly pressurized air-saturated water intended preferably for dispersion in flotation plants, has, preferably, an upstanding cylindrical pressure vessel (21) which, in operation, is filled partially to a controlled ...

PCT No. PCT/SE96/00041 Sec. 371 Date Jul. 17, 1997 Sec. 102(e) Date Jul. 17, 1997 PCT Filed Jan. 18, 1996 PCT Pub. No. WO96/22249 PCT Pub. Date Jul. 25, 1996A device for distributing and dispersing highly pressurized air-saturated water, preferably for use in a flotation tank (1) of a water purification plant, is placed adjacent to inlet openings (2) through which water to be treated in the flotat...

The invention relates to a process for the preparation of positive or negative active mass of lead accumulators by using the active mass separated from production-refuse plates and/or the active-mass wastes produced during production. According to the invention when positive active mass is prepared then positive active mass, while when the negative active-mass is prepared then negative active-mass...

An article for tape-automated bonding of integrated circuit microchips comprises a carrier sheet (22) (Fig. 2) carrying conductive tracks (23) with a tubular metal formation (21) passing through the sheet at the end of each track for connection to a microchip (24). The tubular formations tend to accommodate irregularities in the chip and may contain solder or other metal having a lower melting poi...

A transfer device for a four-wheel drive vehicle has a transfer shaft (5) rotatably mounted by first (11) and second bearings (8), and a transfer gear (6) rotatably mounted on the transfer shaft (5) between the bearings. A coupling device (17) is provided outside the first bearing (11) for engaging the transfer gear with the transfer shaft, and a bevel gear (7) is secured to the transfer shaft at ...

An expanded polymer product with high distortion temperature, high flame resistance and low smoke toxicity and opacity comprises, in combination: between 18% and 25% of a mixture of at least two isocyanates; between 8% and 11% of a modified terpolymer; between 19% and 42% of a PVC resin in emulsion form; between 4% and 7% of at least one expanding agent; between 0.5% and 1% of at least...

A pneumatic tyre is formed by vulcanising a raw cover tyre which is composed of a toroidal tyre main body with a tread bottom part (15) for forming a tread part (4) of a tyre disposed between sidewall parts (9) each extending from a bead part (7), an unvulcanised cushion rubber layer (11) arranged on the tread bottom part (15), a reinforcement layer (6,106,206) of reinforcing cords arranged on the...

A gear wheel is formed from a pressed and sintered powder metal blank (2) by surface hardening the tooth, root and flank regions to establish densification in the range of 90 to 100 per cent to a depth of at least 380 microns.

An improved film for optical recording media comprising mainly polyester film having a photo elasticity coefficient of 1.2x10 power -3 mm 2/kgf or less, a surface roughness (Rt) of 100 nm or less and with an average distance between surface projections of 29 micron or more. The polyester is obtained by the reaction of (1) a bifunctional carbonic acid and/or its ester deriv with (2) a dihydroxy cpd...

A method, using a public-key cryptosystem, for enabling a predetermined entity to monitor communications of users suspected of unlawful activities while protecting the privacy of law-abiding users, wherein each user is assigned a pair of matching secret and public keys. According to the method, each user's secret key is broken into shares. Then, each user provides a plurality of "trustees" pieces ...

A crosslinkable polymer composition comprises an olefin copolymer or graft copolymer with hydrolysable silane groups and a silanol condensation catalyst, as well as a silane compound with at least one hydrolysable organic group. The polymer composition is characterised in that the silane compound has a compatibility with the polymer composition of at least 0.035 mole hydrolysable groups per 100 g ...

The bonding of a rubber composition to a metal reinforcement, especially a brass-coated steel reinforcement, is improved by including in the rubber composition prior to vulcanisation: (a) a reaction product of a nitroso phenol and a polyisocyanate; and (b) a cobalt or nickel bonding agent. The reaction product used can be a reaction product of 4-nitroso phenol and TDI or MDI. The method is...

A process for forming flat plate ballistic resistant composites which includes impregnating a low-alkali magnesia-aluminum-silicate glass fiber woven roving with an impregnating composition. The impregnating composition includes a resin solution of a polyester resin in a polymerizable monomeric solvent a free radical catalyst and optionally, a thickening agent and further optionally a flame retard...

The bonding of a sealant or coating to a substrate can be improved by applying to the substrate a composition containing a specified polydiorganosiloxane and a specified reactive compound, then applying the sealant or coating to the cleaned and treated substrate. The polydiorganosiloxane is a linear polydiorganosiloxane having a viscosity of from 10 to 50 centistokes at 25 DEG C. or a cyclic polyd...

Improved resin-coated carbon fibres (1) are obtained by heat treatment of carbon fibres covered with an aromatic sulphone resin at 300 to 400 deg.C. The heat resistant resin compsn. comprises (1) (5-50 wt.%) and a heat-resistant resin (95-50 wt.%). The heat-resistant resin is selected from polyether sulphone, polyetherimide, polysulphone, polyamideimide, polyimide, polyphenylene sulphide, polyethe...

A process for producing a polyethylene material for use in products requiring high mechanical strength and high elastic modulus is disclosed. The process involves the use of a specific class of particulate polyethylenes having an intrinsic viscosity of 5 - 50 dl/g in decalin at 135 DEG C and the steps of compression-molding, solvent-immersing, solid-phase extruding or rolling and finally drawing t...

Foaming of thermoplastic arcomatic polycarbonates of wt. average mol.wt. (Mw) 5000-50,000 is effected by mixing 100 pts.wt. of the polycarbonate with 0.1-5 (pref. 0.2-2) pts.wt. of a glyoxal hydrate of formula (I) (n = 0-10, esp.2) at 220-320 deg. C and then injection moulding or extruding the mixt. at 220-320 deg. C, with the reaction time limited to 0.5-5 mins. USE/ADVANTAGE - Polycarbonates con...

Porous, cross-linked polymeric materials comprising hydrocarbon residues can be sulphonated to produce sulphonated polymers which are able to absorb large volumes of ionic solutions and also act as ion-exchange resins.