Abstract: The present invention provides an epoxy resin of the formula ##STR1## where A is selected from the group consisting of --C(CH.sub.3).sub.2 --, --C(CF.sub.3).sub.2 --, --S--, --SO.sub.2 --, --CH.sub.2 --, --CO--, --O--, and --C.sub.3 H.sub.6 --, and each B.sub.1, B.sub.2, B.sub.3, and B.sub.4 is independently selected from the group consisting of --H, --F, --Cl, --Br, --I, --CH.sub.2 CH.dbd.CH.sub.2, --CH.sub.3, --C.sub.2 H.sub.5, --C.sub.3 H.sub.7, and --C.sub.4 H.sub.9.The present invention also provides a curable composition comprising an epoxy resin of the foregoing formula (I) and an effective curing amount of a hardener for an epoxy resin. The moisture sensitivity of the cured castings and/or composites based on the epoxy resins is lower than known epoxy resin castings and/or composites that have comparable thermal stability, modulus, strength, processability, and toughness.

Abstract: A composite useful in thermal energy storage, said composite being formed of a polyolefin matrix having a phase change material such as a crystalline alkyl hydrocarbon incorporated therein. The composite is useful in forming pellets, sheets or fibers having thermal energy storage characteristics; methods for forming the composite are also disclosed.

Abstract: The present invention provides a process for producing aromatic ether bismaleimides of the Formula (II) ##STR1## wherein A is a divalent mononuclear or polynuclear aromatic linking group. The process provides good yields and can be scaled up readily to commerical size runs.The present invention also provides compositions containing at least about 80 weight % of the bismaleimide of Formula (II) above.

Abstract: The present invention provides a process for producing aromatic ether bismaleimides of the Formula (II) ##STR1## wherein A is a divalent mononuclear or polynuclear aromatic linking group. The process provides good yields and can be scaled up readily to commercial size runs.The present invention also provides compositions containing at least about 80 weight % of the bismaleimide of Formula (II) above.

Abstract: A polymeric composition comprising a polymeric material and polyethylene glycol or end-capped polyethylene glycol as a phase change material, said polyethylene glycol and said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g; the composition is useful in making molded and/or coated materials such as flooring, tiles, wall panels and the like; paints containing polyethylene glycols or end-capped polyethylene glycols are also disclosed.

Abstract: Compositions containing crystalline, straight chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.

Abstract: A gas turbine having internal cooling and method of operating the same includes the bypassing of a portion of the cool air from the compressor section into the turbine section along the suction side of the turbine blades while maintaining stable flow conditions in which there is relatively low intermixing between the cool airflow on the suction side and the hot gases on the pressure side.

Abstract: The present invention replaces the aluminum oxide in ALCAP ceramics with zinc oxide or zinc sulfate or mixtures thereof to provide a resorbable high strength ceramic. Specifically, a zinc bioceramic is provided comprising about 10 to 50 wt. % zinc oxide or zinc sulfate or mixtures thereof, about 30 to 40 wt. % calcium oxide and about 10 to 40 wt. % phosphorus pentoxide.The zinc based ceramics of the present invention can be used in many of the same applications as hydroxyapatites, tricalcium phosphates and ALCAP ceramics. When mixed with a setting agent, the zinc based ceramics of the present invention are useful as surgical cements or grouts. The zinc based ceramics are also useful as hard tissue substitutes in orthopedic, dental and maxillofacial surgeries and as drug delivery devices.

Abstract: A method is disclosed for measuring the remaining useful life of a hydrocarbon oil containing at least one additive species. An oil sample is mixed with a solvent, a solid substrate, and in some cases an electrolyte to produce an analysis sample. The analysis sample is placed into an electrolytic cell and subjected to a voltammetric analysis, whereby increasing potential is applied to the cell to produce an oxidation reaction and a varying electric current. The current during the voltammetric analysis is measured and recorded. Remaining useful life for the oil is then determined from the oxidation current wave height produced.

