Abstract:
A heat dissipating device (10) and method for dissipating waste heat produced by a solid state device (18), which includes (a) a solid state device (18) and (b) a heat sink for dissipating waste heat produced by the solid state device which includes a base member (14) being in thermal contact with the solid state device (18) and a plurality of elongated heat conducting elements (16) extending outwardly from the base member (14).
Abstract:
The hydroformylation reaction product obtained by reacting polybutene having degree of polymerization greater than 6 with carbon monoxide and hydrogen in the presence of a cobalt catalyst at a temperature in the range of about 125 DEG C to about 225 DEG C and at a pressure of about 1000 to about 5000 psi, wherein the molar ratio of hydrogen to carbon monoxide is about 1 to 3:1.
Abstract:
This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (IV), and blends of these polymers and articles made from both. Units (I), (II), (III), and (IV) are present in specified proportions as defined in the description of the invention. The instant copolyesters display orientation in the molten state, good fiber ratings and high strength; they have melting points in the range of from about 340 to about 400 DEG C and are melt-processible. Advantageously, these compositions filled with about 30 weight percent of glass fibers display heat distortion temperatures of over 240 DEG C up to about 280 DEG C and higher, when measured under a load of 264 psi. When blended, certain properties are improved, particularly they are easier to melt-fabricate, have a decreased tendency to blister and increased strength. These polymers and blends may be used advantageously in ovenware, electronic components, electrical equipment, and other end uses requiring high temperatures.
Abstract:
Aromatic polyesters based on isophthalic acid, terephthalic acid, p-hydroxybenzoic acid, hydroquinone and an arylene diol are described. The five monomers are used in well-specified proportions and yield polymers that display an excellent overall combination of mechanical and thermal properties. The subject copolyesters have melting points of at least about 260 DEG C; their heat distortion temperatures are at least about 200 DEG C. They have fiber ratings of up to 3. The novel polymers can be melt-fabricated using standard injection moulding, extrusion and melt-spinning techniques.
Abstract:
The degradation of organic electrode separators in rechargeable lithium-sulfur dioxide electrochemical cells which utilize chemically uncombined aluminum chloride as an electrolyte component can be reduced by incorporating an additive into the electrolyte which is effective to provide a redox couple having a potential in the range which is above that of the SO2/S2O4-2 couple and below that of the Cl2/Cl- couple.
Abstract:
A dry seal for a rotatable shaft (36) is disclosed. The seal includes an axially monolithic elastomeric sealing element (11) having a shaft side (12) and a casing side(14). The shaft side is provided with a plurality of radially inwardly extending circumferential fins (20), each fin tapering toward an apex (22). The cross-section of each fin in a plane passing through the axis of the shaft (36) is asymmetric. Two spaced fins with apices pointing away from one another define therebetween a circumferential purge chamber (32). Optionally, adjacent fins having apices pointing in the same axial direction away from the purge chamber define therebetween a circumferential sealing chamber.
Abstract:
This invention relates to extrusion-grade compositions comprising mixtures of wholly aromatic polyesters. These compositions can be extruded into smooth films and sheets having good properties and pleasing visual appearances.
Abstract:
An electrical device formed from a blend of (a) an aromatic polycarbonate, (b) a polyarylate resin, (c) a poly(alkylene terephthalate) resin, (d) fiberglass, and (e) an additive effective to inhibit ester-arylate interchange. Also described herein is a composition comprising a polyester and an aromatic polycarbonate in particular proportions.
Abstract:
Novel crystalline chain extended poly(aryl ether ketones) which display excellent toughness, fabricability and very good high temperature and solvent resistance.
Abstract:
Process for treating the reaction product of propionic acid and formaldehyde to recover methacrylic acid from an acqueous effluent wherein said effluent contains methacrylic acid, unreacted formaldehyde, unreacted propionic acid, water and by-products.