The disclosure relates to a storable polyol pre-mixture for making flame-retardant polyurethane foam plastics consisting of a mixture of a polyester polyol or polyether polyol and an ammonium polyphosphate as a flame-retardant agent. The pre-mixture contains more particularly an ammonium polyphosphate which corresponds to the general formula (I) H(n-m)+2(NH4)mPnO3n+1 (I) in which n stands for an i...

The invention relates to a method for purifying aqueous solutions containing at least one impurity element from the group consisting of arsenic, phosphorus, mercury and other heavy metals and solid matter by precipitation in at least two stages with the aid of precipitation reagents possessing ions capable of forming not-readily dissolved hydroxide precipitate. In accordance with the invention the...

PURPOSE:To obtain safely high quality-metal powder oxidized only slightly on its surface and having various shapes by using the solution in which water is suitably mixed with oil and fat, mineral oil and pure organic compounds etc. as an atomizing medium-liquid for molten metal. CONSTITUTION:More than 30 volume% water is mixed with at least one kind of pure organic compounds such as animal or v...

Expandable styrene polymer particles having reduced flammability are made by incorporating from 0.1 to 15 weight percent of non-polymeric organic halogen compounds into the polymer during impregnation of the polymer particles with a blowing agent in aqueous suspension. The addition of 0.001 to 0.5 weight percent of dialkyl tin maleates or fumarates during the impregnation step produces expandable ...

A melt extrusion process for producing a low density open cell filtering element for an aerosol such as tobacco smoke from plasticized cellulose acetate. A mixture of cellulose acetate, plasticized, a volatile liquid blowing agent which is at least a partial solvent for the cellulose acetate and a nucleating agent are melt extruded under conditions wherein the melt is subjected to high shear, the ...

1520975 Measuring moisture electrically SAINT-GOBAIN INDUSTRIES 28 May 1976 [2 June 1975] 222291/76 Heading G1N (A) [Also in Division H5] A window pane with heating elements deposited thereon includes a moisture detector Fig. 3 comprising a pair of adjacent electrodes 11, 12, and a terminal 10 mounted on a conductive layer 14 on the pane surface, the whole of the detector including the terminal be...

A method of manufacturing a protective and decorative molding for an automobile, comprising the steps of: adding a foaming agent to a starting resinous material comprising a vinyl chloride polymer or copolymer or a blend thereof; kneading the foaming agent and the starting resinous material; successively forming the kneaded mixture into an elongated rod or sheet blank by means of extruder or calen...

A process for treating organically contaminated liquid hazardous waste comprises adding to the waste Portland cement, fly ash and activated carbon.

A trough-shaped reflector for use with rod-shaped sources of ultraviolet radiation in sunlamps has a rear wall behind the source and two side walls which flank the source and define therewith two narrow gaps. The front portions of the side walls are parallel to each other and extend forwardly beyond the source. The front surface of the rear wall has two concave portions which reflect rays into the...

The die (6) comprises a thick cylindrical body (7) which is surrounded by a cooling jacket (15) clamped against the pouring basin (2) and in contact with the latter in a plane (P). The body (7) is extended in the casting orifice (4) by a composite head (17) comprising a thin inner annular lip (22), whereof the inner surface extends that of the body (7) and a ring (24) of refractory material fitted...

Waste water to be treated is introduced into an enclosed gas tight oxygenation chamber. An oxygen-containing gas is also introduced into the oxygenation chamber, at a pressure higher than atmospheric pressure, such that oxygen from the gas is dissolved in the waste water in a quantity higher than the saturation concentration value of oxygen in the waste water at atmospheric pressure, thereby super...

PURPOSE:To avoid the influence of outside vibrations and to improve the detecting accuracy, by arranging a piezoelectric crystal element in such a way that the element is installed to the floating surface side of a floating head and the end face of the element is positioned in the minimum clearance section which is the nearest to the surface of a recording medium. CONSTITUTION:A floating head 2 ha...

1518847 Extruding foamed plastics FURUKAWA ELECTRIC CO Ltd 15 Oct 1975 [22 Oct 1974 20 Nov 1974] 42351/75 Heading B5A [Also in Division C3] An extruded thermoplastic polymer board of thickness not more than 200 mm., which comprises opposed non-foamed skin layers of thickness 0.5 to 3 mm., a non-foamed layer of thickness 0À1 to 2 mm. intermediate of the skin layers and a foamed layer separating the...

PURPOSE:To detect the logical degenerated faults and single short-circuit faults of signal lines, by generating an observation signal for test which can be previously determined independently of normal logic by using an optional productterm line out of an AND array. CONSTITUTION:By adding a simple observation signal (g) for test which can be previously determined independently of a normal logical ...

A liquid for waterproofing a masonry structure contains 20-50% of a diisocyanate and to-50% of a solvent mixture consisting of 40-60% of ethylene glycol monoethyl ether acetate or methylisobutylketone and 60-40% of toluene, all percentages being by weight.

Method and apparatus for processing solid and viscous plastic materialor polymeric material and the like in which plastic or polymeric material is fed through an inlet into an enclosed passage of which opposed side walls are moving simultaneously toward an outlet and the material is processed and dragged forward by the moving side walls against a channel block and with progressive build up of pres...