DISPOSABLE CENTRIFUGAL BLOOD PROCESSING SYSTEM Herbert M. Cullis A continuous flow centrifugal processing system for separating whole blood into fractional components includes a centrifugal separator unit having a molded bowl-shaped outer shell dimensioned to fit within a rotatably-driven casing on an associated centrifuge apparatus. A bowl-shaped inner shell disposed within the outer shell forms...

Polyoxyalkylene foam stabilizing surfactants can be prepared by reacting a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid under free radical polymerization conditions in the presence of a free radical initiator, and by subjecting the reaction product obtained to a solvent extraction. The isolated components can be utilized as surfactants in pr...

A novel crystallographic modification ( beta -modification) of the pigment C. I. Pigment Red 53:1 is described and claimed which has characteristic reflection values in its X-ray diffraction pattern obtained by means of Cu-K alpha radiation. This novel pigment form is obtained by reacting an aqueous solution of an alkali metal or ammonium salt of the formula 1 (1) with the equivalent...

A solid-state electrosurgical generator is disclosed which provides output waveforms that are optimized for electrosurgical fulguration. The fulguration output circuitry consists of a radio-frequency tank circuit which is periodically pulsed to produce a periodic damped-sinusoidal output waveform. However, the damping factor is sufficiently low so that many cycles of the waveform occur between per...

An elastic molded body comprising a cell structure consists of an elastic synthetic plastics material produced by a polyaddition reaction between a liquid diisocyanate or polyisocyanate and a reactant containing at least 18 percent by weight polybutadiene. Elastic hollow microspheres having thin shells consisting of a vinylidene chloride copolymer are embedded within this synthetic plastics materi...

The invention relates to stabilizer-containing reactive components for the production of polyurethane foams having little or no tendency towards core discoloration which are characterized by a stabilizing addition of monomeric and/or oligomeric derivatives of the diphenylamine series, including the phenothiazine series. The invention also relates to new stabilizers of the diphenylamine and/or phen...

This invention relates to polyurethane foams capable of being welded by high frequency welding and a process for producing the same, characterized by the addition of certain ammonium salts of acids containing phosphorus to the starting components for the polyurethane foam in order that the polyurethane starting materials and the polyurethanes contain from 0.1 to 10%, by weight, of ammonium salts o...

Described herein is a frothable thermosetting polyurethane-forming composition, a process for producing a curable froth from said composition, a process for applying the curable froth to a substrate and a cured cellular polyurethane produced from the curable froth.

This invention is directed to a polyurethane foam composition which is suitable as a hacking for a substrate and to a substrate containing the polyurethane foam composition. The foam composition is the reaction product of a frothed polyurethane forming mixture comprising a relatively high molecular weight polyether polyol, a relatively low molecular weight polyol, an organic polyisocyanate or poly...

A bottom of a combustion chamber of a fluidized bed firing system is penetrated by coal nozzles for introducing a coal/air mixture, and by air nozzles for injecting combustion air into the fluidized bed. A plate provided with openings is arranged in spaced relationship above each coal nozzle for achieving an improved burn-up.

A brake mechanism (10) operable to maintain an air operable control drive mechanism (12) in position in the event of failure of the air supply is disclosed. A first rack section (22) is attached to a control lever (16) of the control drive mechanism (12) and is engagable in any operable position of the control lever (16) by a second arcuate rack section (24). A compression spring (62) acting on a ...

For manufacturing a composite material, organic fibrous material like paper, straw, hay, grasses, moss, leaves, reed is mixed with alkali silicate and a fluosilicate as well as with a metallic oxide or a basic metallic silicate forming a higher melting silicate and submitted to a treatment under pressure and temperature. This produces a composite material having high mechanical strength and fire-p...

A process for preparing an open-cell structure from a vinyl chloride resin. The process includes mixing a vinyl chloride resin, stabilizer, plasticizer, surface active agent, azodicarbonamide and 4,4'-oxybisbenzenesulfonyl hydrazide to form a vinyl chloride resin paste. The vinyl chloride resin paste of step (a) is rendered alkaline, and mixed to form a uniformly-mixed paste. The paste is permitte...

Expandable vinyl aromatic polymers are produced, which exhibit fast-cool properties upon formation of foamed articles therefrom, by polymerizing a vinyl aromatic monomer, in which is dissolved 1.0-10.0 percent, based on the monomer, of a thermoplastic, branched, block copolymer of 55-95 percent of polymerized vinyl aromatic monomer and 5-45 percent conjugated diene, the polymerization forming viny...

A microcellular low density foam of poly(4-methyl-1-pentene) which is particularly useful for forming targets for inertial confinement fusion has been developed. Articles made from the foam have been machined to tolerances of 0.0001 inch, although the densities of the fragile foam are low (about 10 to about 100 mg/cc) and the cell sizes are small (about 10 to about 30 mu m). Methods for forming t...