Abstract: Apparatus is disclosed of transferring energy into a flow of air without use of rotating parts, in which an inlet flow of air is made to swirl into a first circular path moving longitudinally of a housing, heat is added to the inlet flow of air at the end of the first path to produce hot gases, and the hot gases are directed into a second swirling circular path coaxially of and within the first path and having an open interface therewith, whereby energy is transferred from the hot gases in the second path into the inlet flow of air in the first path. An embodiment of the apparatus is disclosed in the form of a fluid mass reaction engine having an annular housing (11) including an inlet (10) thereinto and an outlet (38) therefrom, a combustion chamber (25) in the housing spaced from the inlet, spaced coaxial openings into and out of the combustion chamber, and a means for heating air flowing through said combustion chamber.

Abstract: A method is disclosed for measuring the remaining useful life of an ester-based lubricant containing at least one antioxidant species. A lubricant sample is mixed with a solvent, an organic base and an electrolyte to produce an analysis sample. The analysis sample is placed into an electrolytic cell and subjected to a cyclic voltammetric analysis, whereby a varying electric current is produced within the cell. The current during the cyclic voltammetric analysis is measured and recorded. Remaining useful life for the lubricant is then determined from the average maximum reduction current wave height produced.

Abstract: The present invention provides a ceramic composite having an open porous network and a controlled pore size comprising a plurality of ceramic particles having a fused glass coating and a method for producing the same. The ceramic particles are enveloped by and bonded to adjacent ceramic particles at their interfaces by the glass coating.

Abstract: Resins are prepared by polymerization of compounds of the formula ##STR1## where R is a divalent linking group. Blends of a compound of the formula (I) as defined above and a bis-maleimide of the formula ##STR2## where Ar' is an aromatic linking group.

Abstract: A composite useful in thermal energy storage, said composite being formed of a polyethylene matrix having a straight chain alkyl hydrocarbon incorporated therein, said polyethylene being crosslinked to such a degree that said polyethylene matrix is form stable and said polyethylene matrix is capable of absorbing at least 10% by weight of said straight chain alkyl hydrocarbon; the composite is useful in forming pellets or sheets having thermal energy storage characteristics.

Abstract: A method is disclosed of transferring energy into a flow of air without use of rotating parts, in which an inlet flow of air is made to swirl into a first circular path moving longitudinally of a housing, heat is added to the inlet flow of air at the end of the first path to produce hot gases, and the hot gases are directed into a second swirling circular path coaxially of and within the first path and having an open interface therewith, whereby energy is transferred from the hot gases in the second path into the inlet flow of air in the first path. An embodiment of the method is disclosed in the form of a fluid mass reaction engine having an annular housing including an inlet thereinto and an outlet therefrom, a combustion chamber in the housing spaced from the inlet, spaced coaxial openings into and out of the combustion chamber, and a means for heating air flowing through said combustion chamber.

Abstract: Resins are obtained by Diels-Alder polymerization of a monomer of the formula ##STR1## where R is a hydrogen atom or an aryl group; andL is an aromatic linking group.

Abstract: Surgical bone repair cements useful in medical and/or dental applications comprising a bone substitute such as hydroxyapatite, tricalcium phosphate or aluminocalcium oxide-phosphorous pentoxide ceramic and a polyfunctional carboxylic acid such as malic acid, .alpha.-ketoglutaric acid or citric acid as a setting agent.

Abstract: Compositions containing crystalline, long chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.

Abstract: A spun or drawn glass fiber for use in the area of medical implants, and particularly as a reinforcement for bioabsorbable polymeric orthopaedic and dental implants. The glass fiber is bioabsorbable and has sufficient tensile strength and elasticity to be used as a reinforcement. It is made up of 5-50% calcium oxide (CaO), 50-95% phosphorous pentoxide (P.sub.2 O.sub.5), 0-5% calcium fluoride (CaF.sub.2), 0-5% water (H.sub.2 O), and 0-10% XO wherein X is either a single magnesium, zinc or strontium ion or two sodium, potassium, lithium, or aluminum ions and when X is aluminum the O represents three oxygen ions.

Abstract: Intumescent coatings which form a thick, uniform, fine celled, low density foam upon exposure to a high intensity heat flux or flame are disclosed, the invention coatings comprise phenolic resin prepolymer containing a blowing agent and a nucleating agent; in the preferred embodiments the coatings also contains a silicone surfactant, the coatings are useful in thermal and fire protection systems.